Mount Vernon, WA vs Phoenix, AZ

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

Mount Vernon is cooler than Phoenix (51.4°F vs 72.5°F annual avg) and drier than it (0 in vs 8.9 in per year). Mount Vernon has a Desert (cold) climate; Phoenix a Desert (hot) climate.

Mount Vernon, WA

Annual avg
51.4°F
Annual precip
0 in
Warmest month
August (75.1°F)
Coldest month
February (34.9°F)
Annual swing
23.5°F
Pleasant months
3 / 12
Desert (cold) BWk USDA Zone 8b

Phoenix, AZ

Annual avg
72.5°F
Annual precip
8.9 in
Warmest month
July (104.0°F)
Coldest month
December (42.7°F)
Annual swing
39.1°F
Pleasant months
2 / 12
Desert (hot) BWh USDA Zone 9b

Best months to visit each city

Mount Vernon

J
F
M
A
M
J
J
A
S
O
N
D

Phoenix

J
F
M
A
M
J
J
A
S
O
N
D

Month-by-month comparison

Month Mount Vernon Phoenix
High Low Precip High Low Precip
January 47.1°F 35.0°F — in 65.4°F 44.1°F 1.17 in
February 49.6°F 34.9°F — in 68.1°F 46.1°F 1.21 in
March 53.7°F 38.0°F — in 75.0°F 50.9°F 1.09 in
April 58.4°F 41.3°F — in 82.5°F 56.6°F 0.35 in
May 64.8°F 46.6°F — in 91.5°F 64.7°F 0.19 in
June 68.7°F 50.7°F — in 101.5°F 72.7°F 0.03 in
July 73.3°F 53.5°F — in 104.0°F 80.8°F 0.81 in
August 75.1°F 53.2°F — in 102.5°F 80.5°F 0.96 in
September 68.8°F 48.6°F — in 97.5°F 74.7°F 0.71 in
October 59.3°F 43.2°F — in 86.3°F 62.7°F 0.67 in
November 51.2°F 38.8°F — in 74.0°F 50.8°F 0.90 in
December 45.9°F 35.3°F — in 63.9°F 42.7°F 0.81 in
Mount Vernon overview
Full climate profile
 Phoenix overview
Full climate profile