Boulder Daily Climatology and Daily Records

The average high and low temperature as well as the record for each date for the high (highest daily maximum and highest daily minimum) as well as record lowest daily minimum and daily maximum are available for each date (divided into monthly sections). Snow records are from 1948 onward and temperature from 1897. Hail is counted for the purposes of records. Temperatures are in degrees Fahrenheit and snow depths are in inches as those are the unit of measurement.

Separate NIST site records are available: The site has been in its current location at NIST since Apr 1990:

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JanuaryFebruaryMarchAprilMayJune
JulyAugust SeptemberOctoberNovemberDecember

For record highs, the first value is the highest daily maximum value. The 2nd is the highest daily minimum value. For lows, the first is the lowest daily minimum value and the 2nd is the lowest daily maximum value. Year is for the highest maximum temperature and for the lowest minimum.

 
January climatology
DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1411870/441997-14/-319427.5(1985)
2421770/491997-14/419116.0(1971
3421868/441918,1997-10/419118.5(1949
4431967/441927-14/8195910.7(2014
5441969/442012,1956-13/8194211.5(2007
6431970/461954-20/-919139.2(1998)
7441969/492006-22/-419131.5(1986)
8452170/501909-16/2193715.5(1962)
9442272/471953-11/919734.1(1993)
10442070/551990-13/919627.4(2001)
11431869/431953-18/-219634.7(2012)
12441870/461953-22/119636.0(2009)
13452169/451928-12/319973.0(1972)
14472367/522006-9/619725.0(1967)
15452369/451901-11/2202410.0(1987)
16452171/461974-14/420247.0(2001)
17442067/391974-33/619304.7(1996)
18442165/431965,2009-19/519845.8(2023)
19452169/511986,2009,2017-17/619638.5(1990)*
20441973/472005-15/619359.1(1973)
21441970/432009-18/019307.1(2017)
22442174/491925-11/1019173.3(1974)
23452071/381981-10/1219634.4(2002)
24452270/441968-8/8194910.4(1978)
25452170/471935-8/1019036.5(1996)
26442072/451982-20/719039.8(2014)
27451972/492015-6/420095.7(2014)
28452068/502011-9/719038.6(1989)
29442070/441931-12/-319516.5(1994)
30441971/471986-7/820235.8(2002)
31452069/531989-9/419857.6(2005)
* snow record not from official dataset Back to top

February climatology  

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1442071/481934-15/619515.4(2016)
2442075/492020-17/1201111.2(2016)
3442274/471954-17/-5198916.4(2012)
4462173/461935-18/-1219898.6(2020)
5462275/461963-24/619893.3(1975)
6462270/452015-16/519145.7(2019)
7462074/441987-19/-319336.5(1980)
8452079/511954-28/7193613.5(1956)
9442178/471954-16/-719336.0(1953)
10472276/572017-15/1219335.5(1988)
11472275/491962-15/119058.5(2020)
12482372/451921-20/4190510.4(1968)
13462374/501979-9/719056.4(1966)
14452170/481981-8/420214.9(2001)
15452067/451982,2017-12/101903,20219.1(2023)
16472373/422017-11/519008.1(2015)
17472368/481970-11/1019365.7(2022)
18462373/462016-14/920067.1(2021)
19462271/491981-4/1620067.6(1987)
20472374/481981-6/1520188.0(1971)
21462377/461982 4/1519116.4(2015)
22482373/451982-2/1520228.5(1960,2015)
23472374/522002-13/920237.0(1997)
24462372/541981-5/1120238.0(2013)
25472475/581986-6/1719358.1(2021)
26472372/441932-6/919629.5(2015)
27472375/501932-8/719624.3/2003
28472374/501932,2006-11/1219626.0(2007)
29512368/481940-5/2419602.2(2004)
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March climatology 

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1482473/512008-1/1719279.0(2002)
2492475/511901-6/1520024.0(2020)
3472473/461921-4/1419437.0(1964)
4452374/492009-5/1020195.1(1976)
5462373/441925-2/1519489.2(1971)
6482373/511972-8/221943 11.6(1990)*
7492370/431972-8/201943 10.0(1998)
8512574/511986-1/131932/985.2(2006)
9512777/471989-13/131932 16.1(1992)
10502679/501900-7/1119325.5(1970)
11492678/561900-9/121932 11.0(1956)
12502674/521900-10/171932 13.0(1963)
13512675/5220074/2519507.0(1963)
14492676/5119254/20192517.5(2021)
15492678/522015,20172/1719064.0(1960)
16532780/502015-4/1219068.0(1983)
17542875/5419080/1819245.6(1988)
18532880/492017-5/141923 16.9(1998)
19522879/621907-1/161965 12.3(2010)
20522980/571997-3/1619276.5(1989)
21532883/541910-1/241914 17.1(1952)
22552980/5619100/1418986.5(1984)
23542976/521967,20123/18189816.4(2016)
24533076/5119982/?1965 10.2(1996)
25532978/531985-2/141996 12.5(1959)
26522779/511971-1/23195516.2(2009)
27522778/551986-5/201931 10.6(1975)
28532878/491986-2/2319759.4(1972)
29532979/5519434/2319758.3(1987)
30562879/5120106/291926 18.5(1970)
31573081/5620121/2118998.7(1988)
* snow record not from official dataset Back to top

April climatology 

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1563178/522004 7/25193610.4(1975)
2583382/512011-3/33197520.6(1957)
3563177/53194312/26194512.0(1986)
4563180/472021 9/201945 8.2(2017)
5583280/521991 5/321939 6.8(1990)
6593380/541991 4/221938 4.1(2018)
7573381/53193015/26193812.3(1957)
8573383/511930 9/32197311.5(1959)
9593378/541977,2019 8/28197313.1(2013)
10593480/551960 2/29201311.1(1995)
11583484/562023 9/26194012.0(1953)
12593482/502023 2/331997 8.8(2020)
13613583/52200612/27202210.3(1974)
14623680/57196310/272020 3.6(1949)
15623685/54198515/33194510.4(2013)
16613581/52195821/311947 6.5(2016)
17623683/55198717/311901 11.8(2016)
18623684/53198710/31201316.9(2020)
19613782/551962,202213/341966 5.0(1966)
20623683/68198910/34202110.5(1984)
21643788/54198914/351907 4.8(1952)
22653985/59202218/421920 7.4(2001)
23633987/57199422/321931 7.5(2013)
24623887/56201218/32201316.4(1997)
25623784/59193820/331924 2.5(2006)
26633885/55194615/291924 4.0(1995)
27633885/59191022/371924 3.7(2009)
28643882/60194323/301917 2.1(2005)
29633884/59194821/331903 8.5(2005)
30633887/55199219/341909 6.7(1991)
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May climatology  

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1653986/55194323/34190910.7(2013)
2654186/56198117/3520132.5(1954)
3654086/60194720/3019070.5(1967)
4674188/592000,201228/3519441.0(1950)
5674289/60200029/3519509.0(1978)
6654087/591963,2000,2004 22/37191714.0(1978)
7664287/65196328/4120100.9(2010)
8664286/62201130/3920100
9684288/59191625/3420022.3(2019)
10674388/62191626/2919795.2(2003)
11684288/61196321/4519461.7(2014)
12684288/60196224/3319535.1(2014)
13684289/65198827/381953Tr(2010)
14684388/60199627/3919122.0(1967)
15694493/59197829/4219160
16694493/62199630/3719234.0(1957)
17724592/61196428/3919427.1(1983)**
18724693/59197029/4019305.3(2017)
19714592/63193922/4019461.5/1960
20704593/62195421/4019463.8/2022
21704590/682006 26/3520015.1(2019)
22704589/66201232/351931,20190
23714690/651989,00 34/481930Tr(1971),1994
24734790/58196732/441994,20021.1(2002)
25734787/661969,201332/5019508.7(1950)
26724791/66196932/4719500.0(1950)
27714792/60200633/5219500
28714795/60200030/3619470
29734895/722000,330/451947Tr(1975)
30744891/68198434/421973Tr(1973)
31734889/69200231/5119790
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June climatology  

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1734889/62199732/481979
2744892/63200630/4519511.5(1951)
3744995/65195832/4619510.7(1951)
4754994/66199036/521937
5765095/61194633/491937Tr(1953)
6754995/70200033/541998
7765095/651934/2000 35/5519150.1(93 ()hail)
8765098/64198534/582007hail
9775096/65198537/562014
10775197/70195237/491975
11775399/69202236/441975
127852100/67195232/4419471.0(1947)
13795398/69195232/451947Tr(1969)
147952100/67200635/501969
157953100/71195232/451945
16805399/65202132/441945
17805398/681946 38/491912hail
18805398/701936,201241/531945
19815397/74193438/561976
20825497/68201739/671946
21815599/68201641/602000hail
22835598/811954,201240/562004 Tr(1996) (hail)
238456104/74195440/642019
248356101/80201239/551906Tr(2006) (hail)
258456101/69201242/611958
268456101/691971,199442/611968,2003
278657100/69199041/701985
28865898/73201847/611945
29855799/73195345/581978
30845799/70199441/581935
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July climatology  

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) rain/year snow/year
18456101/75200246/671995,2018 1.36(2021) 
2855799/71199045/671915 0.71(2019) 
3855898/73196443/571922 0.76(1972) 
4855798/731989,201140/561921 0.52(1972) 
5855899/76198942/691972 0.61(2023) 
68557100/69197344/621931 0.48(2015) 
78558100/72195141/621904 1.08(2010) 
88558100/75198946/671929 1.47(1967) 
9865899/701976,202246/631929 1.98(2012) 
108659100/75195449/701922 1.78(1983) 
118659104/76195450/681944 0.58(1993) 
128559103/75195447/621922 0.69(1987) 
138760102/71195444/661987 0.37(1973) 
148559 99/72193147/641973 0.41(1993) 
158558100/70192546/641908 0.45(2018) 
168659100/74200647/651992 0.67(2012) 
17865998/712002,2010 46/671992 1.81(2000) 
188560100/721998,202049/611972 0.30(1965) 
198559100/741934,202246/631902 0.63(1985) 
208559100/82199845/651900 2.12(1990) 
218559101/722005 48/661915 2.18(1977) 
228559102/77193147/671973 0.61(1998) 
23855999/75200547/611990 1.66(2004) 
248459101/741953,2003 49/58 2004 0.82(1965) 
25865999/72193149/731973 1.80(1977) 
26866098/76193548/711926 1.06(1964) 
278660101/70194748/681913 1.02(1982) 
288660100/72194752/701911,2009 1.11(2022) 
298660100/73194746/681971 1.26(1953) 
308659 97/72196645/571971 2.56(2014) 
31 86 59100/692002 47/672009 1.47(1956) 
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August climatology 

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) rain/year snow/year
18560100/73193844/621995 0.60(2023) 
2856099/72200849/641995* 0.69(1976) 
3845998/73195449/591915 3.06(1951) 
4855998/75194745/641927 1.79(1999) 
5855998/70196247/681928 0.98(2002) 
68459101/76197950/721921 1.59(1997) 
7845999/70197547/541939 0.38(1988) 
88558101/72196946/681939 0.25(1963)  
98459101/69194745/651939 1.00(2001) 
10845897/74196940/621912 1.40(1968)  
11845797/70195947/651974 1.91(1994) 
12855899/72199647/682004 0.53(1990) 
13855897/68200744/682007 0.82(1975) 
14855899/74193548/622004 0.93(1961) 
15855897/69194447/631978 0.87(2008) 
168559100/71200247/561975,2009 1.31(2008) 
17845897/73194845/722008 0.88(1997) 
18845898/77200248/701987 1.32(2003) 
19835796/702013,2019,202343/601939 1.42(2004) 
20825798/70201943/612016 1.65(1982) 
21825798/76202344/601920 0.26(1999) 
22825697/70194946/641966 0.60(1984) 
23835798/69201147/581945 0.41(1952) 
248357102/70193645/631968 2.00(1992) 
25845697/762019,202037/611910 0.54(2023) 
26845796/73195339/661910 0.37(1980) 
27835796/71192639/651910 0.22(2023) 
28835696/70194840/652004 0.34(2014) 
29825697/69195444/632004 0.47(1952) 
30825696/721948,200546/691964 1.83(1967) 
31825596/691960,201142/591932 1.93(1951) 
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September climatology 

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) rain/year snow/year
1835598/72201942/611967 0.57(1966)0.0
28254100/691983,201942/671974 0.92(1966)0.0
3815394/751960,201333/511961 1.16(1961)Tr(1961)
4805396/67196039/581961 0.50(1971)0.0
5805399/69202040/581968 0.96(2018)0.0
6815399/68202038/501929 0.33(1996)0.0
7805495/66202234/411929 1.02(2011)0.0
8785397/66202235/411941 1.31(2001)Tr(2001)
9785195/69202130/462020 0.85(2020)1.7(2020)
10785099/65202135/421962,2020 1.02(2013)4.0(2020)
11775195/64202134/431898 1.92(2013)0.6(1989)
12775093/69195631/4019749.08(2013)2.7(1974)
13765095/69199031/501993 2.44(2013)1.0(1993)
14764994/63199028/4419930.85(1982)0.0
15754993/65201830/4419031.94(2013)0.0
16754893/62200030/4719120.49(2013)Tr(1965)
17764893/65200027/361965 1.64(1971)18.0(1971)
18764993/64194730/441971 0.89(1993)3.0(1971)
19764993/65201022/4519710.82(1996)0.0
20754793/66195629/3619831.50(1961)2.3(1965)
21744689/67200731/3619121.07(1995)8.3(1995)
22744790/63195423/3919951.47(1970)T(1994)
23734791/67194730/3920000.80(1997)1.4(2000)
24734692/66194928/3820001.44(1959)5.1(2000)
25734588/66195324/4619261.54(1970)1.5(1970)
26714590/67202128/451942 0.51(1996,2012)3.3(1996)
27724392/60195324/3619080.50(1976)2.8(1996)
28714490/63201023/351945 1.23(1985)9.0(1985)
29714489/64196418/351985 1.03(1959)10.4(1959)
30724591/66198015/3719850.82(1991)0.5(1959)
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October climatology 

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1724590/62195323/361985 3.5(1959)
2724585/64201227/441959 2.8(1959)
3714488/60196730/471927,2009 2.0(1969)
4714488/61192230/37195010.2(1969)
5694390/63194727/421991 3.0(1969)
6684285/611993,202028/351995 0.9(2000)
7704288/64195623/421970 3.5(1970)
8694286/59196522/341970 4.1(1990)
9694286/64196524/381990 6.0(1985)
10694288/62191015/382009 4.8(2009)
11694187/58199615/292019 9.7(1969)
12674089/58195020/271969 6.5(1969)
13684188/63198910/301969 2.0(1985)
14674185/59196213/361969 8.9(2018)
15664085/61195813/442018 9.2(1969)
16653887/55199120/35196912.0(1948)
17653885/592003,202315/331999 3.7(2006)
18653886/57192619/261925 3.2(2013)
19633887/59200317/301925 1.5(1982)
20643887/591950,202319/361916 3.2(1949)
21653884/60195012/281911 5.8(2006)
22633885/60200319/281936 3.0(1995)
23633686/52200322/291906 4.8(1975)
24633683/58201419/321975 7.7(1997)
25623685/55201710/32202022.1(1997)
26623681/5519665/182020 11.5(2011)
27623682/5420164/342020 3.9(2019)
28613680/60201611/281925 16.7(2009)
29583483/551968-2/21191710.2(1961)
30583480/5619333/232019 9.6(1972)
31583383/5619503/212019 4.9(1989)*
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November climatology 

DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1573475/52198810/2519519.7(1972)
2563079/541931-2/1819518.6(2011)
3573177/511915,2015,2020 1/3019914.8(1990)
4583279/511952,202014/2719673.7(2022)
5573178/581952,2023 6/3119336.5(1951)
6583277/55198011/3119388.2(1990)
7563278/541980,2021 9/2819904.1(1998)
8563078/60197817/28199012.4(1950)
9553079/562019 5/22195010.0(1985)
10573075/561956,2005-3/1819504.0(1997)
11542979/521989-1/7191112.6(2018)
12542978/521989-2/1019119.0(1979)
13532974/531999-11/920142.0(1980)
14552875/461905-2/28191616.0(1994)
15542979/532016 1/2519978.0(1987)
16522880/562016 -1/2620147.3(1996)
17522975/481981 4/2519035.1(1969)
18512878/482008 2/2019035.6(2022)
19532878/581989 5/1520227.5(1956)
20522875/541939 3/23190622.0(1979)
21502672/502012 0/2019296.9(1992)
22522573/541939/2006-7/8192910.5(1999)
23522773/501939-2/15200312.1(1992)
24532772/492017 3/2719189.3(1992)
25532977/501990 -8/2219936.3(1952)
26512773/522017-1/27191920.7(2019)
27482576/562017-12/3191911.5(1983)
28492470/522014-12/1219196.1(2004)
29492476/541899 1/25191911.8(2006)
30502668/571956 0/121975/20066.0(1986)
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December climatology  

tr>
DayNormal
High
Normal
Low
Record
High
Year(s)Record
Low
Year(s) snow/year
1492672/512021-5/919857.6(2011)
2502572/482021-9/1319196.9(2009)
3492670/501941-2/2519198.0(2011)
4482575/481965-1/81909,20097.2(2008)
5472471/462012-12/719728.4(1972)
6482369/431981-16/519728.0(1964)
7462368/451984-15/7192712.4(1988)
8452171/471940-9/719324.7(1967)
9442174/481957-20/-2191910.5(1985)
10462170/471915-12/319323.2(1963)
11462271/461934-18/-319326.7(2007)
12462268/472017-19/1419327.1(1967)
13442174/531921-10/519264.5(1987)
14432069/451924-11/519267.2(1965)
15452070/462006-15/7200811.3(2015)
16452269/531941-7/1220084.8(1992)
17442176/551980-9/1019645.2(2016)
18442269/461979-14/1319094.9(1973)
19452169/501979-17/1019243.7(2012)
20452270/471954-16/3192415.7(2006)
21442266/441982-20/8199010.3(2006)
22442371/471982-24/0199014.6(2011)
23442271/541955-14/220225.9(2009)
24462270/621955-18/-2192418.0(1982)
25452168/472005-10/1219836.7(2012)
26442070/441947-6/1019167.0(1988)
27442074/441980-10/8191612.6(1987)
28462167/441980-8/1519249.0(1979)
29452269/441965-10/11198312.5(2006)
30442171/491980-11/1119906.2(2010)
31421866/481904-18/619238.0(1994)
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Records and daily data are sometimes from different sources and may not agree. I attempt to fix discrepancies when possible.