Petaluma, CA vs Denver, CO

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

Petaluma is warmer than Denver (58°F vs 51.4°F annual avg) and wetter than it (25.6 in vs 15.4 in per year). Petaluma has a Warm-summer Mediterranean climate; Denver a Semi-arid (cold) climate.

Petaluma, CA

Annual avg
58°F
Annual precip
25.6 in
Warmest month
September (81.6°F)
Coldest month
December (38.4°F)
Annual swing
18.9°F
Pleasant months
1 / 12
Warm-summer Mediterranean Csb USDA Zone 9a

Denver, CO

Annual avg
51.4°F
Annual precip
15.4 in
Warmest month
July (90.2°F)
Coldest month
January (17.6°F)
Annual swing
43°F
Semi-arid (cold) BSk USDA Zone 7a

Best months to visit each city

Petaluma

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

Denver

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

Month-by-month comparison

Month Petaluma Denver
High Low Precip High Low Precip
January 57.6°F 39.0°F 4.77 in 46.5°F 17.6°F 0.46 in
February 61.3°F 40.4°F 5.23 in 47.5°F 19.3°F 0.53 in
March 64.5°F 41.9°F 3.32 in 56.4°F 27.1°F 1.12 in
April 67.8°F 43.8°F 1.68 in 62.5°F 33.7°F 1.67 in
May 71.9°F 47.4°F 0.93 in 71.7°F 43.4°F 2.29 in
June 78.1°F 50.4°F 0.28 in 84.1°F 52.9°F 1.68 in
July 80.8°F 52.4°F 0.01 in 90.2°F 59.3°F 2.12 in
August 81.2°F 52.8°F 0.05 in 87.9°F 57.2°F 1.83 in
September 81.6°F 51.4°F 0.09 in 80.1°F 48.2°F 1.51 in
October 76.4°F 47.6°F 1.27 in 66.7°F 35.7°F 0.98 in
November 65.5°F 42.3°F 2.74 in 54.8°F 25.5°F 0.70 in
December 57.9°F 38.4°F 5.19 in 45.9°F 17.7°F 0.47 in
Petaluma overview
Full climate profile
 Denver overview
Full climate profile