Climate averages 1991–2020
San Jose weather
in July.
A hot, very dry month: the 2nd warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in San Jose: daytime highs average 28.1°C and nights cool to about 14.9°C. By daytime temperature it is the 2nd warmest of the 12 months.
Rain is very rare: less than 1 mm falls in a typical July (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 28 min on an average July day.
The nearest other city in this atlas is Milpitas (10 km away). In July its highs average 28.5°C, about as warm as San Jose, with almost no rain (under 1 mm).
Among the 498 cities listed in the United States, San Jose ranks joint 354th of 498 for the warmest July highs and joint 31st of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; San Jose is 2.2°C cooler than that mean.
From July to August, average highs rise by 0.3°C to 28.4°C, and monthly rainfall rises from under 1 mm to 1.0 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Jose climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.9°C6.2°C | 6.2°C | 129 | 9.1 | 9.910 h |
| February | 15.8°C7.1°C | 7.1°C | 135 | 9.5 | 10.811 h |
| March | 17.5°C8.3°C | 8.3°C | 100 | 9.3 | 11.912 h |
| April | 19.3°C9.1°C | 9.1°C | 46 | 5.6 | 13.113 h |
| May | 22.1°C10.9°C | 10.9°C | 22 | 3.4 | 14.214 h |
| June | 25.6°C12.9°C | 12.9°C | 3.9 | 1.0 | 14.715 h |
| July, selected | 28.1°C14.9°C | 14.9°C | 0.8 | 0.1 | 14.514 h |
| August | 28.4°C15.4°C | 15.4°C | 1.0 | 0.2 | 13.614 h |
| September | 27.8°C15.6°C | 15.6°C | 2.5 | 0.5 | 12.512 h |
| October | 24.1°C13.4°C | 13.4°C | 30 | 3.0 | 11.311 h |
| November | 18.3°C9.3°C | 9.3°C | 62 | 6.0 | 10.210 h |
| December | 14.5°C6.3°C | 6.3°C | 119 | 9.2 | 9.610 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Milpitas in JulyUnited States · 10 kmHigh 28.5°C · Low 15.3°C · 0.9 mm rain
- Sunnyvale in JulyUnited States · 13 kmHigh 26.9°C · Low 14.5°C · 0.8 mm rain
- Mountain View in JulyUnited States · 17 kmHigh 26.0°C · Low 14.4°C · 0.9 mm rain
- Fremont in JulyUnited States · 25 kmHigh 27.5°C · Low 14.8°C · 0.9 mm rain
- Union City in JulyUnited States · 31 kmHigh 27.9°C · Low 14.8°C · 0.9 mm rain
- Redwood City in JulyUnited States · 34 kmHigh 24.2°C · Low 13.9°C · 0.5 mm rain
- Pleasanton in JulyUnited States · 36 kmHigh 29.0°C · Low 14.7°C · 1.0 mm rain
- Livermore in JulyUnited States · 40 kmHigh 29.7°C · Low 14.7°C · 1.0 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Jose) is explained once on the San Jose year overview and on the Sources, method and limits page.
Sunnyvale lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.