Mason County, WA
: September 2026 so far averaged 56.6°F in Mason County, WA, the coldest 1 to 29 September in the county average since 2015, tied 19th coldest of 76 (with 2004 and 1968) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 63.3°F
- Coldest since 2024
- 31st coldest of 76
- Low
- 41.8°F
- Coldest since 2019
- 16th coldest of 76
- Precipitation
- 0.38 in
- Wettest since 2021
- 12th wettest of 76
- Normal range, 39.8 to 50.4°F
Every year as a table
Every 29 September high of the county average in Mason County, WA since 1951: 63.3°F in 2026; the highest is 78.4°F, in 2017.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 63.3 | 41.8 |
| 2025 | 69 | 50.2 |
| 2024 | 62 | 42 |
| 2023 | 59.1 | 42.2 |
| 2022 | 64.5 | 51.7 |
| 2021 | 56.1 | 47.2 |
| 2020 | 74 | 47.3 |
| 2019 | 53.6 | 38.6 |
| 2018 | 73.7 | 50.1 |
| 2017 | 78.4 | 52.1 |
| 2016 | 66.8 | 42.5 |
| 2015 | 69.7 | 39.8 |
| 2014 | 66.3 | 46.5 |
| 2013 | 56 | 46.3 |
| 2012 | 71.6 | 49 |
| 2011 | 65.2 | 39.8 |
| 2010 | 66.5 | 49.3 |
| 2009 | 60.6 | 39.3 |
| 2008 | 71.5 | 43.2 |
| 2007 | 55.7 | 40.9 |
| 2006 | 77.7 | 48.5 |
| 2005 | 67.3 | 44.5 |
| 2004 | 69.3 | 47.2 |
| 2003 | 78.3 | 53.6 |
| 2002 | 68.8 | 44.3 |
| 2001 | 62.9 | 42.8 |
| 2000 | 63.7 | 50 |
| 1999 | 68.2 | 38 |
| 1998 | 71.3 | 43.9 |
| 1997 | 67.4 | 50.3 |
| 1996 | 69.9 | 48.3 |
| 1995 | 61.4 | 48.6 |
| 1994 | 72.2 | 51.3 |
| 1993 | 76.5 | 47.7 |
| 1992 | 76.1 | 44 |
| 1991 | 64.2 | 46.4 |
| 1990 | 71.9 | 49.2 |
| 1989 | 74 | 47.9 |
| 1988 | 70.7 | 43.6 |
| 1987 | 73.2 | 42.4 |
| 1986 | 57 | 48.8 |
| 1985 | 67.8 | 37.8 |
| 1984 | 69.1 | 39.3 |
| 1983 | 59.8 | 34.8 |
| 1982 | 58.4 | 37.3 |
| 1981 | 57.3 | 46.2 |
| 1980 | 63.1 | 52.2 |
| 1979 | 64.2 | 43 |
| 1978 | 64.2 | 51.7 |
| 1977 | 57.1 | 44.8 |
| 1976 | 70.3 | 51.2 |
| 1975 | 60.9 | 43.6 |
| 1974 | 63.2 | 38.1 |
| 1973 | 75 | 47.2 |
| 1972 | 51 | 41.9 |
| 1971 | 50.2 | 40.2 |
| 1970 | 76.5 | 46.2 |
| 1969 | 61.8 | 50.5 |
| 1968 | 67.4 | 43.3 |
| 1967 | 73.3 | 52.4 |
| 1966 | 71.2 | 50.9 |
| 1965 | 58.5 | 43.9 |
| 1964 | 58.2 | 45 |
| 1963 | 73.4 | 50.7 |
| 1962 | 56.5 | 46.8 |
| 1961 | 55.2 | 37.7 |
| 1960 | 72 | 42.1 |
| 1959 | 58 | 41.3 |
| 1958 | 66.3 | 45.4 |
| 1957 | 73.2 | 47.6 |
| 1956 | 58.2 | 47.6 |
| 1955 | 56.9 | 42.5 |
| 1954 | 61.8 | 37.3 |
| 1953 | 56.8 | 44.6 |
| 1952 | 68.9 | 49.5 |
| 1951 | 56.1 | 50.5 |
The month
August 2026 averaged 64.2°F in Mason County, WA, the warmest August in the county average since 2025, tied 22nd warmest of 132 (with 1990 and 1923) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 63.3°F averaged over Mason County, WA, the coldest 29 September day in the county average since 2024, 31st coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 41.8°F averaged over Mason County, WA, the coldest 29 September night in the county average since 2019, 16th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: 0.38 in of precipitation averaged over Mason County, WA, the wettest 29 September in the county average since 2021, 12th wettest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Olympia, WA 28.9 mi, the nearest city with its own station