Dry-summer warm continental climate
Climate Portola - California
Annual high62ºF
Annual low30ºF
Precipitation23.25 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 42 | 19 | 4.06 | 10 |
| Feb | 45 | 21 | 3.87 | 12 |
| Mar | 51 | 25 | 3.36 | 6 |
| Apr | 57 | 29 | 1.37 | 3 |
| May | 67 | 35 | 0.96 | 0 |
| Jun | 76 | 40 | 0.52 | 0 |
| Jul | 85 | 44 | 0.28 | 0 |
| Aug | 84 | 42 | 0.28 | 0 |
| Sep | 77 | 37 | 0.60 | 0 |
| Oct | 65 | 30 | 1.27 | 0 |
| Nov | 51 | 24 | 2.59 | 4 |
| Dec | 42 | 19 | 4.09 | 8 |
- JanHigh 42ºFLow 19ºFPrecip 4.06 inch
- FebHigh 45ºFLow 21ºFPrecip 3.87 inch
- MarHigh 51ºFLow 25ºFPrecip 3.36 inch
- AprHigh 57ºFLow 29ºFPrecip 1.37 inch
- MayHigh 67ºFLow 35ºFPrecip 0.96 inch
- JunHigh 76ºFLow 40ºFPrecip 0.52 inch
- JulHigh 85ºFLow 44ºFPrecip 0.28 inch
- AugHigh 84ºFLow 42ºFPrecip 0.28 inch
- SepHigh 77ºFLow 37ºFPrecip 0.60 inch
- OctHigh 65ºFLow 30ºFPrecip 1.27 inch
- NovHigh 51ºFLow 24ºFPrecip 2.59 inch
- DecHigh 42ºFLow 19ºFPrecip 4.09 inch
Climate summary
What is the average weather in Portola, California?
Portola experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm and dry, while winters are cold and bring significant snowfall. Most of the moderate annual precipitation arrives during the wetter winter months.
Portola weather averages
Annual high62ºF
Annual low30ºF
Precipitation23.25 inch
Snowfall43 inch
Daily normals Portola - California - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 41.4 | 18.3 | 0.13 | 0.13 | 0.40 | 0.40 |
| Jan 2 | 41.5 | 18.4 | 0.25 | 0.25 | 0.70 | 0.70 |
| Jan 3 | 41.7 | 18.4 | 0.38 | 0.38 | 1.10 | 1.10 |
| Jan 4 | 41.8 | 18.4 | 0.52 | 0.52 | 1.50 | 1.50 |
| Jan 5 | 41.9 | 18.5 | 0.65 | 0.65 | 1.90 | 1.90 |
| Jan 6 | 42.0 | 18.6 | 0.79 | 0.79 | 2.30 | 2.30 |
| Jan 7 | 42.1 | 18.6 | 0.93 | 0.93 | 2.70 | 2.70 |
| Jan 8 | 42.2 | 18.7 | 1.07 | 1.07 | 3.10 | 3.10 |
| Jan 9 | 42.3 | 18.7 | 1.21 | 1.21 | 3.60 | 3.60 |
| Jan 10 | 42.5 | 18.8 | 1.36 | 1.36 | 3.90 | 3.90 |
| Jan 11 | 42.6 | 18.9 | 1.51 | 1.51 | 4.30 | 4.30 |
| Jan 12 | 42.7 | 19.0 | 1.66 | 1.66 | 4.80 | 4.80 |
| Jan 13 | 42.8 | 19.1 | 1.81 | 1.81 | 5.20 | 5.20 |
| Jan 14 | 42.9 | 19.1 | 1.96 | 1.96 | 5.60 | 5.60 |
| Jan 15 | 43.0 | 19.2 | 2.10 | 2.10 | 6.00 | 6.00 |
| Jan 16 | 43.1 | 19.3 | 2.24 | 2.24 | 6.40 | 6.40 |
| Jan 17 | 43.2 | 19.4 | 2.37 | 2.37 | 6.80 | 6.80 |
| Jan 18 | 43.3 | 19.5 | 2.50 | 2.50 | 7.30 | 7.30 |
| Jan 19 | 43.4 | 19.5 | 2.62 | 2.62 | 7.70 | 7.70 |
| Jan 20 | 43.5 | 19.6 | 2.75 | 2.75 | 8.10 | 8.10 |
| Jan 21 | 43.6 | 19.7 | 2.89 | 2.89 | 8.50 | 8.50 |
| Jan 22 | 43.6 | 19.8 | 3.02 | 3.02 | 8.90 | 8.90 |
| Jan 23 | 43.7 | 19.8 | 3.14 | 3.14 | 9.30 | 9.30 |
| Jan 24 | 43.8 | 19.9 | 3.27 | 3.27 | 9.60 | 9.60 |
| Jan 25 | 43.9 | 20.0 | 3.39 | 3.39 | 10.00 | 10.00 |
| Jan 26 | 43.9 | 20.0 | 3.52 | 3.52 | 10.30 | 10.30 |
| Jan 27 | 44.0 | 20.1 | 3.65 | 3.65 | 10.60 | 10.60 |
| Jan 28 | 44.1 | 20.2 | 3.78 | 3.78 | 10.90 | 10.90 |
| Jan 29 | 44.1 | 20.2 | 3.91 | 3.91 | 11.10 | 11.10 |
| Jan 30 | 44.2 | 20.3 | 4.03 | 4.03 | 11.40 | 11.40 |
| Jan 31 | 44.3 | 20.3 | 4.16 | 4.16 | 11.70 | 11.70 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Portola - September 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Sep 1 | 82.0 | 46.9 | 0.00 |
| Sep 2 | 77.0 | 52.0 | 0.00 |
| Sep 3 | 71.1 | 55.9 | 0.00 |
| Sep 4 | 66.9 | 59.0 | 0.40 |
| Sep 5 | 73.0 | 51.1 | 0.00 |
| Sep 6 | – | – | 0.00 |
| Sep 7 | – | – | 0.00 |
| Sep 8 | – | – | 0.00 |
| Sep 9 | 88.0 | 44.1 | 0.00 |
| Sep 10 | 93.9 | 54.0 | 0.00 |
| Sep 11 | 87.1 | 51.1 | 0.00 |
| Sep 12 | 86.0 | 51.1 | 0.00 |
| Sep 13 | 87.1 | 53.1 | 0.00 |
| Sep 14 | 77.0 | 46.0 | 0.00 |
| Sep 15 | 81.0 | 46.9 | 0.00 |
| Sep 16 | 82.0 | 46.9 | 0.00 |
| Sep 17 | 78.1 | 46.9 | 0.00 |
| Sep 18 | 73.0 | 45.0 | 0.00 |
| Sep 19 | 78.1 | 46.9 | 0.00 |
| Sep 20 | 82.9 | 46.9 | 0.00 |
| Sep 21 | 86.0 | 50.0 | 0.00 |
| Sep 22 | – | – | 0.00 |
| Sep 23 | 84.9 | 48.0 | 0.00 |
| Sep 24 | – | – | 0.00 |
| Sep 25 | 86.0 | 35.1 | 0.00 |
| Sep 26 | 87.1 | 43.0 | 0.00 |
| Sep 27 | 88.0 | 37.0 | 0.00 |
| Sep 28 | 89.1 | 44.1 | 0.00 |
| Sep 29 | 91.0 | 39.0 | 0.00 |
| Sep 30 | 90.0 | 44.1 | 0.00 |
The data for September 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature93.9ºF · Sep 10
- Lowest max temperature66.9ºF · Sep 4
- Highest min temperature59.0ºF · Sep 4
- Lowest min temperature35.1ºF · Sep 25
Geo Portola - California
Location
- Country
- United States
- State
- California
- County
- –
- City
- Portola
- Zip Code
- 96122
- Elevation
- 4849 ft
- Longitude
- -120.47
- Latitude
- 39.81
- ICAO
- –
- IATA
- –