Rosemount climate

Rosemount Weather in September

NOAA 1991-2020 normals for Rosemount Rsch & Outreach Ctr, 3.3 km from Rosemount

Average highs run from 77°F on September 1 to 67°F on September 30, and lows from 55°F to 44°F. Normal precipitation for the month is 3.44 in.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Rosemount, 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
50°F
Precipitation
3.44 in
Record high
103°FSep 10, 1931
Record low
20°FSep 30, 1899
Chance of a freeze
29%
Days of 90°F or more
0.6
Daylight
13 h 14 min to 11 h 46 min
Cloud cover
53%
Humidity
70%
Dew point
51°F
Wind
10.3 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°F55°F96°F 193736°F 19740%
Sep 276°F55°F98°F 189838°F 18930%
Sep 376°F55°F100°F 192533°F 19740%
Sep 476°F55°F99°F 192537°F 19740%
Sep 576°F54°F96°F 191238°F 19740%
Sep 675°F54°F96°F 189337°F 18980%
Sep 775°F54°F96°F 197637°F 18950%
Sep 875°F53°F100°F 193138°F 18980%
Sep 975°F53°F96°F 189328°F 18980%
Sep 1074°F53°F103°F 193128°F 18980%
Sep 1174°F52°F97°F 193127°F 18980%
Sep 1274°F52°F97°F 194833°F 19750%
Sep 1373°F51°F93°F 193134°F 19020%
Sep 1473°F51°F95°F 193931°F 20070%
Sep 1573°F51°F96°F 194833°F 20070%
Sep 1672°F50°F95°F 194830°F 19370%
Sep 1772°F50°F96°F 189530°F 19800%
Sep 1872°F49°F90°F 193028°F 19290%
Sep 1971°F49°F96°F 189527°F 18960%
Sep 2071°F48°F92°F 202227°F 18960%
Sep 2171°F48°F96°F 193733°F 19180%
Sep 2270°F48°F95°F 193626°F 19130%
Sep 2370°F47°F94°F 193725°F 19830%
Sep 2469°F47°F91°F 193531°F 19760%
Sep 2569°F46°F89°F 195625°F 18930%
Sep 2669°F46°F87°F 197422°F 19280%
Sep 2768°F45°F88°F 195627°F 19120%
Sep 2868°F45°F92°F 189824°F 18930%
Sep 2967°F44°F91°F 189826°F 19080%
Sep 3067°F44°F88°F 189720°F 18990%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Rosemount, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:35 AM, sunset 7:49 PM
September 30
sunrise 7:09 AM, sunset 6:55 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00217107 (Rosemount Rsch & Outreach Ctr), public domain. Records: NOAA GHCN-Daily, station USC00212737, 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.