Vallejo, CA vs Phoenix, AZ

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

Vallejo is cooler than Phoenix (61.6°F vs 72.5°F annual avg) and wetter than it (21.5 in vs 8.9 in per year). Vallejo has a Warm-summer Mediterranean climate; Phoenix a Desert (hot) climate.

Vallejo, CA

Annual avg
61.6°F
Annual precip
21.5 in
Warmest month
September (86.1°F)
Coldest month
January (42.0°F)
Annual swing
21.6°F
Pleasant months
2 / 12
Warm-summer Mediterranean Csb USDA Zone 9b

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

Vallejo

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 Vallejo Phoenix
High Low Precip High Low Precip
January 57.3°F 42.0°F 4.46 in 65.4°F 44.1°F 1.17 in
February 63.1°F 45.0°F 3.58 in 68.1°F 46.1°F 1.21 in
March 68.4°F 45.9°F 3.18 in 75.0°F 50.9°F 1.09 in
April 72.7°F 47.2°F 1.45 in 82.5°F 56.6°F 0.35 in
May 78.4°F 50.9°F 0.80 in 91.5°F 64.7°F 0.19 in
June 83.1°F 54.1°F 0.22 in 101.5°F 72.7°F 0.03 in
July 85.4°F 55.7°F 0.00 in 104.0°F 80.8°F 0.81 in
August 86.0°F 56.1°F 0.04 in 102.5°F 80.5°F 0.96 in
September 86.1°F 56.5°F 0.08 in 97.5°F 74.7°F 0.71 in
October 79.0°F 53.6°F 1.02 in 86.3°F 62.7°F 0.67 in
November 65.5°F 47.0°F 2.17 in 74.0°F 50.8°F 0.90 in
December 57.6°F 42.0°F 4.49 in 63.9°F 42.7°F 0.81 in
Vallejo overview
Full climate profile
 Phoenix overview
Full climate profile