Skip to content
VSWeather

Pontoon Beach, IL weather and climate

Madison County, IL · population 6,131 · about 410 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Pontoon Beach's own coordinates.

The year at a glance

Sunny days
201
clear or partly cloudy, per year
Precipitation
43 in
per year
Wet days
119
rain or snow per year
Snowfall
12 in
per year
Hot days
37
above 90 °F
Freezing nights
95
at or below 32 °F
Humidity
67%
average relative
Average temperature
56 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 40 °FDaily high, Feb: 45 °FDaily high, Mar: 55 °FDaily high, Apr: 67 °FDaily high, May: 76 °FDaily high, Jun: 85 °FDaily high, Jul: 88 °FDaily high, Aug: 87 °FDaily high, Sep: 80 °FDaily high, Oct: 69 °FDaily high, Nov: 55 °FDaily high, Dec: 44 °FDaily low, Jan: 23 °FDaily low, Feb: 26 °FDaily low, Mar: 35 °FDaily low, Apr: 45 °FDaily low, May: 56 °FDaily low, Jun: 65 °FDaily low, Jul: 69 °FDaily low, Aug: 67 °FDaily low, Sep: 59 °FDaily low, Oct: 47 °FDaily low, Nov: 36 °FDaily low, Dec: 28 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high404555677685888780695544
Daily low232635455665696759473628

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovPontoon Beach, Jan: 2.9 inPontoon Beach, Feb: 2.5 inPontoon Beach, Mar: 3.7 inPontoon Beach, Apr: 4.7 inPontoon Beach, May: 5.2 inPontoon Beach, Jun: 4.2 inPontoon Beach, Jul: 3.3 inPontoon Beach, Aug: 3.0 inPontoon Beach, Sep: 3.2 inPontoon Beach, Oct: 3.5 inPontoon Beach, Nov: 3.7 inPontoon Beach, Dec: 2.6 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Pontoon Beach2.92.53.74.75.24.23.33.03.23.53.72.6

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovPontoon Beach, Jan: 14 daysPontoon Beach, Feb: 12 daysPontoon Beach, Mar: 15 daysPontoon Beach, Apr: 15 daysPontoon Beach, May: 16 daysPontoon Beach, Jun: 17 daysPontoon Beach, Jul: 21 daysPontoon Beach, Aug: 22 daysPontoon Beach, Sep: 21 daysPontoon Beach, Oct: 20 daysPontoon Beach, Nov: 16 daysPontoon Beach, Dec: 14 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Pontoon Beach141215151617212221201614

Compare Pontoon Beach with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Illinois city

About this data

Figures are 30 year averages for 1991-2020. 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).