Hot-summer Mediterranean climate
Climate Saint Helena - California
Annual high74ºF
Annual low47ºF
Precipitation36.64 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 58 | 39 | 6.94 |
| Feb | 62 | 41 | 7.36 |
| Mar | 67 | 43 | 5.11 |
| Apr | 72 | 45 | 1.98 |
| May | 79 | 49 | 1.30 |
| Jun | 85 | 53 | 0.16 |
| Jul | 89 | 54 | 0.00 |
| Aug | 89 | 55 | 0.05 |
| Sep | 86 | 52 | 0.28 |
| Oct | 78 | 48 | 1.85 |
| Nov | 65 | 43 | 4.49 |
| Dec | 57 | 38 | 7.12 |
- JanHigh 58ºFLow 39ºFPrecip 6.94 inch
- FebHigh 62ºFLow 41ºFPrecip 7.36 inch
- MarHigh 67ºFLow 43ºFPrecip 5.11 inch
- AprHigh 72ºFLow 45ºFPrecip 1.98 inch
- MayHigh 79ºFLow 49ºFPrecip 1.30 inch
- JunHigh 85ºFLow 53ºFPrecip 0.16 inch
- JulHigh 89ºFLow 54ºFPrecip 0.00 inch
- AugHigh 89ºFLow 55ºFPrecip 0.05 inch
- SepHigh 86ºFLow 52ºFPrecip 0.28 inch
- OctHigh 78ºFLow 48ºFPrecip 1.85 inch
- NovHigh 65ºFLow 43ºFPrecip 4.49 inch
- DecHigh 57ºFLow 38ºFPrecip 7.12 inch
Climate summary
What is the average weather in Saint Helena, California?
Saint Helena experiences a hot-summer climate with dry summers and wetter winters. Summers are hot, while winters are cool and bring frequent rain or drizzle. This creates a strong seasonal contrast, making the area fairly wet overall due to abundant cooler-season precipitation.
Saint Helena weather averages
Annual high74ºF
Annual low47ºF
Precipitation36.64 inch
Daily normals Saint Helena - California - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 57.8 | 39.4 | 0.20 | 0.20 |
| Jan 2 | 57.8 | 39.4 | 0.40 | 0.40 |
| Jan 3 | 57.8 | 39.5 | 0.60 | 0.60 |
| Jan 4 | 57.9 | 39.5 | 0.80 | 0.80 |
| Jan 5 | 57.9 | 39.6 | 1.00 | 1.00 |
| Jan 6 | 58.0 | 39.6 | 1.20 | 1.20 |
| Jan 7 | 58.0 | 39.7 | 1.41 | 1.41 |
| Jan 8 | 58.1 | 39.7 | 1.62 | 1.62 |
| Jan 9 | 58.2 | 39.8 | 1.84 | 1.84 |
| Jan 10 | 58.2 | 39.8 | 2.06 | 2.06 |
| Jan 11 | 58.3 | 39.9 | 2.29 | 2.29 |
| Jan 12 | 58.4 | 40.0 | 2.51 | 2.51 |
| Jan 13 | 58.4 | 40.0 | 2.73 | 2.73 |
| Jan 14 | 58.5 | 40.1 | 2.95 | 2.95 |
| Jan 15 | 58.6 | 40.1 | 3.16 | 3.16 |
| Jan 16 | 58.7 | 40.2 | 3.37 | 3.37 |
| Jan 17 | 58.8 | 40.3 | 3.58 | 3.58 |
| Jan 18 | 58.8 | 40.3 | 3.78 | 3.78 |
| Jan 19 | 58.9 | 40.4 | 3.98 | 3.98 |
| Jan 20 | 59.0 | 40.4 | 4.18 | 4.18 |
| Jan 21 | 59.1 | 40.5 | 4.39 | 4.39 |
| Jan 22 | 59.2 | 40.6 | 4.59 | 4.59 |
| Jan 23 | 59.3 | 40.6 | 4.79 | 4.79 |
| Jan 24 | 59.5 | 40.7 | 5.00 | 5.00 |
| Jan 25 | 59.6 | 40.7 | 5.20 | 5.20 |
| Jan 26 | 59.7 | 40.8 | 5.42 | 5.42 |
| Jan 27 | 59.8 | 40.8 | 5.63 | 5.63 |
| Jan 28 | 59.9 | 40.9 | 5.83 | 5.83 |
| Jan 29 | 60.0 | 40.9 | 6.04 | 6.04 |
| Jan 30 | 60.2 | 41.0 | 6.25 | 6.25 |
| Jan 31 | 60.3 | 41.0 | 6.47 | 6.47 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Saint Helena - April 2023
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Apr 1 | 59.0 | 37.0 | 0.00 |
| Apr 2 | 63.0 | 36.0 | 0.00 |
| Apr 3 | 60.1 | 37.9 | 0.00 |
| Apr 4 | 64.0 | 35.1 | 0.00 |
| Apr 5 | 64.0 | 35.1 | 0.00 |
| Apr 6 | 63.0 | 39.0 | 0.00 |
| Apr 7 | 60.1 | 48.9 | 0.50 |
| Apr 8 | 66.9 | 45.0 | 0.00 |
| Apr 9 | 78.1 | 42.1 | 0.00 |
| Apr 10 | 78.1 | 46.9 | 0.00 |
| Apr 11 | 78.1 | 42.1 | 0.00 |
| Apr 12 | 78.1 | 42.1 | 0.00 |
| Apr 13 | 72.0 | 44.1 | 0.00 |
| Apr 14 | 69.1 | 39.0 | 0.00 |
| Apr 15 | 68.0 | 43.0 | 0.00 |
| Apr 16 | 71.1 | 39.9 | 0.00 |
| Apr 17 | 64.0 | 43.0 | 0.00 |
| Apr 18 | 61.0 | 39.0 | 0.00 |
| Apr 19 | 71.1 | 39.0 | 0.00 |
| Apr 20 | 77.0 | 39.0 | 0.00 |
| Apr 21 | 84.0 | 50.0 | 0.00 |
| Apr 22 | 84.9 | 54.0 | 0.00 |
| Apr 23 | 84.9 | 55.0 | 0.00 |
| Apr 24 | 82.9 | 50.0 | 0.00 |
| Apr 25 | 88.0 | 46.0 | 0.00 |
| Apr 26 | 89.1 | 46.9 | 0.00 |
| Apr 27 | 91.0 | 51.1 | 0.00 |
| Apr 28 | 90.0 | 52.0 | 0.00 |
| Apr 29 | 91.0 | 48.9 | 0.00 |
| Apr 30 | 77.0 | 46.0 | 0.00 |
The data for April 2023 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature91.0ºF · Apr 27
- Lowest max temperature59.0ºF · Apr 1
- Highest min temperature55.0ºF · Apr 23
- Lowest min temperature35.1ºF · Apr 4
Geo Saint Helena - California
Location
- Country
- United States
- State
- California
- County
- Napa
- City
- Saint Helena
- Zip Code
- 94574
- Elevation
- 246 ft
- Longitude
- -122.47
- Latitude
- 38.51
- ICAO
- –
- IATA
- –