Lowell, MA vs Seattle, WA

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

Lowell is cooler than Seattle (49°F vs 53.8°F annual avg) and wetter than it (48.5 in vs 36.5 in per year). Lowell has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Lowell, MA

Annual avg
49°F
Annual precip
48.5 in
Warmest month
July (84.7°F)
Coldest month
January (15.8°F)
Annual swing
47.9°F
Pleasant months
2 / 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

Lowell

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 Lowell Seattle
High Low Precip High Low Precip
January 34.0°F 15.8°F 3.61 in 48.6°F 36.8°F 5.21 in
February 37.3°F 16.9°F 3.20 in 50.7°F 36.8°F 3.71 in
March 45.4°F 24.4°F 4.32 in 54.8°F 39.4°F 3.94 in
April 59.0°F 34.6°F 4.06 in 59.8°F 43.6°F 2.89 in
May 70.0°F 45.0°F 3.81 in 66.5°F 49.3°F 1.98 in
June 79.0°F 55.0°F 4.37 in 71.2°F 54.0°F 1.22 in
July 84.7°F 60.9°F 3.86 in 77.3°F 57.5°F 0.56 in
August 83.0°F 59.3°F 4.00 in 77.4°F 58.1°F 0.83 in
September 75.5°F 51.5°F 3.89 in 71.7°F 53.9°F 1.37 in
October 62.4°F 39.5°F 5.00 in 61.0°F 46.4°F 3.49 in
November 50.5°F 30.3°F 3.85 in 53.0°F 39.9°F 5.80 in
December 39.8°F 22.1°F 4.54 in 47.8°F 36.2°F 5.49 in
Lowell overview
Full climate profile
 Seattle overview
Full climate profile