Grays Harbor County Weather in September
Average highs run from 70°F on September 1 to 63°F on September 30, and lows from 49°F to 44°F. Normal precipitation for the month is 4.56 in over about 10 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
- 67°F
- Average low
- 46°F
- Precipitation
- 4.56 in
- Record high
- 96°FSep 2, 1988
- Record low
- 32°FSep 27, 1972
- Chance of a freeze
- 6%
- Daylight
- 13 h 20 min to 11 h 43 min
- Cloud cover
- 51%
- Humidity
- 87%
- Dew point
- 53°F
- Wind
- 4.5 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 | 70°F | 49°F | 91°F 2006 | 43°F 1960 | 27% | 0% |
| Sep 2 | 69°F | 49°F | 96°F 1988 | 44°F 1959 | 27% | 0% |
| Sep 3 | 69°F | 48°F | 85°F 2020 | 41°F 1956 | 27% | 0% |
| Sep 4 | 69°F | 48°F | 90°F 2017 | 42°F 1956 | 28% | 0% |
| Sep 5 | 69°F | 48°F | 89°F 1955 | 40°F 1969 | 28% | 0% |
| Sep 6 | 69°F | 48°F | 87°F 2014 | 42°F 1960 | 29% | 0% |
| Sep 7 | 69°F | 48°F | 92°F 2012 | 42°F 1992 | 29% | 0% |
| Sep 8 | 69°F | 48°F | 86°F 1997 | 42°F 1960 | 29% | 0% |
| Sep 9 | 69°F | 48°F | 93°F 2020 | 43°F 1959 | 30% | 0% |
| Sep 10 | 68°F | 47°F | 91°F 2022 | 43°F 1972 | 30% | 0% |
| Sep 11 | 68°F | 47°F | 87°F 1975 | 42°F 1988 | 30% | 0% |
| Sep 12 | 68°F | 47°F | 91°F 1975 | 42°F 1955 | 31% | 0% |
| Sep 13 | 68°F | 47°F | 88°F 1957 | 38°F 1970 | 31% | 0% |
| Sep 14 | 68°F | 47°F | 90°F 1967 | 37°F 1969 | 32% | 0% |
| Sep 15 | 68°F | 47°F | 93°F 1967 | 37°F 1969 | 32% | 0% |
| Sep 16 | 67°F | 46°F | 88°F 2025 | 41°F 1965 | 33% | 0% |
| Sep 17 | 67°F | 46°F | 84°F 1991 | 39°F 1965 | 33% | 0% |
| Sep 18 | 67°F | 46°F | 81°F 1991 | 39°F 1978 | 34% | 0% |
| Sep 19 | 67°F | 46°F | 86°F 1976 | 40°F 1957 | 34% | 0% |
| Sep 20 | 66°F | 46°F | 90°F 1974 | 40°F 1968 | 35% | 0% |
| Sep 21 | 66°F | 45°F | 90°F 1974 | 35°F 1955 | 35% | 0% |
| Sep 22 | 66°F | 45°F | 88°F 1989 | 39°F 1955 | 36% | 0% |
| Sep 23 | 66°F | 45°F | 85°F 1974 | 38°F 2005 | 36% | 0% |
| Sep 24 | 65°F | 45°F | 85°F 1974 | 38°F 2005 | 37% | 0% |
| Sep 25 | 65°F | 45°F | 84°F 1991 | 36°F 1972 | 37% | 0% |
| Sep 26 | 65°F | 44°F | 83°F 1967 | 36°F 1972 | 38% | 0% |
| Sep 27 | 64°F | 44°F | 88°F 2003 | 32°F 1972 | 38% | 0% |
| Sep 28 | 64°F | 44°F | 85°F 1970 | 38°F 1983 | 39% | 0% |
| Sep 29 | 64°F | 44°F | 80°F 1957 | 37°F 1954 | 40% | 0% |
| Sep 30 | 63°F | 44°F | 85°F 1987 | 33°F 1971 | 40% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:35 AM, sunset 7:55 PM
- September 30
- sunrise 7:13 AM, sunset 6:56 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00453826 (Humptulips Salmon Hatchery), public domain. Records: NOAA GHCN-Daily, station USW00094225, 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.