Antiguo Cuscatlán Weather in September

Antiguo Cuscatlán in September averages 31°C (88°F) during the day and 22°C (72°F) at night. This is the wettest month of the year.

Rainfall in Antiguo Cuscatlán in September

As part of the rainy season, Antiguo Cuscatlán sees around 29 days of rain in September, with an average of 327 mm (13 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Antiguo Cuscatlán in September

Expect highs of 31°C (88°F) in Antiguo Cuscatlán in September, with nights dropping to around 22°C (72°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.

Sunshine in Antiguo Cuscatlán in September

The area enjoys a moderate level of sunlight, with around 181 hours. It's a good balance between sunny and rainy days.

Wind Speed in Antiguo Cuscatlán in September

Wind speeds average 1 m/s (2 knots) during September. At this speed, you'll experience mostly light air movement that's just barely noticeable. As an average, some days will be completely calm while others have gentle breezes you can feel on your skin.

September in Antiguo Cuscatlán can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit El Salvador, check out our Antiguo Cuscatlán's climate page.

Antiguo Cuscatlán Temperature in September

Min Temperature 22°C (72°F)  

Max Temperature 31°C (88°F)  

Chance of Rain 97%  

Precipitation 327 mm (13 in)  

Rainy days 29 days  

Humidity 86% *  

Windspeed 1 m/s (2 knots) *  

Sunshine 181 hours *  

Percentage Sunshine *  

* Data from: San Salvador, El Salvador (12 KM, 7 Miles).

Daily Historical Temperatures

35-year average (1981-2025)

Based on our historical records, temperatures in Antiguo Cuscatlán typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 21°C (70°F).

Average temperatures in September

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Daily Historical Precipitation

35-year average (1981-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Antiguo Cuscatlán in September

Browse day-by-day weather records for Antiguo Cuscatlán spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Antiguo Cuscatlán historical weather extremes in September

Based on weather observations in Antiguo Cuscatlán between 2005 and 2025, these are the recorded extremes during September.

• The warmest day in September was on September 14, 2023, with a maximum of 34°C (93°F).
• The lowest daytime temperature in September was 24°C (75°F), recorded on September 26, 2010.
• Nighttime temperatures dropped to 17°C (63°F) on September 10, 2011, marking the coldest September night on record.
• The heaviest September precipitation occurred on September 15, 2016, when 158 mm (6.2 in) of precipitation fell.

What to Wear in Antiguo Cuscatlán in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Antiguo Cuscatlán in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit El Salvador, check out our Antiguo Cuscatlán's climate page.

More climate data for Antiguo Cuscatlán

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Antiguo Cuscatlán climate overview or explore weather in El Salvador.