Climateby Month

San Francisco vs Denver weather

San Francisco, CA and Denver, CO · 948 mi apart

July highs: 66°F in San Francisco, 90°F in Denver (Denver is 24°F warmer). January highs: 58°F and 47°F (San Francisco is 11°F warmer). San Francisco has about 71 wet days a year, Denver about 84. Snow: 0.0 in a year in San Francisco, 49.0 in in Denver.

San Francisco, CA

0°20°40°60°80°100° January: normal high 58°F (14°C), low 47°F (8°C) 58° 47° February: normal high 60°F (16°C), low 48°F (9°C) March: normal high 62°F (17°C), low 49°F (9°C) April: normal high 63°F (17°C), low 50°F (10°C) May: normal high 64°F (18°C), low 51°F (11°C) June: normal high 67°F (19°C), low 53°F (12°C) July: normal high 66°F (19°C), low 54°F (12°C) August: normal high 68°F (20°C), low 56°F (13°C) September: normal high 70°F (21°C), low 56°F (13°C) 70° 56° October: normal high 70°F (21°C), low 54°F (12°C) November: normal high 64°F (18°C), low 51°F (11°C) December: normal high 58°F (14°C), low 47°F (8°C) JFMAMJJASOND

Best months: July, August

Denver, CO

0°20°40°60°80°100° January: normal high 47°F (8°C), low 18°F (-8°C) February: normal high 48°F (9°C), low 19°F (-7°C) March: normal high 56°F (13°C), low 27°F (-3°C) April: normal high 63°F (17°C), low 34°F (1°C) May: normal high 72°F (22°C), low 43°F (6°C) June: normal high 84°F (29°C), low 53°F (12°C) July: normal high 90°F (32°C), low 59°F (15°C) 90° 59° August: normal high 88°F (31°C), low 57°F (14°C) September: normal high 80°F (27°C), low 48°F (9°C) October: normal high 67°F (19°C), low 36°F (2°C) November: normal high 55°F (13°C), low 26°F (-3°C) December: normal high 46°F (8°C), low 18°F (-8°C) 46° 18° JFMAMJJASOND

Best months: May

Which city for what

  • Milder winters: San Francisco (January high 58°F vs January high 47°F)
  • Cooler summers: San Francisco (July high 66°F vs July high 90°F)
  • Fewer wet days: San Francisco (71 a year vs 84 a year)
  • Less snow: San Francisco (0.0 in vs 49.0 in)
  • Longer growing season: San Francisco (365 frost-free days vs 156 frost-free days)
  • More comfortable days: San Francisco (151 a year vs 92 a year)

Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.

Season by season

SeasonAvg high San FranciscoAvg high DenverWet days San FranciscoWet days Denver
Winter (Dec-Feb)59°F47°F3415
Spring (Mar-May)63°F64°F2226
Summer (Jun-Aug)67°F87°F326
Fall (Sep-Nov)68°F67°F1317

Side by side over a year

San FranciscoDenver
Hot days (90°F+)342
Freezing nights0156
Muggy days00
Comfortable days15192
Precipitation22.9 in15.4 in
Snowfall0.0 in49.0 in
Frost datesfrost-freelast May 4, first Oct 8
Daylight in June / December14.7 h / 9.6 h14.9 h / 9.4 h
Best monthsJuly, AugustMay

Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F.

Month by month

MonthHigh San FranciscoHigh DenverWet days San FranciscoWet days Denver
January58°F47°F115
February60°F48°F115
March62°F56°F117
April63°F63°F78
May64°F72°F411
June67°F84°F28
July66°F90°F19
August68°F88°F19
September70°F80°F16
October70°F67°F45
November64°F55°F86
December58°F46°F125

Both charts use the same temperature scale.

Where the numbers come from

  • San Francisco, CA: temperature from San Francisco Downtown (USW00023272), 0.5 mi SW of the city center; precipitation from San Francisco Downtown (USW00023272). NOAA 1991-2020 normals and daily records.
  • Denver, CO: temperature from Denver-Stapleton (USW00023062), 6.3 mi ENE of the city center; precipitation from Denver-Stapleton (USW00023062). NOAA 1991-2020 normals and daily records.

Every station for each city, including humidity and frost, is listed on the city page. Methodology.