Brook climate

Brook Weather in September

NOAA 1991-2020 normals for Rensselaer, 17.1 km from Brook

Average highs run from 81°F on September 1 to 72°F on September 30, and lows from 59°F to 47°F. Normal precipitation for the month is 3.24 in over about 9 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 Brook, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
77°F
Average low
53°F
Precipitation
3.24 in
Record high
97°FSep 11, 2013
Record low
30°FSep 22, 1995
Chance of a freeze
6%
Days of 90°F or more
2.4
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
50%
Humidity
71%
Dew point
55°F
Wind
8.7 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 181°F59°F93°F 200047°F 200929%0%
Sep 281°F58°F94°F 200044°F 201729%0%
Sep 381°F58°F95°F 202643°F 197429%0%
Sep 481°F58°F96°F 202640°F 197429%0%
Sep 581°F57°F96°F 202642°F 197429%0%
Sep 680°F57°F96°F 199842°F 198429%0%
Sep 780°F57°F94°F 199039°F 202529%0%
Sep 880°F56°F93°F 198538°F 198629%0%
Sep 980°F56°F91°F 198541°F 202429%0%
Sep 1079°F56°F95°F 198342°F 197230%0%
Sep 1179°F55°F97°F 201344°F 197030%0%
Sep 1279°F55°F95°F 201343°F 197030%0%
Sep 1378°F55°F92°F 199138°F 197530%0%
Sep 1478°F54°F92°F 199138°F 197530%0%
Sep 1578°F54°F91°F 199139°F 200730%0%
Sep 1677°F53°F95°F 202637°F 198430%0%
Sep 1777°F53°F90°F 201837°F 198430%0%
Sep 1877°F52°F92°F 201840°F 198430%0%
Sep 1976°F52°F90°F 198335°F 201230%0%
Sep 2076°F51°F91°F 199835°F 199130%0%
Sep 2176°F51°F95°F 201836°F 199130%0%
Sep 2275°F51°F92°F 201030°F 199531%0%
Sep 2375°F50°F94°F 201730°F 197431%0%
Sep 2474°F50°F93°F 201731°F 201231%0%
Sep 2574°F49°F92°F 200734°F 201231%0%
Sep 2674°F49°F91°F 199836°F 200031%0%
Sep 2773°F48°F90°F 199832°F 199131%0%
Sep 2873°F48°F86°F 199934°F 199131%0%
Sep 2972°F48°F87°F 198633°F 199332%0%
Sep 3072°F47°F88°F 202533°F 198432%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Brook, 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 (CDT).

September 1
sunrise 6:16 AM, sunset 7:22 PM
September 30
sunrise 6:45 AM, sunset 6:33 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00127298 (Rensselaer), public domain. Records: NOAA GHCN-Daily, station USC00127298, 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.