San Jose weather
Loading live data…Clear,much the same tomorrow
NWS, the American and the European model put San Jose's high today between 69° and 74°, a 4° split. Tomorrow: cloudy, around 74°, with a 0% chance of rain.
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San Jose weather in numbers
measured normals and 10 years of recorded weatherSan Jose swings 43°F across the year, from 85°F highs in July to 42°F lows in December, and January is usually the wettest month in a year that brings about 22 in of precipitation. Over 10 years of recorded weather it averages 137 days a year at 77°F or above, 46 of them at 86°F or above, 0 frost nights, and rain on 56 days.
Day counts are from the ERA5 reanalysis for San Jose’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.
The weather map: all three models at once
NWS, American, European side by side around San Jose and nearby towns.Live rain radar →San Jose in 3D: the weather on the streets, hour by hour
Rain, sun and real shadows drawn on a 3D map of San Jose, 48 hours ahead. Drag the timeline, pick what you are doing or where you are going, and read the verdict for that hour.Full screen ↗What are you doing?
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San Jose hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
San Jose 10-day forecast, out to 14 days
where the models agree, and where they splitSan Jose, California (CA). Below we compare what NWS, American, European forecast for San Jose right now and flag exactly where they disagree, then break down San Jose's weather month by month and which forecast model has been most accurate here.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
San Jose weather by month
what to expect in San Jose through the year, 1991-2020 averagesHere is San Jose's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to San Jose by season.
What San Jose's weather is like through the year
San Jose runs from warm summers, with July highs near 85°F, to cold winters, when December lows sit around 42°F (a swing of about 43°F across the year). January is usually the wettest month, and San Jose sees roughly 22 inches of precipitation annually.
Best time to visit San Jose
The most comfortable time to visit San Jose is usually February, March, April and May, when daytime highs sit in the pleasant 60-78°F range and the heaviest January rain is behind you.
How San Jose's weather has changed since 1995
30 years of daily data, 1995-2024, shown as changeAround San Jose, 2015-2024 averaged 0.8°F warmer than 1995-2004. 5 of the 10 warmest years since 1995 fall in the last ten, and the warmest was 2014.
Days above 95°F
2015-2024 against 1995-2004. Within the normal year-to-year swing
Frost nights
2015-2024 against 1995-2004, below 32°F. Within the normal year-to-year swing
Average wind
2015-2024 against 1995-2004. Within the normal year-to-year swing
Bars: each year against the area's 30-year average. Dashed lines: the average of the first and the last ten years.
See the numbers year by year
| Year | Temp vs average | Days >95°F vs avg | Frost nights vs avg | Wind vs avg |
|---|---|---|---|---|
| 1995 | +0.4°F | −1 | −7 | −2% |
| 1996 | +0.8°F | +8 | −7 | +1% |
| 1997 | +0.8°F | −5 | +8 | +4% |
| 1998 | −1.4°F | +6 | +2 | −2% |
| 1999 | −1.5°F | −4 | +3 | +1% |
| 2000 | −0.6°F | −4 | −6 | −2% |
| 2001 | −0.1°F | −3 | +2 | +4% |
| 2002 | −0.5°F | +2 | +4 | +1% |
| 2003 | +0.4°F | +3 | −6 | −2% |
| 2004 | +0.3°F | −3 | +1 | +1% |
| 2005 | +0.1°F | −2 | −0 | −2% |
| 2006 | −0.6°F | +3 | +2 | −5% |
| 2007 | −0.8°F | −6 | +11 | +1% |
| 2008 | −0.5°F | +7 | +1 | +1% |
| 2009 | −0.8°F | +8 | +2 | +1% |
| 2010 | −1.5°F | −6 | −2 | +1% |
| 2011 | −2.3°F | −8 | +8 | +1% |
| 2012 | −0.8°F | −4 | +1 | +4% |
| 2013 | −0.3°F | −6 | +18 | −2% |
| 2014 | +2.6°F | +5 | −5 | −2% |
| 2015 | +1.5°F | +1 | −0 | −5% |
| 2016 | +0.4°F | −3 | +2 | +1% |
| 2017 | +0.8°F | +1 | −3 | +1% |
| 2018 | +0.4°F | −12 | −1 | −2% |
| 2019 | +0.4°F | −2 | −1 | +4% |
| 2020 | +1.7°F | +6 | −5 | −5% |
| 2021 | +0.1°F | −2 | −6 | +7% |
| 2022 | +0.3°F | −2 | −2 | −2% |
| 2023 | −0.6°F | −1 | −2 | +1% |
| 2024 | +1.3°F | +17 | −7 | +1% |
Source: NASA POWER daily data from the MERRA-2 reanalysis, 1995-2024. Each value describes a grid square of about 50 km around San Jose, not a weather station, and a square that takes in sea or a large lake runs milder than the city itself. That is why this section shows change against the square's own 30-year average rather than counts you could compare with a local station. Rain and snow are left out because their long-term record in this dataset is not consistent over time. "Within the normal year-to-year swing" means the change is smaller than the usual differences between single years.
Which forecast is most accurate in San Jose?
CheckWeather Score, graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.
Bottom line: over the last 30 days the American model has been the most accurate forecast for San Jose, scoring 92/100 on our CheckWeather Score, ahead of the European at 85. See the full US accuracy scoreboard for exactly how every model is tested.
What do you think of the forecasts?
your vote countsThe accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.
One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.
Where the models disagree
temperature and rain, judged separatelyThe models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.