Boulder Weather Records

Boulder, Colorado weather averages and records from 1893–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Boulder, Colorado was 104 °F which occurred on July 11, 1954.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Boulder, Colorado was -33 °F which occurred on January 17, 1930.
Lowest Temperatures: All-Time By Year
Boulder Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 47.0 22.1 73 -33 0.8 11.5
February 48.0 22.9 79 -28 1.0 15.0
March 56.7 29.7 90 -13 2.0 15.9
April 62.7 35.1 88 -3 3.0 14.7
May 71.1 43.2 95 17 3.2 2.0
June 82.2 51.7 104 20 1.9 0.0
July 87.9 57.5 104 40 1.8 0.0
August 86.0 56.1 102 40 1.7 0.0
September 78.7 48.6 100 15 2.1 1.0
October 65.8 37.8 90 -2 1.6 7.0
November 54.3 28.6 80 -12 1.2 13.0
December 46.2 21.7 76 -24 0.8 12.8
Entire year 65.6 38.0 104 -33 21.0 92.4
More Boulder Weather Records
1893–2024
Highest daily low 80 °F June 24, 1954
Lowest daily high -12 °F February 4, 1989
Greatest daily range
(Difference of high and low)
63 °F January 20, 1943
Greatest difference in daily high
over two conscutive days
54 °F Feb 6–7, 1933
Most daily precipitation 9.1 inches September 12, 2013
Most monthly precipitation 18.2 inches September 2013
Most yearly precipitation 34.2 inches 2013
Most yearly days with precipitation 126 1995
Earliest snow in season September 8 2020
Latest snow in season June 12 1947
Most daily snow 22.1 inches October 25, 1997
Most monthly snow 56.7 inches March 1970
Most yearly snow 158.7 inches 1997
Most snow in a winter 152.0 inches 2019–2020
Greatest snow accumulation 30.0 inches October 30, 1941
Earliest freeze September 9 2020
Earliest day ≥ 80 °F March 16 2015
Earliest day ≥ 90 °F March 17 1910
Earliest day ≥ 100 °F June 12 1952
Latest freeze June 29 1935
Latest day ≥ 80 °F November 16 2016
Latest day ≥ 90 °F October 5 1947
Latest day ≥ 100 °F September 2 2019
Most days in a year < 0 °F 15 1916
Most days in a year < 32 °F 169 1984
Most days in a year ≥ 80 °F 127 1956
Most days in a year ≥ 90 °F 60 1952
Most days in a year ≥ 100 °F 6 1954
Boulder Weather Streaks
Most consecutive days...
With precipitation 15 days Jun 4–18, 1967
Without precipitation 55 days Sep 27 – Nov 20, 1934
With snow 8 days Mar 7–14, 1958
High temperature at or
below freezing
12 days Jan 12–23, 1930
High temperature ≥ 80 °F 70 days Jun 19 – Aug 27, 1949
High temperature ≥ 90 °F 18 days Jul 24 – Aug 10, 1947
High temperature ≥ 100 °F 4 days Jul 10–13, 1954
Plant Hardiness Zone
6A
Boulder is in plant hardiness zone 6A
based on average yearly minimum temperature from 1991–2020
Boulder Weather by Year
More Boulder Weather
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Weather Station Details
Years Station Coordinates
1893–2024 Boulder location