Lake Mohegan climate

Lake Mohegan Weather in September

NOAA 1991-2020 normals for Shrub Oak, 1.8 km from Lake Mohegan

Average highs run from 80°F on September 1 to 70°F on September 30, and lows from 57°F to 48°F. Normal precipitation for the month is 4.60 in.

September day by day

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

Normal daily high and low temperature at Lake Mohegan, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
75°F
Average low
52°F
Precipitation
4.60 in
Record high
96°FSep 12, 1983
Record low
27°FSep 24, 1974
Chance of a freeze
4%
Days of 90°F or more
1.8
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
55%
Humidity
74%
Dew point
55°F
Wind
4.0 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 180°F57°F95°F 197342°F 19860%
Sep 279°F57°F93°F 201038°F 19910%
Sep 379°F56°F93°F 198040°F 19940%
Sep 479°F56°F93°F 197341°F 19750%
Sep 578°F56°F95°F 197340°F 19940%
Sep 678°F56°F90°F 197337°F 19840%
Sep 778°F55°F91°F 198334°F 19840%
Sep 878°F55°F87°F 198337°F 19840%
Sep 977°F55°F87°F 200237°F 19860%
Sep 1077°F54°F89°F 200234°F 19730%
Sep 1177°F54°F94°F 198333°F 19950%
Sep 1276°F54°F96°F 198335°F 19770%
Sep 1376°F53°F88°F 200534°F 19850%
Sep 1476°F53°F90°F 200534°F 19850%
Sep 1575°F53°F88°F 200531°F 19750%
Sep 1675°F52°F86°F 199333°F 19840%
Sep 1775°F52°F92°F 199130°F 19860%
Sep 1874°F52°F90°F 199133°F 19860%
Sep 1974°F51°F83°F 197734°F 19730%
Sep 2074°F51°F91°F 198329°F 19790%
Sep 2173°F51°F92°F 198330°F 19730%
Sep 2273°F50°F87°F 197832°F 19730%
Sep 2373°F50°F91°F 198035°F 19740%
Sep 2472°F50°F85°F 201027°F 19740%
Sep 2572°F49°F86°F 201030°F 19830%
Sep 2672°F49°F86°F 200732°F 19780%
Sep 2771°F49°F87°F 200731°F 19780%
Sep 2871°F48°F90°F 199831°F 19890%
Sep 2970°F48°F80°F 198729°F 19760%
Sep 3070°F48°F81°F 198730°F 19780%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Lake Mohegan, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:22 AM, sunset 7:28 PM
September 30
sunrise 6:51 AM, sunset 6:39 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00307742 (Shrub Oak), public domain. Records: NOAA GHCN-Daily, station USC00308906, 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.