Gretna climate

Gretna Weather in September

NOAA 1991-2020 normals for Chatham, 15.4 km from Gretna

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 61°F to 50°F. Normal precipitation for the month is 5.00 in over about 9 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Gretna, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
79°F
Average low
56°F
Precipitation
5.00 in
Record high
102°FSep 5, 2026
Record low
31°FSep 22, 2006
Chance of a freeze
0%
Days of 90°F or more
1.6
Daylight
12 h 58 min to 11 h 50 min
Cloud cover
55%
Humidity
71%
Dew point
58°F
Wind
3.6 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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 183°F61°F96°F 197745°F 202530%0%
Sep 283°F60°F99°F 198045°F 202530%0%
Sep 383°F60°F100°F 202646°F 202530%0%
Sep 482°F60°F100°F 202645°F 199730%0%
Sep 582°F60°F102°F 202640°F 199730%0%
Sep 682°F59°F95°F 198339°F 199729%0%
Sep 782°F59°F98°F 199841°F 199729%0%
Sep 881°F59°F99°F 199844°F 199729%0%
Sep 981°F58°F96°F 201643°F 202429%0%
Sep 1081°F58°F95°F 197841°F 199829%0%
Sep 1180°F58°F98°F 198341°F 199829%0%
Sep 1280°F58°F99°F 198342°F 199829%0%
Sep 1380°F57°F96°F 198340°F 200229%0%
Sep 1480°F57°F97°F 199835°F 198529%0%
Sep 1579°F57°F97°F 198035°F 198529%0%
Sep 1679°F56°F95°F 199836°F 198529%0%
Sep 1779°F56°F96°F 199836°F 200029%0%
Sep 1878°F55°F94°F 199836°F 200029%0%
Sep 1978°F55°F94°F 197841°F 200429%0%
Sep 2078°F55°F94°F 197839°F 202029%0%
Sep 2177°F54°F92°F 199733°F 200629%0%
Sep 2277°F54°F92°F 198031°F 200630%0%
Sep 2377°F53°F94°F 198035°F 199930%0%
Sep 2476°F53°F91°F 200735°F 199930%0%
Sep 2576°F53°F91°F 201935°F 198330%0%
Sep 2676°F52°F90°F 198433°F 200130%0%
Sep 2775°F52°F94°F 199833°F 200130%0%
Sep 2875°F51°F97°F 199835°F 200130%0%
Sep 2975°F51°F95°F 199835°F 200130%0%
Sep 3074°F50°F93°F 201933°F 200330%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Gretna, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:48 AM, sunset 7:46 PM
September 30
sunrise 7:12 AM, sunset 7:02 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00441614 (Chatham), public domain. Records: NOAA GHCN-Daily, station USC00441082, 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.