San José weather in April
April in San José: warm, rainy, with clean air — fine if you can take 21 rainy days.
#5 of 12 months in San José · #399 of 897 destinations to visit in April · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on San José in April
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San José climate normals — April
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 65°F | |
| Rainfall | 99 mm / 3.9 in | 🌧 rainy |
| Rainy days | 21 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 12.4 h | |
| Wind | 8 km/h / 5 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San José in April — FAQ
- Is April a good time to visit San José?
- April in San José: warm, rainy, with clean air — fine if you can take 21 rainy days. It ranks #5 of 12 months for San José on SeasonMap's comfort score (82/100).
- What is the weather like in San José in April?
- In April, San José averages a daily high of 26.3°C and a low of 18.4°C, with about 98.7 mm of rain over roughly 20.8 rainy days.
- What is the air quality in San José in April?
- San José has a mean US Air Quality Index of about 43 in April.