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Herrin, IL

90°F
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Herrin

Illinois

90°
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Herrin, IL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities
Extreme Heat Warning

September

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
30
91°
66°
31
94°
71°
1
97°
73°
2
99°
79°
3
100°
75°
4
Mostly sunny and very hot
99°
73°
5
Very hot with a stray t-storm
99°
71°
6
Partly sunny; hot and humid
92°
63°
7
Mostly sunny; hot, less humid
90°
63°
8
Hot with sunshine
94°
72°
9
Mostly sunny and hot
96°
73°
10
A t-storm around in the p.m.
94°
67°
11
Warm with decreasing clouds
88°
64°
12
A t-storm around in the a.m.
90°
66°
13
Sunshine and hot
93°
68°
14
Humid with plenty of sun
85°
62°
15
Sunny and warm
86°
62°
16
Sunshine and warm
87°
61°
17
Sunny spells
83°
60°
18
Turning cloudy
80°
60°
19
A shower and thunderstorm
76°
61°
20
Mostly cloudy and humid
79°
60°
21
A shower and thunderstorm
82°
60°
22
Warm with plenty of sunshine
82°
59°
23
Sunny, warm and less humid
81°
57°
24
More sunshine than clouds
80°
58°
25
Humid with afternoon t-storms
79°
59°
26
Cloudy with rain tapering off
78°
54°
27
Sunny and less humid
71°
49°
28
Plenty of sunshine
70°
46°
29
Sunshine
68°
46°
30
Plenty of sunshine
71°
48°
1
Plenty of sunshine
70°
50°
2
Cloudy, a shower and t-storm
72°
54°
3
A passing morning shower
68°
53°

Temperature Graph

°F
100° 88° 76° 64° 52° Sep
Today 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

September Weather in Herrin

Herrin's September 2026 forecast shows daily high temperatures ranging from 68° to 99°, with overnight lows between 46° and 73°. The average high for September is 83° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Herrin. See also: October | November | December.

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World North America United States Illinois Herrin

Weather Near Herrin:

  • Cape Girardeau, MO
  • Carbondale, IL
  • Paducah, KY
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