Island County, WA
: September 2026 so far averaged 57.8°F in Island County, WA, the coldest 1 to 29 September in the county average since 2016, tied 29th coldest of 76 (with 2016 and 1951) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 59.9°F
- Coldest since 2023
- 18th coldest of 76
- Low
- 43.3°F
- Coldest since 2019
- 17th coldest of 76
- Precipitation
- 0.26 in
- Wettest since 2021
- 3rd wettest of 76
- Normal range, 43.2 to 52.2°F
Every year as a table
Every 29 September high of the county average in Island County, WA since 1951: 59.9°F in 2026; the highest is 77.3°F, in 2017.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 59.9 | 43.3 |
| 2025 | 72.6 | 53.1 |
| 2024 | 60.9 | 44 |
| 2023 | 56.3 | 45.4 |
| 2022 | 64.5 | 53.1 |
| 2021 | 59.8 | 50.2 |
| 2020 | 73.1 | 49 |
| 2019 | 58 | 43.2 |
| 2018 | 75.3 | 52.5 |
| 2017 | 77.3 | 51.9 |
| 2016 | 63.6 | 43.3 |
| 2015 | 66.6 | 41.5 |
| 2014 | 65 | 48.2 |
| 2013 | 58 | 48.5 |
| 2012 | 70.2 | 49.6 |
| 2011 | 65 | 43.7 |
| 2010 | 66.2 | 48.6 |
| 2009 | 61.6 | 41.4 |
| 2008 | 66.4 | 44.7 |
| 2007 | 58.4 | 43.2 |
| 2006 | 72.1 | 48.3 |
| 2005 | 65 | 46.1 |
| 2004 | 65.5 | 48.1 |
| 2003 | 76.9 | 52.2 |
| 2002 | 68.5 | 46.8 |
| 2001 | 65.8 | 46.4 |
| 2000 | 66.3 | 48.6 |
| 1999 | 68.6 | 42.9 |
| 1998 | 67.7 | 45.5 |
| 1997 | 66.1 | 53.7 |
| 1996 | 64.3 | 45.4 |
| 1995 | 63.1 | 50.3 |
| 1994 | 70.5 | 53 |
| 1993 | 68.3 | 46.2 |
| 1992 | 71.6 | 44.4 |
| 1991 | 61.8 | 48.7 |
| 1990 | 69.7 | 50.1 |
| 1989 | 70.9 | 48.1 |
| 1988 | 67.7 | 45.4 |
| 1987 | 67.3 | 42.9 |
| 1986 | 58.6 | 51.3 |
| 1985 | 69.6 | 37.8 |
| 1984 | 68 | 39.8 |
| 1983 | 58.7 | 36.5 |
| 1982 | 61.4 | 40.7 |
| 1981 | 58.7 | 46.8 |
| 1980 | 62.3 | 52.6 |
| 1979 | 65.7 | 46.2 |
| 1978 | 63.7 | 51.4 |
| 1977 | 55.5 | 47.2 |
| 1976 | 70.9 | 49.4 |
| 1975 | 62.9 | 44.6 |
| 1974 | 62.2 | 39.2 |
| 1973 | 73.6 | 48.2 |
| 1972 | 54.3 | 38.5 |
| 1971 | 54.5 | 42.6 |
| 1970 | 75.5 | 47.9 |
| 1969 | 60 | 50.1 |
| 1968 | 66.6 | 43.1 |
| 1967 | 70.6 | 51 |
| 1966 | 70.6 | 52.4 |
| 1965 | 58.3 | 43.6 |
| 1964 | 56.6 | 45.8 |
| 1963 | 71.3 | 52.8 |
| 1962 | 60.1 | 50.7 |
| 1961 | 55.4 | 40.4 |
| 1960 | 66.7 | 44.9 |
| 1959 | 60.9 | 44.7 |
| 1958 | 62.9 | 46.8 |
| 1957 | 73.2 | 47.7 |
| 1956 | 58.5 | 49 |
| 1955 | 58.7 | 45.7 |
| 1954 | 63.6 | 38.8 |
| 1953 | 57.5 | 46.7 |
| 1952 | 66.5 | 51 |
| 1951 | 60.6 | 52.6 |
The month
August 2026 averaged 64.9°F in Island County, WA, the warmest August in the county average since 2025, 9th warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 59.9°F averaged over Island County, WA, the coldest 29 September day in the county average since 2023, 18th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 43.3°F averaged over Island County, WA, the coldest 29 September night in the county average since 2019, tied 17th coldest of 76 (with 2016) (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: 0.26 in of precipitation averaged over Island County, WA, the wettest 29 September in the county average since 2021, tied 3rd wettest of 76 (with 2005) (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Seattle City, WA 37.8 mi, the nearest city with its own station