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Helena Valley Northwest, MT vs Philadelphia, PA weather comparison

Helena Valley Northwest

MT

Philadelphia has around 100 fewer freezing nights a year.

Helena Valley Northwest picks up around 15 more inches of snow each winter.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Helena Valley Northwest, MT and Philadelphia, PA
Helena Valley NorthwestMetricPhiladelphia
202 daysSunny daysclear or partly cloudy skies203 days
16 inPrecipitationper year43 in
108 daysWet daysrain or snow per year120 days
34 inSnowfallper year18 in
19 daysHot daysabove 90 °F36 days
176 daysFreezing nightsat or below 32 °F76 days
64%Humidityaverage relative68%
44 °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.

Helena Valley NorthwestPhiladelphia

Daily highs

406080JanMarMayJulSepNovHelena Valley Northwest, Jan: 32 °FHelena Valley Northwest, Feb: 36 °FHelena Valley Northwest, Mar: 46 °FHelena Valley Northwest, Apr: 55 °FHelena Valley Northwest, May: 64 °FHelena Valley Northwest, Jun: 73 °FHelena Valley Northwest, Jul: 83 °FHelena Valley Northwest, Aug: 83 °FHelena Valley Northwest, Sep: 71 °FHelena Valley Northwest, Oct: 56 °FHelena Valley Northwest, Nov: 41 °FHelena Valley Northwest, Dec: 32 °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

204060JanMarMayJulSepNovHelena Valley Northwest, Jan: 14 °FHelena Valley Northwest, Feb: 16 °FHelena Valley Northwest, Mar: 23 °FHelena Valley Northwest, Apr: 30 °FHelena Valley Northwest, May: 39 °FHelena Valley Northwest, Jun: 46 °FHelena Valley Northwest, Jul: 53 °FHelena Valley Northwest, Aug: 51 °FHelena Valley Northwest, Sep: 43 °FHelena Valley Northwest, Oct: 33 °FHelena Valley Northwest, Nov: 22 °FHelena Valley Northwest, Dec: 15 °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
Helena Valley Northwest high323646556473838371564132
Philadelphia high414453657584898680675646
Helena Valley Northwest low141623303946535143332215
Philadelphia low272935455565706861504032

Monthly precipitation

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

Helena Valley NorthwestPhiladelphia
0.02.04.0JanMarMayJulSepNovHelena Valley Northwest, Jan: 0.8 inHelena Valley Northwest, Feb: 0.8 inHelena Valley Northwest, Mar: 1.1 inHelena Valley Northwest, Apr: 1.9 inHelena Valley Northwest, May: 2.3 inHelena Valley Northwest, Jun: 2.6 inHelena Valley Northwest, Jul: 1.0 inHelena Valley Northwest, Aug: 0.9 inHelena Valley Northwest, Sep: 1.2 inHelena Valley Northwest, Oct: 1.2 inHelena Valley Northwest, Nov: 1.0 inHelena Valley Northwest, Dec: 0.9 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
Helena Valley Northwest0.80.81.11.92.32.61.00.91.21.21.00.9
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.

Helena Valley NorthwestPhiladelphia
01020JanMarMayJulSepNovHelena Valley Northwest, Jan: 12 daysHelena Valley Northwest, Feb: 12 daysHelena Valley Northwest, Mar: 14 daysHelena Valley Northwest, Apr: 13 daysHelena Valley Northwest, May: 16 daysHelena Valley Northwest, Jun: 18 daysHelena Valley Northwest, Jul: 26 daysHelena Valley Northwest, Aug: 26 daysHelena Valley Northwest, Sep: 21 daysHelena Valley Northwest, Oct: 18 daysHelena Valley Northwest, Nov: 13 daysHelena Valley Northwest, Dec: 12 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
Helena Valley Northwest121214131618262621181312
Philadelphia161616151616181918191716

Keep comparing

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

Helena Valley Northwest vs another city

See the full Helena Valley Northwest, MT climate profile

More Montana 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).