Climate averages 1991–2020
San Miguel, El Salvador weather
in September.
A hot, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in San Miguel, El Salvador: daytime highs average 30.9°C and nights cool to about 23.6°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 343 mm of rain on roughly 27 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 13 min on an average September day.
The nearest other city in this atlas is Soyapango (107 km away). In September its highs average 27.5°C, 3.3°C cooler than San Miguel, El Salvador, with 303 mm of rain.
Among the 6 cities listed in El Salvador, San Miguel, El Salvador ranks 1st of 6 for the warmest September highs and 6th of 6 for the driest September (rainfall, lowest first). The mean September high of those 6 cities is 28.3°C; San Miguel, El Salvador is 2.5°C warmer than that mean.
From September to October, average highs fall by 0.6°C to 30.3°C, and monthly rainfall falls from 343 mm to 304 mm.
The annual picture
September in context
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, selected | 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
September in nearby cities
- Soyapango in SeptemberEl Salvador · 107 kmHigh 27.5°C · Low 21.4°C · 303 mm rain
- Ciudad Choluteca in SeptemberHonduras · 110 kmHigh 31.3°C · Low 23.5°C · 425 mm rain
- San Salvador in SeptemberEl Salvador · 111 kmHigh 27.8°C · Low 21.0°C · 303 mm rain
- Apopa in SeptemberEl Salvador · 114 kmHigh 29.5°C · Low 22.4°C · 303 mm rain
- Santa Tecla in SeptemberEl Salvador · 121 kmHigh 25.8°C · Low 19.2°C · 303 mm rain
- Tegucigalpa in SeptemberHonduras · 125 kmHigh 27.5°C · Low 19.8°C · 276 mm rain
- Siguatepeque in SeptemberHonduras · 130 kmHigh 25.4°C · Low 18.1°C · 369 mm rain
- Chinandega in SeptemberNicaragua · 148 kmHigh 29.9°C · Low 24.4°C · 384 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Miguel) is explained once on the San Miguel, El Salvador year overview and on the Sources, method and limits page.