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Diamond Bar, CA vs Phoenix, AZ weather comparison

Diamond Bar

CA

Phoenix endures about 93 more days above 90 °F each year.

Phoenix enjoys about 17 more sunny days a year than Diamond Bar.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Diamond Bar, CA and Phoenix, AZ
Diamond BarMetricPhoenix
290 daysSunny daysclear or partly cloudy skies307 days
16 inPrecipitationper year7 in
38 daysWet daysrain or snow per year33 days
0 inSnowfallper year0 in
70 daysHot daysabove 90 °F163 days
3 daysFreezing nightsat or below 32 °F2 days
63%Humidityaverage relative35%
66 °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.

Diamond BarPhoenix

Daily highs

80100JanMarMayJulSepNovDiamond Bar, Jan: 69 °FDiamond Bar, Feb: 69 °FDiamond Bar, Mar: 73 °FDiamond Bar, Apr: 76 °FDiamond Bar, May: 79 °FDiamond Bar, Jun: 84 °FDiamond Bar, Jul: 90 °FDiamond Bar, Aug: 92 °FDiamond Bar, Sep: 89 °FDiamond Bar, Oct: 82 °FDiamond Bar, Nov: 75 °FDiamond Bar, Dec: 68 °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

406080JanMarMayJulSepNovDiamond Bar, Jan: 44 °FDiamond Bar, Feb: 45 °FDiamond Bar, Mar: 48 °FDiamond Bar, Apr: 51 °FDiamond Bar, May: 55 °FDiamond Bar, Jun: 58 °FDiamond Bar, Jul: 63 °FDiamond Bar, Aug: 64 °FDiamond Bar, Sep: 61 °FDiamond Bar, Oct: 55 °FDiamond Bar, Nov: 48 °FDiamond Bar, Dec: 43 °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
Diamond Bar high696973767984909289827568
Phoenix high666976839210210510398877565
Diamond Bar low444548515558636461554843
Phoenix low444752586775828276645143

Monthly precipitation

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

Diamond BarPhoenix
0.02.04.0JanMarMayJulSepNovDiamond Bar, Jan: 3.6 inDiamond Bar, Feb: 4.0 inDiamond Bar, Mar: 2.4 inDiamond Bar, Apr: 1.0 inDiamond Bar, May: 0.4 inDiamond Bar, Jun: 0.1 inDiamond Bar, Jul: 0.1 inDiamond Bar, Aug: 0.0 inDiamond Bar, Sep: 0.2 inDiamond Bar, Oct: 0.7 inDiamond Bar, Nov: 1.0 inDiamond Bar, Dec: 2.4 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
Diamond Bar3.64.02.41.00.40.10.10.00.20.71.02.4
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.

Diamond BarPhoenix
0102030JanMarMayJulSepNovDiamond Bar, Jan: 19 daysDiamond Bar, Feb: 17 daysDiamond Bar, Mar: 20 daysDiamond Bar, Apr: 23 daysDiamond Bar, May: 25 daysDiamond Bar, Jun: 28 daysDiamond Bar, Jul: 29 daysDiamond Bar, Aug: 30 daysDiamond Bar, Sep: 29 daysDiamond Bar, Oct: 27 daysDiamond Bar, Nov: 24 daysDiamond Bar, Dec: 21 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
Diamond Bar191720232528293029272421
Phoenix232125272929242628282524

Keep comparing

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

Diamond Bar vs another city

See the full Diamond Bar, 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).