Grundy County Weather in August
Average highs run from 83°F on August 1 to 82°F on August 31, and lows from 63°F to 60°F. Normal precipitation for the month is 4.27 in over about 12 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 83°F
- Average low
- 62°F
- Precipitation
- 4.27 in
- Record high
- 106°FAug 9, 1930
- Record low
- 43°FAug 26, 1917
- Chance of a freeze
- 0%
- Days of 90°F or more
- 3.6
- Daylight
- 13 h 54 min to 12 h 56 min
- Cloud cover
- 53%
- Humidity
- 70%
- Dew point
- 64°F
- Wind
- 3.6 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 |
|---|---|---|---|---|---|---|
| Aug 1 | 83°F | 63°F | 105°F 1915 | 52°F 1895 | 39% | 0% |
| Aug 2 | 83°F | 63°F | 102°F 1918 | 55°F 1895 | 38% | 0% |
| Aug 3 | 83°F | 63°F | 99°F 1901 | 51°F 1976 | 38% | 0% |
| Aug 4 | 83°F | 63°F | 100°F 2010 | 50°F 1907 | 38% | 0% |
| Aug 5 | 83°F | 63°F | 101°F 1930 | 50°F 1912 | 38% | 0% |
| Aug 6 | 83°F | 63°F | 102°F 1930 | 52°F 1915 | 38% | 0% |
| Aug 7 | 83°F | 62°F | 102°F 1913 | 53°F 2004 | 38% | 0% |
| Aug 8 | 83°F | 62°F | 105°F 1930 | 50°F 1989 | 37% | 0% |
| Aug 9 | 83°F | 62°F | 106°F 1930 | 49°F 1989 | 37% | 0% |
| Aug 10 | 83°F | 62°F | 101°F 1918 | 53°F 1922 | 37% | 0% |
| Aug 11 | 83°F | 62°F | 101°F 1918 | 52°F 1967 | 37% | 0% |
| Aug 12 | 83°F | 62°F | 100°F 1913 | 51°F 1930 | 37% | 0% |
| Aug 13 | 83°F | 62°F | 101°F 2010 | 46°F 1964 | 37% | 0% |
| Aug 14 | 83°F | 62°F | 100°F 1918 | 50°F 2004 | 36% | 0% |
| Aug 15 | 83°F | 62°F | 101°F 2007 | 49°F 2008 | 36% | 0% |
| Aug 16 | 83°F | 62°F | 103°F 2007 | 51°F 1929 | 36% | 0% |
| Aug 17 | 83°F | 62°F | 102°F 1918 | 53°F 1914 | 36% | 0% |
| Aug 18 | 83°F | 62°F | 100°F 1913 | 53°F 1902 | 36% | 0% |
| Aug 19 | 83°F | 62°F | 101°F 1925 | 54°F 1953 | 35% | 0% |
| Aug 20 | 83°F | 61°F | 101°F 1925 | 53°F 1927 | 35% | 0% |
| Aug 21 | 83°F | 61°F | 102°F 1983 | 50°F 1927 | 35% | 0% |
| Aug 22 | 83°F | 61°F | 102°F 1924 | 48°F 1956 | 35% | 0% |
| Aug 23 | 83°F | 61°F | 102°F 2007 | 49°F 1956 | 34% | 0% |
| Aug 24 | 83°F | 61°F | 101°F 2007 | 50°F 1997 | 34% | 0% |
| Aug 25 | 83°F | 61°F | 100°F 1918 | 48°F 1917 | 34% | 0% |
| Aug 26 | 82°F | 61°F | 99°F 1913 | 43°F 1917 | 34% | 0% |
| Aug 27 | 82°F | 61°F | 102°F 1924 | 50°F 2025 | 33% | 0% |
| Aug 28 | 82°F | 60°F | 101°F 1913 | 50°F 1927 | 33% | 0% |
| Aug 29 | 82°F | 60°F | 101°F 1924 | 49°F 1986 | 33% | 0% |
| Aug 30 | 82°F | 60°F | 99°F 1907 | 49°F 1943 | 33% | 0% |
| Aug 31 | 82°F | 60°F | 100°F 1951 | 48°F 1946 | 33% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- August 1
- sunrise 5:52 AM, sunset 7:46 PM
- August 31
- sunrise 6:15 AM, sunset 7:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00401887 (Coalmont), public domain. Records: NOAA GHCN-Daily, station USC00405882, 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.