S
M
T
W
T
F
S
1
43°
28°
2
36°
21°
3
36°
32°
4
45°
36°
5
46°
41°
6
41°
37°
7
52°
36°
8
68°
43°
9
72°
36°
10
81°
39°
11
77°
52°
12
61°
34°
13
46°
28°
14
50°
30°
15
46°
34°
16
67°
40°
17
40°
27°
18
37°
23°
19
48°
32°
20
64°
34°
21
54°
45°
22
72°
43°
23
55°
34°
24
48°
32°
25
55°
32°
26
75°
45°
27
59°
34°
28
45°
28°
29
57°
27°
30
72°
41°
31
81°
61°
1
79°
52°
2
52°
41°
3
63°
41°
4
79°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Allentown
Allentown's March 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for March is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how March weather will actually feel in Allentown. See also: April | May | June.
