Monthly climate guide
San Jose weather in May
May in San Jose is typically warm, with average daytime highs around 22°C (72°F) and night-time lows near 9°C (48°F). The month usually brings about 14 mm of rain (very dry) and is mostly sunny. Daytime highs are 3°C warmer than April and 5°C cooler than June.
What stands out in May
- It's one of the drier months, with about 67% less rain than San Jose's average.
- In San Jose, May is late spring.
- Temperatures are climbing — June is around 5°C warmer.
- Expect a big gap between day and night — about 13°C.
Avg high
22°C
72°F
Avg low
9°C
48°F
Rainfall
14 mm
very dry
Humidity
73%
relative
Sky
31%
cloud · mostly sunny
San Jose weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 15°C / 58°F | 5°C / 40°F | 92 mm | 83% | 54% |
| February | 16°C / 60°F | 5°C / 41°F | 86 mm | 81% | 44% |
| March | 17°C / 62°F | 6°C / 43°F | 97 mm | 82% | 51% |
| April | 19°C / 67°F | 7°C / 45°F | 38 mm | 78% | 39% |
| May | 22°C / 72°F | 9°C / 48°F | 14 mm | 73% | 31% |
| June | 27°C / 80°F | 11°C / 51°F | 6 mm | 65% | 16% |
| July | 30°C / 85°F | 12°C / 54°F | 0 mm | 62% | 12% |
| August | 30°C / 86°F | 13°C / 55°F | 0 mm | 63% | 14% |
| September | 30°C / 85°F | 13°C / 55°F | 3 mm | 61% | 16% |
| October | 26°C / 79°F | 11°C / 51°F | 21 mm | 60% | 23% |
| November | 19°C / 66°F | 7°C / 45°F | 57 mm | 71% | 39% |
| December | 14°C / 58°F | 4°C / 39°F | 90 mm | 79% | 46% |
What to pack for May
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is May a good time to visit San Jose?
Compare the months in the chart above to find your ideal window.
Best time to visit San Jose →Other United States cities in May
Cite or embed this data
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San Jose weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/san-jose-usa/may
<a href="https://weathercompare.eu/weather/usa/san-jose-usa/may">San Jose weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/san-jose-usa" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="San Jose weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/san-jose-usa/may">San Jose weather in May</a> – WeatherCompare</p>
San Jose in May: quick answers
Is May a good time to visit San Jose?
Yes. May is one of the best months for San Jose, with highs around 22°C and about 14 mm of rain.
How warm is San Jose in May?
Average highs are about 22°C (72°F) and average lows about 9°C (48°F), based on 10 years of daily data.
Does it rain a lot in San Jose in May?
San Jose typically gets around 14 mm of rain in May — very dry.
Figures are long-term averages for the area around San Jose (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.