San Salvador in September
In September, San Salvador averages 27°C (81°F) during the day and 21°C (69°F) at night, with frequent rain — about 30 days of the month see precipitation (287 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
September offers comfortable temperatures in San Salvador, with some rain to plan around.
How September compares to the rest of the year in San Salvador
September is one of the coolest months in San Salvador (11th of 12) and one of the wettest months (1st of 12). Daytime temperature runs 2°C below the annual average (29°C). September runs 1°C cooler than August (28°C) and stays flat into October.
September sunrise & sunset in San Salvador
Times shown for San Salvador local time (America/El_Salvador), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in San Salvador — September
Golden-hour and blue-hour windows for the 15th of September, in San Salvador's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Salvador in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and San Salvador's popularity.
Crowds & pricing — September in San Salvador
San Salvador is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in San Salvador
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
San Salvador in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 30°C / 86°F | 19°C / 66°F | 5 mm | 8 | — |
| February | 31°C / 88°F | 19°C / 67°F | 5 mm | 6 | — |
| March | 31°C / 88°F | 20°C / 69°F | 17 mm | 13 | — |
| April | 31°C / 87°F | 21°C / 70°F | 66 mm | 22 | — |
| May | 29°C / 83°F | 21°C / 70°F | 230 mm | 29 | — |
| June | 28°C / 82°F | 21°C / 70°F | 246 mm | 28 | — |
| July | 29°C / 85°F | 21°C / 70°F | 156 mm | 28 | — |
| August | 28°C / 83°F | 21°C / 70°F | 236 mm | 29 | — |
| September | 27°C / 81°F | 21°C / 69°F | 287 mm | 30 | — |
| October | 27°C / 81°F | 20°C / 69°F | 251 mm | 29 | — |
| November | 28°C / 83°F | 20°C / 68°F | 76 mm | 19 | — |
| December | 30°C / 85°F | 19°C / 67°F | 10 mm | 10 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for San Salvador in September →
Frequently asked questions
How hot is San Salvador in September?
In September, San Salvador averages a high of 27°C (81°F) and a low of 21°C (69°F) — generally warm.
Does it rain a lot in San Salvador in September?
September is quite rainy in San Salvador, with about 30 rainy days on average.
Is September a good time to visit San Salvador?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Salvador in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for San Salvador for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.