San Carlos Weather in September
Average highs run from 32°C on September 1 to 31°C on September 30, and lows from 24°C to 24°C. Normal precipitation for the month is 168 mm over about 24 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
- 32°C
- Average low
- 24°C
- Precipitation
- 168 mm
- Record high
- 39°CSep 18, 1965
- Record low
- 18°CSep 17, 1975
- Daylight
- 12 h 17 min to 12 h 03 min
- Cloud cover
- 82%
- Humidity
- 85%
- Dew point
- 24°C
- Wind
- 4.0 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 | 32°C | 24°C | 38°C 1965 | 21°C 1968 | 85% |
| Sep 2 | 32°C | 24°C | 36°C 1967 | 20°C 1976 | 84% |
| Sep 3 | 32°C | 24°C | 34°C 1978 | 21°C 2019 | 84% |
| Sep 4 | 32°C | 24°C | 37°C 1965 | 20°C 1967 | 85% |
| Sep 5 | 32°C | 24°C | 34°C 2015 | 22°C 1965 | 85% |
| Sep 6 | 32°C | 24°C | 36°C 1967 | 21°C 2019 | 85% |
| Sep 7 | 32°C | 24°C | 38°C 1965 | 20°C 1974 | 85% |
| Sep 8 | 32°C | 24°C | 38°C 1965 | 22°C 1968 | 84% |
| Sep 9 | 32°C | 24°C | 34°C 1973 | 23°C 2017 | 85% |
| Sep 10 | 32°C | 24°C | 37°C 1965 | 22°C 2010 | 85% |
| Sep 11 | 32°C | 24°C | 36°C 2019 | 22°C 1974 | 85% |
| Sep 12 | 32°C | 24°C | 36°C 1965 | 21°C 1970 | 85% |
| Sep 13 | 32°C | 24°C | 37°C 1966 | 21°C 1970 | 85% |
| Sep 14 | 32°C | 24°C | 38°C 1965 | 22°C 2001 | 84% |
| Sep 15 | 32°C | 24°C | 36°C 1965 | 21°C 1966 | 84% |
| Sep 16 | 32°C | 24°C | 37°C 1967 | 21°C 1976 | 84% |
| Sep 17 | 31°C | 24°C | 36°C 2015 | 18°C 1975 | 85% |
| Sep 18 | 31°C | 24°C | 39°C 1965 | 21°C 2012 | 85% |
| Sep 19 | 31°C | 24°C | 34°C 2005 | 22°C 1973 | 85% |
| Sep 20 | 31°C | 24°C | 34°C 2015 | 21°C 1974 | 85% |
| Sep 21 | 31°C | 24°C | 35°C 1973 | 21°C 2019 | 84% |
| Sep 22 | 31°C | 24°C | 36°C 2024 | 19°C 1974 | 84% |
| Sep 23 | 31°C | 24°C | 36°C 1965 | 21°C 1973 | 85% |
| Sep 24 | 31°C | 24°C | 37°C 1966 | 20°C 2012 | 85% |
| Sep 25 | 31°C | 24°C | 33°C 2020 | 21°C 2020 | 84% |
| Sep 26 | 31°C | 24°C | 34°C 2019 | 21°C 1999 | 84% |
| Sep 27 | 31°C | 24°C | 37°C 1966 | 21°C 2018 | 83% |
| Sep 28 | 31°C | 24°C | 39°C 1965 | 19°C 1970 | 82% |
| Sep 29 | 31°C | 24°C | 36°C 2015 | 21°C 2011 | 81% |
| Sep 30 | 31°C | 24°C | 35°C 1964 | 20°C 1974 | 80% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- September 1
- sunrise 5:54 AM, sunset 6:11 PM
- September 30
- sunrise 5:51 AM, sunset 5:54 PM
Other months
Sources
Records: NOAA GHCN-Daily, station COM00080063, 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.