Napa, CA vs Seattle, WA

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

Napa is warmer than Seattle (60.3°F vs 53.8°F annual avg) and drier than it (26.7 in vs 36.5 in per year). Both cities share a Warm-summer Mediterranean climate (Csb).

Napa, CA

Annual avg
60.3°F
Annual precip
26.7 in
Warmest month
September (84.4°F)
Coldest month
December (39.7°F)
Annual swing
20.5°F
Warm-summer Mediterranean Csb USDA Zone 9a

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

Napa

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 Napa Seattle
High Low Precip High Low Precip
January 58.6°F 40.1°F 4.98 in 48.6°F 36.8°F 5.21 in
February 63.2°F 41.9°F 5.13 in 50.7°F 36.8°F 3.71 in
March 67.5°F 43.6°F 3.67 in 54.8°F 39.4°F 3.94 in
April 72.1°F 45.6°F 1.72 in 59.8°F 43.6°F 2.89 in
May 76.6°F 49.9°F 1.08 in 66.5°F 49.3°F 1.98 in
June 82.3°F 53.7°F 0.29 in 71.2°F 54.0°F 1.22 in
July 83.3°F 55.5°F 0.00 in 77.3°F 57.5°F 0.56 in
August 83.7°F 55.5°F 0.06 in 77.4°F 58.1°F 0.83 in
September 84.4°F 53.4°F 0.09 in 71.7°F 53.9°F 1.37 in
October 78.1°F 49.3°F 1.34 in 61.0°F 46.4°F 3.49 in
November 66.2°F 43.6°F 2.77 in 53.0°F 39.9°F 5.80 in
December 58.5°F 39.7°F 5.53 in 47.8°F 36.2°F 5.49 in
Napa overview
Full climate profile
 Seattle overview
Full climate profile