Lake County, IL Weather Forecast for 5-Days

Updated: Thu Jan 15th 2026 5:45 PM CST

Ask About Weather

Test our newly developed Weather Chatbot. It provides up to 10 days of forecast information!
Lake County, IL Weather – 1-15 – Partly Cloudy
24° / 13°
Partly Cloudy
Highs will reach 24°F with lows near 13°F in Lake County, where overcast conditions are. Wind will be moderate, blowing around 15mph on average and gusts of 15.3mph at 11 PM. Humidity levels should be comfortable, sitting around 56% on average, the maximum being 54% at 10 PM and 45% being its lowest at 11 PM. Barometric pressure is its highest of 29.86inHg at 6 PM, a lowest point of 29.73inHg at 11 PM with an avg 29.8inHg.
Lake County, IL Weather – 1-16 – Moderate Or Heavy Snow Showers
37° / 21°

Weather Tomorrow

Moderate Or Heavy Snow Showers
Highs will reach 37°F with lows near 21°F in Lake County, where moderate Or Heavy Snow Showers are. The chance of rain is 81% with an estimated 0.31in. Snow is likely with a 16% chance with an estimated 2.3in. Wind will be moderate, blowing around 16mph on average and gusts of 20.9mph at 1 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 90% at 6 AM and 66% being its lowest at 4 PM. Barometric pressure is its highest of 29.72inHg at 11 PM, a lowest point of 29.51inHg at 7 AM with an avg 29.6inHg.
Lake County, IL Weather – 1-17 – Overcast
19° / 15°
Overcast
It will be overcast in Lake County, with a high of 19°F and a low of 15°F. Snow is likely with a 6% chance with an estimated 0in. Wind will be moderate, blowing around 17mph on average and gusts of 18.9mph at 4 PM. The humidity will be on the higher side, averaging about 67%, the maximum being 79% at 8 PM and 58% being its lowest at 1 PM. Barometric pressure is its highest of 30.18inHg at 7 PM, a lowest point of 29.77inHg at 12 AM with an avg 30.03inHg.
Lake County, IL Weather – 1-18 – Light Freezing Rain
17° /
Light Freezing Rain
Daytime highs will reach 17°F with lows dropping to 9°F in Lake County, where periods of rain are likely. Rainfall predicted to have a 71% chance with an estimated 0.02in. Snow is likely with a 14% chance with an estimated 0.1in. Wind will be moderate, blowing around 13mph on average and gusts of 15.4mph at 4 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 84% at 9 PM and 50% being its lowest at 5 PM. Barometric pressure is its highest of 30.22inHg at 3 AM, a lowest point of 29.97inHg at 11 PM with an avg 30.12inHg.
Lake County, IL Weather – 1-19 – Light Snow Showers
14° /
Light Snow Showers
Lake County may see light Snow Showers, with daytime highs of 14°F and overnight lows near 7°F. The chance of rain is 84% with an estimated 0.01in. Snow is likely with a 48% chance with an estimated 0.1in. Wind will be moderate, blowing around 16mph on average and gusts of 19.2mph at 9 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 84% at 1 AM and 51% being its lowest at 4 PM. Barometric pressure is its highest of 30.16inHg at 11 PM, a lowest point of 29.93inHg at 2 AM with an avg 30.06inHg.
Lake County, IL Weather – 1-20 – Overcast
/
Overcast
Highs will reach 6°F with lows near 4°F in Lake County, where overcast is. Snow is likely with a 19% chance with an estimated 0in. Wind will be moderate, blowing around 17mph on average and gusts of 19.6mph at 10 AM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 69% at 7 AM and 46% being its lowest at 3 PM. Barometric pressure is its highest of 30.46inHg at 10 PM, a lowest point of 30.15inHg at 1 AM with an avg 30.33inHg.

Lake County weather forecast and traffic updates by locals

Write your own Lake County, IL report, forecast, or traffic update:


Will not be posted, shared or used for marketing!

Please note by clicking on "Post" you acknowledge that you have read our Privacy Policy and Terms of Service and the Lake County, IL report and/or forecast you are posting is in compliance with such terms. If you are under 18, do not submit this form. Be respectful! Inappropriate content will be removed by a moderator.