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Phoenix, AZ vs San Diego, CA weather comparison

Phoenix

AZ

Phoenix endures about 148 more days above 90 °F each year.

Phoenix enjoys about 25 more sunny days a year than San Diego.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Phoenix, AZ and San Diego, CA
PhoenixMetricSan Diego
307 daysSunny daysclear or partly cloudy skies283 days
7 inPrecipitationper year12 in
33 daysWet daysrain or snow per year38 days
0 inSnowfallper year0 in
163 daysHot daysabove 90 °F15 days
2 daysFreezing nightsat or below 32 °F0 days
35%Humidityaverage relative74%
74 °FAverage temperatureyear round64 °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.

PhoenixSan Diego

Daily highs

80100JanMarMayJulSepNovPhoenix, Jan: 66 °FPhoenix, Feb: 69 °FPhoenix, Mar: 76 °FPhoenix, Apr: 83 °FPhoenix, May: 92 °FPhoenix, Jun: 102 °FPhoenix, Jul: 105 °FPhoenix, Aug: 103 °FPhoenix, Sep: 98 °FPhoenix, Oct: 87 °FPhoenix, Nov: 75 °FPhoenix, Dec: 65 °FSan Diego, Jan: 67 °FSan Diego, Feb: 67 °FSan Diego, Mar: 69 °FSan Diego, Apr: 71 °FSan Diego, May: 72 °FSan Diego, Jun: 75 °FSan Diego, Jul: 80 °FSan Diego, Aug: 82 °FSan Diego, Sep: 81 °FSan Diego, Oct: 78 °FSan Diego, Nov: 73 °FSan Diego, Dec: 67 °F

Daily lows

6080JanMarMayJulSepNovPhoenix, Jan: 44 °FPhoenix, Feb: 47 °FPhoenix, Mar: 52 °FPhoenix, Apr: 58 °FPhoenix, May: 67 °FPhoenix, Jun: 75 °FPhoenix, Jul: 82 °FPhoenix, Aug: 82 °FPhoenix, Sep: 76 °FPhoenix, Oct: 64 °FPhoenix, Nov: 51 °FPhoenix, Dec: 43 °FSan Diego, Jan: 46 °FSan Diego, Feb: 47 °FSan Diego, Mar: 50 °FSan Diego, Apr: 53 °FSan Diego, May: 57 °FSan Diego, Jun: 60 °FSan Diego, Jul: 64 °FSan Diego, Aug: 65 °FSan Diego, Sep: 64 °FSan Diego, Oct: 58 °FSan Diego, Nov: 50 °FSan Diego, Dec: 45 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix high666976839210210510398877565
San Diego high676769717275808281787367
Phoenix low444752586775828276645143
San Diego low464750535760646564585045

Monthly precipitation

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

PhoenixSan Diego
0.01.02.03.0JanMarMayJulSepNovPhoenix, Jan: 0.9 inPhoenix, Feb: 1.1 inPhoenix, Mar: 0.8 inPhoenix, Apr: 0.2 inPhoenix, May: 0.1 inPhoenix, Jun: 0.1 inPhoenix, Jul: 0.6 inPhoenix, Aug: 0.9 inPhoenix, Sep: 0.7 inPhoenix, Oct: 0.6 inPhoenix, Nov: 0.5 inPhoenix, Dec: 0.8 inSan Diego, Jan: 2.3 inSan Diego, Feb: 2.9 inSan Diego, Mar: 1.9 inSan Diego, Apr: 0.9 inSan Diego, May: 0.4 inSan Diego, Jun: 0.1 inSan Diego, Jul: 0.1 inSan Diego, Aug: 0.1 inSan Diego, Sep: 0.2 inSan Diego, Oct: 0.6 inSan Diego, Nov: 0.9 inSan Diego, Dec: 1.9 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix0.91.10.80.20.10.10.60.90.70.60.50.8
San Diego2.32.91.90.90.40.10.10.10.20.60.91.9

Monthly sunny days

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

PhoenixSan Diego
0102030JanMarMayJulSepNovPhoenix, Jan: 23 daysPhoenix, Feb: 21 daysPhoenix, Mar: 25 daysPhoenix, Apr: 27 daysPhoenix, May: 29 daysPhoenix, Jun: 29 daysPhoenix, Jul: 24 daysPhoenix, Aug: 26 daysPhoenix, Sep: 28 daysPhoenix, Oct: 28 daysPhoenix, Nov: 25 daysPhoenix, Dec: 24 daysSan Diego, Jan: 20 daysSan Diego, Feb: 17 daysSan Diego, Mar: 20 daysSan Diego, Apr: 22 daysSan Diego, May: 22 daysSan Diego, Jun: 26 daysSan Diego, Jul: 28 daysSan Diego, Aug: 30 daysSan Diego, Sep: 28 daysSan Diego, Oct: 26 daysSan Diego, Nov: 24 daysSan Diego, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix232125272929242628282524
San Diego201720222226283028262421

Keep comparing

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

Phoenix vs another city

See the full Phoenix, AZ climate profile

More Arizona cities

San Diego vs another city

See the full San Diego, CA climate profile

More California 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).