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Zacatecoluca, El Salvador climate
Aw Tropical savanna (dry winter)
Zacatecoluca has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is April with an average daily high near 91°F, while the coldest is December averaging around 65°F at night. Precipitation totals about 44 inches a year and is strongly seasonal — September alone averages 10.0 inches while December barely receives 0.04 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Zacatecoluca climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 90 | 91 | 91 | 88 | 86 | 87 | 87 | 86 | 85 | 86 | 87 |
| Avg temp (°F) | 76 | 77 | 79 | 80 | 79 | 78 | 78 | 78 | 77 | 77 | 76 | 76 |
| Avg low (°F) | 64 | 65 | 67 | 69 | 70 | 69 | 69 | 69 | 69 | 68 | 66 | 65 |
| Precipitation (in) | 0.1 | 0.2 | 0.4 | 1.7 | 5.5 | 9.4 | — | 8.4 | 10.0 | 6.9 | 1.2 | 0.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 90 | 91 | 91 | 88 | 86 |
| Avg temp (°F) | 76 | 77 | 79 | 80 | 79 | 78 |
| Avg low (°F) | 64 | 65 | 67 | 69 | 70 | 69 |
| Precipitation (in) | 0.1 | 0.2 | 0.4 | 1.7 | 5.5 | 9.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 87 | 86 | 85 | 86 | 87 |
| Avg temp (°F) | 78 | 78 | 77 | 77 | 76 | 76 |
| Avg low (°F) | 69 | 69 | 69 | 68 | 66 | 65 |
| Precipitation (in) | — | 8.4 | 10.0 | 6.9 | 1.2 | 0.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 22 | 25 | 31 | 48 | 70 | 75 | 67 | 68 | 76 | 66 | 41 | 24 |
| Relative humidity (%) | 65 | 62 | 61 | 65 | 73 | 79 | 76 | 78 | 82 | 80 | 73 | 69 |
| Wind speed (mph) | 8.7 | 8.0 | 7.9 | 6.8 | 5.9 | 5.2 | 5.1 | 4.9 | 5.3 | 6.0 | 7.6 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 22 | 25 | 31 | 48 | 70 | 75 |
| Relative humidity (%) | 65 | 62 | 61 | 65 | 73 | 79 |
| Wind speed (mph) | 8.7 | 8.0 | 7.9 | 6.8 | 5.9 | 5.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 68 | 76 | 66 | 41 | 24 |
| Relative humidity (%) | 76 | 78 | 82 | 80 | 73 | 69 |
| Wind speed (mph) | 5.1 | 4.9 | 5.3 | 6.0 | 7.6 | 8.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Ilopango Intl, a weather station, about 34 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.