Sullivan Weather in August
Average highs run from 91°F on August 1 to 87°F on August 31, and lows from 67°F to 63°F. Normal precipitation for the month is 3.84 in over about 8 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
- 89°F
- Average low
- 66°F
- Precipitation
- 3.84 in
- Record high
- 109°FAug 29, 1984
- Record low
- 41°FAug 21, 1950
- Chance of a freeze
- 0%
- Days of 90°F or more
- 16.2
- Daylight
- 14 h 07 min to 13 h 02 min
- Cloud cover
- 48%
- Humidity
- 69%
- Dew point
- 64°F
- Wind
- 3.4 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 | 91°F | 67°F | 104°F 1980 | 51°F 1960 | 25% | 0% |
| Aug 2 | 91°F | 67°F | 106°F 1987 | 53°F 1973 | 25% | 0% |
| Aug 3 | 91°F | 67°F | 106°F 1964 | 46°F 1950 | 25% | 0% |
| Aug 4 | 91°F | 67°F | 104°F 1947 | 47°F 1974 | 26% | 0% |
| Aug 5 | 91°F | 67°F | 107°F 1956 | 49°F 1974 | 26% | 0% |
| Aug 6 | 90°F | 67°F | 105°F 1947 | 48°F 1948 | 26% | 0% |
| Aug 7 | 90°F | 67°F | 102°F 2007 | 49°F 1957 | 26% | 0% |
| Aug 8 | 90°F | 67°F | 104°F 1956 | 48°F 1989 | 26% | 0% |
| Aug 9 | 90°F | 67°F | 104°F 1944 | 50°F 1976 | 26% | 0% |
| Aug 10 | 90°F | 67°F | 105°F 1944 | 49°F 1972 | 26% | 0% |
| Aug 11 | 90°F | 67°F | 106°F 1944 | 52°F 1989 | 26% | 0% |
| Aug 12 | 90°F | 67°F | 106°F 2007 | 48°F 1967 | 26% | 0% |
| Aug 13 | 90°F | 67°F | 102°F 1944 | 45°F 1964 | 26% | 0% |
| Aug 14 | 90°F | 66°F | 107°F 2007 | 49°F 2004 | 26% | 0% |
| Aug 15 | 90°F | 66°F | 108°F 2007 | 49°F 1963 | 26% | 0% |
| Aug 16 | 90°F | 66°F | 102°F 1988 | 48°F 1992 | 26% | 0% |
| Aug 17 | 90°F | 66°F | 104°F 2000 | 51°F 1992 | 26% | 0% |
| Aug 18 | 90°F | 66°F | 106°F 1954 | 54°F 1992 | 26% | 0% |
| Aug 19 | 89°F | 66°F | 105°F 1962 | 46°F 1953 | 26% | 0% |
| Aug 20 | 89°F | 66°F | 106°F 1962 | 46°F 1967 | 26% | 0% |
| Aug 21 | 89°F | 66°F | 104°F 2003 | 41°F 1950 | 26% | 0% |
| Aug 22 | 89°F | 65°F | 102°F 1938 | 44°F 1950 | 26% | 0% |
| Aug 23 | 89°F | 65°F | 105°F 1938 | 48°F 1949 | 26% | 0% |
| Aug 24 | 89°F | 65°F | 106°F 1938 | 46°F 1942 | 26% | 0% |
| Aug 25 | 88°F | 65°F | 103°F 1943 | 47°F 1958 | 26% | 0% |
| Aug 26 | 88°F | 64°F | 104°F 1943 | 48°F 1945 | 26% | 0% |
| Aug 27 | 88°F | 64°F | 99°F 1953 | 47°F 1946 | 26% | 0% |
| Aug 28 | 88°F | 64°F | 102°F 1990 | 43°F 1967 | 26% | 0% |
| Aug 29 | 88°F | 64°F | 109°F 1984 | 41°F 1986 | 26% | 0% |
| Aug 30 | 87°F | 63°F | 106°F 1984 | 43°F 1986 | 26% | 0% |
| Aug 31 | 87°F | 63°F | 105°F 1953 | 45°F 1946 | 26% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- August 1
- sunrise 6:07 AM, sunset 8:14 PM
- August 31
- sunrise 6:34 AM, sunset 7:36 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00238515 (Union), public domain. Records: NOAA GHCN-Daily, station USC00238515, 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.