Skip to content
VSWeather

Chantilly, VA vs Philadelphia, PA weather comparison

Chantilly

VA

Chantilly and Philadelphia have remarkably similar climates.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Chantilly, VA and Philadelphia, PA
ChantillyMetricPhiladelphia
205 daysSunny daysclear or partly cloudy skies203 days
42 inPrecipitationper year43 in
119 daysWet daysrain or snow per year120 days
21 inSnowfallper year18 in
30 daysHot daysabove 90 °F36 days
104 daysFreezing nightsat or below 32 °F76 days
69%Humidityaverage relative68%
56 °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.

ChantillyPhiladelphia

Daily highs

406080JanMarMayJulSepNovChantilly, Jan: 42 °FChantilly, Feb: 46 °FChantilly, Mar: 55 °FChantilly, Apr: 66 °FChantilly, May: 74 °FChantilly, Jun: 83 °FChantilly, Jul: 87 °FChantilly, Aug: 86 °FChantilly, Sep: 79 °FChantilly, Oct: 67 °FChantilly, Nov: 56 °FChantilly, Dec: 46 °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

4060JanMarMayJulSepNovChantilly, Jan: 25 °FChantilly, Feb: 26 °FChantilly, Mar: 33 °FChantilly, Apr: 43 °FChantilly, May: 53 °FChantilly, Jun: 62 °FChantilly, Jul: 67 °FChantilly, Aug: 65 °FChantilly, Sep: 58 °FChantilly, Oct: 45 °FChantilly, Nov: 35 °FChantilly, Dec: 29 °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
Chantilly high424655667483878679675646
Philadelphia high414453657584898680675646
Chantilly low252633435362676558453529
Philadelphia low272935455565706861504032

Monthly precipitation

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

ChantillyPhiladelphia
0.02.04.0JanMarMayJulSepNovChantilly, Jan: 3.0 inChantilly, Feb: 2.8 inChantilly, Mar: 3.8 inChantilly, Apr: 3.4 inChantilly, May: 3.8 inChantilly, Jun: 3.4 inChantilly, Jul: 3.9 inChantilly, Aug: 3.3 inChantilly, Sep: 4.3 inChantilly, Oct: 3.4 inChantilly, Nov: 3.0 inChantilly, Dec: 3.5 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
Chantilly3.02.83.83.43.83.43.93.34.33.43.03.5
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.

ChantillyPhiladelphia
01020JanMarMayJulSepNovChantilly, Jan: 16 daysChantilly, Feb: 15 daysChantilly, Mar: 16 daysChantilly, Apr: 16 daysChantilly, May: 16 daysChantilly, Jun: 17 daysChantilly, Jul: 19 daysChantilly, Aug: 19 daysChantilly, Sep: 18 daysChantilly, Oct: 20 daysChantilly, Nov: 18 daysChantilly, Dec: 16 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
Chantilly161516161617191918201816
Philadelphia161616151616181918191716

Keep comparing

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

Chantilly vs another city

See the full Chantilly, VA climate profile

More Virginia 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).