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When to go · Climate guide
Costa Ricawhen to go
Costa Rica's national averages run from 26 °C in December to 28 °C in April, with rainfall between 66 mm in March and 508 mm in October and 3.5–7.8 hours of sun a day. Against the default preferences (under 2.7 mm of rain a day, at least 6 hours of sun), the strongest months are February, March and January. Its 7 regions span 22–30 °C in annual mean temperature, so the national figure hides a good deal.
- Capital
- San José
- Region
- North America
- TZ
- America/Bogota
- Area
- 51,303 km²
Best months to visit
When Costa Rica shines
Climate at a glance · 10-year ERA5
A decade of weather, in one page
— daytime high— overnight low▬ typical range
View data table
| Month | Average daytime high (°C) | Average overnight low (°C) | Typical low | Typical high |
|---|---|---|---|---|
| January | 26.1 | 19.7 | 18.2 | 27.6 |
| February | 26.6 | 19.9 | 18.4 | 28.1 |
| March | 27.4 | 20.2 | 18.7 | 29.0 |
| April | 27.9 | 21.0 | 19.6 | 29.4 |
| May | 27.9 | 21.7 | 20.6 | 29.7 |
| June | 27.2 | 21.5 | 20.4 | 28.7 |
| July | 27.0 | 21.4 | 20.4 | 28.4 |
| August | 27.2 | 21.2 | 20.3 | 28.8 |
| September | 27.3 | 21.1 | 20.3 | 28.7 |
| October | 26.8 | 20.9 | 20.1 | 28.1 |
| November | 26.1 | 20.8 | 19.7 | 27.6 |
| December | 26.0 | 20.2 | 18.8 | 27.3 |
View data table
| Month | Rainfall (mm) |
|---|---|
| January | 107 |
| February | 72 |
| March | 66 |
| April | 145 |
| May | 355 |
| June | 402 |
| July | 347 |
| August | 370 |
| September | 364 |
| October | 508 |
| November | 418 |
| December | 188 |
View data table
| Month | Sunshine hours (hr / day) |
|---|---|
| January | 6.9 |
| February | 7.7 |
| March | 7.8 |
| April | 6.5 |
| May | 4.3 |
| June | 3.5 |
| July | 3.6 |
| August | 4.0 |
| September | 4.1 |
| October | 3.6 |
| November | 3.8 |
| December | 5.9 |
— average▬ typical range
View data table
| Month | Average wind speed (km/h) | Typical low | Typical high |
|---|---|---|---|
| January | 8.4 | 5.5 | 11.8 |
| February | 9.0 | 5.3 | 12.5 |
| March | 8.3 | 5.1 | 11.2 |
| April | 6.7 | 4.3 | 10.0 |
| May | 5.2 | 3.7 | 7.5 |
| June | 5.0 | 3.7 | 6.8 |
| July | 6.0 | 4.2 | 8.2 |
| August | 5.3 | 3.8 | 7.3 |
| September | 4.7 | 3.7 | 5.9 |
| October | 4.8 | 3.8 | 6.4 |
| November | 5.8 | 4.1 | 7.9 |
| December | 7.4 | 4.8 | 10.1 |
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Sea surface temperature
Sea surface temperature for Costa Rica is part of the Premium map and its district-level detail. See what Premium includes.
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Heat index
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Humidity
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What’s open · year round
Things to do in Costa Rica
Nothing on this list closes for the season in Costa Rica, but every one of them has a window worth aiming for.
- LimitedOlive ridley arribada, Ostional
Limited November–August · at its best September–October
Sources: gypsycabnosara.com, costaricaexperts.com
- At its best
Opening seasons are checked by hand against the operators and parks themselves, not derived from the climate figures on this page. Last reviewed 2026-08-28. Dates move — confirm before you book.
Safety · 6 governments
What the governments say about Costa Rica
Combined advisory · most-cautious-wins
Exercise increased caution
Highest level across 6 governments · Advisory last changed
See breakdown by countryHide breakdown
CA
Level 2Exercise increased caution
Exercise increased caution
DE
Level 1Exercise normal precautions
Exercise normal precautions
NL
Level 2Exercise increased caution
Exercise increased caution
UK
Level 1Exercise normal precautions
Exercise normal precautions
US
Level 2Exercise increased caution
Exercise increased caution
Month by month
A year in Costa Rica, in order
- JanJanuary26.1°C · 107 mm · 6.9 hr/day
Around 26 °C with 107 mm of rain and 6.9 hours of sun a day.
Around 26 °C with 107 mm of rain and 6.9 hours of sun a day.
- FebFebruary26.6°C · 72 mm · 7.7 hr/day
Around 27 °C with 71 mm of rain and 7.7 hours of sun a day.
Around 27 °C with 71 mm of rain and 7.7 hours of sun a day.
- MarMarch27.4°C · 66 mm · 7.8 hr/day
Around 27 °C with 66 mm of rain and 7.8 hours of sun a day.
Around 27 °C with 66 mm of rain and 7.8 hours of sun a day.
- AprApril27.9°C · 145 mm · 6.5 hr/day
Around 28 °C with 145 mm of rain and 6.5 hours of sun a day.
Around 28 °C with 145 mm of rain and 6.5 hours of sun a day.
- MayMay27.9°C · 355 mm · 4.3 hr/day
Around 28 °C with 355 mm of rain and 4.3 hours of sun a day.
Around 28 °C with 355 mm of rain and 4.3 hours of sun a day.
- JunJune27.2°C · 402 mm · 3.5 hr/day
Around 27 °C with 402 mm of rain and 3.5 hours of sun a day.
Around 27 °C with 402 mm of rain and 3.5 hours of sun a day.
- JulJuly27.0°C · 347 mm · 3.6 hr/day
Around 27 °C with 347 mm of rain and 3.6 hours of sun a day.
Around 27 °C with 347 mm of rain and 3.6 hours of sun a day.
- AugAugust27.2°C · 370 mm · 4.0 hr/day
Around 27 °C with 370 mm of rain and 4.0 hours of sun a day.
Around 27 °C with 370 mm of rain and 4.0 hours of sun a day.
- SepSeptember27.3°C · 364 mm · 4.1 hr/day
Around 27 °C with 363 mm of rain and 4.1 hours of sun a day.
Around 27 °C with 363 mm of rain and 4.1 hours of sun a day.
- OctOctober26.8°C · 508 mm · 3.6 hr/day
Around 27 °C with 508 mm of rain and 3.6 hours of sun a day.
Around 27 °C with 508 mm of rain and 3.6 hours of sun a day.
- NovNovember26.1°C · 418 mm · 3.8 hr/day
Around 26 °C with 418 mm of rain and 3.8 hours of sun a day.
Around 26 °C with 418 mm of rain and 3.8 hours of sun a day.
- DecDecember26.0°C · 188 mm · 5.9 hr/day
Around 26 °C with 188 mm of rain and 5.9 hours of sun a day.
Around 26 °C with 188 mm of rain and 5.9 hours of sun a day.
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