Tiffin climate

Tiffin Weather in September

NOAA 1991-2020 normals for Iowa City Muni AP, 12.9 km from Tiffin

Average highs run from 82°F on September 1 to 72°F on September 30, and lows from 60°F to 48°F. Normal precipitation for the month is 3.24 in over about 10 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 Tiffin, 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
54°F
Precipitation
3.24 in
Record high
101°FSep 9, 2013
Record low
26°FSep 23, 1995
Chance of a freeze
4%
Days of 90°F or more
2.4
Daylight
13 h 07 min to 11 h 47 min
Cloud cover
47%
Humidity
70%
Dew point
54°F
Wind
9.2 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 182°F60°F98°F 201136°F 194933%0%
Sep 281°F59°F98°F 200040°F 194933%0%
Sep 381°F59°F96°F 202341°F 195233%0%
Sep 481°F59°F97°F 202341°F 195233%0%
Sep 581°F58°F94°F 202641°F 195033%0%
Sep 681°F58°F93°F 201539°F 195033%0%
Sep 780°F58°F96°F 201340°F 202533%0%
Sep 880°F57°F90°F 200239°F 194933%0%
Sep 980°F57°F101°F 201340°F 199533%0%
Sep 1080°F56°F99°F 201339°F 199533%0%
Sep 1179°F56°F97°F 200042°F 199533%0%
Sep 1279°F56°F94°F 195241°F 201433%0%
Sep 1379°F55°F96°F 202537°F 201433%0%
Sep 1478°F55°F96°F 202538°F 199633%0%
Sep 1578°F55°F93°F 201735°F 200733%0%
Sep 1678°F54°F93°F 202538°F 195133%0%
Sep 1777°F54°F92°F 194838°F 199933%0%
Sep 1877°F53°F93°F 194841°F 199933%0%
Sep 1977°F53°F96°F 194838°F 195233%0%
Sep 2076°F53°F97°F 202237°F 200633%0%
Sep 2176°F52°F92°F 200536°F 195233%0%
Sep 2276°F52°F94°F 201730°F 199533%0%
Sep 2375°F51°F95°F 201726°F 199533%0%
Sep 2475°F51°F93°F 201731°F 199533%0%
Sep 2574°F51°F93°F 201735°F 195033%0%
Sep 2674°F50°F90°F 202135°F 195032%0%
Sep 2773°F50°F89°F 202138°F 200032%0%
Sep 2873°F49°F94°F 195232°F 195132%0%
Sep 2973°F49°F90°F 200228°F 194932%0%
Sep 3072°F48°F93°F 202328°F 194932%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Tiffin, 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 6:33 AM, sunset 7:40 PM
September 30
sunrise 7:03 AM, sunset 6:50 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014937 (Iowa City Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00014937, 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.