Pierre Part Weather in September
Average highs run from 90°F on September 1 to 85°F on September 30, and lows from 72°F to 65°F. Normal precipitation for the month is 5.39 in over about 9 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
- 88°F
- Average low
- 69°F
- Precipitation
- 5.39 in
- Record high
- 99°FSep 2, 1964
- Record low
- 46°FSep 30, 1967
- Chance of a freeze
- 0%
- Days of 90°F or more
- 12.8
- Daylight
- 12 h 45 min to 11 h 53 min
- Cloud cover
- 46%
- Humidity
- 79%
- Dew point
- 71°F
- Wind
- 7.2 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 | 90°F | 72°F | 98°F 1940 | 63°F 1936 | 37% | 0% |
| Sep 2 | 90°F | 72°F | 99°F 1964 | 62°F 1954 | 36% | 0% |
| Sep 3 | 90°F | 72°F | 98°F 1964 | 61°F 1999 | 36% | 0% |
| Sep 4 | 89°F | 72°F | 98°F 2000 | 60°F 1952 | 36% | 0% |
| Sep 5 | 89°F | 72°F | 99°F 2000 | 58°F 1952 | 35% | 0% |
| Sep 6 | 89°F | 71°F | 97°F 1925 | 58°F 1934 | 35% | 0% |
| Sep 7 | 89°F | 71°F | 99°F 2019 | 61°F 1950 | 34% | 0% |
| Sep 8 | 89°F | 71°F | 97°F 1963 | 60°F 1932 | 34% | 0% |
| Sep 9 | 89°F | 71°F | 97°F 2019 | 63°F 1934 | 33% | 0% |
| Sep 10 | 89°F | 71°F | 98°F 1940 | 62°F 1996 | 33% | 0% |
| Sep 11 | 88°F | 71°F | 98°F 1980 | 59°F 1943 | 32% | 0% |
| Sep 12 | 88°F | 70°F | 98°F 1980 | 54°F 1940 | 32% | 0% |
| Sep 13 | 88°F | 70°F | 99°F 1970 | 53°F 1940 | 31% | 0% |
| Sep 14 | 88°F | 70°F | 98°F 1970 | 55°F 1940 | 31% | 0% |
| Sep 15 | 88°F | 70°F | 96°F 1931 | 58°F 1940 | 30% | 0% |
| Sep 16 | 88°F | 69°F | 98°F 1933 | 56°F 1940 | 30% | 0% |
| Sep 17 | 88°F | 69°F | 98°F 1933 | 56°F 1961 | 29% | 0% |
| Sep 18 | 87°F | 69°F | 98°F 1927 | 55°F 1961 | 29% | 0% |
| Sep 19 | 87°F | 69°F | 95°F 1933 | 57°F 1981 | 29% | 0% |
| Sep 20 | 87°F | 68°F | 96°F 1933 | 55°F 1938 | 28% | 0% |
| Sep 21 | 87°F | 68°F | 96°F 1924 | 55°F 1938 | 28% | 0% |
| Sep 22 | 87°F | 68°F | 96°F 1925 | 52°F 1983 | 27% | 0% |
| Sep 23 | 86°F | 67°F | 96°F 1925 | 50°F 1987 | 27% | 0% |
| Sep 24 | 86°F | 67°F | 97°F 1931 | 50°F 1927 | 27% | 0% |
| Sep 25 | 86°F | 67°F | 95°F 1930 | 52°F 1975 | 26% | 0% |
| Sep 26 | 86°F | 66°F | 94°F 1922 | 55°F 1940 | 26% | 0% |
| Sep 27 | 86°F | 66°F | 94°F 1945 | 51°F 1942 | 25% | 0% |
| Sep 28 | 85°F | 66°F | 94°F 1954 | 50°F 1942 | 25% | 0% |
| Sep 29 | 85°F | 65°F | 96°F 1953 | 47°F 1967 | 25% | 0% |
| Sep 30 | 85°F | 65°F | 95°F 1954 | 46°F 1967 | 24% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 6:42 AM, sunset 7:27 PM
- September 30
- sunrise 6:58 AM, sunset 6:51 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00162534 (Donaldsonville 4 Sw), public domain. Records: NOAA GHCN-Daily, station USC00166394, 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.