Mount Vernon Weather in July
Average highs run from 89°F on July 1 to 89°F on July 31, and lows from 71°F to 72°F. Normal precipitation for the month is 4.33 in over about 11 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
- 90°F
- Average low
- 72°F
- Precipitation
- 4.33 in
- Record high
- 105°FJul 7, 2012
- Record low
- 54°FJul 1, 1988
- Chance of a freeze
- 0%
- Days of 90°F or more
- 15.4
- Daylight
- 14 h 50 min to 14 h 11 min
- Cloud cover
- 54%
- Humidity
- 69%
- Dew point
- 67°F
- Wind
- 4.7 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 | 89°F | 71°F | 99°F 1945 | 54°F 1988 | 35% | 0% |
| Jul 2 | 89°F | 72°F | 102°F 2026 | 56°F 1952 | 35% | 0% |
| Jul 3 | 89°F | 72°F | 102°F 2026 | 58°F 2001 | 35% | 0% |
| Jul 4 | 89°F | 72°F | 103°F 2026 | 59°F 1967 | 35% | 0% |
| Jul 5 | 89°F | 72°F | 102°F 1999 | 59°F 1967 | 35% | 0% |
| Jul 6 | 90°F | 72°F | 103°F 1999 | 57°F 1979 | 34% | 0% |
| Jul 7 | 90°F | 72°F | 105°F 2012 | 60°F 1970 | 34% | 0% |
| Jul 8 | 90°F | 72°F | 102°F 2012 | 58°F 1984 | 34% | 0% |
| Jul 9 | 90°F | 72°F | 100°F 1993 | 58°F 1961 | 34% | 0% |
| Jul 10 | 90°F | 72°F | 102°F 1988 | 56°F 1963 | 34% | 0% |
| Jul 11 | 90°F | 73°F | 99°F 1987 | 61°F 1963 | 34% | 0% |
| Jul 12 | 90°F | 73°F | 97°F 2011 | 57°F 1945 | 34% | 0% |
| Jul 13 | 90°F | 73°F | 100°F 1954 | 62°F 1974 | 33% | 0% |
| Jul 14 | 90°F | 73°F | 101°F 2024 | 63°F 1963 | 33% | 0% |
| Jul 15 | 90°F | 73°F | 102°F 2024 | 60°F 1987 | 33% | 0% |
| Jul 16 | 90°F | 73°F | 104°F 1988 | 60°F 1946 | 33% | 0% |
| Jul 17 | 90°F | 73°F | 102°F 1980 | 57°F 1946 | 33% | 0% |
| Jul 18 | 90°F | 73°F | 101°F 2012 | 60°F 1946 | 33% | 0% |
| Jul 19 | 90°F | 73°F | 99°F 1942 | 61°F 1962 | 33% | 0% |
| Jul 20 | 90°F | 73°F | 99°F 1991 | 63°F 1947 | 33% | 0% |
| Jul 21 | 90°F | 73°F | 101°F 1957 | 58°F 1965 | 33% | 0% |
| Jul 22 | 90°F | 73°F | 102°F 2011 | 59°F 1944 | 33% | 0% |
| Jul 23 | 90°F | 73°F | 102°F 2011 | 58°F 1947 | 33% | 0% |
| Jul 24 | 90°F | 73°F | 101°F 2010 | 57°F 1947 | 32% | 0% |
| Jul 25 | 90°F | 73°F | 100°F 2016 | 61°F 1947 | 32% | 0% |
| Jul 26 | 90°F | 73°F | 100°F 2012 | 62°F 1976 | 32% | 0% |
| Jul 27 | 90°F | 73°F | 99°F 1997 | 59°F 1946 | 32% | 0% |
| Jul 28 | 89°F | 73°F | 100°F 1941 | 59°F 1962 | 32% | 0% |
| Jul 29 | 89°F | 73°F | 104°F 2011 | 61°F 1946 | 32% | 0% |
| Jul 30 | 89°F | 72°F | 99°F 1953 | 60°F 1956 | 32% | 0% |
| Jul 31 | 89°F | 72°F | 103°F 1954 | 58°F 1956 | 32% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- July 1
- sunrise 5:47 AM, sunset 8:37 PM
- July 31
- sunrise 6:09 AM, sunset 8:20 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00013743 (Washington Reagan AP), public domain. Records: NOAA GHCN-Daily, station USW00013743, 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.