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Black Diamond, WA vs Philadelphia, PA weather comparison

Black Diamond

WA

Philadelphia endures about 32 more days above 90 °F each year.

Philadelphia enjoys about 60 more sunny days a year than Black Diamond. Philadelphia sees rain or snow on roughly 47 fewer days each year.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Black Diamond, WA and Philadelphia, PA
Black DiamondMetricPhiladelphia
142 daysSunny daysclear or partly cloudy skies203 days
63 inPrecipitationper year43 in
166 daysWet daysrain or snow per year120 days
24 inSnowfallper year18 in
4 daysHot daysabove 90 °F36 days
63 daysFreezing nightsat or below 32 °F76 days
79%Humidityaverage relative68%
51 °FAverage temperatureyear round57 °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.

Black DiamondPhiladelphia

Daily highs

406080JanMarMayJulSepNovBlack Diamond, Jan: 46 °FBlack Diamond, Feb: 49 °FBlack Diamond, Mar: 53 °FBlack Diamond, Apr: 58 °FBlack Diamond, May: 65 °FBlack Diamond, Jun: 69 °FBlack Diamond, Jul: 76 °FBlack Diamond, Aug: 77 °FBlack Diamond, Sep: 71 °FBlack Diamond, Oct: 59 °FBlack Diamond, Nov: 50 °FBlack Diamond, Dec: 44 °FPhiladelphia, Jan: 41 °FPhiladelphia, Feb: 44 °FPhiladelphia, Mar: 53 °FPhiladelphia, Apr: 65 °FPhiladelphia, May: 75 °FPhiladelphia, Jun: 84 °FPhiladelphia, Jul: 89 °FPhiladelphia, Aug: 86 °FPhiladelphia, Sep: 80 °FPhiladelphia, Oct: 67 °FPhiladelphia, Nov: 56 °FPhiladelphia, Dec: 46 °F

Daily lows

4060JanMarMayJulSepNovBlack Diamond, Jan: 33 °FBlack Diamond, Feb: 33 °FBlack Diamond, Mar: 35 °FBlack Diamond, Apr: 39 °FBlack Diamond, May: 44 °FBlack Diamond, Jun: 48 °FBlack Diamond, Jul: 52 °FBlack Diamond, Aug: 52 °FBlack Diamond, Sep: 48 °FBlack Diamond, Oct: 42 °FBlack Diamond, Nov: 37 °FBlack Diamond, Dec: 33 °FPhiladelphia, Jan: 27 °FPhiladelphia, Feb: 29 °FPhiladelphia, Mar: 35 °FPhiladelphia, Apr: 45 °FPhiladelphia, May: 55 °FPhiladelphia, Jun: 65 °FPhiladelphia, Jul: 70 °FPhiladelphia, Aug: 68 °FPhiladelphia, Sep: 61 °FPhiladelphia, Oct: 50 °FPhiladelphia, Nov: 40 °FPhiladelphia, Dec: 32 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Black Diamond high464953586569767771595044
Philadelphia high414453657584898680675646
Black Diamond low333335394448525248423733
Philadelphia low272935455565706861504032

Monthly precipitation

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

Black DiamondPhiladelphia
0.02.55.07.5JanMarMayJulSepNovBlack Diamond, Jan: 8.7 inBlack Diamond, Feb: 6.2 inBlack Diamond, Mar: 6.8 inBlack Diamond, Apr: 5.4 inBlack Diamond, May: 3.8 inBlack Diamond, Jun: 2.9 inBlack Diamond, Jul: 1.1 inBlack Diamond, Aug: 1.3 inBlack Diamond, Sep: 3.1 inBlack Diamond, Oct: 6.3 inBlack Diamond, Nov: 9.2 inBlack Diamond, Dec: 8.7 inPhiladelphia, Jan: 3.2 inPhiladelphia, Feb: 3.0 inPhiladelphia, Mar: 4.1 inPhiladelphia, Apr: 3.6 inPhiladelphia, May: 3.5 inPhiladelphia, Jun: 3.8 inPhiladelphia, Jul: 3.9 inPhiladelphia, Aug: 3.7 inPhiladelphia, Sep: 4.1 inPhiladelphia, Oct: 3.6 inPhiladelphia, Nov: 2.9 inPhiladelphia, Dec: 4.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Black Diamond8.76.26.85.43.82.91.11.33.16.39.28.7
Philadelphia3.23.04.13.63.53.83.93.74.13.62.94.0

Monthly sunny days

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

Black DiamondPhiladelphia
01020JanMarMayJulSepNovBlack Diamond, Jan: 7 daysBlack Diamond, Feb: 9 daysBlack Diamond, Mar: 8 daysBlack Diamond, Apr: 9 daysBlack Diamond, May: 11 daysBlack Diamond, Jun: 12 daysBlack Diamond, Jul: 20 daysBlack Diamond, Aug: 22 daysBlack Diamond, Sep: 18 daysBlack Diamond, Oct: 12 daysBlack Diamond, Nov: 7 daysBlack Diamond, Dec: 7 daysPhiladelphia, Jan: 16 daysPhiladelphia, Feb: 16 daysPhiladelphia, Mar: 16 daysPhiladelphia, Apr: 15 daysPhiladelphia, May: 16 daysPhiladelphia, Jun: 16 daysPhiladelphia, Jul: 18 daysPhiladelphia, Aug: 19 daysPhiladelphia, Sep: 18 daysPhiladelphia, Oct: 19 daysPhiladelphia, Nov: 17 daysPhiladelphia, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Black Diamond798911122022181277
Philadelphia161616151616181918191716

Keep comparing

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

Black Diamond vs another city

See the full Black Diamond, WA climate profile

More Washington cities

Philadelphia vs another city

See the full Philadelphia, PA climate profile

More Pennsylvania 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).