Climate averages 1991–2020
San Salvador weather
in August.
A hot, very wet month: the 8th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in San Salvador: daytime highs average 28.9°C and nights cool to about 21.3°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 230 mm of rain on roughly 26 days, which makes August a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 35 min on an average August day.
The nearest other city in this atlas is Soyapango (6 km away). In August its highs average 28.8°C, about as warm as San Salvador, with 230 mm of rain.
Among the 6 cities listed in El Salvador, San Salvador ranks 4th of 6 for the warmest August highs and joint 2nd of 6 for the driest August (rainfall, lowest first). The mean August high of those 6 cities is 29.7°C; San Salvador is 0.8°C cooler than that mean.
From August to September, average highs fall by 1.1°C to 27.8°C, and monthly rainfall rises from 230 mm to 303 mm.
The annual picture
August 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 Salvador climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.3°C19.3°C | 19.3°C | 1.9 | 0.6 | 11.411 h |
| February | 31.3°C19.8°C | 19.8°C | 2.0 | 0.5 | 11.712 h |
| March | 31.7°C20.6°C | 20.6°C | 9.8 | 2.9 | 12.012 h |
| April | 31.0°C21.6°C | 21.6°C | 50 | 11.3 | 12.412 h |
| May | 29.2°C21.7°C | 21.7°C | 222 | 24.9 | 12.813 h |
| June | 28.2°C21.4°C | 21.4°C | 248 | 26.2 | 12.913 h |
| July | 29.2°C21.2°C | 21.2°C | 186 | 22.3 | 12.813 h |
| August, selected | 28.9°C21.3°C | 21.3°C | 230 | 26.0 | 12.613 h |
| September | 27.8°C21.0°C | 21.0°C | 303 | 28.4 | 12.212 h |
| October | 27.6°C20.6°C | 20.6°C | 232 | 23.3 | 11.812 h |
| November | 28.5°C19.9°C | 19.9°C | 45 | 7.6 | 11.512 h |
| December | 29.6°C19.5°C | 19.5°C | 6.8 | 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
August in nearby cities
- Soyapango in AugustEl Salvador · 6 kmHigh 28.8°C · Low 21.7°C · 230 mm rain
- Santa Tecla in AugustEl Salvador · 10 kmHigh 27.0°C · Low 19.4°C · 230 mm rain
- Apopa in AugustEl Salvador · 13 kmHigh 30.9°C · Low 22.6°C · 230 mm rain
- Santa Ana, El Salvador in AugustEl Salvador · 52 kmHigh 29.9°C · Low 21.3°C · 122 mm rain
- Jutiapa in AugustGuatemala · 101 kmHigh 28.4°C · Low 19.5°C · 140 mm rain
- San Miguel, El Salvador in AugustEl Salvador · 111 kmHigh 32.6°C · Low 24.1°C · 271 mm rain
- Chiquimula in AugustGuatemala · 130 kmHigh 28.5°C · Low 21.6°C · 158 mm rain
- Jalapa in AugustGuatemala · 136 kmHigh 24.9°C · Low 16.7°C · 138 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 Salvador) is explained once on the San Salvador year overview and on the Sources, method and limits page.
Soyapango, Santa Tecla and Apopa lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.