Jo Daviess County, IL Weather Forecast for 5-Days

Updated: Mon May 18th 2026 8:00 PM CDT

Ask About Weather

Test our newly developed Weather Chatbot. It provides up to 10 days of forecast information!
Jo Daviess County, IL Weather – 5-18 – Moderate Rain
84° / 64°
Moderate Rain
Daytime highs will reach 84°F with lows dropping to 64°F in Jo Daviess County, where it will rain at times. The chance of rain is 88% with an estimated 0.44in. Wind will be moderate, blowing around 20mph on average and gusts of 30.8mph at 10 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 76% at 11 PM and 70% being its lowest at 9 PM. Barometric pressure is its highest of 29.77inHg at 11 PM, a lowest point of 29.75inHg at 9 PM with an avg 29.76inHg.
Jo Daviess County, IL Weather – 5-19 – Moderate Rain
65° / 46°

Weather Tomorrow

Moderate Rain
Jo Daviess County may see rain, with daytime highs of 65°F and overnight lows near 46°F. The chance of rain is 91% with an estimated 0.34in. Wind will be moderate, blowing around 17mph on average and gusts of 32.1mph at 12 AM. High humidity with average of 85% is anticipated, the maximum being 96% at 6 AM and 71% being its lowest at 5 PM. Barometric pressure is its highest of 30.19inHg at 11 PM, a lowest point of 29.79inHg at 12 AM with an avg 29.96inHg.
Jo Daviess County, IL Weather – 5-20 – Sunny
59° / 38°
Sunny
Bright and sunny conditions in Jo Daviess County, with a high of 59°F and a low of 38°F. Wind will be moderate, blowing around 12mph on average and gusts of 18.9mph at 10 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 87% at 6 AM and 59% being its lowest at 1 PM. Barometric pressure is its highest of 30.35inHg at 8 AM, a lowest point of 30.24inHg at 12 AM with an avg 30.3inHg.
Jo Daviess County, IL Weather – 5-21 – Scattered Showers
65° / 40°
Scattered Showers
Daytime highs will reach 65°F with lows dropping to 40°F in Jo Daviess County, where on and off showers are set to occur. Rainfall predicted to have a 72% chance with an estimated 0.03in. Wind will be moderate, blowing around 16mph on average and gusts of 26.8mph at 9 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 81% at 1 AM and 60% being its lowest at 2 PM. Barometric pressure is its highest of 30.33inHg at 3 AM, a lowest point of 30.15inHg at 5 PM with an avg 30.25inHg.
Jo Daviess County, IL Weather – 5-22 – Scattered Showers
63° / 48°
Scattered Showers
Passing showers are in the forecast for Jo Daviess County, with a high of 63°F and a low of 48°F. The chance of rain is 87% with an estimated 0.01in. Wind will be moderate, blowing around 14mph on average and gusts of 22.8mph at 9 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 81% at 12 AM and 61% being its lowest at 1 PM. Barometric pressure is its highest of 30.18inHg at 12 AM, a lowest point of 30.03inHg at 5 PM with an avg 30.1inHg.
Jo Daviess County, IL Weather – 5-23 – Overcast
68° / 52°
Overcast
Daytime highs will reach 68°F with lows dropping to 52°F in Jo Daviess County, where skies will be overcast. Wind will be moderate, blowing around 11mph on average and gusts of 17.9mph at 12 AM. High humidity with average of 84% is anticipated, the maximum being 92% at 11 PM and 77% being its lowest at 12 AM. Barometric pressure is its highest of 30.04inHg at 12 PM, a lowest point of 29.99inHg at 6 PM with an avg 30.02inHg.

Currently

Patchy Rain Nearby 75°F
29.84 inHg.
Barometer
68%
Humidity
S 20.5 mph
Wind
Patchy Rain Nearby

5 Day Forecast Nearby

More Local Information

Bookmark and Share

Get the LocalConditions.com App on Google Play
Sign up for a membership to go Ad free

Jo Daviess County weather forecast and traffic updates by locals

Write your own Jo Daviess 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 Jo Daviess 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.