Hermiston, OR vs Seattle, WA

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

Hermiston is about the same temperature as Seattle (53.9°F vs 53.8°F annual avg) and drier than it (8.6 in vs 36.5 in per year). Hermiston has a Desert (cold) climate; Seattle a Warm-summer Mediterranean climate.

Hermiston, OR

Annual avg
53.9°F
Annual precip
8.6 in
Warmest month
July (92.7°F)
Coldest month
December (28.2°F)
Annual swing
40.4°F
Desert (cold) BWk USDA Zone 8a

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

Hermiston

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 Hermiston Seattle
High Low Precip High Low Precip
January 43.3°F 28.7°F 1.14 in 48.6°F 36.8°F 5.21 in
February 49.4°F 29.2°F 0.86 in 50.7°F 36.8°F 3.71 in
March 59.1°F 33.7°F 0.77 in 54.8°F 39.4°F 3.94 in
April 66.6°F 38.9°F 0.78 in 59.8°F 43.6°F 2.89 in
May 76.2°F 46.3°F 0.83 in 66.5°F 49.3°F 1.98 in
June 82.2°F 53.0°F 0.64 in 71.2°F 54.0°F 1.22 in
July 92.7°F 58.6°F 0.12 in 77.3°F 57.5°F 0.56 in
August 91.0°F 56.8°F 0.17 in 77.4°F 58.1°F 0.83 in
September 81.2°F 47.9°F 0.33 in 71.7°F 53.9°F 1.37 in
October 66.5°F 39.0°F 0.80 in 61.0°F 46.4°F 3.49 in
November 50.7°F 32.3°F 1.05 in 53.0°F 39.9°F 5.80 in
December 42.1°F 28.2°F 1.12 in 47.8°F 36.2°F 5.49 in
Hermiston overview
Full climate profile
 Seattle overview
Full climate profile