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Best time to visit Allentown

Monthly weather scores combine temperatures, sunshine, rain, and comfort signals to highlight when Allentownis at its most inviting, and when the weather is least cooperative.

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Best overall month

September

Overall score 45.0%

High
75.4°F
Low
57.7°F
Sun
5.7h
Rain
0.2in
Rain days
30.0%
Humidity
77.1%
Wind
8.6mph
Day length
12.4h
Sun percent
45.8%
Month to omit

January

Overall score 19.3%

High
36.3°F
Low
24.1°F
Sun
3.0h
Rain
0.2in
Rain days
32.0%
Humidity
74.2%
Wind
11.8mph
Day length
9.7h
Sun percent
31.1%

Overall travel weather

A simple average of the Heat Seeker, Mild Moderate, and Sun And Dry scores.

The tables below rank months by score. Each month includes the long-term weather inputs behind the score: daytime and nighttime temperature, sunshine, rain, rainy-day share, humidity, wind, day length, and the score components for this travel style.

Monthly score trend

This chart shows how the score changes through the year, so the top and omitted months below have context.

Top months to visit

Higher scores mean months that better match this travel style.

1. September

Score 45.0%

#1
High
75.4°F
Low
57.7°F
Sun
5.7h
Rain
0.2in
Rain days
30.0%
Humidity
77.1%
Wind
8.6mph
Day length
12.4h
Sun percent
45.8%
Heat score
41.0%
Mild score
47.0%
Dry score
47.0%

2. May

Score 42.3%

#2
High
67.8°F
Low
50.0°F
Sun
4.9h
Rain
0.2in
Rain days
42.0%
Humidity
77.6%
Wind
10.2mph
Day length
14.4h
Sun percent
33.9%
Heat score
21.0%
Mild score
68.0%
Dry score
38.0%

3. October

Score 40.0%

#3
High
64.2°F
Low
47.7°F
Sun
4.7h
Rain
0.2in
Rain days
29.0%
Humidity
75.7%
Wind
10.1mph
Day length
11.1h
Sun percent
42.3%
Heat score
27.0%
Mild score
53.0%
Dry score
40.0%

Top months to omit

Lower scores mean months where the weather is least aligned with this travel style.

1. January

Score 19.3%

#1
High
36.3°F
Low
24.1°F
Sun
3.0h
Rain
0.2in
Rain days
32.0%
Humidity
74.2%
Wind
11.8mph
Day length
9.7h
Sun percent
31.1%
Heat score
13.0%
Mild score
13.0%
Dry score
32.0%

2. February

Score 19.3%

#2
High
41.2°F
Low
26.4°F
Sun
3.4h
Rain
0.2in
Rain days
35.0%
Humidity
76.5%
Wind
11.1mph
Day length
10.7h
Sun percent
31.8%
Heat score
13.0%
Mild score
12.0%
Dry score
33.0%

3. December

Score 20.0%

#3
High
40.6°F
Low
28.6°F
Sun
3.0h
Rain
0.2in
Rain days
31.0%
Humidity
77.6%
Wind
11.0mph
Day length
9.3h
Sun percent
32.2%
Heat score
14.0%
Mild score
13.0%
Dry score
33.0%

Heat Seeker

Heat Seeker Score is a composite score designed for those who crave hot, sunny weather with minimal rainfall. It prioritizes high temperatures and abundant sunshine.

The tables below rank months by score. Each month includes the long-term weather inputs behind the score: daytime and nighttime temperature, sunshine, rain, rainy-day share, humidity, wind, day length, and the score components for this travel style.

Monthly score trend

This chart shows how the score changes through the year, so the top and omitted months below have context.

Top months to visit

Higher scores mean months that better match this travel style.

1. July

Score 54.0%

#1
High
84.6°F
Low
66.0°F
Sun
6.7h
Rain
0.2in
Rain days
44.0%
Humidity
77.1%
Wind
8.0mph
Day length
14.7h
Sun percent
45.5%
Heat high
61.0%
Heat low
100.0%
Heat sun
46.0%
Heat rain
12.0%

2. August

Score 48.0%

#2
High
81.5°F
Low
63.9°F
Sun
5.5h
Rain
0.2in
Rain days
39.0%
Humidity
76.5%
Wind
8.1mph
Day length
13.7h
Sun percent
40.0%
Heat high
50.0%
Heat low
100.0%
Heat sun
40.0%
Heat rain
22.0%

3. June

Score 42.0%

#3
High
77.9°F
Low
59.0°F
Sun
6.4h
Rain
0.2in
Rain days
41.0%
Humidity
76.4%
Wind
9.5mph
Day length
15.0h
Sun percent
42.6%
Heat high
37.0%
Heat low
100.0%
Heat sun
43.0%
Heat rain
18.0%

Top months to omit

Lower scores mean months where the weather is least aligned with this travel style.

1. January

Score 13.0%

#1
High
36.3°F
Low
24.1°F
Sun
3.0h
Rain
0.2in
Rain days
32.0%
Humidity
74.2%
Wind
11.8mph
Day length
9.7h
Sun percent
31.1%
Heat high
0.0%
Heat low
0.0%
Heat sun
31.0%
Heat rain
36.0%

2. February

Score 13.0%

#2
High
41.2°F
Low
26.4°F
Sun
3.4h
Rain
0.2in
Rain days
35.0%
Humidity
76.5%
Wind
11.1mph
Day length
10.7h
Sun percent
31.8%
Heat high
0.0%
Heat low
1.0%
Heat sun
32.0%
Heat rain
30.0%

3. December

Score 14.0%

#3
High
40.6°F
Low
28.6°F
Sun
3.0h
Rain
0.2in
Rain days
31.0%
Humidity
77.6%
Wind
11.0mph
Day length
9.3h
Sun percent
32.2%
Heat high
0.0%
Heat low
0.0%
Heat sun
32.0%
Heat rain
38.0%

Mild Moderate

Mild Moderate Score is designed for those who prefer comfortable, temperate weather conditions. It favors moderate temperatures and balanced weather patterns.

The tables below rank months by score. Each month includes the long-term weather inputs behind the score: daytime and nighttime temperature, sunshine, rain, rainy-day share, humidity, wind, day length, and the score components for this travel style.

Monthly score trend

This chart shows how the score changes through the year, so the top and omitted months below have context.

Top months to visit

Higher scores mean months that better match this travel style.

1. May

Score 68.0%

#1
High
67.8°F
Low
50.0°F
Sun
4.9h
Rain
0.2in
Rain days
42.0%
Humidity
77.6%
Wind
10.2mph
Day length
14.4h
Sun percent
33.9%
Mild high
98.0%
Mild low
60.0%
Mild sun
28.0%
Mild rain
40.0%

2. October

Score 53.0%

#2
High
64.2°F
Low
47.7°F
Sun
4.7h
Rain
0.2in
Rain days
29.0%
Humidity
75.7%
Wind
10.1mph
Day length
11.1h
Sun percent
42.3%
Mild high
65.0%
Mild low
34.0%
Mild sun
45.0%
Mild rain
69.0%

3. September

Score 47.0%

#3
High
75.4°F
Low
57.7°F
Sun
5.7h
Rain
0.2in
Rain days
30.0%
Humidity
77.1%
Wind
8.6mph
Day length
12.4h
Sun percent
45.8%
Mild high
32.0%
Mild low
54.0%
Mild sun
52.0%
Mild rain
67.0%

Top months to omit

Lower scores mean months where the weather is least aligned with this travel style.

1. February

Score 12.0%

#1
High
41.2°F
Low
26.4°F
Sun
3.4h
Rain
0.2in
Rain days
35.0%
Humidity
76.5%
Wind
11.1mph
Day length
10.7h
Sun percent
31.8%
Mild high
0.0%
Mild low
0.0%
Mild sun
24.0%
Mild rain
56.0%

2. January

Score 13.0%

#2
High
36.3°F
Low
24.1°F
Sun
3.0h
Rain
0.2in
Rain days
32.0%
Humidity
74.2%
Wind
11.8mph
Day length
9.7h
Sun percent
31.1%
Mild high
0.0%
Mild low
0.0%
Mild sun
22.0%
Mild rain
62.0%

3. March

Score 13.0%

#3
High
48.6°F
Low
31.5°F
Sun
4.1h
Rain
0.2in
Rain days
35.0%
Humidity
73.2%
Wind
12.6mph
Day length
12.0h
Sun percent
34.3%
Mild high
0.0%
Mild low
0.0%
Mild sun
29.0%
Mild rain
56.0%

Sun And Dry

Sun And Dry Score maximizes sun exposure and minimizes all forms of precipitation. Temperature is secondary, preferring mild-to-warm conditions.

The tables below rank months by score. Each month includes the long-term weather inputs behind the score: daytime and nighttime temperature, sunshine, rain, rainy-day share, humidity, wind, day length, and the score components for this travel style.

Monthly score trend

This chart shows how the score changes through the year, so the top and omitted months below have context.

Top months to visit

Higher scores mean months that better match this travel style.

1. July

Score 52.0%

#1
High
84.6°F
Low
66.0°F
Sun
6.7h
Rain
0.2in
Rain days
44.0%
Humidity
77.1%
Wind
8.0mph
Day length
14.7h
Sun percent
45.5%
Dry sun
46.0%
Dry days
0.0%
Dry rain
100.0%
Dry comfort
95.0%

2. August

Score 49.0%

#2
High
81.5°F
Low
63.9°F
Sun
5.5h
Rain
0.2in
Rain days
39.0%
Humidity
76.5%
Wind
8.1mph
Day length
13.7h
Sun percent
40.0%
Dry sun
40.0%
Dry days
0.0%
Dry rain
100.0%
Dry comfort
83.0%

3. June

Score 48.0%

#3
High
77.9°F
Low
59.0°F
Sun
6.4h
Rain
0.2in
Rain days
41.0%
Humidity
76.4%
Wind
9.5mph
Day length
15.0h
Sun percent
42.6%
Dry sun
43.0%
Dry days
0.0%
Dry rain
100.0%
Dry comfort
70.0%

Top months to omit

Lower scores mean months where the weather is least aligned with this travel style.

1. April

Score 31.0%

#1
High
59.0°F
Low
41.2°F
Sun
3.7h
Rain
0.2in
Rain days
36.0%
Humidity
73.1%
Wind
12.2mph
Day length
13.3h
Sun percent
27.8%
Dry sun
28.0%
Dry days
0.0%
Dry rain
100.0%
Dry comfort
0.0%

2. January

Score 32.0%

#2
High
36.3°F
Low
24.1°F
Sun
3.0h
Rain
0.2in
Rain days
32.0%
Humidity
74.2%
Wind
11.8mph
Day length
9.7h
Sun percent
31.1%
Dry sun
31.0%
Dry days
0.0%
Dry rain
100.0%
Dry comfort
0.0%

3. February

Score 33.0%

#3
High
41.2°F
Low
26.4°F
Sun
3.4h
Rain
0.2in
Rain days
35.0%
Humidity
76.5%
Wind
11.1mph
Day length
10.7h
Sun percent
31.8%
Dry sun
32.0%
Dry days
0.0%
Dry rain
100.0%
Dry comfort
0.0%
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