Climate averages 1991–2020
San Salvador weather
in May.
A hot, very wet month: the joint 6th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in San Salvador: daytime highs average 29.2°C and nights cool to about 21.7°C. By daytime temperature it is the joint 6th warmest of the 12 months.
Expect about 222 mm of rain on roughly 25 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 45 min on an average May day.
The nearest other city in this atlas is Soyapango (6 km away). In May its highs average 29.0°C, about as warm as San Salvador, with 222 mm of rain.
Among the 6 cities listed in El Salvador, San Salvador ranks 4th of 6 for the warmest May highs and joint 2nd of 6 for the driest May (rainfall, lowest first). The mean May high of those 6 cities is 30.1°C; San Salvador is 0.9°C cooler than that mean.
From May to June, average highs fall by 0.9°C to 28.2°C, and monthly rainfall rises from 222 mm to 248 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Soyapango in MayEl Salvador · 6 kmHigh 29.0°C · Low 22.1°C · 222 mm rain
- Santa Tecla in MayEl Salvador · 10 kmHigh 27.3°C · Low 19.8°C · 222 mm rain
- Apopa in MayEl Salvador · 13 kmHigh 31.4°C · Low 23.2°C · 222 mm rain
- Santa Ana, El Salvador in MayEl Salvador · 52 kmHigh 30.5°C · Low 21.7°C · 138 mm rain
- Jutiapa in MayGuatemala · 101 kmHigh 29.2°C · Low 20.1°C · 159 mm rain
- San Miguel, El Salvador in MayEl Salvador · 111 kmHigh 33.1°C · Low 25.0°C · 258 mm rain
- Chiquimula in MayGuatemala · 130 kmHigh 30.8°C · Low 22.2°C · 110 mm rain
- Jalapa in MayGuatemala · 136 kmHigh 26.2°C · Low 17.2°C · 143 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.