Saint Clair County climate

Saint Clair County Weather in August

NOAA 1991-2020 normals for Richmond 4 Nnw, 12.2 km from Saint Clair County

Average highs run from 82°F on August 1 to 78°F on August 31, and lows from 62°F to 57°F. Normal precipitation for the month is 3.27 in over about 10 wet days.

August day by day

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

Normal daily high and low temperature at Saint Clair County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
80°F
Average low
59°F
Precipitation
3.27 in
Record high
102°FAug 8, 2001
Record low
37°FAug 25, 1942
Chance of a freeze
0%
Days of 90°F or more
2.5
Daylight
14 h 30 min to 13 h 13 min
Cloud cover
55%
Humidity
76%
Dew point
61°F
Wind
8.7 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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 182°F62°F96°F 200647°F 195231%0%
Aug 282°F62°F101°F 198849°F 195131%0%
Aug 382°F61°F99°F 194449°F 196531%0%
Aug 482°F61°F97°F 194449°F 194531%0%
Aug 582°F61°F96°F 195543°F 194331%0%
Aug 682°F61°F98°F 200147°F 194831%0%
Aug 781°F61°F97°F 200143°F 194131%0%
Aug 881°F61°F102°F 200143°F 198931%0%
Aug 981°F61°F97°F 194949°F 194831%0%
Aug 1081°F61°F98°F 194447°F 197231%0%
Aug 1181°F60°F100°F 194446°F 196531%0%
Aug 1281°F60°F96°F 201644°F 195031%0%
Aug 1381°F60°F96°F 198845°F 194131%0%
Aug 1480°F60°F100°F 194441°F 194131%0%
Aug 1580°F60°F96°F 194448°F 194831%0%
Aug 1680°F60°F93°F 198745°F 194531%0%
Aug 1780°F59°F96°F 195047°F 194131%0%
Aug 1880°F59°F93°F 193647°F 197731%0%
Aug 1980°F59°F97°F 195544°F 194431%0%
Aug 2080°F59°F98°F 195540°F 197731%0%
Aug 2179°F59°F102°F 195540°F 195031%0%
Aug 2279°F59°F100°F 195543°F 194931%0%
Aug 2379°F58°F95°F 196844°F 195131%0%
Aug 2479°F58°F96°F 194838°F 194031%0%
Aug 2579°F58°F98°F 194837°F 194231%0%
Aug 2678°F58°F97°F 195339°F 194431%0%
Aug 2778°F57°F98°F 194843°F 194131%0%
Aug 2878°F57°F98°F 197341°F 198631%0%
Aug 2978°F57°F97°F 195341°F 198630%0%
Aug 3078°F57°F101°F 195343°F 197630%0%
Aug 3178°F57°F96°F 195348°F 197630%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Saint Clair 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 (EDT).

August 1
sunrise 6:22 AM, sunset 8:52 PM
August 31
sunrise 6:54 AM, sunset 8:07 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00206982 (Richmond 4 Nnw), public domain. Records: NOAA GHCN-Daily, station USC00206680, 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.