2018 Long Range Weather Forecast for Collinsville, IL

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See long range weather forecasts for the next 60 days from The Old Farmer’s Almanac! Our long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities.

To see long term forecasts for the entire year, pick up a copy of the annual Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific. If your city is located inside a region, the region's forecast will apply to you.

Free 2-Month Weather Forecast

June 2018 Long Range Weather Forecast for Heartland
DatesWeather Conditions
Jun 1-4Sunny, hot
Jun 5-10Scattered t-storms, warm
Jun 11-21A couple t-storms, cool
Jun 22-30T-storms, then sunny, hot
Junetemperature 73° (1° above avg.)
precipitation 5.5" (1" above avg.)

July 2018 Long Range Weather Forecast for Heartland
DatesWeather Conditions
Jul 1-6T-storms, then sunny, hot
Jul 7-10T-storms, then sunny, cool
Jul 11-22A few t-storms, cool
Jul 23-27Sunny, cool
Jul 28-31T-storms, hot
Julytemperature 76° (1° below avg.)
precipitation 3.5" (0.5" below avg.)

Annual Weather Summary: November 2017 to October 2018

Winter will be milder than normal, with above-normal precipitation and snowfall. The coldest periods will be from late November into early December, from late December into early January, and in early February. The snowiest periods will be in mid-November, early to mid- and late December, and early February. April and May will be cooler and rainier than normal. Summer will be hotter than normal, with slightly below normal rainfall. The hottest periods will be in early and late June, early and late July, and mid-August. September and October will be warmer and rainier than normal.

Map showing Old Farmer's Almanac long range weather region number 10

About the Heartland Region

The Heartland long range weather region includes all or part of the following states: ILLINOIS (Alton, Galesburg, Moline, Quincy, Rock Island), IOWA (Cedar Rapids, Davenport, Des Moines, Sioux City, Waterloo), KANSAS (Kansas City, Olathe, Overland Park, Topeka, Wichita), MISSOURI (Columbia, Independence, Kansas City, Saint Louis, Springfield), NEBRASKA (Bellevue, Fremont, Grand Island, Lincoln, Omaha), SOUTH DAKOTA (Canton, Lennox, North Sioux City, Vermillion, Yankton), WISCONSIN (Baraboo, Fitchburg, Madison, Middleton, Monroe).

Heartland Neighboring Regions

Here are the regions that neighbor the Heartland long range weather region:

Temperature and Precipitation November 2017 to October 2018

Temperature and Precipitation Graph

Reader Comments

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It will be overcast until

It will be overcast until early evening and then it will rain.

Wedding June 16th

I am getting married outside on June 16th in Manhattan, KS. Are we going to see dry weather that day?

Weather for July 13 2018

My mom is having an outdoor pizza picnic for her 95th birthday and she is having family from all over the country. I hope you can give us good news on the predicted forcast. Thank you, Amy Thomas, Moline, IL

Weather in July

Around July 13, we are predicting a few scattered thunderstorms and cool weather. The weather can always shift forward or back a few days, of course, so don’t give up hope for a nice day yet! 

traveling Thurs. May 17 and Fri. the 18th

Should I expect good weather on the driving route between Moline, IL and Riverside, Iowa on Thurs. the 17th and Fri. the 18th?

Graduation party

We are hosting an outside graduation party in east central Iowa on May 25. What are the chances of rain? Thanks

Weekend of October 6, 2018

My daughter is having an outdoor wedding at little swan lake near Avon IL. What should we expect for weather? No plan b is possible.

Hot

It is the end of April here in Missouri and I am so so hot I am suffering . When should I expect colder weather so I don't have to run a window AC , a fan and a central cooling system in my house ??

Cooling

October

Cooler "May" Happen

Hi, Mariya: Haha… Michael above may have a good point, but meanwhile, expect for temps to get back down to where they belong this month. Thanks for asking!

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