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Gillespie, IL

69°F
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Gillespie

Illinois

69°
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Gillespie, IL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Monthly

Air Quality Health & Activities
Wind Advisory

April

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
29
68°
41°
30
82°
52°
31
79°
60°
1
61°
45°
2
Showers and a heavier t-storm
71°
58°
3
Warm with a thunderstorm
78°
52°
4
A little morning rain
59°
37°
5
Mostly sunny and breezy
56°
39°
6
Mostly sunny
57°
33°
7
Mostly sunny and cool
50°
39°
8
Partly sunny and breezy
64°
48°
9
Showers around in the p.m.
64°
46°
10
Partly sunny
67°
52°
11
Mostly cloudy
68°
54°
12
Periods of rain
65°
48°
13
A little afternoon rain
63°
45°
14
Remaining cloudy
62°
44°
15
Mostly sunny
65°
43°
16
Clouds and sun
71°
43°
17
Cloudy and cooler
60°
46°
18
Plenty of sun
65°
48°
19
Plenty of sun
71°
50°
20
Increasing cloudiness
72°
51°
21
Cloudy
72°
53°
22
Cloudy
73°
53°
23
Mostly sunny
73°
52°
24
Partly sunny
74°
54°
25
Mostly cloudy, rain ending
73°
50°
26
Mostly sunny and cooler
63°
41°
27
Plenty of sun
59°
41°
28
Rain
61°
45°
29
Clouds and sun
62°
44°
30
Turning cloudy
63°
43°
1
Mostly cloudy
64°
48°
2
Mostly cloudy
65°
50°

Temperature Graph

°F
80° 70° 60° 50° 40° Apr
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

April Weather in Gillespie

Gillespie's April 2026 forecast shows daily high temperatures ranging from 50° to 78°, with overnight lows between 33° and 58°. The average high for April is 65° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Gillespie. See also: May | June | July.

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Weather Near Gillespie:

  • O'Fallon, MO
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