Allentown Weather Year-Round — Best Time to Visit
Allentown, United States has mild weather year-round. The best time to visit is August (score: 84/100). Annual average high: 16.4°C, total rainfall: 1136mm.
When is the best time to visit Allentown?
84
August is the best month to visit Allentown with a travel score of 84/100 (Excellent).
Expect highs of 28.2°C, 10 rain days, and 10.5 hours of daily sunshine.
View August weather details →Travel Score by Month
48
Jan
52
Feb
58
Mar
68
Apr
77
May
82
Jun
84
Jul
84
Aug
83
Sep
71
Oct
61
Nov
50
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Allentown each month?
16.4°C
Avg High
6.6°C
Avg Low
1136mm
Annual Rain
How much rain does Allentown get?
Allentown receives 1136mm of rain annually. The wettest month is typically September with 110mm, while November is the driest.
What is the weather like each month in Allentown?
January
48
3°C
Low: -5°C
9 rain days
Mixed
February
52
5°C
Low: -5°C
9 rain days
Mixed
March
58
10°C
Low: -1°C
10 rain days
Mixed
April
68
16°C
Low: 5°C
10 rain days
Good
May
77
21°C
Low: 10°C
11 rain days
Good
June
82
26°C
Low: 16°C
11 rain days
Excellent
July
84
29°C
Low: 19°C
11 rain days
Excellent
August
Best time to visit84
28°C
Low: 18°C
10 rain days
Excellent
September
83
24°C
Low: 14°C
9 rain days
Excellent
October
71
18°C
Low: 8°C
8 rain days
Good
November
61
11°C
Low: 2°C
8 rain days
Good
December
50
6°C
Low: -2°C
9 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31