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Phoenix, AZ vs Rio Vista, CA weather comparison

Phoenix

AZ

Phoenix endures about 99 more days above 90 °F each year.

Phoenix sees rain or snow on roughly 20 fewer days each year. Phoenix enjoys about 43 more sunny days a year than Rio Vista.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Phoenix, AZ and Rio Vista, CA
PhoenixMetricRio Vista
307 daysSunny daysclear or partly cloudy skies264 days
7 inPrecipitationper year20 in
33 daysWet daysrain or snow per year53 days
0 inSnowfallper year0 in
163 daysHot daysabove 90 °F64 days
2 daysFreezing nightsat or below 32 °F6 days
35%Humidityaverage relative66%
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.

PhoenixRio Vista

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 °FRio Vista, Jan: 56 °FRio Vista, Feb: 61 °FRio Vista, Mar: 67 °FRio Vista, Apr: 72 °FRio Vista, May: 79 °FRio Vista, Jun: 86 °FRio Vista, Jul: 91 °FRio Vista, Aug: 90 °FRio Vista, Sep: 87 °FRio Vista, Oct: 78 °FRio Vista, Nov: 65 °FRio Vista, 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 °FRio Vista, Jan: 40 °FRio Vista, Feb: 44 °FRio Vista, Mar: 47 °FRio Vista, Apr: 49 °FRio Vista, May: 54 °FRio Vista, Jun: 59 °FRio Vista, Jul: 61 °FRio Vista, Aug: 60 °FRio Vista, Sep: 59 °FRio Vista, Oct: 54 °FRio Vista, Nov: 46 °FRio Vista, Dec: 40 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix high666976839210210510398877565
Rio Vista high566167727986919087786556
Phoenix low444752586775828276645143
Rio Vista low404447495459616059544640

Monthly precipitation

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

PhoenixRio Vista
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 inRio Vista, Jan: 4.2 inRio Vista, Feb: 4.0 inRio Vista, Mar: 3.0 inRio Vista, Apr: 1.3 inRio Vista, May: 0.7 inRio Vista, Jun: 0.2 inRio Vista, Jul: 0.0 inRio Vista, Aug: 0.1 inRio Vista, Sep: 0.1 inRio Vista, Oct: 1.0 inRio Vista, Nov: 2.0 inRio Vista, Dec: 3.9 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix0.91.10.80.20.10.10.60.90.70.60.50.8
Rio Vista4.24.03.01.30.70.20.00.10.11.02.03.9

Monthly sunny days

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

PhoenixRio Vista
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 daysRio Vista, Jan: 13 daysRio Vista, Feb: 14 daysRio Vista, Mar: 17 daysRio Vista, Apr: 20 daysRio Vista, May: 25 daysRio Vista, Jun: 27 daysRio Vista, Jul: 30 daysRio Vista, Aug: 30 daysRio Vista, Sep: 29 daysRio Vista, Oct: 26 daysRio Vista, Nov: 19 daysRio Vista, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix232125272929242628282524
Rio Vista131417202527303029261915

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

Rio Vista vs another city

See the full Rio Vista, 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).