Merrill climate

Merrill Weather in September

NOAA 1991-2020 normals for Merrill, 1.7 km from Merrill

Average highs run from 75°F on September 1 to 64°F on September 30, and lows from 52°F to 41°F. Normal precipitation for the month is 3.86 in over about 13 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 Merrill, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
70°F
Average low
46°F
Precipitation
3.86 in
Record high
97°FSep 8, 1933
Record low
18°FSep 22, 1974
Chance of a freeze
51%
Daylight
13 h 15 min to 11 h 45 min
Cloud cover
58%
Humidity
79%
Dew point
51°F
Wind
9.6 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 175°F52°F95°F 193731°F 190938%0%
Sep 275°F51°F95°F 191332°F 197438%0%
Sep 374°F51°F94°F 192927°F 197438%0%
Sep 474°F51°F95°F 202330°F 197438%0%
Sep 574°F50°F94°F 193331°F 197439%0%
Sep 673°F50°F95°F 193332°F 192439%0%
Sep 773°F50°F91°F 191330°F 198639%0%
Sep 873°F49°F97°F 193330°F 197939%0%
Sep 972°F49°F94°F 190627°F 197540%0%
Sep 1072°F49°F97°F 193128°F 191740%0%
Sep 1172°F48°F95°F 193128°F 194340%0%
Sep 1271°F48°F92°F 193129°F 195540%0%
Sep 1371°F47°F93°F 192729°F 192341%0%
Sep 1471°F47°F91°F 192725°F 192341%0%
Sep 1570°F47°F94°F 193927°F 200741%0%
Sep 1670°F46°F90°F 194827°F 200742%0%
Sep 1769°F46°F87°F 194828°F 195942%0%
Sep 1869°F46°F89°F 195527°F 191642%
Sep 1969°F45°F88°F 190830°F 192942%
Sep 2068°F45°F89°F 190822°F 197343%
Sep 2168°F44°F90°F 190821°F 197443%
Sep 2267°F44°F94°F 193718°F 197443%
Sep 2367°F43°F93°F 193726°F 199543%
Sep 2466°F43°F88°F 193520°F 197643%
Sep 2566°F43°F88°F 201724°F 194743%
Sep 2665°F42°F88°F 190824°F 194143%
Sep 2765°F42°F83°F 192325°F 199143%
Sep 2865°F41°F85°F 192323°F 194243%
Sep 2964°F41°F84°F 192221°F 194943%
Sep 3064°F41°F84°F 190525°F 192443%

Chance of rain

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

September 1
sunrise 6:21 AM, sunset 7:36 PM
September 30
sunrise 6:56 AM, sunset 6:41 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00475364 (Merrill), public domain. Records: NOAA GHCN-Daily, station USC00475364, 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.