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Casper, WY vs Chicago, IL weather comparison

Casper

WY

Casper picks up around 45 more inches of snow each winter.

Casper enjoys about 76 more sunny days a year than Chicago. Chicago has around 58 fewer freezing nights a year.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Casper, WY and Chicago, IL
CasperMetricChicago
256 daysSunny daysclear or partly cloudy skies180 days
16 inPrecipitationper year39 in
96 daysWet daysrain or snow per year132 days
83 inSnowfallper year37 in
32 daysHot daysabove 90 °F16 days
160 daysFreezing nightsat or below 32 °F102 days
57%Humidityaverage relative71%
47 °FAverage temperatureyear round52 °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.

CasperChicago

Daily highs

406080JanMarMayJulSepNovCasper, 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 °FChicago, Jan: 32 °FChicago, Feb: 36 °FChicago, Mar: 46 °FChicago, Apr: 57 °FChicago, May: 68 °FChicago, Jun: 78 °FChicago, Jul: 83 °FChicago, Aug: 81 °FChicago, Sep: 75 °FChicago, Oct: 62 °FChicago, Nov: 49 °FChicago, Dec: 37 °F

Daily lows

204060JanMarMayJulSepNovCasper, 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 °FChicago, Jan: 20 °FChicago, Feb: 23 °FChicago, Mar: 31 °FChicago, Apr: 41 °FChicago, May: 51 °FChicago, Jun: 61 °FChicago, Jul: 67 °FChicago, Aug: 67 °FChicago, Sep: 60 °FChicago, Oct: 47 °FChicago, Nov: 36 °FChicago, Dec: 25 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Casper high383949566679888676604837
Chicago high323646576878838175624937
Casper low161725314050575544342517
Chicago low202331415161676760473625

Monthly precipitation

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

CasperChicago
0.02.04.0JanMarMayJulSepNovCasper, 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 inChicago, Jan: 2.4 inChicago, Feb: 2.1 inChicago, Mar: 2.8 inChicago, Apr: 4.5 inChicago, May: 4.4 inChicago, Jun: 4.0 inChicago, Jul: 3.6 inChicago, Aug: 3.8 inChicago, Sep: 3.0 inChicago, Oct: 3.3 inChicago, Nov: 2.8 inChicago, Dec: 2.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Casper0.81.01.52.32.71.40.70.61.11.81.10.9
Chicago2.42.12.84.54.44.03.63.83.03.32.82.4

Monthly sunny days

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

CasperChicago
01020JanMarMayJulSepNovCasper, 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 daysChicago, Jan: 10 daysChicago, Feb: 11 daysChicago, Mar: 14 daysChicago, Apr: 13 daysChicago, May: 15 daysChicago, Jun: 16 daysChicago, Jul: 20 daysChicago, Aug: 20 daysChicago, Sep: 20 daysChicago, Oct: 16 daysChicago, Nov: 14 daysChicago, Dec: 11 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Casper201819171824272625222121
Chicago101114131516202020161411

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

Chicago vs another city

See the full Chicago, IL climate profile

More Illinois 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).