Izalco Weather in September
Average highs run from 29°C on September 1 to 28°C on September 30, and lows from 25°C to 25°C. Normal precipitation for the month is 243 mm over about 27 wet days.
September day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 28°C
- Average low
- 25°C
- Precipitation
- 243 mm
- Record high
- 37°CSep 19, 1990
- Record low
- 18°CSep 15, 1983
- Daylight
- 12 h 23 min to 12 h 01 min
- Cloud cover
- 76%
- Humidity
- 82%
- Dew point
- 23°C
- Wind
- 10.1 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 29°C | 25°C | 34°C 1992 | 21°C 1986 | 89% |
| Sep 2 | 29°C | 25°C | 35°C 1987 | 22°C 1983 | 89% |
| Sep 3 | 29°C | 25°C | 36°C 1991 | 18°C 1983 | 89% |
| Sep 4 | 29°C | 25°C | 36°C 1990 | 20°C 1983 | 89% |
| Sep 5 | 29°C | 25°C | 36°C 1992 | 21°C 1987 | 89% |
| Sep 6 | 29°C | 25°C | 35°C 1990 | 21°C 1985 | 90% |
| Sep 7 | 29°C | 25°C | 34°C 2005 | 21°C 1991 | 90% |
| Sep 8 | 29°C | 25°C | 34°C 1991 | 19°C 1981 | 90% |
| Sep 9 | 29°C | 25°C | 35°C 1990 | 20°C 1981 | 91% |
| Sep 10 | 29°C | 25°C | 35°C 1990 | 20°C 1984 | 91% |
| Sep 11 | 29°C | 25°C | 35°C 1997 | 20°C 1983 | 91% |
| Sep 12 | 29°C | 25°C | 35°C 1997 | 18°C 1989 | 90% |
| Sep 13 | 29°C | 25°C | 35°C 2005 | 22°C 1986 | 90% |
| Sep 14 | 29°C | 25°C | 35°C 1989 | 20°C 1999 | 89% |
| Sep 15 | 29°C | 25°C | 35°C 1987 | 18°C 1983 | 90% |
| Sep 16 | 29°C | 25°C | 35°C 1992 | 21°C 2005 | 90% |
| Sep 17 | 29°C | 25°C | 35°C 1991 | 20°C 1999 | 90% |
| Sep 18 | 28°C | 25°C | 34°C 1990 | 20°C 2011 | 91% |
| Sep 19 | 28°C | 25°C | 37°C 1990 | 22°C 1982 | 93% |
| Sep 20 | 28°C | 25°C | 37°C 1987 | 18°C 1982 | 93% |
| Sep 21 | 28°C | 25°C | 34°C 1986 | 20°C 1982 | 94% |
| Sep 22 | 28°C | 25°C | 34°C 1998 | 21°C 1983 | 94% |
| Sep 23 | 28°C | 25°C | 35°C 1990 | 20°C 1983 | 94% |
| Sep 24 | 28°C | 25°C | 35°C 1990 | 22°C 1991 | 94% |
| Sep 25 | 28°C | 25°C | 35°C 1987 | 20°C 1982 | 94% |
| Sep 26 | 28°C | 25°C | 35°C 1962 | 22°C 1982 | 93% |
| Sep 27 | 28°C | 25°C | 36°C 1990 | 19°C 1999 | 92% |
| Sep 28 | 28°C | 25°C | 35°C 1990 | 20°C 1983 | 91% |
| Sep 29 | 28°C | 25°C | 36°C 1987 | 20°C 1983 | 91% |
| Sep 30 | 28°C | 25°C | 36°C 1987 | 20°C 1992 | 90% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- September 1
- sunrise 5:47 AM, sunset 6:10 PM
- September 30
- sunrise 5:48 AM, sunset 5:49 PM
Other months
Sources
Records: NOAA GHCN-Daily, station ES000078650, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.