Grass Valley, CA vs Phoenix, AZ

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

Grass Valley is cooler than Phoenix (56.1°F vs 72.5°F annual avg) and wetter than it (53.2 in vs 8.9 in per year). Grass Valley has a Hot-summer Mediterranean climate; Phoenix a Desert (hot) climate.

Grass Valley, CA

Annual avg
56.1°F
Annual precip
53.2 in
Warmest month
July (88.0°F)
Coldest month
December (32.6°F)
Annual swing
30.5°F
Hot-summer Mediterranean Csa 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

Grass Valley

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 Grass Valley Phoenix
High Low Precip High Low Precip
January 53.6°F 33.1°F 9.30 in 65.4°F 44.1°F 1.17 in
February 54.9°F 34.2°F 8.98 in 68.1°F 46.1°F 1.21 in
March 57.9°F 37.0°F 8.16 in 75.0°F 50.9°F 1.09 in
April 62.7°F 40.0°F 4.43 in 82.5°F 56.6°F 0.35 in
May 70.8°F 46.8°F 2.48 in 91.5°F 64.7°F 0.19 in
June 80.2°F 52.6°F 0.74 in 101.5°F 72.7°F 0.03 in
July 88.0°F 58.2°F 0.00 in 104.0°F 80.8°F 0.81 in
August 87.4°F 56.8°F 0.11 in 102.5°F 80.5°F 0.96 in
September 82.3°F 52.1°F 0.44 in 97.5°F 74.7°F 0.71 in
October 72.1°F 44.2°F 2.56 in 86.3°F 62.7°F 0.67 in
November 59.8°F 37.1°F 5.52 in 74.0°F 50.8°F 0.90 in
December 52.6°F 32.6°F 10.48 in 63.9°F 42.7°F 0.81 in
Grass Valley overview
Full climate profile
 Phoenix overview
Full climate profile