Plainfield climate

Plainfield Weather in September

NOAA 1991-2020 normals for Indianapolis, 10.2 km from Plainfield

Average highs run from 83°F on September 1 to 73°F on September 30, and lows from 63°F to 52°F. Normal precipitation for the month is 3.14 in over about 8 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 Plainfield, 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
57°F
Precipitation
3.14 in
Record high
100°FSep 3, 2011
Record low
39°FSep 23, 2012
Chance of a freeze
1%
Days of 90°F or more
2.8
Daylight
13 h 03 min to 11 h 48 min
Cloud cover
48%
Humidity
70%
Dew point
55°F
Wind
6.9 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°F63°F99°F 201155°F 202526%0%
Sep 282°F62°F99°F 201154°F 201726%0%
Sep 382°F62°F100°F 201156°F 201326%0%
Sep 482°F62°F96°F 202654°F 202526%0%
Sep 582°F61°F95°F 201852°F 202026%0%
Sep 682°F61°F94°F 201549°F 201726%0%
Sep 781°F61°F94°F 201547°F 201726%0%
Sep 881°F60°F92°F 201544°F 202426%0%
Sep 981°F60°F94°F 201345°F 202426%0%
Sep 1080°F60°F99°F 201349°F 201726%0%
Sep 1180°F59°F99°F 201350°F 201726%0%
Sep 1280°F59°F92°F 201951°F 201526%0%
Sep 1379°F59°F92°F 201147°F 201426%0%
Sep 1479°F58°F88°F 202445°F 201426%0%
Sep 1579°F58°F92°F 202646°F 201126%0%
Sep 1678°F57°F92°F 202645°F 201126%0%
Sep 1778°F57°F91°F 201745°F 201426%0%
Sep 1878°F57°F90°F 201847°F 201226%0%
Sep 1977°F56°F89°F 201841°F 201226%0%
Sep 2077°F56°F92°F 201846°F 202027%0%
Sep 2176°F55°F92°F 201749°F 201227%0%
Sep 2276°F55°F93°F 201743°F 201227%0%
Sep 2376°F55°F91°F 201739°F 201227%0%
Sep 2475°F54°F92°F 201739°F 201227%0%
Sep 2575°F54°F91°F 201752°F 201227%0%
Sep 2674°F53°F93°F 201750°F 202227%0%
Sep 2774°F53°F90°F 201943°F 202227%0%
Sep 2874°F52°F88°F 201943°F 202227%0%
Sep 2973°F52°F88°F 202543°F 202227%0%
Sep 3073°F52°F91°F 201944°F 202227%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Plainfield, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 7:14 AM, sunset 8:17 PM
September 30
sunrise 7:41 AM, sunset 7:29 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00093819 (Indianapolis), public domain. Records: NOAA GHCN-Daily, station USC00124260, 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.