Herndon, VA vs Phoenix, AZ

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

Herndon is cooler than Phoenix (55.7°F vs 72.5°F annual avg) and wetter than it (43.2 in vs 8.9 in per year). Herndon has a Humid subtropical climate; Phoenix a Desert (hot) climate.

Herndon, VA

Annual avg
55.7°F
Annual precip
43.2 in
Warmest month
July (87.6°F)
Coldest month
January (25.2°F)
Annual swing
43.3°F
Pleasant months
2 / 12
Humid subtropical Cfa USDA Zone 8a

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

Herndon

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 Herndon Phoenix
High Low Precip High Low Precip
January 42.6°F 25.2°F 2.94 in 65.4°F 44.1°F 1.17 in
February 46.1°F 26.7°F 2.61 in 68.1°F 46.1°F 1.21 in
March 54.8°F 33.6°F 3.50 in 75.0°F 50.9°F 1.09 in
April 66.8°F 43.2°F 3.47 in 82.5°F 56.6°F 0.35 in
May 75.0°F 53.0°F 4.72 in 91.5°F 64.7°F 0.19 in
June 83.1°F 61.9°F 4.30 in 101.5°F 72.7°F 0.03 in
July 87.6°F 66.8°F 4.15 in 104.0°F 80.8°F 0.81 in
August 86.3°F 65.2°F 3.53 in 102.5°F 80.5°F 0.96 in
September 79.3°F 57.9°F 3.94 in 97.5°F 74.7°F 0.71 in
October 67.8°F 45.3°F 3.65 in 86.3°F 62.7°F 0.67 in
November 56.5°F 35.6°F 3.13 in 74.0°F 50.8°F 0.90 in
December 46.5°F 29.0°F 3.30 in 63.9°F 42.7°F 0.81 in
Herndon overview
Full climate profile
 Phoenix overview
Full climate profile