S
M
T
W
T
F
S
29
77°
38°
30
73°
44°
31
60°
46°
1
67°
36°
2
55°
33°
3
62°
20°
4
71°
24°
5
77°
29°
6
78°
40°
7
77°
40°
8
77°
41°
9
74°
47°
10
68°
42°
11
66°
41°
12
56°
35°
13
58°
33°
14
64°
38°
15
69°
41°
16
70°
40°
17
71°
44°
18
67°
40°
19
64°
38°
20
67°
38°
21
68°
39°
22
67°
35°
23
61°
32°
24
61°
33°
25
62°
33°
26
60°
34°
27
60°
33°
28
61°
32°
29
61°
34°
30
62°
33°
1
62°
34°
2
64°
41°
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 56° to 74°, with overnight lows between 32° and 47°. The average high for April is 64° with an average low of 37°. 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.