Forsyth County climate

Forsyth County Weather in September

NOAA 1991-2020 normals for Cumming 2N, 0.4 km from Forsyth County

Average highs run from 86°F on September 1 to 78°F on September 30, and lows from 64°F to 55°F. Normal precipitation for the month is 4.03 in over about 8 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 Forsyth County, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
82°F
Average low
60°F
Precipitation
4.03 in
Record high
97°FSep 2, 2011
Record low
44°FSep 26, 2001
Chance of a freeze
0%
Days of 90°F or more
3.9
Daylight
12 h 52 min to 11 h 52 min
Cloud cover
51%
Humidity
72%
Dew point
61°F
Wind
4.3 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 186°F64°F94°F 202659°F 199928%0%
Sep 286°F64°F97°F 201160°F 201727%0%
Sep 386°F64°F95°F 202657°F 201727%0%
Sep 485°F64°F95°F 201956°F 201727%0%
Sep 585°F63°F97°F 202655°F 199727%0%
Sep 685°F63°F94°F 202654°F 199727%0%
Sep 785°F63°F93°F 199952°F 201726%0%
Sep 884°F63°F94°F 199954°F 201726%0%
Sep 984°F62°F96°F 201955°F 199826%0%
Sep 1084°F62°F95°F 200254°F 199826%0%
Sep 1184°F62°F93°F 200256°F 199826%0%
Sep 1283°F61°F96°F 201955°F 201726%0%
Sep 1383°F61°F95°F 201953°F 201526%0%
Sep 1483°F61°F94°F 201850°F 201526%0%
Sep 1583°F60°F93°F 201653°F 199626%0%
Sep 1682°F60°F95°F 201952°F 200026%0%
Sep 1782°F60°F96°F 201952°F 199926%0%
Sep 1882°F59°F90°F 201854°F 200126%0%
Sep 1981°F59°F91°F 199752°F 200426%0%
Sep 2081°F59°F93°F 201051°F 202026%0%
Sep 2181°F58°F92°F 201051°F 202027%0%
Sep 2281°F58°F94°F 202450°F 202027%0%
Sep 2380°F58°F92°F 202448°F 199927%0%
Sep 2480°F57°F91°F 200749°F 199927%0%
Sep 2580°F57°F91°F 201648°F 200127%0%
Sep 2679°F56°F92°F 201944°F 200127%0%
Sep 2779°F56°F93°F 201946°F 200127%0%
Sep 2879°F56°F90°F 201746°F 202227%0%
Sep 2978°F55°F92°F 201944°F 200327%0%
Sep 3078°F55°F94°F 201947°F 200127%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Forsyth County, 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 7:10 AM, sunset 8:02 PM
September 30
sunrise 7:30 AM, sunset 7:22 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00092408 (Cumming 2N), public domain. Records: NOAA GHCN-Daily, station USW00053838, 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.