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Chicago, IL vs Helena Valley Southeast, MT weather comparison

Chicago

IL

Chicago has around 73 fewer freezing nights a year.

Helena Valley Southeast enjoys about 21 more sunny days a year than Chicago.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Chicago, IL and Helena Valley Southeast, MT
ChicagoMetricHelena Valley Southeast
180 daysSunny daysclear or partly cloudy skies201 days
39 inPrecipitationper year21 in
132 daysWet daysrain or snow per year133 days
37 inSnowfallper year40 in
16 daysHot daysabove 90 °F25 days
102 daysFreezing nightsat or below 32 °F174 days
71%Humidityaverage relative65%
52 °FAverage temperatureyear round45 °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.

ChicagoHelena Valley Southeast

Daily highs

406080JanMarMayJulSepNovChicago, 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 °FHelena Valley Southeast, Jan: 32 °FHelena Valley Southeast, Feb: 37 °FHelena Valley Southeast, Mar: 47 °FHelena Valley Southeast, Apr: 56 °FHelena Valley Southeast, May: 66 °FHelena Valley Southeast, Jun: 74 °FHelena Valley Southeast, Jul: 85 °FHelena Valley Southeast, Aug: 84 °FHelena Valley Southeast, Sep: 73 °FHelena Valley Southeast, Oct: 57 °FHelena Valley Southeast, Nov: 42 °FHelena Valley Southeast, Dec: 33 °F

Daily lows

204060JanMarMayJulSepNovChicago, 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 °FHelena Valley Southeast, Jan: 13 °FHelena Valley Southeast, Feb: 17 °FHelena Valley Southeast, Mar: 24 °FHelena Valley Southeast, Apr: 32 °FHelena Valley Southeast, May: 41 °FHelena Valley Southeast, Jun: 48 °FHelena Valley Southeast, Jul: 54 °FHelena Valley Southeast, Aug: 52 °FHelena Valley Southeast, Sep: 44 °FHelena Valley Southeast, Oct: 33 °FHelena Valley Southeast, Nov: 22 °FHelena Valley Southeast, Dec: 14 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Chicago high323646576878838175624937
Helena Valley Southeast high323747566674858473574233
Chicago low202331415161676760473625
Helena Valley Southeast low131724324148545244332214

Monthly precipitation

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

ChicagoHelena Valley Southeast
0.02.04.0JanMarMayJulSepNovChicago, 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 inHelena Valley Southeast, Jan: 0.9 inHelena Valley Southeast, Feb: 0.9 inHelena Valley Southeast, Mar: 1.4 inHelena Valley Southeast, Apr: 2.4 inHelena Valley Southeast, May: 3.2 inHelena Valley Southeast, Jun: 3.8 inHelena Valley Southeast, Jul: 1.7 inHelena Valley Southeast, Aug: 1.5 inHelena Valley Southeast, Sep: 1.6 inHelena Valley Southeast, Oct: 1.5 inHelena Valley Southeast, Nov: 1.2 inHelena Valley Southeast, Dec: 1.1 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Chicago2.42.12.84.54.44.03.63.83.03.32.82.4
Helena Valley Southeast0.90.91.42.43.23.81.71.51.61.51.21.1

Monthly sunny days

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

ChicagoHelena Valley Southeast
01020JanMarMayJulSepNovChicago, 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 daysHelena Valley Southeast, Jan: 13 daysHelena Valley Southeast, Feb: 12 daysHelena Valley Southeast, Mar: 13 daysHelena Valley Southeast, Apr: 13 daysHelena Valley Southeast, May: 15 daysHelena Valley Southeast, Jun: 18 daysHelena Valley Southeast, Jul: 26 daysHelena Valley Southeast, Aug: 26 daysHelena Valley Southeast, Sep: 21 daysHelena Valley Southeast, Oct: 18 daysHelena Valley Southeast, Nov: 14 daysHelena Valley Southeast, Dec: 12 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Chicago101114131516202020161411
Helena Valley Southeast131213131518262621181412

Keep comparing

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

Chicago vs another city

See the full Chicago, IL climate profile

More Illinois cities

Helena Valley Southeast vs another city

See the full Helena Valley Southeast, MT climate profile

More Montana 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).