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Fairmount, IL

69°F
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Fairmount

Illinois

69°
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Fairmount, 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
Flood Watch

August

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
26
Mostly sunny
81°
60°
27
Partly sunny
81°
61°
28
Mostly sunny
82°
62°
29
Mostly sunny and humid
83°
64°
30
Humid; a p.m. t-storm or two
84°
67°
31
Partly sunny and humid
86°
67°
1
Decreasing clouds and humid
88°
66°
2
Partly sunny and humid
88°
67°
3
An afternoon t-storm or two
86°
67°
4
Couple of thunderstorms
87°
63°
5
Humid with a few showers
83°
59°
6
Mostly cloudy and less humid
81°
59°
7
Sunshine with low humidity
79°
60°
8
Mostly sunny
80°
60°
9
Partly sunny
80°
61°
10
Partly sunny
81°
61°
11
Humid with decreasing clouds
83°
62°
12
Humid with plenty of sun
86°
63°
13
Brilliant sunshine and humid
87°
65°
14
Mostly sunny and humid
88°
66°
15
Sunny and humid
88°
66°
16
Couple of thunderstorms
87°
65°
17
A shower and t-storm; humid
84°
60°
18
A shower and t-storm; humid
81°
58°
19
Mostly sunny
81°
60°
20
Mostly sunny
82°
64°
21
An afternoon t-storm or two
80°
65°
22
Humid with thunderstorms
81°
59°
23
Decreasing clouds and humid
81°
65°
24
Humid with abundant sunshine
85°
66°
25
A morning shower; humid
84°
65°
26
A couple of t-storms; humid
88°
64°
27
Humid; an afternoon shower
82°
66°
28
Humid; a morning t-shower
86°
66°
29
Mostly sunny and humid
87°
65°
30
Humid; a stray p.m. t-storm
86°
66°
31
Humid; a p.m. t-storm or two
84°
62°
1
A t-storm around in the p.m.
83°
63°
2
Partly sunny and humid
84°
62°
3
Partly sunny and humid
83°
60°
4
A shower and t-storm; humid
84°
63°
5
Humid with a stray t-storm
84°
62°

Temperature Graph

°F
90° 82° 74° 66° 58° Aug
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 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

August Weather in Fairmount

Fairmount's August 2026 forecast shows daily high temperatures ranging from 79° to 88°, with overnight lows between 58° and 67°. The average high for August is 84° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fairmount. See also: September | October | November.

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September 2026

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World North America United States Illinois Fairmount

Weather Near Fairmount:

  • Champaign, IL
  • Decatur, IL
  • Springfield, IL
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