Climate averages 1991–2020
San José weather
by month.
See how the year changes. March has the highest average daily maximum; March has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year San José averages a daytime high of 24.7°C and a nighttime low of 17.8°C, with about 3,022 mm of rain on roughly 273 days. March is the warmest month (average high 26.6°C) and November the coolest (23.4°C). October is the wettest month with 430 mm; March is the driest with 65 mm.
The annual picture
A year in San José
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San José climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.6°C16.8°C | 16.8°C | 104 | 13.3 | 11.612 h |
| February | 25.7°C16.9°C | 16.9°C | 69 | 11.9 | 11.812 h |
| March | 26.6°C17.4°C | 17.4°C | 65 | 13.9 | 12.112 h |
| April | 26.5°C18.1°C | 18.1°C | 102 | 18.0 | 12.312 h |
| May | 25.0°C18.6°C | 18.6°C | 357 | 27.8 | 12.613 h |
| June | 24.4°C18.6°C | 18.6°C | 385 | 28.8 | 12.713 h |
| July | 24.2°C18.3°C | 18.3°C | 293 | 28.2 | 12.613 h |
| August | 24.3°C18.2°C | 18.2°C | 345 | 28.5 | 12.412 h |
| September | 24.2°C18.1°C | 18.1°C | 391 | 29.1 | 12.212 h |
| October | 23.7°C18.1°C | 18.1°C | 430 | 30.1 | 11.912 h |
| November | 23.4°C17.9°C | 17.9°C | 312 | 25.5 | 11.712 h |
| December | 23.8°C17.3°C | 17.3°C | 169 | 17.8 | 11.612 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- DavidPanama · 247 kmHigh 29.5°C · Low 22.2°C · 3,838 mm rain a year
- Granada, NicaraguaNicaragua · 302 kmHigh 29.9°C · Low 24.3°C · 1,145 mm rain a year
- MasayaNicaragua · 316 kmHigh 29.8°C · Low 23.0°C · 1,145 mm rain a year
- ManaguaNicaragua · 340 kmHigh 32.4°C · Low 24.1°C · 898 mm rain a year
- MatagalpaNicaragua · 388 kmHigh 27.7°C · Low 20.0°C · 1,027 mm rain a year
- León, NicaraguaNicaragua · 413 kmHigh 31.7°C · Low 24.5°C · 1,890 mm rain a year
- EstelíNicaragua · 430 kmHigh 28.2°C · Low 19.7°C · 1,236 mm rain a year
- ChinandegaNicaragua · 447 kmHigh 31.7°C · Low 24.8°C · 1,897 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-6, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 9.90°, -84.10° (4 km from the city centre), adjusted up by 0.9°C for the difference between the city's elevation (1,133 m) and the cell's (1,273 m). Rain comes from the 0.25° cell at 10.00°, -84.00°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.