Coulee Dam Weather in October
Average highs run from 70°F on October 1 to 51°F on October 31, and lows from 46°F to 35°F. Normal precipitation for the month is 0.94 in over about 7 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 60°F
- Average low
- 40°F
- Precipitation
- 0.94 in
- Record high
- 90°FOct 2, 1935
- Record low
- 10°FOct 31, 1984
- Chance of a freeze
- 80%
- Daylight
- 11 h 40 min to 9 h 59 min
- Cloud cover
- 59%
- Humidity
- 67%
- Dew point
- 34°F
- Wind
- 6.0 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Oct 1 | 70°F | 46°F | 88°F 1935 | 33°F 1983 | 18% |
| Oct 2 | 69°F | 45°F | 90°F 1935 | 33°F 1986 | 19% |
| Oct 3 | 68°F | 45°F | 87°F 1935 | 34°F 1950 | 19% |
| Oct 4 | 68°F | 44°F | 84°F 1988 | 34°F 1977 | 19% |
| Oct 5 | 67°F | 44°F | 81°F 1980 | 31°F 2001 | 20% |
| Oct 6 | 67°F | 44°F | 83°F 1943 | 32°F 2000 | 20% |
| Oct 7 | 66°F | 43°F | 84°F 2014 | 32°F 1949 | 20% |
| Oct 8 | 65°F | 43°F | 82°F 1943 | 25°F 1985 | 21% |
| Oct 9 | 65°F | 43°F | 86°F 1936 | 28°F 1985 | 21% |
| Oct 10 | 64°F | 42°F | 87°F 1934 | 25°F 2019 | 22% |
| Oct 11 | 63°F | 42°F | 84°F 1934 | 21°F 2009 | 22% |
| Oct 12 | 63°F | 41°F | 81°F 1936 | 23°F 2009 | 23% |
| Oct 13 | 62°F | 41°F | 78°F 1939 | 28°F 2002 | 23% |
| Oct 14 | 62°F | 41°F | 74°F 1945 | 28°F 2017 | 24% |
| Oct 15 | 61°F | 40°F | 79°F 1963 | 30°F 1992 | 24% |
| Oct 16 | 60°F | 40°F | 75°F 1936 | 29°F 1999 | 24% |
| Oct 17 | 60°F | 40°F | 74°F 1936 | 23°F 1984 | 25% |
| Oct 18 | 59°F | 39°F | 76°F 1940 | 27°F 1984 | 25% |
| Oct 19 | 58°F | 39°F | 80°F 1940 | 25°F 1949 | 26% |
| Oct 20 | 58°F | 39°F | 75°F 2003 | 22°F 1985 | 26% |
| Oct 21 | 57°F | 38°F | 81°F 1939 | 27°F 1984 | 27% |
| Oct 22 | 56°F | 38°F | 78°F 1939 | 27°F 2020 | 27% |
| Oct 23 | 56°F | 38°F | 72°F 1936 | 22°F 1945 | 27% |
| Oct 24 | 55°F | 37°F | 74°F 1936 | 23°F 2002 | 28% |
| Oct 25 | 55°F | 37°F | 72°F 1937 | 23°F 2020 | 28% |
| Oct 26 | 54°F | 37°F | 72°F 1937 | 19°F 2002 | 29% |
| Oct 27 | 53°F | 36°F | 68°F 1936 | 23°F 2020 | 29% |
| Oct 28 | 53°F | 36°F | 72°F 2003 | 17°F 1991 | 30% |
| Oct 29 | 52°F | 36°F | 68°F 1987 | 19°F 2019 | 30% |
| Oct 30 | 51°F | 35°F | 67°F 2015 | 15°F 2002 | 30% |
| Oct 31 | 51°F | 35°F | 70°F 1967 | 10°F 1984 | 31% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 6:55 AM, sunset 6:35 PM
- October 31
- sunrise 7:40 AM, sunset 5:39 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00451767 (Coulee Dam 1 Sw), public domain. Records: NOAA GHCN-Daily, station USC00451767, 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.