Grassflat climate

Grassflat Weather in September

NOAA 1991-2020 normals for Clarence, 15.4 km from Grassflat

Average highs run from 79°F on September 1 to 69°F on September 30, and lows from 48°F to 40°F. Normal precipitation for the month is 4.45 in over about 12 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 Grassflat, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
74°F
Average low
44°F
Precipitation
4.45 in
Record high
93°FSep 9, 2002
Record low
30°FSep 22, 2020
Chance of a freeze
61%
Days of 90°F or more
0.7
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
60%
Humidity
72%
Dew point
51°F
Wind
3.8 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 179°F48°F89°F 201039°F 200936%0%
Sep 279°F48°F91°F 201043°F 200936%0%
Sep 378°F48°F91°F 201141°F 202436%0%
Sep 478°F47°F90°F 201844°F 202436%0%
Sep 578°F47°F91°F 201840°F 200036%0%
Sep 678°F47°F89°F 200737°F 200036%0%
Sep 777°F47°F90°F 201537°F 200036%0%
Sep 877°F46°F91°F 201534°F 202536%0%
Sep 977°F46°F93°F 200238°F 202537%0%
Sep 1077°F46°F91°F 200238°F 201737%0%
Sep 1176°F45°F89°F 201339°F 201037%0%
Sep 1276°F45°F85°F 200542°F 201237%0%
Sep 1376°F45°F85°F 200540°F 200737%0%
Sep 1475°F44°F87°F 200540°F 201437%0%
Sep 1575°F44°F84°F 200535°F 200137%0%
Sep 1675°F44°F86°F 202635°F 201138%0%
Sep 1774°F44°F83°F 201534°F 200738%0%
Sep 1874°F43°F86°F 202533°F 201338%0%
Sep 1974°F43°F86°F 202532°F 202038%0%
Sep 2073°F43°F84°F 200231°F 202038%0%
Sep 2173°F42°F85°F 201831°F 202039%0%
Sep 2272°F42°F85°F 200730°F 202039%0%
Sep 2372°F42°F88°F 201737°F 201439%0%
Sep 2471°F42°F89°F 201735°F 201339%0%
Sep 2571°F41°F89°F 201732°F 201239%0%
Sep 2671°F41°F88°F 201739°F 201339%0%
Sep 2770°F41°F89°F 201738°F 201940%0%
Sep 2870°F40°F83°F 202534°F 200040%0%
Sep 2969°F40°F76°F 201431°F 200040%0%
Sep 3069°F40°F80°F 202531°F 200040%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Grassflat, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:39 AM, sunset 7:45 PM
September 30
sunrise 7:08 AM, sunset 6:56 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00361480 (Clarence), public domain. Records: NOAA GHCN-Daily, station USW00054792, 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.