Siskiyou County, CA
: September 2026 so far averaged 56.4°F in Siskiyou County, CA, the coldest 1 to 29 September in the county average since 1986, 4th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 70.4°F
- Coldest since 2023
- 28th coldest of 76
- Low
- 39°F
- Coldest since 2023
- 16th coldest of 76
No measurable precipitation in the county average of Siskiyou County, CA for 4 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 38 to 51.8°F
Every year as a table
Every 29 September high of the county average in Siskiyou County, CA since 1951: 70.4°F in 2026; the highest is 88.2°F, in 2003.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 70.4 | 39 |
| 2025 | 71.2 | 49.4 |
| 2024 | 83.7 | 51.7 |
| 2023 | 64.5 | 36.3 |
| 2022 | 68.6 | 42.8 |
| 2021 | 53 | 32.3 |
| 2020 | 84.1 | 50.1 |
| 2019 | 47.1 | 31.4 |
| 2018 | 83.7 | 51.4 |
| 2017 | 77.4 | 48.1 |
| 2016 | 83.2 | 51.4 |
| 2015 | 79.6 | 48.4 |
| 2014 | 64.1 | 44.2 |
| 2013 | 61.8 | 42.4 |
| 2012 | 81.8 | 51.8 |
| 2011 | 80.3 | 44.5 |
| 2010 | 86.9 | 52.9 |
| 2009 | 75.9 | 38.2 |
| 2008 | 85.8 | 49.9 |
| 2007 | 53.6 | 30.5 |
| 2006 | 84.2 | 49.4 |
| 2005 | 80.5 | 45.4 |
| 2004 | 80.6 | 46.1 |
| 2003 | 88.2 | 51.8 |
| 2002 | 71 | 39.3 |
| 2001 | 65.9 | 38 |
| 2000 | 74.9 | 45.8 |
| 1999 | 73.2 | 40.5 |
| 1998 | 72.3 | 42 |
| 1997 | 77.9 | 46 |
| 1996 | 85.2 | 52.6 |
| 1995 | 55 | 37.9 |
| 1994 | 67.9 | 44.2 |
| 1993 | 82.4 | 49.3 |
| 1992 | 85.4 | 49.7 |
| 1991 | 79.3 | 47.9 |
| 1990 | 79 | 51.1 |
| 1989 | 74.9 | 47.5 |
| 1988 | 76.8 | 41.8 |
| 1987 | 82.1 | 45 |
| 1986 | 57.6 | 34.7 |
| 1985 | 73 | 42.2 |
| 1984 | 75.8 | 41.6 |
| 1983 | 67.1 | 39.6 |
| 1982 | 56.6 | 37.3 |
| 1981 | 55.1 | 38.8 |
| 1980 | 76.2 | 44 |
| 1979 | 76.1 | 47.3 |
| 1978 | 72.8 | 41.8 |
| 1977 | 58.8 | 49.6 |
| 1976 | 70.5 | 51.4 |
| 1975 | 76.1 | 42.3 |
| 1974 | 77.1 | 40.5 |
| 1973 | 78.8 | 45.8 |
| 1972 | 63.1 | 39.7 |
| 1971 | 49.5 | 40.3 |
| 1970 | 80.2 | 44.7 |
| 1969 | 74.7 | 47.2 |
| 1968 | 76.2 | 42.9 |
| 1967 | 85.1 | 50.8 |
| 1966 | 84.3 | 48.1 |
| 1965 | 62.8 | 36.2 |
| 1964 | 74.9 | 40.4 |
| 1963 | 83 | 47.9 |
| 1962 | 52.8 | 39.9 |
| 1961 | 64 | 32.4 |
| 1960 | 80 | 47.7 |
| 1959 | 56.4 | 35.8 |
| 1958 | 82.4 | 48.6 |
| 1957 | 55 | 46 |
| 1956 | 70.3 | 41.9 |
| 1955 | 65.8 | 37.9 |
| 1954 | 63.2 | 34.7 |
| 1953 | 63.9 | 39.2 |
| 1952 | 81.2 | 46.7 |
| 1951 | 60.2 | 49.6 |
The month
August 2026 averaged 70.6°F in Siskiyou County, CA, the warmest August in the county average since 2022, 3rd 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 70.4°F averaged over Siskiyou County, CA, the coldest 29 September day in the county average since 2023, 28th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 39°F averaged over Siskiyou County, CA, the coldest 29 September night in the county average since 2023, 16th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Mount Shasta, CA 21.9 mi, the nearest city with its own station