Sunapee climate

Sunapee Weather in September

NOAA 1991-2020 normals for Mt Sunapee, 6.2 km from Sunapee

Average highs run from 75°F on September 1 to 64°F on September 30, and lows from 55°F to 45°F. Normal precipitation for the month is 4.18 in over about 10 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 Sunapee, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
70°F
Average low
50°F
Precipitation
4.18 in
Record high
95°FSep 1, 2010
Record low
20°FSep 24, 1963
Chance of a freeze
19%
Daylight
13 h 11 min to 11 h 46 min
Cloud cover
56%
Humidity
81%
Dew point
52°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 175°F55°F95°F 201038°F 197032%0%
Sep 275°F55°F94°F 201036°F 201732%0%
Sep 375°F54°F92°F 199938°F 197032%0%
Sep 475°F54°F91°F 199939°F 196332%0%
Sep 574°F54°F91°F 201834°F 200032%0%
Sep 674°F54°F93°F 202335°F 196232%0%
Sep 774°F53°F92°F 202333°F 196233%0%
Sep 873°F53°F92°F 200239°F 196233%0%
Sep 973°F53°F95°F 200236°F 201333%0%
Sep 1073°F52°F93°F 200234°F 197833%0%
Sep 1172°F52°F93°F 201334°F 196333%0%
Sep 1272°F52°F88°F 198236°F 196533%0%
Sep 1372°F51°F87°F 198232°F 196334%0%
Sep 1471°F51°F87°F 200528°F 196334%0%
Sep 1571°F51°F85°F 202431°F 196334%0%
Sep 1670°F50°F88°F 201830°F 196434%0%
Sep 1770°F50°F86°F 201834°F 201334%0%
Sep 1870°F49°F86°F 201834°F 202034%0%
Sep 1969°F49°F87°F 202429°F 202035%0%
Sep 2069°F49°F90°F 198328°F 197935%0%
Sep 2168°F48°F89°F 196527°F 196235%0%
Sep 2268°F48°F90°F 196528°F 202035%0%
Sep 2367°F47°F86°F 201727°F 196336%0%
Sep 2467°F47°F92°F 201720°F 196336%0%
Sep 2566°F47°F90°F 201724°F 196336%0%
Sep 2666°F46°F89°F 201730°F 196636%0%
Sep 2765°F46°F89°F 201726°F 196537%0%
Sep 2865°F45°F86°F 202524°F 196537%0%
Sep 2964°F45°F83°F 202525°F 200037%0%
Sep 3064°F45°F82°F 198628°F 198137%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sunapee, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:12 AM, sunset 7:23 PM
September 30
sunrise 6:45 AM, sunset 6:31 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00275629 (Mt Sunapee), public domain. Records: NOAA GHCN-Daily, station USW00094765, 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.