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Centralia, IL

72°F
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Centralia, 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

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
Mostly sunny and hot
92°
68°
31
A morning thunderstorm or two
91°
68°
1
Partly sunny and less humid
87°
61°
2
Mostly sunny; low humidity
85°
61°
3
A sun-and-cloud mix
87°
60°
4
Plenty of sun
85°
61°
5
Plenty of sunshine
86°
62°
6
Plenty of sunshine
78°
57°
7
Plenty of sunshine
82°
61°
8
Plenty of sunshine
84°
63°
9
Warm with plenty of sunshine
86°
63°
10
Warm with plenty of sunshine
86°
62°
11
Increasing clouds and warm
85°
63°
12
A shower and thunderstorm
85°
62°
13
Less humid with plenty of sun
79°
58°
14
Mostly sunny
78°
60°
15
Mostly sunny
84°
61°
16
Sunny and warm
85°
62°
17
Mostly sunny and warm
85°
61°
18
Partly sunny and less humid
84°
58°
19
Mostly sunny
76°
55°
20
Mist in the afternoon
78°
59°
21
Sunny
80°
58°
22
Plenty of sunshine
82°
59°
23
Warm with plenty of sun
82°
55°
24
Mostly sunny and not as warm
72°
50°
25
Cloudy most of the time
72°
55°
26
Cloudy
73°
52°
27
Mostly sunny
73°
51°
28
Increasing cloudiness
75°
54°
29
A shower and thunderstorm
79°
56°
30
Mostly cloudy
75°
56°
1
Partly sunny and warm
80°
50°
2
Mostly sunny and not as warm
69°
47°
3
A sun-and-cloud mix
75°
56°

Temperature Graph

°F
90° 80° 70° 60° 50° Sep
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 Centralia

Centralia's September 2026 forecast shows daily high temperatures ranging from 69° to 92°, with overnight lows between 47° and 68°. The average high for September is 81° with an average low of 58°. 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 Centralia. See also: October | November | December.

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