Coos County Weather in September
Average highs run from 74°F on September 1 to 71°F on September 30, and lows from 50°F to 45°F. Normal precipitation for the month is 1.26 in over about 6 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
- 48°F
- Precipitation
- 1.26 in
- Record high
- 94°FSep 10, 1922
- Record low
- 30°FSep 25, 1908
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.6
- Daylight
- 13 h 10 min to 11 h 46 min
- Cloud cover
- 43%
- Humidity
- 65%
- Dew point
- 46°F
- Wind
- 4.0 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 | 74°F | 50°F | 81°F 1972 | 40°F 1924 | 16% | 0% |
| Sep 2 | 74°F | 50°F | 80°F 1973 | 40°F 1913 | 16% | 0% |
| Sep 3 | 74°F | 50°F | 91°F 1953 | 40°F 1921 | 17% | 0% |
| Sep 4 | 74°F | 50°F | 84°F 1973 | 37°F 1927 | 17% | 0% |
| Sep 5 | 74°F | 49°F | 93°F 2014 | 40°F 1902 | 17% | 0% |
| Sep 6 | 74°F | 49°F | 88°F 1981 | 39°F 1910 | 18% | 0% |
| Sep 7 | 74°F | 49°F | 88°F 1948 | 39°F 1910 | 18% | 0% |
| Sep 8 | 74°F | 49°F | 91°F 1902 | 40°F 1929 | 19% | 0% |
| Sep 9 | 74°F | 49°F | 88°F 2007 | 39°F 1913 | 19% | 0% |
| Sep 10 | 74°F | 49°F | 94°F 1922 | 40°F 1902 | 20% | 0% |
| Sep 11 | 74°F | 49°F | 91°F 1947 | 38°F 1910 | 20% | 0% |
| Sep 12 | 74°F | 48°F | 89°F 1988 | 33°F 1921 | 21% | 0% |
| Sep 13 | 74°F | 48°F | 90°F 1967 | 32°F 1921 | 21% | 0% |
| Sep 14 | 73°F | 48°F | 88°F 1952 | 33°F 1921 | 22% | 0% |
| Sep 15 | 73°F | 48°F | 78°F 1903 | 39°F 1927 | 22% | 0% |
| Sep 16 | 73°F | 48°F | 83°F 1971 | 37°F 1902 | 23% | 0% |
| Sep 17 | 73°F | 48°F | 89°F 1913 | 38°F 1908 | 24% | 0% |
| Sep 18 | 73°F | 47°F | 87°F 1971 | 38°F 1907 | 24% | 0% |
| Sep 19 | 73°F | 47°F | 90°F 1942 | 38°F 1928 | 25% | 0% |
| Sep 20 | 73°F | 47°F | 86°F 1939 | 39°F 1902 | 25% | 0% |
| Sep 21 | 73°F | 47°F | 93°F 2009 | 37°F 1929 | 26% | 0% |
| Sep 22 | 73°F | 47°F | 94°F 1919 | 38°F 1918 | 26% | 0% |
| Sep 23 | 72°F | 47°F | 90°F 1965 | 36°F 1918 | 27% | 0% |
| Sep 24 | 72°F | 46°F | 84°F 1913 | 31°F 1908 | 27% | 0% |
| Sep 25 | 72°F | 46°F | 83°F 1970 | 30°F 1908 | 28% | 0% |
| Sep 26 | 72°F | 46°F | 91°F 1918 | 36°F 1924 | 28% | 0% |
| Sep 27 | 72°F | 46°F | 88°F 1936 | 34°F 1908 | 29% | 0% |
| Sep 28 | 71°F | 46°F | 94°F 2020 | 34°F 1929 | 30% | 0% |
| Sep 29 | 71°F | 45°F | 82°F 1947 | 34°F 1902 | 30% | 0% |
| Sep 30 | 71°F | 45°F | 81°F 1923 | 34°F 1919 | 31% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:41 AM, sunset 7:51 PM
- September 30
- sunrise 7:13 AM, sunset 6:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00351836 (Coquille City), public domain. Records: NOAA GHCN-Daily, station USW00024284, 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.