Average annual temperature in Napa County

Average annual temperature in Napa County was 60.3 °F in 2025, according to NOAA National Centers for Environmental Information. That is down 1.3% from 2024. That is the 24th highest of 58 counties in 2025.

2025, °F60.3

Change on 2024-1.3%

Rank24th of 58Counties in California ranked

Series high622014

Series low57.11982

Next release: Wednesday, 6 October 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Average annual temperature in Napa County, 1950 to 2025

°F. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12, published 2026-10-06.

All 76 values

Period	°F
2025	60.3
2024	61.1
2023	59.1
2022	60.6
2021	60.6
2020	61.9
2019	60
2018	60.4
2017	60.8
2016	60.4
2015	61.6
2014	62
2013	60.1
2012	59.5
2011	58.2
2010	58.4
2009	59.4
2008	59.6
2007	59.4
2006	59.1
2005	59.4
2004	60.1
2003	59.9
2002	59.5
2001	60.1
2000	59.3
1999	58.5
1998	58
1997	60.7
1996	60.5
1995	59.8
1994	58.2
1993	58.8
1992	60.2
1991	59
1990	58.9
1989	58.3
1988	59.8
1987	59.2
1986	59.6
1985	58.1
1984	59.4
1983	58.7
1982	57.1
1981	60
1980	58.2
1979	58.8
1978	59
1977	58.7
1976	58.8
1975	57.2
1974	58.2
1973	58.6
1972	57.8
1971	57.3
1970	59
1969	58.3
1968	58.6
1967	58.4
1966	58.8
1965	57.5
1964	57.9
1963	57.5
1962	58
1961	58.6
1960	58.7
1959	60
1958	60
1957	58
1956	57.7
1955	57.2
1954	57.5
1953	58
1952	57.6
1951	57.5
1950	58.4

Compared with California and United States

Place	2025
Napa County	60.3
California	60.4
United States	54.6

Napa County compared with nearby places

Under 55
55 to 57
57 to 60
60 to 62
62 to 63
63 and over

Average annual temperature, 2025, °F. Napa County is outlined. Same source and period for every area shown. Source: NOAA National Centers for Environmental Information. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

US states by average annual temperature 50 places
Counties in California by average annual temperature 58 places

Definition

Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.

Values are area averages, so a county with mountains and valleys has one value for very different local climates. NOAA revises the last two years every month.

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How to cite

NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December average temperature, counties (Average annual temperature, Napa County, 1950 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December average temperature, counties, Average annual temperature, Napa County, 1950 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/en/average-annual-temperature/napa-county-california. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December average temperature, counties. Average annual temperature, Napa County, 1950 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/en/average-annual-temperature/napa-county-california.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December average temperature, counties, Average annual temperature, Napa County, 1950 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/en/average-annual-temperature/napa-county-california (Accessed: 12 October 2026).

BibTeX

@misc{noaa_average_annual_temperature_napa_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December average temperature, counties: Average annual temperature, Napa County, 1950 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/average-annual-temperature/napa-county-california. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December average temperature, counties: Average annual temperature, Napa County, 1950 to 2025
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/en/average-annual-temperature/napa-county-california
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/average-annual-temperature/napa-county-california.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
ER  -

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Questions

What is the average annual temperature in Napa County?

Where does this figure come from?

NOAA National Centers for Environmental Information. NOAA Climate at a Glance, January to December average temperature, counties. Retrieved by Invokely on 2026-10-12.

What was the highest average annual temperature in Napa County?

62 °F in 2014, the highest value since 1950 in this series.

Related statistics for Napa County

All statistics for Napa County | Napa County in figures