Warm-summer Mediterranean climate
Climate Mount Hamilton - California
Annual high61ºF
Annual low48ºF
Precipitation26.13 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 49 | 38 | 4.68 | 3 |
| Feb | 48 | 38 | 4.46 | 5 |
| Mar | 50 | 39 | 4.04 | 5 |
| Apr | 55 | 41 | 1.99 | 1 |
| May | 63 | 48 | 1.11 | 0 |
| Jun | 71 | 56 | 0.26 | 0 |
| Jul | 78 | 65 | 0.01 | 0 |
| Aug | 77 | 64 | 0.06 | 0 |
| Sep | 73 | 59 | 0.38 | 0 |
| Oct | 65 | 52 | 1.42 | 0 |
| Nov | 53 | 42 | 3.57 | 0 |
| Dec | 48 | 38 | 4.15 | 3 |
- JanHigh 49ºFLow 38ºFPrecip 4.68 inch
- FebHigh 48ºFLow 38ºFPrecip 4.46 inch
- MarHigh 50ºFLow 39ºFPrecip 4.04 inch
- AprHigh 55ºFLow 41ºFPrecip 1.99 inch
- MayHigh 63ºFLow 48ºFPrecip 1.11 inch
- JunHigh 71ºFLow 56ºFPrecip 0.26 inch
- JulHigh 78ºFLow 65ºFPrecip 0.01 inch
- AugHigh 77ºFLow 64ºFPrecip 0.06 inch
- SepHigh 73ºFLow 59ºFPrecip 0.38 inch
- OctHigh 65ºFLow 52ºFPrecip 1.42 inch
- NovHigh 53ºFLow 42ºFPrecip 3.57 inch
- DecHigh 48ºFLow 38ºFPrecip 4.15 inch
Climate summary
What is the average weather in Mount Hamilton, California?
Mount Hamilton experiences a warm-summer climate with dry summers and wetter winters. Winters are cool and bring regular snowfall, while summers are warm. Precipitation is moderate overall, with frequent rain or drizzle common during the cooler season.
Mount Hamilton weather averages
Annual high61ºF
Annual low48ºF
Precipitation26.13 inch
Snowfall17 inch
Daily normals Mount Hamilton - California - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 49.3 | 38.9 | 0.14 | 0.14 | 0.10 | 0.10 |
| Jan 2 | 49.4 | 39.0 | 0.28 | 0.28 | 0.10 | 0.10 |
| Jan 3 | 49.5 | 39.0 | 0.42 | 0.42 | 0.20 | 0.20 |
| Jan 4 | 49.5 | 39.1 | 0.57 | 0.57 | 0.30 | 0.30 |
| Jan 5 | 49.6 | 39.2 | 0.72 | 0.72 | 0.40 | 0.40 |
| Jan 6 | 49.7 | 39.3 | 0.87 | 0.87 | 0.50 | 0.50 |
| Jan 7 | 49.7 | 39.3 | 1.02 | 1.02 | 0.60 | 0.60 |
| Jan 8 | 49.8 | 39.4 | 1.19 | 1.19 | 0.70 | 0.70 |
| Jan 9 | 49.8 | 39.4 | 1.35 | 1.35 | 0.80 | 0.80 |
| Jan 10 | 49.9 | 39.5 | 1.52 | 1.52 | 0.90 | 0.90 |
| Jan 11 | 49.9 | 39.5 | 1.70 | 1.70 | 1.10 | 1.10 |
| Jan 12 | 49.9 | 39.5 | 1.88 | 1.88 | 1.20 | 1.20 |
| Jan 13 | 49.9 | 39.5 | 2.06 | 2.06 | 1.40 | 1.40 |
| Jan 14 | 49.9 | 39.5 | 2.23 | 2.23 | 1.50 | 1.50 |
| Jan 15 | 49.9 | 39.5 | 2.40 | 2.40 | 1.70 | 1.70 |
| Jan 16 | 49.9 | 39.4 | 2.57 | 2.57 | 1.90 | 1.90 |
| Jan 17 | 49.9 | 39.4 | 2.74 | 2.74 | 2.00 | 2.00 |
| Jan 18 | 49.8 | 39.3 | 2.90 | 2.90 | 2.20 | 2.20 |
| Jan 19 | 49.8 | 39.3 | 3.07 | 3.07 | 2.40 | 2.40 |
| Jan 20 | 49.7 | 39.2 | 3.23 | 3.23 | 2.50 | 2.50 |
| Jan 21 | 49.7 | 39.2 | 3.39 | 3.39 | 2.70 | 2.70 |
| Jan 22 | 49.6 | 39.1 | 3.55 | 3.55 | 2.80 | 2.80 |
| Jan 23 | 49.6 | 39.0 | 3.71 | 3.71 | 3.00 | 3.00 |
| Jan 24 | 49.5 | 38.9 | 3.87 | 3.87 | 3.10 | 3.10 |
| Jan 25 | 49.4 | 38.8 | 4.03 | 4.03 | 3.30 | 3.30 |
| Jan 26 | 49.4 | 38.7 | 4.20 | 4.20 | 3.40 | 3.40 |
| Jan 27 | 49.3 | 38.6 | 4.36 | 4.36 | 3.60 | 3.60 |
| Jan 28 | 49.2 | 38.5 | 4.53 | 4.53 | 3.70 | 3.70 |
| Jan 29 | 49.1 | 38.5 | 4.70 | 4.70 | 3.90 | 3.90 |
| Jan 30 | 49.0 | 38.4 | 4.86 | 4.86 | 4.00 | 4.00 |
| Jan 31 | 49.0 | 38.3 | 5.03 | 5.03 | 4.20 | 4.20 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Mount Hamilton - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 82.9 | 71.1 | 0.00 |
| Oct 2 | 82.9 | 70.0 | 0.00 |
| Oct 3 | – | – | – |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | 84.9 | 73.0 | 0.00 |
| Oct 7 | 84.0 | 73.0 | 0.00 |
| Oct 8 | 82.9 | 73.0 | 0.00 |
| Oct 9 | 82.0 | 64.9 | 0.00 |
| Oct 10 | 66.0 | 50.0 | 0.00 |
| Oct 11 | 55.9 | 42.1 | 0.00 |
| Oct 12 | 54.0 | 39.0 | 0.00 |
| Oct 13 | 57.0 | 43.0 | 0.00 |
| Oct 14 | 66.9 | 54.0 | 0.00 |
| Oct 15 | 75.0 | 57.9 | 0.00 |
| Oct 16 | – | – | – |
| Oct 17 | 77.0 | 66.0 | 0.00 |
| Oct 18 | – | – | – |
| Oct 19 | – | – | – |
| Oct 20 | 63.0 | 42.1 | 0.00 |
| Oct 21 | 54.0 | 46.0 | 0.00 |
| Oct 22 | 48.0 | 45.0 | 0.05 |
| Oct 23 | 48.9 | 43.0 | 0.38 |
| Oct 24 | 61.0 | 46.0 | 0.00 |
| Oct 25 | 63.0 | 50.0 | 0.00 |
| Oct 26 | – | – | – |
| Oct 27 | 51.1 | 30.9 | 0.00 |
| Oct 28 | 55.0 | 39.9 | 0.00 |
| Oct 29 | 55.9 | 45.0 | 0.00 |
| Oct 30 | 53.1 | 42.1 | 0.00 |
| Oct 31 | 52.0 | 39.9 | 0.00 |
The data for October 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 temperature84.9ºF · Oct 6
- Lowest max temperature48.0ºF · Oct 22
- Highest min temperature73.0ºF · Oct 6
- Lowest min temperature30.9ºF · Oct 27
Geo Mount Hamilton - California
Location
- Country
- United States
- State
- California
- County
- –
- City
- Mount Hamilton
- Zip Code
- 95127
- Elevation
- 4196 ft
- Longitude
- -121.64
- Latitude
- 37.34
- ICAO
- –
- IATA
- –