Flandreau climate

Flandreau Weather in September

NOAA 1991-2020 normals for Flandreau, 0.3 km from Flandreau

Average highs run from 77°F on September 1 to 67°F on September 30, and lows from 53°F to 42°F. Normal precipitation for the month is 3.07 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 Flandreau, in °F, with the record for each date.020406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
72°F
Average low
48°F
Precipitation
3.07 in
Record high
103°FSep 4, 1925
Record low
15°FSep 26, 1984
Chance of a freeze
45%
Days of 90°F or more
0.5
Daylight
13 h 12 min to 11 h 46 min
Cloud cover
50%
Humidity
66%
Dew point
49°F
Wind
11.4 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 177°F53°F97°F 191335°F 197421%0%
Sep 276°F53°F97°F 192232°F 198721%0%
Sep 376°F53°F99°F 192522°F 197421%0%
Sep 476°F52°F103°F 192534°F 197421%0%
Sep 576°F52°F100°F 192532°F 198821%0%
Sep 675°F52°F100°F 192232°F 202521%0%
Sep 775°F51°F103°F 192230°F 198621%0%
Sep 875°F51°F101°F 193131°F 198721%0%
Sep 975°F51°F97°F 194730°F 191021%0%
Sep 1074°F50°F98°F 193132°F 198921%0%
Sep 1174°F50°F101°F 193131°F 198721%0%
Sep 1274°F49°F95°F 192727°F 190221%0%
Sep 1374°F49°F94°F 193927°F 198921%
Sep 1473°F49°F98°F 193932°F 194921%
Sep 1573°F48°F98°F 193923°F 191621%
Sep 1673°F48°F98°F 195529°F 190321%
Sep 1772°F47°F93°F 195521°F 191621%
Sep 1872°F47°F94°F 195527°F 191821%
Sep 1972°F47°F93°F 194022°F 191822%
Sep 2071°F46°F95°F 198425°F 191822%
Sep 2171°F46°F94°F 202226°F 198322%
Sep 2270°F45°F94°F 193719°F 197422%
Sep 2370°F45°F96°F 193621°F 198921%
Sep 2470°F44°F94°F 193525°F 194221%
Sep 2569°F44°F85°F 199022°F 192621%
Sep 2669°F43°F90°F 195615°F 198421%
Sep 2768°F43°F92°F 195619°F 198421%
Sep 2868°F43°F94°F 195615°F 189921%
Sep 2967°F42°F88°F 202118°F 198421%
Sep 3067°F42°F91°F 202521°F 193921%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Flandreau, 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 6:50 AM, sunset 8:02 PM
September 30
sunrise 7:23 AM, sunset 7:09 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00392984 (Flandreau), public domain. Records: NOAA GHCN-Daily, station USC00216565, 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.