Lower Brule climate

Lower Brule Weather in September

NOAA 1991-2020 normals for Lake Sharpe Prj, 9.8 km from Lower Brule

Average highs run from 83°F on September 1 to 72°F on September 30, and lows from 55°F to 43°F. Normal precipitation for the month is 2.01 in over about 6 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 Lower Brule, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
50°F
Precipitation
2.01 in
Record high
103°FSep 2, 2023
Record low
29°FSep 24, 2000
Chance of a freeze
29%
Days of 90°F or more
4.3
Daylight
13 h 12 min to 11 h 46 min
Cloud cover
50%
Humidity
58%
Dew point
48°F
Wind
11.2 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 183°F55°F102°F 201250°F 201023%0%
Sep 283°F55°F103°F 202348°F 200823%0%
Sep 383°F55°F102°F 202342°F 200823%0%
Sep 482°F54°F103°F 200143°F 202523%0%
Sep 582°F54°F101°F 199842°F 202522%0%
Sep 682°F54°F97°F 200338°F 202522%0%
Sep 782°F53°F96°F 200237°F 202522%0%
Sep 881°F53°F99°F 202237°F 202022%0%
Sep 981°F52°F100°F 200537°F 202022%0%
Sep 1081°F52°F101°F 199839°F 202022%0%
Sep 1180°F52°F95°F 200541°F 202322%0%
Sep 1280°F51°F101°F 200443°F 200022%0%
Sep 1380°F51°F94°F 200042°F 199922%0%
Sep 1479°F50°F94°F 202234°F 200722%0%
Sep 1579°F50°F94°F 201237°F 201122%0%
Sep 1679°F50°F96°F 200340°F 202322%0%
Sep 1778°F49°F97°F 200036°F 201222%0%
Sep 1878°F49°F98°F 201337°F 201222%0%
Sep 1977°F48°F94°F 202337°F 200622%0%
Sep 2077°F48°F95°F 200735°F 200622%0%
Sep 2176°F47°F91°F 200539°F 199922%0%
Sep 2276°F47°F90°F 201330°F 201222%0%
Sep 2375°F46°F94°F 200735°F 200022%0%
Sep 2475°F46°F84°F 201229°F 200022%0%
Sep 2574°F45°F89°F 200833°F 200022%0%
Sep 2674°F45°F89°F 202438°F 200022%0%
Sep 2773°F44°F90°F 202132°F 199922%0%
Sep 2873°F44°F95°F 201135°F 200622%0%
Sep 2972°F44°F90°F 200734°F 199922%0%
Sep 3072°F43°F90°F 201331°F 200321%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Lower Brule, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 7:02 AM, sunset 8:14 PM
September 30
sunrise 7:35 AM, sunset 7:21 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00394766 (Lake Sharpe Prj), public domain. Records: NOAA GHCN-Daily, station USW00094943, 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.