Allentown, PA vs Seattle, WA

Side-by-side comparison of monthly climate normals (NOAA 1991-2020).

Allentown is about the same temperature as Seattle (53.1°F vs 53.8°F annual avg) and wetter than it (47.4 in vs 36.5 in per year). Allentown has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Allentown, PA

Annual avg
53.1°F
Annual precip
47.4 in
Warmest month
July (86.4°F)
Coldest month
January (21.8°F)
Annual swing
45.5°F
Pleasant months
2 / 12
Hot-summer humid continental Dfa USDA Zone 7b

Seattle, WA

Annual avg
53.8°F
Annual precip
36.5 in
Warmest month
August (77.4°F)
Coldest month
December (36.2°F)
Annual swing
25.8°F
Pleasant months
4 / 12
Warm-summer Mediterranean Csb USDA Zone 9a

Best months to visit each city

Allentown

J
F
M
A
M
J
J
A
S
O
N
D

Seattle

J
F
M
A
M
J
J
A
S
O
N
D

Month-by-month comparison

Month Allentown Seattle
High Low Precip High Low Precip
January 38.4°F 21.8°F 3.30 in 48.6°F 36.8°F 5.21 in
February 41.6°F 23.2°F 2.77 in 50.7°F 36.8°F 3.71 in
March 50.8°F 30.5°F 3.63 in 54.8°F 39.4°F 3.94 in
April 63.4°F 40.3°F 3.67 in 59.8°F 43.6°F 2.89 in
May 73.5°F 50.6°F 3.65 in 66.5°F 49.3°F 1.98 in
June 81.9°F 59.9°F 4.40 in 71.2°F 54.0°F 1.22 in
July 86.4°F 64.7°F 5.30 in 77.3°F 57.5°F 0.56 in
August 84.3°F 62.8°F 4.56 in 77.4°F 58.1°F 0.83 in
September 77.4°F 55.2°F 4.84 in 71.7°F 53.9°F 1.37 in
October 65.5°F 43.8°F 4.14 in 61.0°F 46.4°F 3.49 in
November 53.8°F 34.1°F 3.24 in 53.0°F 39.9°F 5.80 in
December 43.1°F 26.8°F 3.86 in 47.8°F 36.2°F 5.49 in
Allentown overview
Full climate profile
 Seattle overview
Full climate profile