San Jose, Costa Rica Weather
San Jose hourly forecast: next 24 hours
Today's high of 71°F (22°C) is about 6°F (3°C) below the typical September high of 77°F (25°C).
Current conditions in detail
San Jose weather tomorrow (Wednesday, September 16)
Tomorrow in San Jose looks light rain shower, with a high of 72° and an overnight low of 58°. There is a 84% chance of rain - plan accordingly. Winds top out near 5 mph, and the UV index reaches 12 (extreme).
San Jose 14-day forecast
About the weather in San Jose
There is not much of a seasonal calendar in San Jose. Its warmest and coolest months differ by 2°C, against a dataset median nearer 15°C, which leaves 80°F (27°C) in April and 75°F (24°C) in October as the two ends of the year.
San Jose weather: quick facts
- Hottest month: April - highs near 80°F (27°C)
- Coldest month: October - highs near 75°F (24°C)
- Decade extremes (2015-2024): 88°F (31°C) high · 53°F (12°C) low
- Wettest month: October (29 rainy days) · Sunniest: February (11.3 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 2°C between the average warmest and coolest month · day to night: 8°C
- Average humidity: 81%
Temperatures through the year
Warmth peaks in April: highs of 80°F (27°C), lows of 63°F (17°C). October is the coolest month, with highs of 75°F (24°C) and lows near 62°F (16°C). February is the brightest month at 11.3 hours of sun a day, against an annual average of 9.3.
Rain, sun and snow
Between the average April and the average October lie 2°C, a narrower spread than all but 3% of the 3496 cities in our dataset. Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is January through March. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 88°F (31°C) and the lowest daily minimum 53°F (12°C).
Season by season
March through May
March through May in San Jose is pleasantly warm, with daytime highs averaging 80°F (26°C) and nights around 62°F (17°C); rain falls on around 52 of the 90 days. Daylight is generous - around 10.0 hours of sun a day.
June through August
June through August is pleasantly warm here - highs near 76°F (25°C), nights near 63°F (17°C), and rain falls on around 79 of the 90 days.
September through November
September through November in San Jose is pleasantly warm, with daytime highs averaging 76°F (24°C) and nights around 62°F (17°C); rain falls on around 83 of the 90 days.
December through February
December through February settles into easy warmth here - highs near 77°F (25°C), nights near 61°F (16°C), and expect showers on roughly 27 days across the season. Daylight is generous - around 10.7 hours of sun a day.
Average temperatures in San Jose by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 77° | 61° | 8 | 1.9 in | 10.7 h/day | 73% |
| February | 79° | 61° | 6 | 1.4 in | 11.3 h/day | 68% |
| March | 80° | 62° | 8 | 1.3 in | 11.2 h/day | 68% |
| April | 80° | 63° | 17 | 4.5 in | 10.4 h/day | 74% |
| May | 78° | 63° | 27 | 15.0 in | 8.5 h/day | 85% |
| June | 76° | 63° | 28 | 14.3 in | 8.1 h/day | 88% |
| July | 76° | 63° | 24 | 12.1 in | 8.3 h/day | 84% |
| August | 77° | 63° | 27 | 15.0 in | 8.5 h/day | 86% |
| September | 77° | 62° | 29 | 16.6 in | 8.2 h/day | 89% |
| October | 75° | 62° | 29 | 21.1 in | 7.8 h/day | 90% |
| November | 75° | 62° | 25 | 13.5 in | 8.1 h/day | 87% |
| December | 76° | 62° | 13 | 3.5 in | 10.1 h/day | 78% |