San Jose, CA Weather
San Jose hourly forecast: next 24 hours
Today's high of 81°F (27°C) is about 3°F (2°C) below the typical July high of 84°F (29°C).
Current conditions in detail
San Jose weather tomorrow (Saturday, July 18)
Tomorrow in San Jose looks sunny, with a high of 91° and an overnight low of 51°. Rain is unlikely (1% chance). Winds top out near 7 mph, and the UV index reaches 10 (very high).
San Jose 14-day forecast
About the weather in San Jose
Weather in San Jose is shaped by its Mediterranean climate - expect hot, dry summers and mild, wetter winters. August afternoons typically reach 84°F (29°C), while December highs hover near 58°F (15°C). Annual precipitation averages 21.5 inches (547 mm) over about 55 rainy days.
San Jose weather: quick facts
- Hottest month: August - highs near 84°F (29°C)
- Coldest month: December - highs near 58°F (15°C)
- Record high: 116°F (47°C) · Record low: 30°F (-1°C) (2015–2024)
- Wettest month: January (10 rainy days) · Sunniest: July (13.8 h sun/day)
- Climate type: Mediterranean - hot, dry summers and mild, wetter winters
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 84°F (29°C) and overnight lows stay near 60°F (16°C). The coolest month is December, with typical highs of 58°F (15°C) and lows around 44°F (7°C). Based on 2015–2024 weather data, temperatures have reached as high as 116°F (47°C) and dropped as low as 30°F (-1°C).
Rain, sun and snow
January is usually the wettest month. It brings about 4.5 inches (115 mm) of rain over 10 days, while August is the driest. July brings the most sunshine, averaging 13.8 hours of sun a day.
Season by season
Spring (March through May)
Spring in San Jose is pleasantly warm, with daytime highs averaging 69°F (21°C) and nights around 49°F (10°C); rain falls on about 18 days over the three months.
Summer (June through August)
Summer in San Jose brings hot afternoons, with daytime highs averaging 83°F (29°C) and nights around 59°F (15°C); precipitation is infrequent.
Fall (September through November)
Fall in San Jose brings comfortable warmth, with daytime highs averaging 75°F (24°C) and nights around 54°F (12°C); rain falls on about 10 days over the three months.
Winter (December through February)
Winter in San Jose stays on the cool side of mild, with daytime highs averaging 60°F (16°C) and nights around 44°F (7°C); expect showers on roughly 27 days across the season.
Average temperatures in San Jose by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 59° | 44° | 10 | 4.5 in | 7.2 h/day | 77% |
| February | 62° | 44° | 8 | 3.3 in | 8.9 h/day | 70% |
| March | 64° | 46° | 10 | 3.7 in | 9.5 h/day | 72% |
| April | 69° | 49° | 5 | 1.4 in | 11.3 h/day | 67% |
| May | 74° | 53° | 3 | 0.6 in | 12.8 h/day | 62% |
| June | 82° | 57° | 0 | 0.0 in | 13.7 h/day | 57% |
| July | 84° | 59° | 0 | 0.1 in | 13.8 h/day | 59% |
| August | 84° | 60° | 0 | 0.0 in | 12.9 h/day | 62% |
| September | 83° | 60° | 1 | 0.2 in | 11.6 h/day | 60% |
| October | 78° | 56° | 3 | 1.2 in | 10.2 h/day | 59% |
| November | 65° | 48° | 6 | 2.1 in | 8.6 h/day | 68% |
| December | 58° | 44° | 9 | 4.4 in | 7.3 h/day | 76% |