S
M
T
W
T
F
S
29
83°
67°
30
85°
66°
31
88°
67°
1
87°
66°
2
89°
67°
3
88°
70°
4
88°
71°
5
86°
70°
6
89°
68°
7
75°
62°
8
80°
64°
9
82°
66°
10
84°
63°
11
85°
63°
12
86°
64°
13
86°
64°
14
87°
65°
15
82°
67°
16
82°
64°
17
85°
66°
18
87°
69°
19
83°
69°
20
83°
65°
21
83°
61°
22
81°
59°
23
84°
61°
24
86°
64°
25
86°
65°
26
87°
64°
27
88°
69°
28
88°
68°
29
89°
67°
30
88°
70°
1
88°
68°
2
86°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Stillwater
Stillwater's April 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 59° and 70°. The average high for April is 86° with an average low of 66°. 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 Stillwater. See also: May | June | July.