Prince William County climate

Prince William County Weather in July

NOAA 1991-2020 normals for Manassas, 3.7 km from Prince William County

Average highs run from 87°F on July 1 to 87°F on July 31, and lows from 67°F to 69°F.

July day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Prince William County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

July at a glance

Average high
88°F
Average low
69°F
Record high
105°FJul 22, 2011
Record low
41°FJul 1, 1988
Chance of a freeze
0%
Days of 90°F or more
16.8
Daylight
14 h 50 min to 14 h 11 min
Cloud cover
57%
Humidity
68%
Dew point
65°F
Wind
4.0 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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Jul 187°F67°F97°F 202641°F 19880%
Jul 287°F68°F98°F 196644°F 19880%
Jul 387°F68°F103°F 196650°F 19620%
Jul 487°F68°F99°F 202648°F 19860%
Jul 587°F68°F99°F 199050°F 19710%
Jul 687°F68°F102°F 197745°F 19790%
Jul 787°F68°F101°F 198847°F 19700%
Jul 888°F68°F101°F 201248°F 19830%
Jul 988°F68°F99°F 198848°F 19840%
Jul 1088°F69°F99°F 198853°F 19630%
Jul 1188°F69°F98°F 198852°F 19830%
Jul 1288°F69°F97°F 198647°F 20020%
Jul 1388°F69°F97°F 196652°F 19780%
Jul 1488°F69°F98°F 199353°F 20090%
Jul 1588°F69°F99°F 202453°F 19810%
Jul 1688°F69°F104°F 198857°F 19660%
Jul 1788°F69°F100°F 198855°F 19760%
Jul 1888°F69°F101°F 201251°F 19850%
Jul 1988°F69°F98°F 197753°F 19760%
Jul 2088°F69°F101°F 198055°F 19740%
Jul 2188°F69°F101°F 199148°F 19660%
Jul 2288°F69°F105°F 201150°F 19740%
Jul 2388°F69°F99°F 199150°F 19770%
Jul 2488°F69°F99°F 201048°F 19850%
Jul 2588°F69°F100°F 201655°F 19760%
Jul 2688°F69°F98°F 196650°F 19760%
Jul 2788°F69°F98°F 199352°F 19770%
Jul 2888°F69°F99°F 199347°F 19770%
Jul 2987°F69°F103°F 201152°F 20140%
Jul 3087°F69°F98°F 198848°F 20140%
Jul 3187°F69°F98°F 199950°F 19970%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Prince William County, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

July 1
sunrise 5:49 AM, sunset 8:39 PM
July 31
sunrise 6:11 AM, sunset 8:22 PM

Every day of July: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00445204 (Manassas), public domain. Records: NOAA GHCN-Daily, station USW00093738, 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.