Illinois long range weather forecast

Local time: 04:30

The long-range forecast for Illinois reveals lower temperatures than usual for this time of the year, dipping to 15°. In the coming days, the forecasted temperatures are expected to be on average -3.8 °C lower than the average of the last few years.

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Select a month and click on a day for more information:

°C °F

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Illinois 30 days weather forecast

Check out our estimated 30 days weather forecast for Illinois, this data is based on the average weather in Illinois in the last few years.

For a more accurate and detailed forecast, check out the 14 day weather for Illinois next to the desired date.

Sun	Mon	Tue	Wed	Thu	Fri	Sat
				1 15° /13°	2 18° /14°	3 21° /14°
4 20° /15°	5 21° /14°	6 21° /14°	7 17° /12°	8 18° /12°	9 19° /12°	10 20° /13°
11 20° /13°	12 18° /11°	13 16° /12°	14 15° /11°	15 13° /10°	16 14° /8°	17 15° /7°
18 16° /7°	19 15° /8°	20 16° /8°	21 17° /10°	22 15° /9°	23 16° /9°	24 15° /9°
25 13° /9°	26 13° /9°	27 14° /8°	28 12° /7°	29 12° /9°	30 11° /7°	31 11° /6°

Illinois long range weather forecast - FAQ

Do you provide 30 days weather forecast for Illinois?

You can see the next 30 weather forecast for Illinois at the top of the page, the next 14 days (from today) are more accurate, while the other is based on average of previous years.

Can I see the weather forecast for a particular date in Illinois?

Sure, you can select the date from the calendar above to view the forecast in Illinois on that date.

How accurate is the long-range weather forecast for Illinois?

Our long-range weather forecast for Illinois is provided by using statistics from previous years. Although we cannot predict the weather months in advance, we can see an average.

Can I see a long-range weather forecast for different countries?

Yes, we provide a 14 day weather forecast and a long-range weather forecast for different countries and cities. You can search for a location in the search box at the top of the page.