Llano Weather in September
Average highs run from 94°F on September 1 to 87°F on September 30, and lows from 70°F to 61°F. Normal precipitation for the month is 2.34 in over about 5 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
- 66°F
- Precipitation
- 2.34 in
- Record high
- 112°FSep 28, 1953
- Record low
- 35°FSep 27, 1942
- Chance of a freeze
- 0%
- Days of 90°F or more
- 18.4
- Daylight
- 12 h 47 min to 11 h 53 min
- Cloud cover
- 42%
- Humidity
- 62%
- Dew point
- 62°F
- Wind
- 8.5 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 | 94°F | 70°F | 109°F 1952 | 56°F 1915 | 18% | 0% |
| Sep 2 | 94°F | 70°F | 109°F 1952 | 55°F 1915 | 18% | 0% |
| Sep 3 | 94°F | 70°F | 107°F 1939 | 56°F 1915 | 18% | 0% |
| Sep 4 | 93°F | 69°F | 106°F 1985 | 55°F 1928 | 18% | 0% |
| Sep 5 | 93°F | 69°F | 107°F 2000 | 49°F 1934 | 18% | 0% |
| Sep 6 | 93°F | 69°F | 110°F 2000 | 45°F 1984 | 18% | 0% |
| Sep 7 | 93°F | 68°F | 105°F 1951 | 49°F 2011 | 18% | 0% |
| Sep 8 | 92°F | 68°F | 105°F 2023 | 50°F 2017 | 18% | 0% |
| Sep 9 | 92°F | 68°F | 108°F 2023 | 52°F 1956 | 18% | 0% |
| Sep 10 | 92°F | 68°F | 104°F 1937 | 49°F 1968 | 17% | 0% |
| Sep 11 | 92°F | 67°F | 105°F 1950 | 49°F 1968 | 17% | 0% |
| Sep 12 | 91°F | 67°F | 102°F 1930 | 49°F 1960 | 17% | 0% |
| Sep 13 | 91°F | 67°F | 103°F 2011 | 52°F 1940 | 17% | 0% |
| Sep 14 | 91°F | 66°F | 104°F 2011 | 48°F 1945 | 17% | 0% |
| Sep 15 | 91°F | 66°F | 102°F 1965 | 49°F 1945 | 17% | 0% |
| Sep 16 | 90°F | 66°F | 101°F 1965 | 49°F 1934 | 17% | 0% |
| Sep 17 | 90°F | 65°F | 101°F 1933 | 47°F 1979 | 17% | 0% |
| Sep 18 | 90°F | 65°F | 102°F 1933 | 47°F 1981 | 17% | 0% |
| Sep 19 | 90°F | 65°F | 102°F 1933 | 43°F 1981 | 17% | 0% |
| Sep 20 | 89°F | 64°F | 103°F 1933 | 43°F 1981 | 17% | 0% |
| Sep 21 | 89°F | 64°F | 104°F 1926 | 41°F 1971 | 17% | 0% |
| Sep 22 | 89°F | 64°F | 107°F 1926 | 39°F 1983 | 17% | 0% |
| Sep 23 | 89°F | 63°F | 105°F 1920 | 39°F 1999 | 17% | 0% |
| Sep 24 | 88°F | 63°F | 103°F 1920 | 42°F 1975 | 17% | 0% |
| Sep 25 | 88°F | 63°F | 105°F 1931 | 42°F 2007 | 16% | 0% |
| Sep 26 | 88°F | 62°F | 109°F 2005 | 43°F 1975 | 16% | 0% |
| Sep 27 | 88°F | 62°F | 109°F 2005 | 35°F 1942 | 16% | 0% |
| Sep 28 | 87°F | 61°F | 112°F 1953 | 40°F 1942 | 16% | 0% |
| Sep 29 | 87°F | 61°F | 108°F 2005 | 42°F 1942 | 17% | 0% |
| Sep 30 | 87°F | 61°F | 102°F 1953 | 39°F 1972 | 17% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 7:11 AM, sunset 7:58 PM
- September 30
- sunrise 7:28 AM, sunset 7:21 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415272 (Llano), public domain. Records: NOAA GHCN-Daily, station USC00415272, 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.