Harrisburg climate

Harrisburg Weather in September

NOAA 1991-2020 normals for Poinsett SP, 4.4 km from Harrisburg

Average highs run from 87°F on September 1 to 78°F on September 30, and lows from 67°F to 56°F. Normal precipitation for the month is 3.23 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 Harrisburg, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
83°F
Average low
62°F
Precipitation
3.23 in
Record high
103°FSep 5, 2026
Record low
39°FSep 26, 2001
Chance of a freeze
0%
Days of 90°F or more
6.1
Daylight
12 h 55 min to 11 h 51 min
Cloud cover
43%
Humidity
65%
Dew point
60°F
Wind
7.6 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 187°F67°F101°F 202659°F 20090%
Sep 286°F67°F101°F 202660°F 20090%
Sep 386°F66°F102°F 202661°F 20060%
Sep 486°F66°F101°F 202656°F 20100%
Sep 586°F66°F103°F 202651°F 20100%
Sep 685°F65°F103°F 202653°F 20100%
Sep 785°F65°F95°F 199950°F 20170%
Sep 885°F65°F100°F 201352°F 20170%
Sep 985°F65°F100°F 202653°F 20110%
Sep 1085°F64°F101°F 201353°F 19990%
Sep 1184°F64°F96°F 201356°F 20010%
Sep 1284°F64°F98°F 202652°F 20150%
Sep 1384°F63°F100°F 202647°F 20150%
Sep 1483°F63°F99°F 202550°F 19990%
Sep 1583°F62°F102°F 202650°F 20130%
Sep 1683°F62°F101°F 202650°F 20030%
Sep 1783°F62°F101°F 202647°F 20000%
Sep 1882°F61°F99°F 201949°F 20000%
Sep 1982°F61°F98°F 201948°F 20120%
Sep 2082°F61°F99°F 202248°F 20060%
Sep 2181°F60°F99°F 202249°F 20040%
Sep 2281°F60°F95°F 200547°F 19990%
Sep 2381°F59°F94°F 200742°F 19990%
Sep 2480°F59°F95°F 201649°F 20210%
Sep 2580°F59°F95°F 201643°F 20010%
Sep 2680°F58°F94°F 202339°F 20010%
Sep 2779°F58°F96°F 202343°F 20010%
Sep 2879°F57°F94°F 199947°F 20010%
Sep 2979°F57°F95°F 201941°F 20030%
Sep 3078°F56°F96°F 201943°F 19990%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Harrisburg, 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 7:30 PM
September 30
sunrise 6:57 AM, sunset 6:48 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00035831 (Poinsett SP), public domain. Records: NOAA GHCN-Daily, station USW00003953, 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.