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Petaluma, CA vs Phoenix, AZ weather comparison

Petaluma

CA

Phoenix endures about 142 more days above 90 °F each year.

Phoenix sees rain or snow on roughly 26 fewer days each year. Phoenix enjoys about 54 more sunny days a year than Petaluma.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Petaluma, CA and Phoenix, AZ
PetalumaMetricPhoenix
254 daysSunny daysclear or partly cloudy skies307 days
28 inPrecipitationper year7 in
59 daysWet daysrain or snow per year33 days
0 inSnowfallper year0 in
21 daysHot daysabove 90 °F163 days
20 daysFreezing nightsat or below 32 °F2 days
73%Humidityaverage relative35%
58 °FAverage temperatureyear round74 °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.

PetalumaPhoenix

Daily highs

6080100JanMarMayJulSepNovPetaluma, Jan: 58 °FPetaluma, Feb: 61 °FPetaluma, Mar: 65 °FPetaluma, Apr: 68 °FPetaluma, May: 72 °FPetaluma, Jun: 78 °FPetaluma, Jul: 81 °FPetaluma, Aug: 81 °FPetaluma, Sep: 82 °FPetaluma, Oct: 76 °FPetaluma, Nov: 65 °FPetaluma, Dec: 58 °FPhoenix, 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 °F

Daily lows

406080JanMarMayJulSepNovPetaluma, Jan: 39 °FPetaluma, Feb: 40 °FPetaluma, Mar: 42 °FPetaluma, Apr: 44 °FPetaluma, May: 47 °FPetaluma, Jun: 50 °FPetaluma, Jul: 52 °FPetaluma, Aug: 53 °FPetaluma, Sep: 51 °FPetaluma, Oct: 48 °FPetaluma, Nov: 42 °FPetaluma, Dec: 38 °FPhoenix, 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 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Petaluma high586165687278818182766558
Phoenix high666976839210210510398877565
Petaluma low394042444750525351484238
Phoenix low444752586775828276645143

Monthly precipitation

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

PetalumaPhoenix
0.02.04.06.0JanMarMayJulSepNovPetaluma, Jan: 5.4 inPetaluma, Feb: 5.7 inPetaluma, Mar: 4.2 inPetaluma, Apr: 1.9 inPetaluma, May: 1.0 inPetaluma, Jun: 0.2 inPetaluma, Jul: 0.0 inPetaluma, Aug: 0.0 inPetaluma, Sep: 0.1 inPetaluma, Oct: 1.2 inPetaluma, Nov: 2.8 inPetaluma, Dec: 5.5 inPhoenix, 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 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Petaluma5.45.74.21.91.00.20.00.00.11.22.85.5
Phoenix0.91.10.80.20.10.10.60.90.70.60.50.8

Monthly sunny days

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

PetalumaPhoenix
0102030JanMarMayJulSepNovPetaluma, Jan: 13 daysPetaluma, Feb: 13 daysPetaluma, Mar: 16 daysPetaluma, Apr: 20 daysPetaluma, May: 23 daysPetaluma, Jun: 26 daysPetaluma, Jul: 29 daysPetaluma, Aug: 29 daysPetaluma, Sep: 28 daysPetaluma, Oct: 24 daysPetaluma, Nov: 18 daysPetaluma, Dec: 15 daysPhoenix, 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 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Petaluma131316202326292928241815
Phoenix232125272929242628282524

Keep comparing

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

Petaluma vs another city

See the full Petaluma, CA climate profile

More California cities

Phoenix vs another city

See the full Phoenix, AZ climate profile

More Arizona 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).