San José, Costa Rica Climate by Month
San José, Costa Rica
Warm all year, with rain spread through the year.
San José is warm all year, with rain spread through the year. Afternoon highs range from 78°F (25°C) in November to 82°F (28°C) in April, and February nights average 60°F (15°C). About 136 in (3458 mm) of rain falls in a typical year, with no clear rainy season. The air is humid, averaging 84% relative humidity.
- Warmest month
- 82°F(28°C)
- Average high, April
- Coldest nights
- 60°F(15°C)
- Average low, February
- Rain per year
- 136 in(3458 mm)
- No clear rainy season
- Humidity
- 84%
- Sunniest: March
Best and worst months in San José
Best for weatherThe most comfortable weather comes from January to March, with highs around 79°F (26°C) and about 3.0 in (76 mm) of rain a month.
Least pleasantAugust and September are the least pleasant; August is the wettest, with 19 in (484 mm) of rain.
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in February.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
San José weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuaryBest | 78°F(26°C) | 60°F(15°C) | 3.5 in(89 mm) | 79% | 5.2 |
| FebFebruaryBest | 79°F(26°C) | 60°F(15°C) | 2.8 in(71 mm) | 77% | 5.6 |
| MarMarchBest | 81°F(27°C) | 60°F(16°C) | 2.7 in(69 mm) | 78% | 6.0 |
| AprApril | 82°F(28°C) | 62°F(17°C) | 5.6 in(141 mm) | 83% | 5.9 |
| MayMay | 81°F(27°C) | 62°F(17°C) | 16 in(399 mm) | 87% | 5.4 |
| JunJune | 80°F(27°C) | 62°F(17°C) | 15 in(376 mm) | 85% | 5.3 |
| JulJuly | 80°F(27°C) | 62°F(17°C) | 15 in(370 mm) | 85% | 5.3 |
| AugAugust | 80°F(27°C) | 61°F(16°C) | 19 in(484 mm) | 86% | 5.5 |
| SepSeptember | 80°F(27°C) | 61°F(16°C) | 18 in(466 mm) | 87% | 5.4 |
| OctOctober | 79°F(26°C) | 60°F(16°C) | 19 in(473 mm) | 89% | 5.0 |
| NovNovember | 78°F(25°C) | 61°F(16°C) | 14 in(356 mm) | 86% | 4.6 |
| DecDecember | 78°F(26°C) | 60°F(16°C) | 6.5 in(164 mm) | 82% | 4.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate
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