Columbia County Weather in September
Average highs run from 76°F on September 1 to 68°F on September 30, and lows from 45°F to 41°F. Normal precipitation for the month is 1.79 in over about 8 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 73°F
- Average low
- 43°F
- Precipitation
- 1.79 in
- Record high
- 104°FSep 5, 1944
- Record low
- 29°FSep 24, 1926
- Chance of a freeze
- 46%
- Days of 90°F or more
- 1.2
- Daylight
- 13 h 17 min to 11 h 44 min
- Cloud cover
- 51%
- Humidity
- 80%
- Dew point
- 51°F
- Wind
- 3.8 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 |
|---|---|---|---|---|---|---|
| Sep 1 | 76°F | 45°F | 99°F 1987 | 39°F 1973 | 19% | 0% |
| Sep 2 | 76°F | 45°F | 96°F 2017 | 39°F 1932 | 19% | 0% |
| Sep 3 | 76°F | 45°F | 100°F 1988 | 37°F 1932 | 20% | 0% |
| Sep 4 | 76°F | 45°F | 98°F 2003 | 41°F 1929 | 20% | 0% |
| Sep 5 | 76°F | 45°F | 104°F 1944 | 40°F 1947 | 21% | 0% |
| Sep 6 | 76°F | 44°F | 97°F 2024 | 34°F 1929 | 22% | 0% |
| Sep 7 | 75°F | 44°F | 95°F 1935 | 35°F 1929 | 22% | 0% |
| Sep 8 | 75°F | 44°F | 100°F 1981 | 36°F 1929 | 23% | 0% |
| Sep 9 | 75°F | 44°F | 91°F 1999 | 38°F 1936 | 23% | 0% |
| Sep 10 | 75°F | 44°F | 98°F 1944 | 36°F 1936 | 24% | 0% |
| Sep 11 | 75°F | 44°F | 91°F 1948 | 32°F 1936 | 24% | 0% |
| Sep 12 | 74°F | 44°F | 90°F 1929 | 37°F 1932 | 25% | 0% |
| Sep 13 | 74°F | 43°F | 93°F 1999 | 34°F 1970 | 25% | 0% |
| Sep 14 | 74°F | 43°F | 94°F 1937 | 34°F 1970 | 26% | 0% |
| Sep 15 | 74°F | 43°F | 93°F 1979 | 34°F 1936 | 27% | 0% |
| Sep 16 | 73°F | 43°F | 97°F 1967 | 36°F 2021 | 27% | 0% |
| Sep 17 | 73°F | 43°F | 91°F 2025 | 33°F 1965 | 28% | 0% |
| Sep 18 | 73°F | 43°F | 87°F 1952 | 33°F 1942 | 28% | 0% |
| Sep 19 | 73°F | 42°F | 89°F 1991 | 30°F 1928 | 29% | 0% |
| Sep 20 | 72°F | 42°F | 93°F 1952 | 37°F 1947 | 29% | 0% |
| Sep 21 | 72°F | 42°F | 95°F 1952 | 33°F 1937 | 30% | 0% |
| Sep 22 | 72°F | 42°F | 94°F 1950 | 34°F 1932 | 30% | 0% |
| Sep 23 | 71°F | 42°F | 94°F 1990 | 34°F 1931 | 31% | 0% |
| Sep 24 | 71°F | 42°F | 93°F 1943 | 29°F 1926 | 32% | 0% |
| Sep 25 | 70°F | 41°F | 90°F 1974 | 30°F 1926 | 32% | 0% |
| Sep 26 | 70°F | 41°F | 91°F 1991 | 29°F 1926 | 33% | 0% |
| Sep 27 | 70°F | 41°F | 88°F 2000 | 32°F 1926 | 33% | 0% |
| Sep 28 | 69°F | 41°F | 90°F 1967 | 32°F 1929 | 34% | 0% |
| Sep 29 | 69°F | 41°F | 86°F 2017 | 32°F 1930 | 35% | 0% |
| Sep 30 | 68°F | 41°F | 87°F 1993 | 32°F 1950 | 36% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:33 AM, sunset 7:50 PM
- September 30
- sunrise 7:10 AM, sunset 6:54 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00358884 (Vernonia #2), public domain. Records: NOAA GHCN-Daily, station USC00454769, 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.