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Mount Olive, IL

55°F
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Mount Olive

Illinois

55°
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Mount Olive, 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

May

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
77°
50°
27
66°
57°
28
62°
53°
29
62°
44°
30
62°
39°
1
58°
41°
2
Mostly cloudy, a shower; cool
56°
39°
3
Windy; an afternoon shower
69°
52°
4
A t-storm around in the p.m.
76°
58°
5
Rain and a t-storm; cooler
60°
43°
6
Rain and drizzle possible
52°
39°
7
Breezy with a shower or two
60°
43°
8
Considerable cloudiness
67°
50°
9
Times of clouds and sun
72°
51°
10
Mostly cloudy, afternoon rain
67°
50°
11
Clouds yielding to sun
68°
50°
12
Partly sunny
69°
51°
13
Clouds and sun
70°
54°
14
Periods of rain
73°
51°
15
Occasional afternoon rain
83°
58°
16
Cloudy and humid
79°
59°
17
A shower and t-storm; humid
76°
58°
18
A couple of showers
75°
59°
19
A thundershower in spots
79°
58°
20
Sunny and less humid
74°
53°
21
A shower in the morning
77°
52°
22
Sunny
71°
51°
23
Sunshine and a few clouds
71°
51°
24
Times of sun and clouds
72°
52°
25
Rain
71°
52°
26
Mostly sunny
71°
53°
27
Partly sunny
73°
53°
28
Considerable cloudiness
74°
57°
29
Times of clouds and sun
75°
57°
30
Cloudy
78°
62°
31
Afternoon rain
75°
60°
1
Mostly sunny and less humid
76°
55°
2
Mostly sunny
77°
56°
3
Increasing clouds
78°
60°
4
Decreasing clouds
79°
64°
5
A shower and thunderstorm
81°
65°
6
Cloudy and humid
79°
65°

Temperature Graph

°F
90° 78° 66° 54° 42° May
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 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

May Weather in Mount Olive

Mount Olive's May 2026 forecast shows daily high temperatures ranging from 52° to 83°, with overnight lows between 39° and 65°. The average high for May is 72° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Mount Olive. See also: June | July | August.

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Weather Near Mount Olive:

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  • St. Charles, MO
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