Annual mean
Annual mean of daily highs
Annual mean of daily lows
American Canyon city, California
Official LSAD Designation: American Canyon city • Census GEOID: 0601640
• Napa County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for American Canyon city.
Reference Weather Station: NAPA CO AP, CA US (ID: USW00093227)
• Located 2.6 miles from community center
• Elevation: 4.3 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 56.9° | 38.2° | 47.6° | 4.17" |
| February | 60.9° | 40.0° | 50.4° | 3.95" |
| March | 64.2° | 41.7° | 53.0° | 3.01" |
| April | 68.1° | 43.5° | 55.8° | 1.26" |
| May | 73.1° | 47.8° | 60.5° | 0.80" |
| June | 78.3° | 51.8° | 65.1° | 0.22" |
| July | 78.7° | 54.8° | 66.7° | 0.01" |
| August | 80.0° | 54.4° | 67.2° | 0.02" |
| September | 80.3° | 51.0° | 65.7° | 0.07" |
| October | 75.4° | 45.9° | 60.6° | 0.93" |
| November | 65.1° | 40.4° | 52.7° | 1.97" |
| December | 57.3° | 37.6° | 47.5° | 3.82" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station NAPA CO AP, CA US (ID: USW00093227) • 2.6 miles from community center .
This is the same reference station used for monthly normals.
Source: NOAA NCEI Global Summary of the Year.
Annual temperature data table (°F)
| Year | Annual mean (°F) | Annual mean of daily highs (°F) | Annual mean of daily lows (°F) |
|---|---|---|---|
| 2010 | 56.0 | 67.4 | 44.5 |
| 2011 | 55.7 | 67.8 | 43.6 |
| 2012 | 57.0 | 69.9 | 44.2 |
| 2013 | 57.1 | 71.3 | 42.9 |
| 2014 | 58.7 | 71.4 | 46.0 |
| 2015 | 58.0 | 70.9 | 45.2 |
| 2016 | 58.3 | 70.3 | 46.3 |
| 2017 | 59.3 | 71.9 | 46.8 |
| 2018 | 57.1 | 70.0 | 44.2 |
| 2019 | 57.9 | 69.8 | 46.0 |
| 2020 | 59.1 | 72.8 | 45.4 |
| 2021 | 57.7 | 70.2 | 45.2 |
| 2022 | 58.0 | 71.6 | 44.5 |
| 2023 | 58.4 | 69.6 | 47.2 |
| 2024 | 58.7 | 70.6 | 46.7 |
| 2025 | 57.7 | 68.8 | 46.7 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.