San Marcos, El Salvador Climate by Month
San Marcos, San Salvador Department, El Salvador
Warm all year, with a rainy season from June to October.
The climate in San Marcos is warm all year, with a rainy season from June to October. March is the warmest month, with highs around 86°F (30°C); October is the coolest at 80°F (27°C), and nights dip to 60°F (15°C). It gets 82 in (2071 mm) of rain a year, 84% of it from June to October. December to March are almost completely dry. The air is humid, averaging 78% relative humidity.
- Warmest month
- 86°F(30°C)
- Average high, March
- Coldest nights
- 60°F(15°C)
- Average low, January
- Rain per year
- 82 in(2071 mm)
- Wettest: September
- Humidity
- 78%
- Sunniest: March
Best and worst months in San Marcos
Best for weatherThe most comfortable weather comes from December to February, with highs around 83°F (28°C) and almost no rain.
Least pleasantSeptember is the least pleasant month: it's the wettest, with 16 in (397 mm) of rain.
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in December.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
San Marcos weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuaryBest | 83°F(28°C) | 60°F(15°C) | 0.2 in(4 mm) | 69% | 5.4 |
| FebFebruaryBest | 84°F(29°C) | 61°F(16°C) | 0.1 in(2 mm) | 66% | 6.0 |
| MarMarch | 86°F(30°C) | 62°F(17°C) | 0.3 in(7 mm) | 66% | 6.5 |
| AprApril | 85°F(30°C) | 64°F(18°C) | 1.8 in(46 mm) | 71% | 6.3 |
| MayMay | 83°F(28°C) | 65°F(18°C) | 8.9 in(226 mm) | 77% | 5.8 |
| JunJune | 81°F(27°C) | 64°F(18°C) | 14 in(351 mm) | 84% | 5.4 |
| JulJuly | 83°F(28°C) | 64°F(18°C) | 13 in(319 mm) | 82% | 5.9 |
| AugAugust | 82°F(28°C) | 63°F(17°C) | 13 in(325 mm) | 87% | 5.7 |
| SepSeptember | 80°F(27°C) | 63°F(17°C) | 16 in(397 mm) | 90% | 5.2 |
| OctOctober | 80°F(27°C) | 63°F(17°C) | 13 in(342 mm) | 91% | 4.8 |
| NovNovember | 80°F(27°C) | 61°F(16°C) | 1.8 in(46 mm) | 78% | 5.0 |
| DecDecemberBest | 81°F(27°C) | 60°F(15°C) | 0.2 in(6 mm) | 75% | 5.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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