Lewis County Weather in August
Average highs run from 83°F on August 1 to 77°F on August 31, and lows from 49°F to 45°F. Normal precipitation for the month is 0.78 in over about 5 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
- 81°F
- Average low
- 48°F
- Precipitation
- 0.78 in
- Record high
- 106°FAug 4, 1961
- Record low
- 29°FAug 24, 1992
- Chance of a freeze
- 8%
- Days of 90°F or more
- 4.9
- Daylight
- 14 h 48 min to 13 h 21 min
- Cloud cover
- 36%
- Humidity
- 53%
- Dew point
- 47°F
- Wind
- 4.7 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Aug 1 | 83°F | 49°F | 100°F 1971 | 38°F 1963 | 13% | 0% |
| Aug 2 | 83°F | 49°F | 101°F 1961 | 38°F 1987 | 13% | 0% |
| Aug 3 | 83°F | 49°F | 100°F 1961 | 38°F 1956 | 13% | 0% |
| Aug 4 | 83°F | 49°F | 106°F 1961 | 40°F 1956 | 13% | 0% |
| Aug 5 | 83°F | 49°F | 103°F 1998 | 41°F 1935 | 13% | 0% |
| Aug 6 | 83°F | 49°F | 96°F 1930 | 40°F 1969 | 13% | 0% |
| Aug 7 | 83°F | 49°F | 100°F 1983 | 38°F 1946 | 14% | 0% |
| Aug 8 | 83°F | 49°F | 101°F 1930 | 39°F 1946 | 14% | 0% |
| Aug 9 | 83°F | 49°F | 100°F 1935 | 40°F 1995 | 14% | 0% |
| Aug 10 | 82°F | 49°F | 100°F 1996 | 40°F 1947 | 14% | 0% |
| Aug 11 | 82°F | 49°F | 99°F 1929 | 43°F 1932 | 14% | 0% |
| Aug 12 | 82°F | 48°F | 100°F 2001 | 40°F 1966 | 14% | 0% |
| Aug 13 | 82°F | 48°F | 100°F 1994 | 38°F 1974 | 14% | 0% |
| Aug 14 | 82°F | 48°F | 101°F 1992 | 39°F 1928 | 14% | 0% |
| Aug 15 | 81°F | 48°F | 100°F 1992 | 39°F 1960 | 14% | 0% |
| Aug 16 | 81°F | 48°F | 98°F 1931 | 39°F 1968 | 14% | 0% |
| Aug 17 | 81°F | 48°F | 96°F 1932 | 36°F 1987 | 14% | 0% |
| Aug 18 | 81°F | 48°F | 98°F 1931 | 37°F 1987 | 14% | 0% |
| Aug 19 | 80°F | 47°F | 101°F 1942 | 35°F 1980 | 14% | 0% |
| Aug 20 | 80°F | 47°F | 95°F 1977 | 38°F 1904 | 15% | 0% |
| Aug 21 | 80°F | 47°F | 98°F 2026 | 39°F 1966 | 15% | 0% |
| Aug 22 | 80°F | 47°F | 99°F 1961 | 37°F 1960 | 15% | 0% |
| Aug 23 | 79°F | 47°F | 102°F 1969 | 36°F 1992 | 15% | 0% |
| Aug 24 | 79°F | 47°F | 98°F 1966 | 29°F 1992 | 15% | 0% |
| Aug 25 | 79°F | 46°F | 98°F 2026 | 31°F 1992 | 15% | 0% |
| Aug 26 | 78°F | 46°F | 96°F 2001 | 38°F 1992 | 15% | 0% |
| Aug 27 | 78°F | 46°F | 98°F 1929 | 35°F 1976 | 15% | 0% |
| Aug 28 | 78°F | 46°F | 96°F 1998 | 35°F 1960 | 15% | 0% |
| Aug 29 | 78°F | 46°F | 98°F 1931 | 33°F 1980 | 15% | 0% |
| Aug 30 | 77°F | 45°F | 102°F 1929 | 34°F 1965 | 16% | 0% |
| Aug 31 | 77°F | 45°F | 97°F 1967 | 33°F 1977 | 16% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- August 1
- sunrise 5:28 AM, sunset 8:16 PM
- August 31
- sunrise 6:05 AM, sunset 7:26 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00106424 (Nezperce), public domain. Records: NOAA GHCN-Daily, station USC00103771, 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.