Clinton climate

Clinton Weather in September

NOAA 1991-2020 normals for Rockville, 18.5 km from Clinton

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 58°F to 47°F. Normal precipitation for the month is 3.14 in over about 6 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 Clinton, 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
53°F
Precipitation
3.14 in
Record high
105°FSep 5, 1954
Record low
24°FSep 30, 1899
Chance of a freeze
11%
Days of 90°F or more
3.0
Daylight
13 h 03 min to 11 h 48 min
Cloud cover
46%
Humidity
69%
Dew point
56°F
Wind
8.1 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°F58°F101°F 195346°F 191922%0%
Sep 283°F57°F102°F 195341°F 190922%0%
Sep 383°F57°F101°F 191338°F 190822%0%
Sep 483°F57°F104°F 195443°F 192822%0%
Sep 582°F56°F105°F 195444°F 192822%0%
Sep 682°F56°F103°F 189941°F 192421%0%
Sep 782°F56°F102°F 189943°F 195621%0%
Sep 882°F56°F101°F 189938°F 198621%0%
Sep 981°F55°F99°F 192543°F 202521%0%
Sep 1081°F55°F99°F 193138°F 192421%0%
Sep 1181°F55°F98°F 189535°F 191721%0%
Sep 1281°F54°F101°F 189536°F 195521%0%
Sep 1380°F54°F101°F 189536°F 190221%0%
Sep 1480°F53°F102°F 193932°F 192321%0%
Sep 1580°F53°F102°F 193935°F 192321%0%
Sep 1679°F53°F97°F 193933°F 191621%0%
Sep 1779°F52°F95°F 192735°F 193722%0%
Sep 1879°F52°F97°F 189535°F 190122%0%
Sep 1978°F52°F101°F 189534°F 192922%0%
Sep 2078°F51°F98°F 189531°F 199122%0%
Sep 2178°F51°F96°F 195534°F 191822%0%
Sep 2277°F50°F95°F 193635°F 191822%0%
Sep 2377°F50°F94°F 201733°F 198323%0%
Sep 2477°F50°F94°F 201031°F 192823%0%
Sep 2576°F49°F94°F 190535°F 194223%0%
Sep 2676°F49°F94°F 189727°F 192823%0%
Sep 2775°F48°F94°F 199834°F 191823%0%
Sep 2875°F48°F95°F 193927°F 194223%0%
Sep 2975°F48°F99°F 195331°F 189923%0%
Sep 3074°F47°F92°F 197124°F 189924%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Clinton, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 7:18 AM, sunset 8:21 PM
September 30
sunrise 7:45 AM, sunset 7:33 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00127522 (Rockville), public domain. Records: NOAA GHCN-Daily, station USC00116610, 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.