Bertram, IA vs Seattle, WA

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

Bertram is cooler than Seattle (49.9°F vs 53.8°F annual avg) and similar rainfall to it (38.8 in vs 36.5 in per year). Bertram has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Bertram, IA

Annual avg
49.9°F
Annual precip
38.8 in
Warmest month
July (85.5°F)
Coldest month
January (12.5°F)
Annual swing
53.1°F
Pleasant months
1 / 12
Hot-summer humid continental Dfa USDA Zone 6b

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

Bertram

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 Bertram Seattle
High Low Precip High Low Precip
January 30.0°F 12.5°F 1.17 in 48.6°F 36.8°F 5.21 in
February 35.1°F 16.6°F 1.34 in 50.7°F 36.8°F 3.71 in
March 48.9°F 27.5°F 2.06 in 54.8°F 39.4°F 3.94 in
April 63.3°F 38.4°F 4.02 in 59.8°F 43.6°F 2.89 in
May 73.8°F 49.6°F 4.74 in 66.5°F 49.3°F 1.98 in
June 82.3°F 59.6°F 5.68 in 71.2°F 54.0°F 1.22 in
July 85.5°F 63.3°F 4.47 in 77.3°F 57.5°F 0.56 in
August 83.4°F 61.2°F 4.42 in 77.4°F 58.1°F 0.83 in
September 77.3°F 53.0°F 3.96 in 71.7°F 53.9°F 1.37 in
October 64.1°F 41.5°F 3.00 in 61.0°F 46.4°F 3.49 in
November 48.1°F 29.3°F 2.22 in 53.0°F 39.9°F 5.80 in
December 34.7°F 18.6°F 1.67 in 47.8°F 36.2°F 5.49 in
Bertram overview
Full climate profile
 Seattle overview
Full climate profile