S
M
T
W
T
F
S
29
78°
51°
30
71°
53°
31
60°
53°
1
54°
48°
2
59°
41°
3
72°
41°
4
76°
46°
5
80°
48°
6
75°
50°
7
74°
48°
8
74°
53°
9
68°
48°
10
60°
47°
11
52°
43°
12
53°
39°
13
62°
41°
14
68°
42°
15
69°
45°
16
71°
44°
17
69°
43°
18
65°
43°
19
69°
44°
20
71°
45°
21
68°
42°
22
69°
43°
23
64°
40°
24
64°
40°
25
63°
42°
26
63°
39°
27
64°
39°
28
64°
40°
29
65°
39°
30
64°
40°
1
66°
42°
2
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Upper Lake
Upper Lake's April 2026 forecast shows daily high temperatures ranging from 52° to 71°, with overnight lows between 39° and 48°. The average high for April is 65° with an average low of 42°. 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 Upper Lake. See also: May | June | July.
