Port Jefferson, OH vs Seattle, WA

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

Port Jefferson is cooler than Seattle (50.9°F vs 53.8°F annual avg) and wetter than it (41.7 in vs 36.5 in per year). Port Jefferson has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Port Jefferson, OH

Annual avg
50.9°F
Annual precip
41.7 in
Warmest month
July (84.3°F)
Coldest month
January (17.9°F)
Annual swing
47°F
Pleasant months
1 / 12
Hot-summer humid continental Dfa USDA Zone 7a

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

Port Jefferson

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 Port Jefferson Seattle
High Low Precip High Low Precip
January 34.4°F 17.9°F 2.89 in 48.6°F 36.8°F 5.21 in
February 38.5°F 20.1°F 2.31 in 50.7°F 36.8°F 3.71 in
March 48.9°F 28.0°F 3.17 in 54.8°F 39.4°F 3.94 in
April 62.3°F 37.8°F 4.08 in 59.8°F 43.6°F 2.89 in
May 72.8°F 49.1°F 4.08 in 66.5°F 49.3°F 1.98 in
June 81.2°F 58.9°F 4.70 in 71.2°F 54.0°F 1.22 in
July 84.3°F 62.1°F 4.57 in 77.3°F 57.5°F 0.56 in
August 83.0°F 59.8°F 3.76 in 77.4°F 58.1°F 0.83 in
September 77.9°F 52.5°F 3.11 in 71.7°F 53.9°F 1.37 in
October 65.2°F 41.5°F 2.89 in 61.0°F 46.4°F 3.49 in
November 51.1°F 31.5°F 3.17 in 53.0°F 39.9°F 5.80 in
December 39.6°F 23.9°F 2.92 in 47.8°F 36.2°F 5.49 in
Port Jefferson overview
Full climate profile
 Seattle overview
Full climate profile