Skip to content
VSWeather

Phoenix, AZ vs San Mateo, CA weather comparison

Phoenix

AZ

Phoenix endures about 155 more days above 90 °F each year.

Phoenix sees rain or snow on roughly 23 fewer days each year. Phoenix enjoys about 73 more sunny days a year than San Mateo.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Phoenix, AZ and San Mateo, CA
PhoenixMetricSan Mateo
307 daysSunny daysclear or partly cloudy skies234 days
7 inPrecipitationper year21 in
33 daysWet daysrain or snow per year56 days
0 inSnowfallper year0 in
163 daysHot daysabove 90 °F8 days
2 daysFreezing nightsat or below 32 °F2 days
35%Humidityaverage relative77%
74 °FAverage temperatureyear round59 °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 Mateo

Daily highs

6080100JanMarMayJulSepNovPhoenix, 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 Mateo, Jan: 58 °FSan Mateo, Feb: 61 °FSan Mateo, Mar: 64 °FSan Mateo, Apr: 66 °FSan Mateo, May: 69 °FSan Mateo, Jun: 73 °FSan Mateo, Jul: 74 °FSan Mateo, Aug: 75 °FSan Mateo, Sep: 76 °FSan Mateo, Oct: 73 °FSan Mateo, Nov: 64 °FSan Mateo, Dec: 58 °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 Mateo, Jan: 44 °FSan Mateo, Feb: 45 °FSan Mateo, Mar: 46 °FSan Mateo, Apr: 48 °FSan Mateo, May: 51 °FSan Mateo, Jun: 53 °FSan Mateo, Jul: 55 °FSan Mateo, Aug: 56 °FSan Mateo, Sep: 55 °FSan Mateo, Oct: 52 °FSan Mateo, Nov: 47 °FSan Mateo, Dec: 44 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix high666976839210210510398877565
San Mateo high586164666973747576736458
Phoenix low444752586775828276645143
San Mateo low444546485153555655524744

Monthly precipitation

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

PhoenixSan Mateo
0.02.04.0JanMarMayJulSepNovPhoenix, 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 Mateo, Jan: 3.9 inSan Mateo, Feb: 4.2 inSan Mateo, Mar: 3.2 inSan Mateo, Apr: 1.6 inSan Mateo, May: 0.8 inSan Mateo, Jun: 0.2 inSan Mateo, Jul: 0.0 inSan Mateo, Aug: 0.0 inSan Mateo, Sep: 0.1 inSan Mateo, Oct: 0.9 inSan Mateo, Nov: 2.0 inSan Mateo, Dec: 3.7 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 Mateo3.94.23.21.60.80.20.00.00.10.92.03.7

Monthly sunny days

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

PhoenixSan Mateo
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 Mateo, Jan: 13 daysSan Mateo, Feb: 13 daysSan Mateo, Mar: 15 daysSan Mateo, Apr: 18 daysSan Mateo, May: 20 daysSan Mateo, Jun: 23 daysSan Mateo, Jul: 26 daysSan Mateo, Aug: 25 daysSan Mateo, Sep: 26 daysSan Mateo, Oct: 23 daysSan Mateo, Nov: 18 daysSan Mateo, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix232125272929242628282524
San Mateo131315182023262526231815

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 Mateo vs another city

See the full San Mateo, 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).