Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 24.8 °C | — | 8 days | Ideal — one of the best times of year |
| February | 25.9 °C | — | 6 days | Ideal — one of the best times of year |
| March | 26.9 °C | — | 8 days | Ideal — one of the best times of year |
| April | 26.9 °C | — | 17 days | Possible, with trade-offs |
| May | 25.5 °C | — | 27 days | Unfavourable season |
| June | 24.4 °C | — | 28 days | Unfavourable season |
| July | 24.6 °C | — | 24 days | Unfavourable season |
| August | 24.7 °C | — | 27 days | Unfavourable season |
| September | 24.8 °C | — | 29 days | Unfavourable season |
| October | 24.1 °C | — | 29 days | Unfavourable season |
| November | 23.7 °C | — | 25 days | Unfavourable season |
| December | 24.3 °C | — | 13 days | Pleasant — a good time to go |
Before you go
Three things to check once you have picked your dates.
Entry
Entry rules depend on your nationality and change often. Check them before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 19 May 2026
Health
Recommended vaccinations, water quality, mosquitoes: advice depends on the country and the season. Some vaccines need time before departure.
Beau Fixe is not a safety or health authority. These notes summarise public advisories and link to their source; only the competent authorities are authoritative. Alert levels: Foreign, Commonwealth & Development Office (gov.uk), Open Government Licence v3.0.
FAQ
Can you swim in San José in December?
San José is not a seaside destination (no sea data).
How hot is San José in December?
Expect 24.3°C in the afternoon and 16.4°C at night, averaged over the last 10 years.
Does it rain a lot in San José in December?
Around 13 days with rain (≥ 1 mm) in the month — 41% of days.