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Phoenix, AZ vs Thermalito, CA weather comparison

Phoenix

AZ

Thermalito picks up around 17 more inches of snow each winter.

Phoenix sees rain or snow on roughly 40 fewer days each year. Phoenix endures about 70 more days above 90 °F each year.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Phoenix, AZ and Thermalito, CA
PhoenixMetricThermalito
307 daysSunny daysclear or partly cloudy skies261 days
7 inPrecipitationper year43 in
33 daysWet daysrain or snow per year74 days
0 inSnowfallper year17 in
163 daysHot daysabove 90 °F93 days
2 daysFreezing nightsat or below 32 °F12 days
35%Humidityaverage relative57%
74 °FAverage temperatureyear round63 °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.

PhoenixThermalito

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 °FThermalito, Jan: 56 °FThermalito, Feb: 61 °FThermalito, Mar: 66 °FThermalito, Apr: 73 °FThermalito, May: 81 °FThermalito, Jun: 90 °FThermalito, Jul: 96 °FThermalito, Aug: 94 °FThermalito, Sep: 89 °FThermalito, Oct: 79 °FThermalito, Nov: 64 °FThermalito, Dec: 56 °F

Daily lows

406080JanMarMayJulSepNovPhoenix, 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 °FThermalito, Jan: 40 °FThermalito, Feb: 42 °FThermalito, Mar: 45 °FThermalito, Apr: 48 °FThermalito, May: 55 °FThermalito, Jun: 61 °FThermalito, Jul: 65 °FThermalito, Aug: 63 °FThermalito, Sep: 59 °FThermalito, Oct: 51 °FThermalito, Nov: 44 °FThermalito, Dec: 40 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix high666976839210210510398877565
Thermalito high566166738190969489796456
Phoenix low444752586775828276645143
Thermalito low404245485561656359514440

Monthly precipitation

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

PhoenixThermalito
0.02.55.07.5JanMarMayJulSepNovPhoenix, 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 inThermalito, Jan: 7.8 inThermalito, Feb: 7.5 inThermalito, Mar: 6.4 inThermalito, Apr: 3.2 inThermalito, May: 2.0 inThermalito, Jun: 0.5 inThermalito, Jul: 0.0 inThermalito, Aug: 0.1 inThermalito, Sep: 0.3 inThermalito, Oct: 2.2 inThermalito, Nov: 4.5 inThermalito, Dec: 8.5 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix0.91.10.80.20.10.10.60.90.70.60.50.8
Thermalito7.87.56.43.22.00.50.00.10.32.24.58.5

Monthly sunny days

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

PhoenixThermalito
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 daysThermalito, Jan: 15 daysThermalito, Feb: 14 daysThermalito, Mar: 16 daysThermalito, Apr: 19 daysThermalito, May: 23 daysThermalito, Jun: 27 daysThermalito, Jul: 30 daysThermalito, Aug: 30 daysThermalito, Sep: 29 daysThermalito, Oct: 26 daysThermalito, Nov: 18 daysThermalito, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix232125272929242628282524
Thermalito151416192327303029261815

Keep comparing

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

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).