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Casper, WY vs Phoenix, AZ weather comparison

Casper

WY

Casper picks up around 83 more inches of snow each winter.

Phoenix has around 158 fewer freezing nights a year. Phoenix endures about 131 more days above 90 °F each year.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Casper, WY and Phoenix, AZ
CasperMetricPhoenix
256 daysSunny daysclear or partly cloudy skies307 days
16 inPrecipitationper year7 in
96 daysWet daysrain or snow per year33 days
83 inSnowfallper year0 in
32 daysHot daysabove 90 °F163 days
160 daysFreezing nightsat or below 32 °F2 days
57%Humidityaverage relative35%
47 °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.

CasperPhoenix

Daily highs

406080100JanMarMayJulSepNovCasper, Jan: 38 °FCasper, Feb: 39 °FCasper, Mar: 49 °FCasper, Apr: 56 °FCasper, May: 66 °FCasper, Jun: 79 °FCasper, Jul: 88 °FCasper, Aug: 86 °FCasper, Sep: 76 °FCasper, Oct: 60 °FCasper, Nov: 48 °FCasper, Dec: 37 °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

20406080JanMarMayJulSepNovCasper, Jan: 16 °FCasper, Feb: 17 °FCasper, Mar: 25 °FCasper, Apr: 31 °FCasper, May: 40 °FCasper, Jun: 50 °FCasper, Jul: 57 °FCasper, Aug: 55 °FCasper, Sep: 44 °FCasper, Oct: 34 °FCasper, Nov: 25 °FCasper, Dec: 17 °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
Casper high383949566679888676604837
Phoenix high666976839210210510398877565
Casper low161725314050575544342517
Phoenix low444752586775828276645143

Monthly precipitation

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

CasperPhoenix
0.01.02.0JanMarMayJulSepNovCasper, Jan: 0.8 inCasper, Feb: 1.0 inCasper, Mar: 1.5 inCasper, Apr: 2.3 inCasper, May: 2.7 inCasper, Jun: 1.4 inCasper, Jul: 0.7 inCasper, Aug: 0.6 inCasper, Sep: 1.1 inCasper, Oct: 1.8 inCasper, Nov: 1.1 inCasper, Dec: 0.9 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
Casper0.81.01.52.32.71.40.70.61.11.81.10.9
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.

CasperPhoenix
0102030JanMarMayJulSepNovCasper, Jan: 20 daysCasper, Feb: 18 daysCasper, Mar: 19 daysCasper, Apr: 17 daysCasper, May: 18 daysCasper, Jun: 24 daysCasper, Jul: 27 daysCasper, Aug: 26 daysCasper, Sep: 25 daysCasper, Oct: 22 daysCasper, Nov: 21 daysCasper, 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
Casper201819171824272625222121
Phoenix232125272929242628282524

Keep comparing

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

Casper vs another city

See the full Casper, WY climate profile

More Wyoming 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).