Quad Cities, IA/IL

Weather Forecast Office

Late June/Early July 2026 Heat & Heavy Rain Summary

Overview

The tail end of June into early July 2026 brought a combination of high heat and moisture, and then numerous rounds of regional thunderstorms. Some of the highest rainfall amounts were seen just to our area's west (near Des Moines), north (southeast Minnesota), and east (Chicago metro area). Nonetheless, there were isolated amounts in excess of four inches in our area. The storms brought considerable cloud-to-ground lightning and regular wind gusts of 30-45 mph, with isolated severe winds and flash flooding.

Radar Loop from July 1st at 6 AM CDT through July 5th at 6 AM CDT

Map of all NWS Watches, Warnings, and Advisories in effect the morning of Tuesday, June 30th. The magenta depicts where Extreme Heat Warnings were in effect.

June 28th-30th Highest Temperatures & Heat Index Readings.

July 1st-5th Rainfall Totals.

Surrounding NWS Web Summaries
NWS Chicago June 30th-July 4th Heat, Severe Storms, and Significant Flash Flooding	NWS Des Moines July 2-3 and July 3-4th Flash Flooding

Warmth & Moisture
Storm Reports
Rain

Warmth & Moisture

Much of the week from June 28 through July 3 had afternoon heat index values greater than 100° for several hours. That was thanks to dew points residing frequently in the mid 70s, to at times upper 70s. As you can see by the chart to the right, those indicate a very humid to oppressive air mass.

Some nighttime low facts from the very warm stretch:

Dubuque:

The 77° observed for a low on June 30th was tied with four other dates (most recent 8/24/23) for the warmest low temperature on any day at Dubuque since 1947!
There were three straight days from June 29-July 1, where the temperature did not drop below 75°. The last time that happened in Dubuque was July 18-20, 2011, and that's the only other time this has happened since 1947!

Dew Point Infographic

Quad Cities (Moline):

There were three straight days the temperature did not drop below 76°. The last time that happened in the Quad Cities was actually last year (June 21-23, 2025), however before that was July 18-20, 2011.

Peak Heat Index Lists: June 28-30 | July 1-3

Note: the values on the maps below are taken from a combination of official and non-official airport observing sites each day and are not quality controlled. Values over 110 degrees are suspect.

Peak Heat Index June 28th

Peak Heat Index June 29th

Peak Heat Index June 30th

Peak Heat Index July 1st

Peak Heat Index July 2nd

Peak Heat Index July 3rd

Note: Below are smoothed observational grids that may not show the actual max heat index for that point

Analyzed Max Heat Index
June 28th

Analyzed Max Heat Index
June 29th

Analyzed Max Heat Index
June 30th

Analyzed Max Heat Index
July 1st

Analyzed Max Heat Index
July 2nd

Analyzed Max Heat Index
July 3rd

Storm Reports

Nationwide Summary of Storm Reports (SPC)

Interactive Map of Storm Reports (SPC)

Nationwide Summary of Storm Reports (SPC)

Interactive Map of Storm Reports (SPC)

Preliminary Local Storm Report...Summary
National Weather Service Quad Cities IA IL
656 PM CDT Mon Jul 6 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0405 PM     Tstm Wnd Dmg     3 NW Rowley             42.39N 91.89W
07/02/2026                   Buchanan           IA   Public

            Large branches down. Time estimated using
            radar.

0440 PM     Tstm Wnd Dmg     4 N Ryan                42.41N 91.48W
07/02/2026                   Delaware           IA   Public

            Small grain bin tipped over at a farm. Time
            estimated using radar.

0524 PM     Hail             2 W Farley              42.44N 91.05W
07/02/2026  M1.25 Inch       Dubuque            IA   Public



0838 PM     Rain             2 N Central City        42.24N 91.52W
07/02/2026  M2.15 Inch       Linn               IA   Trained Spotter

            Storm total accumulation through 8:30pm CDT.

0900 PM     Rain             Urbana                  42.22N 91.88W
07/02/2026  M2.61 Inch       Benton             IA   Amateur Radio

            Storm Total Rainfall. Received 0.91 inches
            in the past hour.

1022 PM     Rain             Mount Auburn            42.25N 92.09W
07/02/2026  M3.33 Inch       Benton             IA   Public



0654 AM     Rain             2 SE Manchester         42.46N 91.43W
07/03/2026  M3.58 Inch       Delaware           IA   Public



0707 AM     Rain             2 S Buck Creek          42.30N 91.34W
07/03/2026  M2.95 Inch       Delaware           IA   Public



0930 AM     Hail             Durant                  41.60N 90.91W
07/03/2026  E1.00 Inch       Cedar              IA   Trained Spotter

            40 to 45 mph winds also.

1038 AM     Tstm Wnd Dmg     Dodgeville              40.94N 91.18W
07/03/2026                   Des Moines         IA   Public

            Delayed Report...Large tree limbs up to 10
            inch in diameter were snapped. Sent via
            Facebook.

1057 AM     Tstm Wnd Dmg     4 W Milledgeville       41.96N 89.85W
07/03/2026                   Carroll            IL   Public

            Delayed Report...Tree limbs up to 6 inches
            in diameter snapped and a power pole blown
            over. Sent via Facebook. Time estimated by
            radar.

0341 PM     Rain             Mount Auburn            42.25N 92.09W
07/03/2026  M4.98 Inch       Benton             IA   Trained Spotter

            Total Rain Fall for Mount Auburn for the
            past 24 hours from July 2, 2026 3:48 pm to
            July 3, 2026 3:48 pm.

0528 PM     Hail             2 ESE Scioto Mills      42.34N 89.63W
07/03/2026  M1.00 Inch       Stephenson         IL   Public

            Estimate of golf ball size hail. Picture of
            dent to vehicle. Report was delayed.

0538 PM     Tstm Wnd Dmg     2 SE Scioto Mills       42.33N 89.64W
07/03/2026                   Stephenson         IL   Law Enforcement

            Tree fell and took down power lines.

0641 PM     Hail             Bellevue                42.26N 90.43W
07/03/2026  E1.50 Inch       Jackson            IA   Public

            Delayed report, via social media. Time
            estimated from radar.

0757 PM     Tstm Wnd Dmg     2 SE Davenport          41.53N 90.58W
07/03/2026                   Scott              IA   Law Enforcement

            Large tree downed on 12th and Main Street.
            Time estimated based on radar.

0825 PM     Flash Flood      1 ESE Davenport         41.55N 90.58W
07/03/2026                   Scott              IA   Law Enforcement

            Western Avenue closed due to water over it.
            Several other roads with water on them as
            well.

0425 AM     Tstm Wnd Gst     2 ESE Homestead         41.76N 91.83W
07/04/2026  M58 MPH          Iowa               IA   Mesonet



0700 AM     Rain             2 W Bettendorf          41.57N 90.51W
07/04/2026  M2.87 Inch       Scott              IA   Trained Spotter

            Overnight rain total.

0804 AM     Rain             Le Claire               41.60N 90.36W
07/04/2026  M3.60 Inch       Scott              IA   Trained Spotter

            For the last 24 hours.

0930 AM     Rain             2 W Genoa Bluff         41.72N 92.18W
07/04/2026  M2.40 Inch       Iowa               IA   Trained Spotter

            Overnight total.

0244 PM     Rain             1 N Van Orin            41.57N 89.35W
07/04/2026  M4.80 Inch       Bureau             IL   Trained Spotter

            24 hour total.

0258 PM     Flash Flood      Spring Valley           41.33N 89.20W
07/04/2026                   Bureau             IL   Emergency Mngr

            Multiple roads in Spring Valley closed due
            to water.

0300 PM     Flash Flood      1 WSW Depue             41.32N 89.31W
07/04/2026                   Bureau             IL   Emergency Mngr

            Several roads closed due to high water in
            town.

Heavy Rain

For rainfall totals from Thursday, July 2nd alone, see this graphic.

Public Information Statement
National Weather Service Quad Cities IA IL
633 PM CDT Mon Jul 6 2026

...JULY 1-5 OBSERVED RAINFALL REPORTS...

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.


Location                     Amount    Time/Date       Provider
---------------------------------------------------------------

...Illinois...

...Bureau County...
Spring Valley                4.01 in   0535 PM 07/06   AWS
Princeton 1.0 SSW            3.79 in   0700 AM 07/06   COCORAHS

...Henry County...
Galva 2.7 NE                 2.57 in   0600 AM 07/06   COCORAHS
2 SSE Osborn                 2.32 in   0532 PM 07/06   CWOP
Colona 0.5 ESE               2.12 in   0700 AM 07/06   COCORAHS

...Jo Daviess County...
Stockton 3.4 NNE             2.44 in   0700 AM 07/06   COCORAHS
Stockton 3 Nne               2.41 in   0700 AM 07/06   COOP
Stockton                     2.29 in   0530 PM 07/06   CWOP

...Rock Island County...
Silvis                       2.06 in   0536 PM 07/06   CWOP
Quad Cities Intl Airport     0.79 in   1200 AM 07/06   ASOS

...Whiteside County...
Sterling                     2.32 in   0540 PM 07/06   CWOP
Morrison 3.2 E               2.09 in   0700 AM 07/06   COCORAHS


...Iowa...

...Benton County...
Mount Auburn 0.1 SSW         4.59 in   0700 AM 07/06   COCORAHS
Mount Auburn 2.2 NNW         4.44 in   0600 AM 07/06   COCORAHS
Urbana                       3.45 in   0530 PM 07/06   CWOP
2 ENE Dysart                 3.10 in   0530 PM 07/06   AWS
Vinton Arpt                  2.28 in   0535 PM 07/06   AWOS

...Buchanan County...
Independence 0.9 WNW         4.35 in   0700 AM 07/06   COCORAHS
Independence Arpt            3.79 in   0535 PM 07/06   AWOS
Winthrop 5.6 NNE             3.64 in   0900 AM 07/06   COCORAHS
Winthrop                     2.85 in   0530 PM 07/06   CWOP

...Clinton County...
Camanche 1.2 W               2.07 in   0700 AM 07/06   COCORAHS

...Delaware County...
Earlville 1.3 WNW            3.63 in   0800 AM 07/06   COCORAHS
Manchester                   3.39 in   0700 AM 07/06   COOP
2 NNW Manchester Airport     3.29 in   0530 PM 07/06   AWS
1 NE Dundee                  2.86 in   0700 AM 07/06   COCORAHS

...Dubuque County...
Bellevue 12.2 NW             1.94 in   0800 AM 07/06   COCORAHS
Dubuque Arpt                 1.71 in   0453 PM 07/06   ASOS

...Iowa County...
Marengo 2.6 SSW              2.29 in   0600 AM 07/06   COCORAHS
Amana                        2.10 in   0535 PM 07/06   CWOP

...Jackson County...
Bellevue 0.3 SSW             2.18 in   0700 AM 07/06   COCORAHS

...Johnson County...
Riverside                    2.03 in   0534 PM 07/06   CWOP
Iowa City                    1.80 in   0700 AM 07/06   COOP
Iowa City Airport            1.53 in   0700 AM 07/06   ASOS

...Jones County...
Livermore                    2.65 in   0530 PM 07/06   CWOP
Anamosa 0.6 ESE              1.97 in   0840 AM 07/06   COCORAHS
Anamosa 3 SSW                1.86 in   0600 AM 07/06   COOP

...Linn County...
Central City                 3.10 in   0535 PM 07/06   CWOP
Center Point                 3.04 in   0800 AM 07/06   COCORAHS
Center Point 0.6 NNW         2.89 in   0600 AM 07/06   COCORAHS

...Scott County...
Eldridge 0.7 SSW             3.57 in   0800 AM 07/06   COCORAHS
Davenport 4.3 NE             3.50 in   0700 AM 07/06   COCORAHS
NWS Quad Cities              3.02 in.  1200 AM 07/06   NWS
1 NE Pleasant Valley         3.02 in   0700 AM 07/06   COCORAHS
3 S Mount Joy                2.55 in   0530 PM 07/06   AWS
Flagstaff Cheshire           2.38 in   0530 PM 07/06   CWOP

...Washington County...
Wellman 4.0 E                2.07 in   0700 AM 07/06   COCORAHS

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