Port O'Connor Weather in September
Average highs run from 90°F on September 1 to 86°F on September 30, and lows from 77°F to 73°F.
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
- 88°F
- Average low
- 76°F
- Record high
- 107°FSep 5, 2000
- Record low
- 49°FSep 29, 1967
- Chance of a freeze
- 0%
- Days of 90°F or more
- 11.5
- Daylight
- 12 h 43 min to 11 h 54 min
- Cloud cover
- 47%
- Humidity
- 76%
- Dew point
- 73°F
- Wind
- 10.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 90°F | 77°F | 98°F 1954 | 67°F 1950 | |
| Sep 2 | 90°F | 77°F | 99°F 2011 | 67°F 1950 | |
| Sep 3 | 90°F | 77°F | 102°F 2011 | 64°F 1955 | |
| Sep 4 | 90°F | 77°F | 104°F 2000 | 61°F 1974 | |
| Sep 5 | 90°F | 77°F | 107°F 2000 | 54°F 1974 | |
| Sep 6 | 90°F | 77°F | 98°F 2000 | 55°F 1974 | |
| Sep 7 | 89°F | 77°F | 96°F 1993 | 58°F 2017 | |
| Sep 8 | 89°F | 77°F | 96°F 1951 | 60°F 2017 | |
| Sep 9 | 89°F | 76°F | 97°F 2021 | 59°F 1957 | |
| Sep 10 | 89°F | 76°F | 98°F 1951 | 60°F 2017 | |
| Sep 11 | 89°F | 76°F | 96°F 1944 | 61°F 2017 | |
| Sep 12 | 89°F | 76°F | 97°F 2004 | 57°F 2017 | |
| Sep 13 | 89°F | 76°F | 95°F 1980 | 60°F 1945 | |
| Sep 14 | 89°F | 76°F | 99°F 2019 | 58°F 1945 | |
| Sep 15 | 88°F | 76°F | 96°F 1954 | 57°F 1945 | |
| Sep 16 | 88°F | 76°F | 97°F 1953 | 57°F 1979 | |
| Sep 17 | 88°F | 75°F | 95°F 2026 | 56°F 1981 | |
| Sep 18 | 88°F | 75°F | 95°F 1947 | 53°F 1981 | |
| Sep 19 | 88°F | 75°F | 94°F 1947 | 52°F 1981 | |
| Sep 20 | 88°F | 75°F | 97°F 2016 | 57°F 1981 | |
| Sep 21 | 88°F | 75°F | 101°F 2005 | 53°F 1983 | |
| Sep 22 | 87°F | 75°F | 100°F 1944 | 52°F 1983 | |
| Sep 23 | 87°F | 75°F | 98°F 2005 | 52°F 1975 | |
| Sep 24 | 87°F | 74°F | 100°F 2005 | 52°F 1975 | |
| Sep 25 | 87°F | 74°F | 95°F 1954 | 50°F 1989 | |
| Sep 26 | 87°F | 74°F | 97°F 2022 | 50°F 2000 | |
| Sep 27 | 87°F | 74°F | 94°F 2007 | 52°F 2000 | |
| Sep 28 | 87°F | 74°F | 94°F 1949 | 50°F 1967 | |
| Sep 29 | 87°F | 73°F | 99°F 2005 | 49°F 1967 | |
| Sep 30 | 86°F | 73°F | 94°F 2025 | 49°F 1992 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 7:04 AM, sunset 7:47 PM
- September 30
- sunrise 7:18 AM, sunset 7:12 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417186 (Port O'connor), public domain. Records: NOAA GHCN-Daily, station USW00012935, 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.