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San Francisco, CA vs Seattle, WA weather comparison

San Francisco

CA

San Francisco sees rain or snow on roughly 86 fewer days each year.

San Francisco enjoys about 101 more sunny days a year than Seattle.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for San Francisco, CA and Seattle, WA
San FranciscoMetricSeattle
248 daysSunny daysclear or partly cloudy skies147 days
23 inPrecipitationper year37 in
71 daysWet daysrain or snow per year157 days
0 inSnowfallper year6 in
3 daysHot daysabove 90 °F3 days
0 daysFreezing nightsat or below 32 °F28 days
77%Humidityaverage relative78%
58 °FAverage temperatureyear round54 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

San FranciscoSeattle

Daily highs

506070JanMarMayJulSepNovSan Francisco, Jan: 58 °FSan Francisco, Feb: 60 °FSan Francisco, Mar: 62 °FSan Francisco, Apr: 63 °FSan Francisco, May: 64 °FSan Francisco, Jun: 66 °FSan Francisco, Jul: 66 °FSan Francisco, Aug: 68 °FSan Francisco, Sep: 70 °FSan Francisco, Oct: 70 °FSan Francisco, Nov: 64 °FSan Francisco, Dec: 58 °FSeattle, Jan: 48 °FSeattle, Feb: 50 °FSeattle, Mar: 55 °FSeattle, Apr: 59 °FSeattle, May: 66 °FSeattle, Jun: 71 °FSeattle, Jul: 77 °FSeattle, Aug: 77 °FSeattle, Sep: 72 °FSeattle, Oct: 61 °FSeattle, Nov: 53 °FSeattle, Dec: 47 °F

Daily lows

4050JanMarMayJulSepNovSan Francisco, Jan: 47 °FSan Francisco, Feb: 48 °FSan Francisco, Mar: 49 °FSan Francisco, Apr: 50 °FSan Francisco, May: 51 °FSan Francisco, Jun: 53 °FSan Francisco, Jul: 55 °FSan Francisco, Aug: 56 °FSan Francisco, Sep: 56 °FSan Francisco, Oct: 54 °FSan Francisco, Nov: 51 °FSan Francisco, Dec: 47 °FSeattle, Jan: 37 °FSeattle, Feb: 37 °FSeattle, Mar: 39 °FSeattle, Apr: 43 °FSeattle, May: 49 °FSeattle, Jun: 53 °FSeattle, Jul: 57 °FSeattle, Aug: 58 °FSeattle, Sep: 54 °FSeattle, Oct: 47 °FSeattle, Nov: 40 °FSeattle, Dec: 37 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Francisco high586062636466666870706458
Seattle high485055596671777772615347
San Francisco low474849505153555656545147
Seattle low373739434953575854474037

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

San FranciscoSeattle
0.02.04.0JanMarMayJulSepNovSan Francisco, Jan: 4.5 inSan Francisco, Feb: 4.7 inSan Francisco, Mar: 3.5 inSan Francisco, Apr: 1.6 inSan Francisco, May: 0.8 inSan Francisco, Jun: 0.2 inSan Francisco, Jul: 0.0 inSan Francisco, Aug: 0.0 inSan Francisco, Sep: 0.1 inSan Francisco, Oct: 1.0 inSan Francisco, Nov: 2.2 inSan Francisco, Dec: 4.2 inSeattle, Jan: 4.9 inSeattle, Feb: 3.4 inSeattle, Mar: 3.9 inSeattle, Apr: 3.2 inSeattle, May: 2.1 inSeattle, Jun: 1.7 inSeattle, Jul: 0.7 inSeattle, Aug: 0.9 inSeattle, Sep: 1.9 inSeattle, Oct: 3.7 inSeattle, Nov: 5.4 inSeattle, Dec: 5.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Francisco4.54.73.51.60.80.20.00.00.11.02.24.2
Seattle4.93.43.93.22.11.70.70.91.93.75.45.0

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

San FranciscoSeattle
01020JanMarMayJulSepNovSan Francisco, Jan: 14 daysSan Francisco, Feb: 13 daysSan Francisco, Mar: 16 daysSan Francisco, Apr: 19 daysSan Francisco, May: 22 daysSan Francisco, Jun: 25 daysSan Francisco, Jul: 28 daysSan Francisco, Aug: 27 daysSan Francisco, Sep: 27 daysSan Francisco, Oct: 24 daysSan Francisco, Nov: 18 daysSan Francisco, Dec: 15 daysSeattle, Jan: 7 daysSeattle, Feb: 10 daysSeattle, Mar: 9 daysSeattle, Apr: 10 daysSeattle, May: 12 daysSeattle, Jun: 13 daysSeattle, Jul: 20 daysSeattle, Aug: 21 daysSeattle, Sep: 18 daysSeattle, Oct: 12 daysSeattle, Nov: 8 daysSeattle, Dec: 7 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Francisco141316192225282727241815
Seattle71091012132021181287

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

San Francisco vs another city

See the full San Francisco, CA climate profile

More California cities

Seattle vs another city

See the full Seattle, WA climate profile

More Washington cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).