Climate averages 1991–2020
San Miguel, El Salvador weather
by month.
See how the year changes. March has the highest average daily maximum; January has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year San Miguel, El Salvador averages a daytime high of 33.2°C and a nighttime low of 23.6°C, with about 1,783 mm of rain on roughly 160 days. March is the warmest month (average high 36.1°C) and October the coolest (30.3°C). September is the wettest month with 343 mm; January is the driest with 1.2 mm.
The annual picture
A year in San Miguel
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Miguel, El Salvador climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 34.7°C22.4°C | 22.4°C | 1.2 | 0.4 | 11.411 h |
| February | 35.7°C23.3°C | 23.3°C | 1.4 | 0.3 | 11.712 h |
| March | 36.1°C24.5°C | 24.5°C | 8.6 | 2.1 | 12.012 h |
| April | 35.5°C25.6°C | 25.6°C | 44 | 9.1 | 12.412 h |
| May | 33.1°C25.0°C | 25.0°C | 258 | 22.7 | 12.713 h |
| June | 31.6°C24.0°C | 24.0°C | 291 | 23.6 | 12.913 h |
| July | 33.2°C24.1°C | 24.1°C | 194 | 18.9 | 12.813 h |
| August | 32.6°C24.1°C | 24.1°C | 271 | 22.5 | 12.613 h |
| September | 30.9°C23.6°C | 23.6°C | 343 | 26.7 | 12.212 h |
| October | 30.3°C23.1°C | 23.1°C | 304 | 24.0 | 11.812 h |
| November | 31.5°C22.3°C | 22.3°C | 61 | 8.8 | 11.512 h |
| December | 33.6°C22.0°C | 22.0°C | 5.7 | 1.3 | 11.311 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- SoyapangoEl Salvador · 107 kmHigh 29.2°C · Low 21.0°C · 1,535 mm rain a year
- Ciudad CholutecaHonduras · 110 kmHigh 33.7°C · Low 23.9°C · 2,050 mm rain a year
- San SalvadorEl Salvador · 111 kmHigh 29.4°C · Low 20.7°C · 1,535 mm rain a year
- ApopaEl Salvador · 114 kmHigh 31.3°C · Low 21.9°C · 1,535 mm rain a year
- Santa TeclaEl Salvador · 121 kmHigh 27.5°C · Low 18.8°C · 1,535 mm rain a year
- TegucigalpaHonduras · 125 kmHigh 27.7°C · Low 18.8°C · 1,507 mm rain a year
- SiguatepequeHonduras · 130 kmHigh 24.7°C · Low 17.1°C · 1,957 mm rain a year
- ChinandegaNicaragua · 148 kmHigh 31.7°C · Low 24.8°C · 1,897 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-6, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 13.50°, -88.20° (3 km from the city centre), adjusted up by 0.6°C for the difference between the city's elevation (130 m) and the cell's (221 m). Rain comes from the 0.25° cell at 13.50°, -88.25°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.