Alamo Weather in September
Average highs run from 96°F on September 1 to 85°F on September 30, and lows from 60°F to 49°F. Normal precipitation for the month is 0.26 in over about 1 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 91°F
- Average low
- 55°F
- Precipitation
- 0.26 in
- Record high
- 90°FSep 8, 1986
- Record low
- 17°FSep 17, 1996
- Chance of a freeze
- 0%
- Days of 90°F or more
- 20.1
- Daylight
- 12 h 58 min to 11 h 50 min
- Cloud cover
- 24%
- Humidity
- 28%
- Dew point
- 32°F
- Wind
- 7.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 96°F | 60°F | 87°F 1996 | 30°F 1993 | 6% | 0% |
| Sep 2 | 96°F | 60°F | 86°F 1950 | 36°F 1996 | 5% | 0% |
| Sep 3 | 95°F | 60°F | 87°F 1950 | 37°F 1999 | 5% | 0% |
| Sep 4 | 95°F | 59°F | 85°F 1989 | 33°F 1985 | 5% | 0% |
| Sep 5 | 95°F | 59°F | 86°F 2020 | 34°F 1992 | 5% | 0% |
| Sep 6 | 95°F | 59°F | 88°F 2020 | 32°F 1996 | 5% | 0% |
| Sep 7 | 94°F | 58°F | 87°F 1989 | 32°F 1996 | 5% | 0% |
| Sep 8 | 94°F | 58°F | 90°F 1986 | 33°F 1985 | 5% | 0% |
| Sep 9 | 94°F | 58°F | 85°F 1988 | 32°F 1995 | 5% | 0% |
| Sep 10 | 93°F | 57°F | 83°F 1987 | 31°F 1991 | 5% | 0% |
| Sep 11 | 93°F | 57°F | 85°F 1990 | 29°F 1991 | 5% | 0% |
| Sep 12 | 93°F | 57°F | 89°F 1987 | 28°F 1985 | 4% | 0% |
| Sep 13 | 92°F | 56°F | 84°F 1990 | 25°F 1994 | 4% | 0% |
| Sep 14 | 92°F | 56°F | 83°F 1990 | 21°F 1996 | 4% | 0% |
| Sep 15 | 92°F | 55°F | 82°F 1990 | 26°F 1996 | 4% | 0% |
| Sep 16 | 91°F | 55°F | 80°F 1949 | 25°F 1996 | 4% | 0% |
| Sep 17 | 91°F | 55°F | 82°F 2000 | 17°F 1996 | 4% | 0% |
| Sep 18 | 90°F | 54°F | 81°F 2000 | 22°F 1996 | 4% | 0% |
| Sep 19 | 90°F | 54°F | 81°F 1949 | 20°F 1996 | 4% | 0% |
| Sep 20 | 90°F | 53°F | 79°F 1949 | 25°F 1986 | 4% | 0% |
| Sep 21 | 89°F | 53°F | 80°F 1949 | 25°F 1986 | 4% | 0% |
| Sep 22 | 89°F | 53°F | 81°F 1949 | 23°F 1986 | 4% | 0% |
| Sep 23 | 88°F | 52°F | 80°F 1949 | 27°F 2017 | 4% | 0% |
| Sep 24 | 88°F | 52°F | 81°F 1949 | 25°F 1993 | 4% | 0% |
| Sep 25 | 87°F | 51°F | 78°F 1989 | 24°F 1993 | 4% | 0% |
| Sep 26 | 87°F | 51°F | 80°F 2020 | 24°F 1986 | 4% | 0% |
| Sep 27 | 86°F | 51°F | 82°F 2003 | 22°F 1996 | 4% | 0% |
| Sep 28 | 86°F | 50°F | 81°F 2003 | 27°F 1982 | 4% | 0% |
| Sep 29 | 85°F | 50°F | 82°F 2010 | 27°F 1986 | 4% | 0% |
| Sep 30 | 85°F | 49°F | 80°F 2010 | 17°F 1995 | 4% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:11 AM, sunset 7:09 PM
- September 30
- sunrise 6:35 AM, sunset 6:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00265880 (Pahranagat Wr), public domain. Records: NOAA GHCN-Daily, station USC00265400, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.