Fairfax Weather in July
Average highs run from 82°F on July 1 to 83°F on July 31, and lows from 60°F to 61°F. Normal precipitation for the month is 3.71 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
- 61°F
- Precipitation
- 3.71 in
- Record high
- 110°FJul 13, 1936
- Record low
- 40°FJul 3, 1917
- Chance of a freeze
- 0%
- Days of 90°F or more
- 6.1
- Daylight
- 15 h 29 min to 14 h 40 min
- Cloud cover
- 49%
- Humidity
- 69%
- Dew point
- 61°F
- Wind
- 8.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jul 1 | 82°F | 60°F | 102°F 1911 | 45°F 1969 | 30% | 0% |
| Jul 2 | 82°F | 60°F | 99°F 1911 | 45°F 1917 | 29% | 0% |
| Jul 3 | 82°F | 60°F | 103°F 1990 | 40°F 1917 | 29% | 0% |
| Jul 4 | 82°F | 60°F | 105°F 1966 | 44°F 1917 | 29% | 0% |
| Jul 5 | 83°F | 60°F | 101°F 1911 | 47°F 1950 | 28% | 0% |
| Jul 6 | 83°F | 60°F | 106°F 1936 | 46°F 1942 | 28% | 0% |
| Jul 7 | 83°F | 60°F | 103°F 1936 | 47°F 1908 | 28% | 0% |
| Jul 8 | 83°F | 60°F | 103°F 1936 | 48°F 1953 | 27% | 0% |
| Jul 9 | 83°F | 60°F | 107°F 1976 | 47°F 1953 | 27% | 0% |
| Jul 10 | 83°F | 60°F | 107°F 1936 | 46°F 1953 | 27% | 0% |
| Jul 11 | 83°F | 60°F | 108°F 1936 | 49°F 1945 | 27% | 0% |
| Jul 12 | 83°F | 60°F | 109°F 1936 | 47°F 1959 | 26% | 0% |
| Jul 13 | 83°F | 60°F | 110°F 1936 | 42°F 1917 | 26% | 0% |
| Jul 14 | 83°F | 61°F | 110°F 1936 | 45°F 1930 | 26% | 0% |
| Jul 15 | 84°F | 61°F | 107°F 1936 | 49°F 1952 | 26% | 0% |
| Jul 16 | 84°F | 61°F | 108°F 1936 | 45°F 1958 | 26% | 0% |
| Jul 17 | 84°F | 61°F | 105°F 1936 | 51°F 1958 | 25% | 0% |
| Jul 18 | 84°F | 61°F | 105°F 1940 | 49°F 1914 | 25% | 0% |
| Jul 19 | 84°F | 61°F | 108°F 1934 | 47°F 2009 | 25% | 0% |
| Jul 20 | 84°F | 61°F | 105°F 1932 | 49°F 1950 | 25% | 0% |
| Jul 21 | 84°F | 61°F | 109°F 1934 | 48°F 1911 | 25% | 0% |
| Jul 22 | 84°F | 61°F | 109°F 1934 | 47°F 1925 | 25% | 0% |
| Jul 23 | 84°F | 61°F | 108°F 1934 | 51°F 1978 | 25% | 0% |
| Jul 24 | 84°F | 61°F | 107°F 1940 | 48°F 1911 | 25% | 0% |
| Jul 25 | 84°F | 61°F | 104°F 1941 | 49°F 1911 | 25% | 0% |
| Jul 26 | 84°F | 61°F | 104°F 1930 | 47°F 1962 | 25% | 0% |
| Jul 27 | 84°F | 61°F | 108°F 1931 | 48°F 1971 | 25% | 0% |
| Jul 28 | 84°F | 61°F | 103°F 1941 | 44°F 1925 | 25% | 0% |
| Jul 29 | 84°F | 61°F | 106°F 1935 | 46°F 1952 | 25% | 0% |
| Jul 30 | 83°F | 61°F | 102°F 1933 | 43°F 1971 | 24% | 0% |
| Jul 31 | 83°F | 61°F | 107°F 1988 | 45°F 1971 | 24% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- July 1
- sunrise 5:38 AM, sunset 9:07 PM
- July 31
- sunrise 6:05 AM, sunset 8:45 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00216839 (Redwood Falls), public domain. Records: NOAA GHCN-Daily, station USW00014992, 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.