September
Weather in San Salvador for September 2026
Your guide to San Salvador weather in September - trends and predictions
So far, September 2026 in San Salvador is slightly warmer than the historical average by 1.6 °C.
Expect cooler weather in the next days in San Salvador with the forecast suggesting a temperature of 25 °C, lower than the historical average.
In general, the average temperature in San Salvador at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 26.4 °C by the end of September.
San Salvador experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 430.9 mm.
Temperatures
Rain 🌧️
0
Dry days
30
Rainy days
0
Snow days
27°/20°
Temperatures
6 km/h
Avg max wind
87 %
Avg humidity
San Salvador Weather September
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Temperatures trend during September in San Salvador
See the weather trend as well as the moving average line
September weather in San Salvador day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy light rain with thunder | 29° /20° | 18.2 mm | 7 | |
| 2 Sept. | Patchy light rain with thunder | 28° /20° | 24.5 mm | 5 | |
| 3 Sept. | Patchy light rain with thunder | 29° /20° | 14.1 mm | 5 | |
| 4 Sept. | Patchy light rain with thunder | 29° /20° | 14.9 mm | 7 | |
| 5 Sept. |  Moderate or heavy rain shower | 28° /20° | 22.3 mm | 5 | |
| 6 Sept. |  Light rain shower | 29° /20° | 11.9 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 28° /20° | 12.4 mm | 6 | |
| 8 Sept. | Light rain shower | 28° /20° | 9.8 mm | 5 | |
| 9 Sept. | Light rain shower | 28° /20° | 14 mm | 6 | |
| 10 Sept. | Moderate or heavy rain shower | 29° /20° | 14.6 mm | 8 | |
| 11 Sept. | Patchy light rain with thunder | 29° /20° | 14.8 mm | 8 | |
| 12 Sept. |  Mist | 29° /20° | 6.6 mm | 8 | |
| 13 Sept. |  Partly cloudy | 29° /21° | 9.6 mm | 6 | |
| 14 Sept. | Fog | 28° /20° | 14.9 mm | 5 | |
| 15 Sept. | Mist | 27° /20° | 7.8 mm | 5 | |
| 16 Sept. | Patchy rain possible | 29° /20° | 12.8 mm | 6 | |
| 17 Sept. | Light rain shower | 29° /20° | 13.2 mm | 7 | |
| 18 Sept. | Patchy light rain with thunder | 28° /20° | 9.8 mm | 6 | |
| 19 Sept. | Patchy rain possible | 28° /20° | 10.8 mm | 5 | |
| 20 Sept. | Light rain shower | 27° /20° | 19.7 mm | 5 | |
| 21 Sept. | Light rain shower | 26° /19° | 17.1 mm | 5 | |
| 22 Sept. | Moderate or heavy rain shower | 26° /20° | 16.9 mm | 5 | |
| 23 Sept. | Patchy light rain with thunder | 26° /20° | 14 mm | 5 | |
| 24 Sept. | Patchy light rain with thunder | 27° /20° | 10.5 mm | 5 | |
| 25 Sept. | Patchy light rain with thunder | 28° /20° | 5 mm | 5 | |
| 26 Sept. | Light rain shower | 25° /19° | 9.1 mm | 11.8 | |
| 27 Sept. | Light rain shower | 24° /19° | 10.4 mm | 8.8 | |
| 28 Sept. | Fog | 26° /18° | 5.9 mm | 10.9 | |
| 29 Sept. | Light rain shower | 27° /20° | 4.4 mm | 11.2 | |
| 30 Sept. | Light rain shower | 28° /20° | 7.8 mm | 11.7 | |
| Next | |||||
Important Notice
Our weather forecast for San Salvador in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Salvador forecast closer to your planned date for the most up-to-date weather information.
Change Month
San Salvador in September - FAQ
What are the expected maximum and minimum temperatures in San Salvador during September?
During September, expect a variety of temperatures with highs around 27° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Salvador during September?
Significant rainfall exceeding 430.9 mm is expected in San Salvador during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Salvador during September?
The average wind speed in San Salvador during September is 6 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in San Salvador
Explore the daily rainfall trends and prepare for San Salvadors September weather 💧
Typically, San Salvador has 30 rainy days in September with a total of 430.9 mm of rainfall.
UV exposure in San Salvador during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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