Log visit
Costa Rica
San Miguel weather by month
Historical averages 2016–2025 · not a forecast
Loading your weather period…
When is the best time to visit San Miguel?
For a warm holiday, the best week has been 31 January – 6 February (Weather Index 98). Favourable start dates for a 7-day trip run from 18 January to 10 February. March is warmest (26°C), February is driest and January, February and March have the most sun.
- Warmest
- March 26°C
- Coolest
- October, November and December 24°C
- Driest
- February 17% rain-day chance
- Wettest
- September 99% rain-day chance
- Sunniest
- January, February and March 11 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in San Miguel
San Miguel historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 24.6 | 16.6 | 20.6 | 6.4 | 32.0 | 10.8 |
| February | 25.1 | 16.7 | 17.1 | 4.8 | 18.8 | 11.3 |
| March | 25.5 | 17.0 | 30.0 | 9.3 | 46.9 | 11.3 |
| April | 25.4 | 17.9 | 72.3 | 21.7 | 151.1 | 10.3 |
| May | 25.3 | 18.6 | 93.9 | 29.1 | 457.5 | 8.2 |
| June | 24.9 | 18.4 | 98.0 | 29.4 | 451.5 | 7.7 |
| July | 24.8 | 18.4 | 89.4 | 27.7 | 319.6 | 7.8 |
| August | 24.9 | 18.1 | 93.2 | 28.9 | 405.2 | 8.0 |
| September | 24.9 | 18.0 | 99.3 | 29.8 | 476.1 | 7.7 |
| October | 24.4 | 17.9 | 97.7 | 30.3 | 595.3 | 7.0 |
| November | 24.1 | 17.8 | 88.3 | 26.5 | 376.7 | 7.7 |
| December | 24.2 | 17.1 | 39.0 | 12.1 | 83.4 | 10.0 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.