San Jose, CA Weather
San Jose hourly forecast: next 24 hours
Today's high of 95°F (35°C) is about 11°F (6°C) above the typical August high of 84°F (29°C).
Current conditions in detail
San Jose weather tomorrow (Thursday, August 27)
Tomorrow in San Jose looks overcast, with a high of 93° and an overnight low of 65°. Rain is unlikely (6% chance). Winds top out near 10 mph, and the UV index reaches 9 (very high).
San Jose 14-day forecast
About the weather in San Jose
San Jose runs on a dry-summer rhythm: the warmest months are also the driest. August averages less than 1 mm while the wet season peaks in January at 4.5 inches (115 mm). Highs range from 58°F (15°C) to 84°F (29°C).
San Jose weather: quick facts
- Hottest month: August - highs near 84°F (29°C)
- Coldest month: December - highs near 58°F (15°C)
- Decade extremes (2015-2024): 116°F (47°C) high · 30°F (-1°C) low
- Wettest month: January (10 rainy days) · Sunniest: July (13.8 h sun/day)
- Climate type: Mediterranean
- Annual swing: 11°C between the average warmest and coolest month · day to night: 11°C
- Average humidity: 66%
Temperatures through the year
5 months average under 20 mm of rain, the longest unbroken stretch running May through September. Warmth peaks in August: highs of 84°F (29°C), lows of 60°F (16°C). December sits at the other end of the year: 58°F (15°C) by day, 44°F (7°C) at night. The gridded 2015-2024 daily record for this location tops out at 116°F (47°C) and bottoms at 30°F (-1°C) - decade extremes, not all-time station records. Relative humidity averages 66% across the year, drier than about 77% of the cities we track.
Rain, sun and snow
Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is April through May.
Season by season
Spring (March through May)
Spring in San Jose settles into easy warmth, with daytime highs averaging 69°F (21°C) and nights around 49°F (10°C); rain comes on about 18 days over the three months. Daylight is generous - around 11.2 hours of sun a day.
Summer (June through August)
Summer is hot here - highs near 83°F (29°C), nights near 59°F (15°C), and precipitation is essentially absent. Daylight is generous - around 13.5 hours of sun a day.
Fall (September through November)
Through fall, San Jose settles into easy warmth: 75°F (24°C) by day, 54°F (12°C) after dark, and rain comes on about 10 days over the three months. Daylight is generous - around 10.1 hours of sun a day.
Winter (December through February)
Through winter, San Jose stays on the cool side of mild: 60°F (16°C) by day, 44°F (7°C) after dark, and 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% |