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Diamond Bar, CA vs West Covina, CA weather comparison

Diamond Bar

CA

Diamond Bar and West Covina have remarkably similar climates.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Diamond Bar, CA and West Covina, CA
Diamond BarMetricWest Covina
290 daysSunny daysclear or partly cloudy skies291 days
16 inPrecipitationper year18 in
38 daysWet daysrain or snow per year36 days
0 inSnowfallper year0 in
70 daysHot daysabove 90 °F62 days
3 daysFreezing nightsat or below 32 °F1 days
63%Humidityaverage relative60%
66 °FAverage temperatureyear round66 °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 BarWest Covina

Daily highs

708090JanMarMayJulSepNovDiamond 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 °FWest Covina, Jan: 68 °FWest Covina, Feb: 68 °FWest Covina, Mar: 71 °FWest Covina, Apr: 75 °FWest Covina, May: 77 °FWest Covina, Jun: 82 °FWest Covina, Jul: 88 °FWest Covina, Aug: 90 °FWest Covina, Sep: 87 °FWest Covina, Oct: 81 °FWest Covina, Nov: 74 °FWest Covina, Dec: 67 °F

Daily lows

5060JanMarMayJulSepNovDiamond 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 °FWest Covina, Jan: 45 °FWest Covina, Feb: 46 °FWest Covina, Mar: 49 °FWest Covina, Apr: 51 °FWest Covina, May: 56 °FWest Covina, Jun: 60 °FWest Covina, Jul: 64 °FWest Covina, Aug: 64 °FWest Covina, Sep: 62 °FWest Covina, Oct: 56 °FWest Covina, Nov: 49 °FWest Covina, Dec: 44 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Diamond Bar high696973767984909289827568
West Covina high686871757782889087817467
Diamond Bar low444548515558636461554843
West Covina low454649515660646462564944

Monthly precipitation

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

Diamond BarWest Covina
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 inWest Covina, Jan: 4.2 inWest Covina, Feb: 4.5 inWest Covina, Mar: 2.8 inWest Covina, Apr: 1.1 inWest Covina, May: 0.5 inWest Covina, Jun: 0.1 inWest Covina, Jul: 0.1 inWest Covina, Aug: 0.0 inWest Covina, Sep: 0.2 inWest Covina, Oct: 0.8 inWest Covina, Nov: 1.1 inWest Covina, Dec: 2.8 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
West Covina4.24.52.81.10.50.10.10.00.20.81.12.8

Monthly sunny days

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

Diamond BarWest Covina
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 daysWest Covina, Jan: 19 daysWest Covina, Feb: 18 daysWest Covina, Mar: 21 daysWest Covina, Apr: 23 daysWest Covina, May: 24 daysWest Covina, Jun: 27 daysWest Covina, Jul: 29 daysWest Covina, Aug: 30 daysWest Covina, Sep: 28 daysWest Covina, Oct: 27 daysWest Covina, Nov: 24 daysWest Covina, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Diamond Bar191720232528293029272421
West Covina191821232427293028272421

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

West Covina vs another city

See the full West Covina, 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).