San Jose, California Climate by Month
San Jose, California, United States
Warm summers and mild winters, with most rain from November to March.
San Jose has warm summers and mild winters, with most rain from November to March. Afternoon highs range from 62°F (17°C) in January to 85°F (29°C) in August, and December nights average 42°F (6°C). Of the 15 in (386 mm) of rain in a typical year, 82% falls from November to March. May to September are almost completely dry.
- Warmest month
- 85°F(29°C)
- Average high, August
- Coldest nights
- 42°F(6°C)
- Average low, December
- Rain per year
- 15 in(386 mm)
- Wettest: January
- Humidity
- 62%
- Sunniest: June
Best and worst months in San Jose
Best for weatherThe most comfortable weather comes in May, with highs around 77°F (25°C) and almost no rain.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 62°F (17°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
San Jose weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 62°F(17°C) | 43°F(6°C) | 3.1 in(78 mm) | 75% | 1.9 |
| FebFebruary | 65°F(18°C) | 44°F(7°C) | 2.6 in(65 mm) | 69% | 2.7 |
| MarMarch | 69°F(20°C) | 47°F(8°C) | 2.2 in(57 mm) | 68% | 4.3 |
| AprApril | 73°F(23°C) | 48°F(9°C) | 1.4 in(35 mm) | 62% | 5.5 |
| MayMayBest | 77°F(25°C) | 52°F(11°C) | 0.3 in(7 mm) | 58% | 6.4 |
| JunJune | 82°F(28°C) | 56°F(13°C) | 0.1 in(2 mm) | 54% | 7.4 |
| JulJuly | 84°F(29°C) | 58°F(14°C) | 0.0 in(1 mm) | 58% | 7.3 |
| AugAugust | 85°F(29°C) | 58°F(15°C) | 0.0 in(1 mm) | 57% | 6.6 |
| SepSeptember | 84°F(29°C) | 57°F(14°C) | 0.1 in(2 mm) | 55% | 5.5 |
| OctOctober | 79°F(26°C) | 52°F(11°C) | 0.9 in(23 mm) | 56% | 3.9 |
| NovNovember | 69°F(21°C) | 46°F(8°C) | 1.8 in(46 mm) | 68% | 2.6 |
| DecDecember | 62°F(17°C) | 42°F(6°C) | 2.7 in(69 mm) | 68% | 1.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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