Climate Chart of San José, Costa Rica
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For San José, Costa Rica, the climate data describe 2013–2023. Monthly mean temperatures remain within a relatively narrow range: the overall monthly mean is 20.4 °C, with the warmest monthly mean in April at 21.3 °C and the coolest in October at 19.7 °C. Rainfall and sunshine vary more noticeably by month, so visitors may want to consider their priorities when planning outdoor activities.
Climate overview
Temperature
The monthly mean temperature reaches its high in April, at 21.3 °C, while the low is 19.7 °C in October. The unweighted mean across monthly means is 20.4 °C. These figures describe month-level averages, not daytime highs or the range of temperatures a visitor may experience from day to day.
Rain
Mean daily rainfall is lowest in February, at 0.41 mm/day, and highest in October, at 16.62 mm/day. The unweighted mean across monthly means is 7.65 mm/day. These are average daily amounts rather than monthly totals; they do not show how often rain falls or guarantee that a particular day will be dry or wet.
Sunshine
Mean daily sunshine duration peaks in March at 10.80 hours/day, while its lowest monthly mean is 7.42 hours/day in October. Across the monthly means, the unweighted average is 8.95 hours/day per day. These averages can help with broad outdoor-planning expectations, but sunshine duration is not the same as daylight length and does not guarantee sunshine on a given day.
Best Travel Time Guide for San José, Costa Rica: Ideal Seasons and Weather Insights
For visitors prioritising lower average rainfall, February is the conditional option in the monthly data, with mean daily rainfall of 0.41 mm/day. That average does not guarantee rain-free days or indicate rain frequency, so flexible plans and suitable rain protection remain sensible. If cooler monthly mean temperatures are the priority, consider October, when the mean is 19.7 °C; this is not a daytime maximum and cannot describe every day's conditions. For greater average sunshine duration, March records 10.80 hours/day per day, which may help with outdoor-sightseeing plans without guaranteeing clear skies.
Prepare for rain when visiting in October, the month with the highest mean daily rainfall at 16.62 mm/day; the figure is not a monthly total and does not specify how many days will be wet. Mean daily sunshine duration is lowest in October at 7.42 hours/day, another useful planning context rather than a forecast of cloud or daylight on specific dates.
Climate Data Overview for San José, Costa Rica
Explore the comprehensive climate data for San José, Costa Rica. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 20.1 | 1.00 | 0.00 | 10.28 |
| Feb | 20.6 | 0.41 | 0.00 | 10.74 |
| Mar | 21.0 | 0.85 | 0.00 | 10.80 |
| Apr | 21.3 | 3.32 | 0.00 | 10.02 |
| May | 20.7 | 11.67 | 0.00 | 8.24 |
| Jun | 20.4 | 11.59 | 0.00 | 7.72 |
| Jul | 20.5 | 8.48 | 0.00 | 8.01 |
| Aug | 20.3 | 12.17 | 0.00 | 8.12 |
| Sep | 20.0 | 14.08 | 0.00 | 7.91 |
| Oct | 19.7 | 16.62 | 0.00 | 7.42 |
| Nov | 19.8 | 9.21 | 0.00 | 8.23 |
| Dec | 19.9 | 2.45 | 0.00 | 9.88 |
| Average | 20.4 | 7.65 | 0.00 | 8.95 |
