S
M
T
W
T
F
S
29
54°
21°
30
68°
41°
31
77°
59°
1
68°
45°
2
45°
37°
3
64°
37°
4
75°
45°
5
54°
39°
6
50°
34°
7
41°
28°
8
50°
23°
9
60°
37°
10
74°
45°
11
62°
33°
12
68°
48°
13
79°
55°
14
80°
57°
15
79°
57°
16
72°
49°
17
70°
44°
18
66°
42°
19
63°
45°
20
67°
46°
21
66°
44°
22
64°
37°
23
56°
35°
24
57°
43°
25
57°
44°
26
56°
39°
27
57°
37°
28
58°
38°
29
58°
37°
30
59°
37°
1
59°
46°
2
69°
46°
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 80°, with overnight lows between 33° and 57°. The average high for April is 65° with an average low of 43°. 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.