Napa County, CA
An ordinary day in Napa County, CA: was cooler than 30 of 75 earlier years in the county average (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 85.4°F
- Warmest since 2024
- 31st warmest of 76
- Low
- 49.1°F
- Coldest since 2021
- 16th coldest of 76
No measurable precipitation in the county average of Napa County, CA for 25 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 49.1 to 58.8°F
Every year as a table
Every 29 September high of the county average in Napa County, CA since 1951: 85.4°F in 2026; the highest is 100°F, in 2010.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 85.4 | 49.1 |
| 2025 | 70.3 | 56.3 |
| 2024 | 88.5 | 52.7 |
| 2023 | 80.4 | 53.6 |
| 2022 | 82.8 | 54.1 |
| 2021 | 77.6 | 47.7 |
| 2020 | 95.5 | 63.1 |
| 2019 | 69.5 | 42.3 |
| 2018 | 78.8 | 49.7 |
| 2017 | 88.3 | 54.9 |
| 2016 | 88 | 54.4 |
| 2015 | 83.9 | 51 |
| 2014 | 73 | 51.1 |
| 2013 | 81.7 | 52.5 |
| 2012 | 86.6 | 53.6 |
| 2011 | 92.6 | 59.8 |
| 2010 | 100 | 63.5 |
| 2009 | 83.5 | 50.3 |
| 2008 | 91.3 | 55.1 |
| 2007 | 69.2 | 44.7 |
| 2006 | 81.3 | 51.3 |
| 2005 | 92.9 | 55.4 |
| 2004 | 75.6 | 49.3 |
| 2003 | 81.9 | 51.1 |
| 2002 | 72.9 | 47.2 |
| 2001 | 81.8 | 50.1 |
| 2000 | 77.5 | 49.3 |
| 1999 | 89.7 | 56.5 |
| 1998 | 74.2 | 50.8 |
| 1997 | 92.6 | 58.7 |
| 1996 | 86.5 | 54.4 |
| 1995 | 74.6 | 49.4 |
| 1994 | 78.1 | 52.7 |
| 1993 | 91.4 | 56.7 |
| 1992 | 92.6 | 57.2 |
| 1991 | 89.4 | 54.3 |
| 1990 | 91.5 | 56.8 |
| 1989 | 74.1 | 54.2 |
| 1988 | 91.2 | 53.7 |
| 1987 | 92 | 55.2 |
| 1986 | 75.2 | 47 |
| 1985 | 73.9 | 50 |
| 1984 | 87.2 | 53.6 |
| 1983 | 76.7 | 53.2 |
| 1982 | 74.9 | 48.7 |
| 1981 | 73.1 | 49.9 |
| 1980 | 87.4 | 51 |
| 1979 | 86.6 | 51.9 |
| 1978 | 91.3 | 55.7 |
| 1977 | 68.8 | 56.9 |
| 1976 | 69 | 55 |
| 1975 | 81.7 | 49 |
| 1974 | 80.4 | 48.2 |
| 1973 | 91.4 | 52.8 |
| 1972 | 80.7 | 52.8 |
| 1971 | 68.3 | 47.3 |
| 1970 | 92 | 54.1 |
| 1969 | 85.8 | 56.6 |
| 1968 | 85.1 | 53.3 |
| 1967 | 82.8 | 58.1 |
| 1966 | 97 | 60.3 |
| 1965 | 77.7 | 45.7 |
| 1964 | 75.1 | 45.6 |
| 1963 | 91.8 | 57.7 |
| 1962 | 72.1 | 50.7 |
| 1961 | 80.6 | 46.7 |
| 1960 | 79.9 | 51.4 |
| 1959 | 76.5 | 56.2 |
| 1958 | 93.7 | 55.6 |
| 1957 | 67.9 | 53.5 |
| 1956 | 89.9 | 52.9 |
| 1955 | 77.2 | 43.2 |
| 1954 | 79.1 | 49 |
| 1953 | 78.9 | 48.5 |
| 1952 | 90.6 | 52.3 |
| 1951 | 71 | 54.1 |
The month
September 2026 so far averaged 68°F in Napa County, CA, the coldest 1 to 29 September in the county average since 2023, 17th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month in words
- August 2026 averaged 72.9°F in Napa County, CA, the warmest August in the county average since 2025, tied 23rd warmest of 132 (with 1990 and 1983) (county average from NOAA's monthly county data, 1895 to 2026).
- Tuesday 29 September 2026: a high of 85.4°F averaged over Napa County, CA, the warmest 29 September in the county average since 2024, 31st warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 49.1°F averaged over Napa County, CA, the coldest 29 September night in the county average since 2021, 16th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Sacramento, CA 44.9 mi, the nearest city with its own station