St. Marys, PA vs Phoenix, AZ

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

St. Marys is cooler than Phoenix (45.1°F vs 72.5°F annual avg) and wetter than it (46.4 in vs 8.9 in per year). St. Marys has a Warm-summer humid continental climate; Phoenix a Desert (hot) climate.

St. Marys, PA

Annual avg
45.1°F
Annual precip
46.4 in
Warmest month
July (78.5°F)
Coldest month
January (13.1°F)
Annual swing
45°F
Pleasant months
3 / 12
Warm-summer humid continental Dfb USDA Zone 6b

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

St. Marys

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 St. Marys Phoenix
High Low Precip High Low Precip
January 30.5°F 13.1°F 3.47 in 65.4°F 44.1°F 1.17 in
February 33.3°F 13.5°F 2.68 in 68.1°F 46.1°F 1.21 in
March 42.5°F 20.9°F 3.38 in 75.0°F 50.9°F 1.09 in
April 56.4°F 31.0°F 3.95 in 82.5°F 56.6°F 0.35 in
May 67.4°F 41.9°F 4.32 in 91.5°F 64.7°F 0.19 in
June 74.7°F 50.8°F 4.48 in 101.5°F 72.7°F 0.03 in
July 78.5°F 55.0°F 4.67 in 104.0°F 80.8°F 0.81 in
August 77.4°F 53.7°F 4.25 in 102.5°F 80.5°F 0.96 in
September 71.1°F 47.5°F 3.95 in 97.5°F 74.7°F 0.71 in
October 58.7°F 37.0°F 3.87 in 86.3°F 62.7°F 0.67 in
November 45.6°F 28.0°F 3.78 in 74.0°F 50.8°F 0.90 in
December 34.5°F 19.7°F 3.60 in 63.9°F 42.7°F 0.81 in
St. Marys overview
Full climate profile
 Phoenix overview
Full climate profile