Napa, CA vs Denver, CO

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

Napa is warmer than Denver (60.3°F vs 51.4°F annual avg) and wetter than it (26.7 in vs 15.4 in per year). Napa has a Warm-summer Mediterranean climate; Denver a Semi-arid (cold) climate.

Napa, CA

Annual avg
60.3°F
Annual precip
26.7 in
Warmest month
September (84.4°F)
Coldest month
December (39.7°F)
Annual swing
20.5°F
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

Napa

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 Napa Denver
High Low Precip High Low Precip
January 58.6°F 40.1°F 4.98 in 46.5°F 17.6°F 0.46 in
February 63.2°F 41.9°F 5.13 in 47.5°F 19.3°F 0.53 in
March 67.5°F 43.6°F 3.67 in 56.4°F 27.1°F 1.12 in
April 72.1°F 45.6°F 1.72 in 62.5°F 33.7°F 1.67 in
May 76.6°F 49.9°F 1.08 in 71.7°F 43.4°F 2.29 in
June 82.3°F 53.7°F 0.29 in 84.1°F 52.9°F 1.68 in
July 83.3°F 55.5°F 0.00 in 90.2°F 59.3°F 2.12 in
August 83.7°F 55.5°F 0.06 in 87.9°F 57.2°F 1.83 in
September 84.4°F 53.4°F 0.09 in 80.1°F 48.2°F 1.51 in
October 78.1°F 49.3°F 1.34 in 66.7°F 35.7°F 0.98 in
November 66.2°F 43.6°F 2.77 in 54.8°F 25.5°F 0.70 in
December 58.5°F 39.7°F 5.53 in 45.9°F 17.7°F 0.47 in
Napa overview
Full climate profile
 Denver overview
Full climate profile