Saint Charles County climate

Saint Charles County Weather in July

NOAA 1991-2020 normals for St Peters 2 Se, 7.6 km from Saint Charles County

Average highs run from 88°F on July 1 to 88°F on July 31, and lows from 67°F to 67°F. Normal precipitation for the month is 4.23 in over about 9 wet days.

July day by day

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

Normal daily high and low temperature at Saint Charles 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
68°F
Precipitation
4.23 in
Record high
108°FJul 7, 2012
Record low
50°FJul 28, 2013
Chance of a freeze
0%
Days of 90°F or more
13.4
Daylight
14 h 50 min to 14 h 11 min
Cloud cover
49%
Humidity
73%
Dew point
67°F
Wind
6.3 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 188°F67°F102°F 201257°F 199531%0%
Jul 288°F67°F101°F 201256°F 199531%0%
Jul 388°F67°F99°F 201257°F 201031%0%
Jul 488°F67°F103°F 201254°F 201430%0%
Jul 588°F67°F104°F 201256°F 201430%0%
Jul 688°F67°F107°F 201256°F 200630%0%
Jul 788°F68°F108°F 201255°F 200630%0%
Jul 888°F68°F98°F 200157°F 201830%0%
Jul 988°F68°F99°F 199059°F 202329%0%
Jul 1088°F68°F98°F 198957°F 201429%0%
Jul 1188°F68°F98°F 202257°F 199929%0%
Jul 1288°F68°F99°F 199558°F 199929%0%
Jul 1388°F68°F99°F 199557°F 200129%0%
Jul 1488°F68°F101°F 198856°F 199029%0%
Jul 1588°F68°F102°F 198855°F 200128%0%
Jul 1688°F68°F101°F 198852°F 201428%0%
Jul 1788°F68°F102°F 201251°F 201428%0%
Jul 1888°F68°F104°F 201259°F 201428%0%
Jul 1988°F68°F103°F 201254°F 201428%0%
Jul 2088°F68°F99°F 201755°F 200927%0%
Jul 2188°F68°F101°F 201757°F 200727%0%
Jul 2288°F68°F104°F 201755°F 200027%0%
Jul 2388°F68°F106°F 201256°F 200027%0%
Jul 2488°F68°F106°F 201255°F 200327%0%
Jul 2588°F68°F106°F 201254°F 200027%0%
Jul 2688°F67°F101°F 199957°F 200427%0%
Jul 2788°F67°F101°F 201253°F 200427%0%
Jul 2888°F67°F99°F 201150°F 201327%0%
Jul 2988°F67°F103°F 199952°F 201427%0%
Jul 3088°F67°F102°F 199954°F 199126%0%
Jul 3188°F67°F102°F 200657°F 199226%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Saint Charles County, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

July 1
sunrise 5:42 AM, sunset 8:32 PM
July 31
sunrise 6:03 AM, sunset 8:14 PM

Every day of July: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00237475 (St Peters 2 Se), public domain. Records: NOAA GHCN-Daily, station USW00003966, 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.