Plattsburgh climate

Plattsburgh Weather in September

NOAA 1991-2020 normals for Plattsburgh Intl AP, 5.7 km from Plattsburgh

Average highs run from 76°F on September 1 to 64°F on September 30, and lows from 53°F to 44°F. Normal precipitation for the month is 3.11 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 Plattsburgh, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
71°F
Average low
49°F
Precipitation
3.11 in
Record high
94°FSep 3, 2018
Record low
28°FSep 21, 2020
Chance of a freeze
29%
Days of 90°F or more
0.6
Daylight
13 h 14 min to 11 h 45 min
Cloud cover
58%
Humidity
76%
Dew point
51°F
Wind
4.9 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 176°F53°F89°F 201043°F 200938%0%
Sep 276°F53°F90°F 201041°F 201738%0%
Sep 376°F53°F94°F 201841°F 201738%0%
Sep 475°F52°F84°F 201148°F 202538%0%
Sep 575°F52°F90°F 201845°F 200738%0%
Sep 675°F52°F87°F 202339°F 201338%0%
Sep 774°F51°F93°F 201545°F 200938%0%
Sep 874°F51°F91°F 200744°F 201338%0%
Sep 974°F51°F90°F 201539°F 201338%0%
Sep 1073°F51°F84°F 201642°F 201838%0%
Sep 1173°F50°F93°F 201337°F 200838%0%
Sep 1272°F50°F83°F 201137°F 202038%0%
Sep 1372°F50°F84°F 201637°F 201438%0%
Sep 1472°F49°F84°F 202438°F 201438%0%
Sep 1571°F49°F83°F 200834°F 201438%0%
Sep 1671°F49°F83°F 202437°F 200738%0%
Sep 1770°F48°F84°F 201835°F 200739%0%
Sep 1870°F48°F82°F 201535°F 202039%0%
Sep 1970°F48°F83°F 201530°F 201439%0%
Sep 2069°F47°F86°F 201631°F 202039%0%
Sep 2169°F47°F84°F 201628°F 202040%0%
Sep 2268°F47°F85°F 200730°F 202040%0%
Sep 2368°F46°F82°F 202132°F 200840%0%
Sep 2467°F46°F86°F 201739°F 201241%0%
Sep 2567°F46°F91°F 200737°F 201241%0%
Sep 2666°F45°F85°F 200733°F 200941%0%
Sep 2766°F45°F89°F 201735°F 201541%0%
Sep 2865°F45°F79°F 202536°F 201242%0%
Sep 2965°F44°F82°F 202537°F 202242%0%
Sep 3064°F44°F72°F 202433°F 202242%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Plattsburgh, 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 6:16 AM, sunset 7:30 PM
September 30
sunrise 6:51 AM, sunset 6:36 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00064776 (Plattsburgh Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00064776, 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.