Boulder Weather in July
Average highs run from 78°F on July 1 to 85°F on July 31, and lows from 46°F to 49°F. Normal precipitation for the month is 1.38 in over about 8 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 83°F
- Average low
- 48°F
- Precipitation
- 1.38 in
- Record high
- 100°FJul 22, 1931
- Record low
- 28°FJul 7, 1971
- Chance of a freeze
- 4%
- Days of 90°F or more
- 6.2
- Daylight
- 15 h 43 min to 14 h 51 min
- Cloud cover
- 43%
- Humidity
- 54%
- Dew point
- 45°F
- Wind
- 5.1 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 |
|---|---|---|---|---|---|
| Jul 1 | 78°F | 46°F | 93°F 2013 | 29°F 1935 | 33% |
| Jul 2 | 78°F | 46°F | 95°F 2013 | 29°F 1955 | 33% |
| Jul 3 | 78°F | 46°F | 92°F 1996 | 30°F 1994 | 32% |
| Jul 4 | 79°F | 46°F | 95°F 1937 | 31°F 1983 | 32% |
| Jul 5 | 79°F | 47°F | 97°F 1919 | 31°F 1932 | 31% |
| Jul 6 | 80°F | 47°F | 96°F 2007 | 31°F 1986 | 31% |
| Jul 7 | 80°F | 47°F | 93°F 1989 | 28°F 1971 | 30% |
| Jul 8 | 80°F | 47°F | 95°F 1921 | 32°F 1955 | 30% |
| Jul 9 | 81°F | 47°F | 95°F 1930 | 34°F 2009 | 30% |
| Jul 10 | 81°F | 48°F | 96°F 1973 | 36°F 1972 | 29% |
| Jul 11 | 82°F | 48°F | 97°F 2002 | 32°F 1951 | 29% |
| Jul 12 | 82°F | 48°F | 98°F 2002 | 33°F 1950 | 28% |
| Jul 13 | 82°F | 48°F | 97°F 2002 | 36°F 1965 | 28% |
| Jul 14 | 83°F | 48°F | 95°F 2002 | 34°F 1913 | 28% |
| Jul 15 | 83°F | 49°F | 95°F 1935 | 33°F 1958 | 27% |
| Jul 16 | 83°F | 49°F | 98°F 1936 | 30°F 1943 | 27% |
| Jul 17 | 84°F | 49°F | 96°F 1998 | 34°F 1982 | 27% |
| Jul 18 | 84°F | 49°F | 95°F 1936 | 35°F 1915 | 27% |
| Jul 19 | 84°F | 49°F | 96°F 1960 | 34°F 1962 | 26% |
| Jul 20 | 84°F | 49°F | 96°F 1960 | 35°F 1987 | 26% |
| Jul 21 | 84°F | 49°F | 97°F 1936 | 31°F 1949 | 26% |
| Jul 22 | 85°F | 49°F | 100°F 1931 | 34°F 1916 | 26% |
| Jul 23 | 85°F | 50°F | 95°F 1931 | 35°F 1954 | 25% |
| Jul 24 | 85°F | 50°F | 97°F 1978 | 38°F 1953 | 25% |
| Jul 25 | 85°F | 50°F | 98°F 1933 | 34°F 1948 | 25% |
| Jul 26 | 85°F | 50°F | 96°F 1931 | 36°F 1999 | 25% |
| Jul 27 | 85°F | 50°F | 95°F 1935 | 38°F 1918 | 25% |
| Jul 28 | 85°F | 50°F | 96°F 1999 | 29°F 1949 | 24% |
| Jul 29 | 85°F | 50°F | 97°F 1934 | 31°F 1959 | 24% |
| Jul 30 | 85°F | 49°F | 98°F 2000 | 37°F 1913 | 24% |
| Jul 31 | 85°F | 49°F | 97°F 2000 | 31°F 1968 | 24% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- July 1
- sunrise 5:41 AM, sunset 9:24 PM
- July 31
- sunrise 6:09 AM, sunset 9:00 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.