Royalton climate

Royalton Weather in September

NOAA 1991-2020 normals for Du Quoin 4 Se, 14.1 km from Royalton

Average highs run from 84°F on September 1 to 75°F on September 30, and lows from 62°F to 52°F. Normal precipitation for the month is 3.40 in over about 6 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 Royalton, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
80°F
Average low
57°F
Precipitation
3.40 in
Record high
103°FSep 5, 2026
Record low
33°FSep 30, 2022
Chance of a freeze
2%
Days of 90°F or more
4.2
Daylight
12 h 59 min to 11 h 50 min
Cloud cover
46%
Humidity
68%
Dew point
57°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 184°F62°F98°F 202650°F 200722%0%
Sep 284°F61°F99°F 202649°F 200921%0%
Sep 384°F61°F100°F 202653°F 202421%0%
Sep 484°F61°F100°F 202650°F 201021%0%
Sep 583°F60°F103°F 202647°F 201021%0%
Sep 683°F60°F96°F 199844°F 201721%0%
Sep 783°F60°F94°F 199842°F 201721%0%
Sep 882°F59°F95°F 200240°F 202521%0%
Sep 982°F59°F96°F 200241°F 202421%0%
Sep 1082°F59°F96°F 200244°F 199821%0%
Sep 1182°F58°F95°F 201344°F 201721%0%
Sep 1281°F58°F93°F 201946°F 202221%0%
Sep 1381°F58°F95°F 201144°F 201421%0%
Sep 1481°F57°F98°F 202540°F 199921%0%
Sep 1580°F57°F97°F 202644°F 199920%0%
Sep 1680°F57°F97°F 202640°F 200020%0%
Sep 1780°F56°F98°F 202641°F 199920%0%
Sep 1879°F56°F95°F 202541°F 199921%0%
Sep 1979°F55°F95°F 202242°F 201221%0%
Sep 2079°F55°F98°F 202240°F 200621%0%
Sep 2178°F55°F99°F 202244°F 200021%0%
Sep 2278°F54°F92°F 200538°F 199921%0%
Sep 2378°F54°F94°F 200737°F 201221%0%
Sep 2477°F54°F92°F 201736°F 201221%0%
Sep 2577°F53°F90°F 199838°F 200121%0%
Sep 2677°F53°F89°F 199836°F 200121%0%
Sep 2776°F53°F93°F 199839°F 200020%0%
Sep 2876°F52°F92°F 199937°F 202220%0%
Sep 2976°F52°F93°F 201935°F 202220%0%
Sep 3075°F52°F94°F 201933°F 202220%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Royalton, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:27 AM, sunset 7:26 PM
September 30
sunrise 6:51 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 USC00112483 (Du Quoin 4 Se), public domain. Records: NOAA GHCN-Daily, station USW00093810, 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.