Boulder Weather in March
Average highs run from 42°F on March 1 to 51°F on March 31, and lows from 17°F to 25°F. Normal precipitation for the month is 0.40 in over about 6 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 47°F
- Average low
- 21°F
- Precipitation
- 0.40 in
- Record high
- 70°FMar 20, 2026
- Record low
- -36°FMar 10, 1948
- Chance of a freeze
- 100%
- Daylight
- 11 h 08 min to 12 h 46 min
- Cloud cover
- 71%
- Humidity
- 72%
- Dew point
- 22°F
- Wind
- 7.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Mar 1 | 42°F | 17°F | 58°F 1901 | -22°F 1976 | 18% |
| Mar 2 | 42°F | 17°F | 60°F 1905 | -31°F 1943 | 18% |
| Mar 3 | 42°F | 17°F | 65°F 1921 | -27°F 2019 | 19% |
| Mar 4 | 43°F | 17°F | 59°F 1921 | -30°F 2019 | 19% |
| Mar 5 | 43°F | 18°F | 59°F 1987 | -26°F 1945 | 19% |
| Mar 6 | 43°F | 18°F | 59°F 2020 | -22°F 1943 | 19% |
| Mar 7 | 44°F | 18°F | 59°F 1904 | -20°F 1943 | 19% |
| Mar 8 | 44°F | 19°F | 57°F 1914 | -18°F 2002 | 19% |
| Mar 9 | 45°F | 19°F | 64°F 1972 | -23°F 1948 | 19% |
| Mar 10 | 45°F | 19°F | 62°F 1989 | -36°F 1948 | 19% |
| Mar 11 | 45°F | 20°F | 65°F 2005 | -28°F 1948 | 19% |
| Mar 12 | 46°F | 20°F | 65°F 1916 | -23°F 1950 | 19% |
| Mar 13 | 46°F | 20°F | 64°F 1994 | -15°F 1897 | 19% |
| Mar 14 | 46°F | 20°F | 63°F 2015 | -13°F 1952 | 19% |
| Mar 15 | 47°F | 21°F | 69°F 1994 | -18°F 1906 | 20% |
| Mar 16 | 47°F | 21°F | 62°F 1916 | -13°F 1906 | 20% |
| Mar 17 | 47°F | 21°F | 65°F 2007 | -18°F 1943 | 20% |
| Mar 18 | 48°F | 22°F | 66°F 2017 | -25°F 1943 | 20% |
| Mar 19 | 48°F | 22°F | 68°F 2026 | -10°F 1955 | 20% |
| Mar 20 | 48°F | 22°F | 70°F 2026 | -17°F 1955 | 20% |
| Mar 21 | 49°F | 22°F | 67°F 1928 | -14°F 1943 | 21% |
| Mar 22 | 49°F | 23°F | 64°F 1928 | -19°F 1898 | 21% |
| Mar 23 | 49°F | 23°F | 66°F 2004 | -15°F 1964 | 21% |
| Mar 24 | 50°F | 23°F | 65°F 2007 | -20°F 1965 | 21% |
| Mar 25 | 50°F | 23°F | 66°F 1999 | -25°F 1955 | 21% |
| Mar 26 | 50°F | 24°F | 67°F 2025 | -24°F 1955 | 22% |
| Mar 27 | 50°F | 24°F | 68°F 2015 | -10°F 1955 | 22% |
| Mar 28 | 50°F | 24°F | 66°F 1986 | -17°F 1975 | 22% |
| Mar 29 | 51°F | 24°F | 68°F 1978 | -11°F 1987 | 22% |
| Mar 30 | 51°F | 24°F | 68°F 2004 | -15°F 1936 | 22% |
| Mar 31 | 51°F | 25°F | 66°F 1923 | -13°F 1936 | 23% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- March 1
- sunrise 7:07 AM, sunset 6:15 PM
- March 31
- sunrise 7:10 AM, sunset 7:56 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00241008 (Boulder), public domain. Records: NOAA GHCN-Daily, station USW00024135, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.