Hail history for Delavan, Wisconsin
NOAA hail reports in and within about 5 km (3 miles) of Delavan since 1977, with preliminary reports to November 3, 2026.
Readout · Delavan
- Last hail
- Sep 7, 2021
- 1.50 in, ping pong ball size
- Hail days, last 5 years
- 0
- since Nov 3, 2021 · 0 reports
- Largest ever
- 2.50 in
- tennis ball · Jul 20, 1980
13 reports on 11 days since 1977 · #164 of 271 Wisconsin places
Hail map · Delavan
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Delavan is from September 7, 2021. A local roofer can check and document it at no cost.
Phone line opening soon
What the record says about Delavan
The latest hail report in and around Delavan is from September 7, 2021, 1.50 in (ping pong ball size). There has been no hail report here in the five years since November 3, 2021.
Over the 20 years 2006–2025, Delavan logged 7 reports on 5 hail days, about 0.3 reports a year. That is 22% less than the median Wisconsin town on this site (0.5 a year) and ranks #164 of 271 Wisconsin cities and towns on this site for all-time reports. Delavan accounts for 9% of the 139 reports filed in Walworth County.
8% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Wisconsin town on this site. The largest hail on record here is 2.50 in (tennis ball) on July 20, 1980.
The busiest year was 2021, with 2 reports on 1 day. Hail here peaks in September (46% of reports); 15% fall between April and June.
Reports a year 2006–2025 average
- Delavan 0.3
- Walworth County 4.1
- Median Wisconsin town on this site 0.5
Hail days 2006–2025
- Delavan 5
- Walworth County 38
- Median Wisconsin town on this site 7
Share 2 in or larger of sized reports
- Delavan 8%
- Walworth County 4%
- Median Wisconsin town on this site 6%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 2 | 2 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jul 20, 1980 | 2.50 intennis ball | — | Walworth | 18:15 local · NCEI |
| Oct 23, 2001 | 1.75 ingolf ball | 5 NNE Darien | Walworth | 22:05 local · NCEI |
| Sep 4, 1979 | 1.75 ingolf ball | — | Walworth | 16:30 local · NCEI |
| Sep 4, 1977 | 1.75 ingolf ball | — | Walworth | 16:00 local · NCEI |
| Sep 7, 2021 | 1.50 inping pong ball | 0.69 N Delavan | Walworth | 11:33 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 4 31%
- 1–2 in 8 62%
- 2 in + 1 8%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Sep 7, 2021 | 1.50 inping pong ball | 0.69 N Delavan | Walworth | 11:33 local · NCEI |
| Sep 7, 2021 | 1.00 inquarter | Delavan | Walworth | 11:32 local · NCEI |
| May 12, 2014 | 1.00 inquarter | 0.51 W Delavan Arpt | Walworth | 15:18 local · NCEI |
| Aug 30, 2013 | 1.00 inquarter | Delavan | Walworth | 15:45 local · NCEI |
| Aug 30, 2013 | 1.50 inping pong ball | Delavan | Walworth | 15:40 local · NCEI |
| Sep 21, 2010 | 0.88 innickel | 2 WSW Delavan Lake | Walworth | 15:58 local · NCEI |
| May 17, 2006 | 0.75 inpenny | 3 N Darien | Walworth | 15:26 local · NCEI |
| Jul 6, 2003 | 0.75 inpenny | Delavan | Walworth | 14:05 local · NCEI |
| Oct 23, 2001 | 1.75 ingolf ball | 5 NNE Darien | Walworth | 22:05 local · NCEI |
| Sep 6, 1998 | 0.75 inpenny | Delavan | Walworth | 22:45 local · NCEI |
| Jul 20, 1980 | 2.50 intennis ball | — | Walworth | 18:15 local · NCEI |
| Sep 4, 1979 | 1.75 ingolf ball | — | Walworth | 16:30 local · NCEI |
Hail history near Delavan
- Elkhorn 9 km · 10
- Lake Geneva 17 km · 10
- Bloomfield 24 km · 20
- Whitewater 25 km · 17
- East Troy 26 km · 14
- Palmyra 28 km · 11
- Burlington 30 km · 14
- Milton 30 km · 13
Questions about hail in Delavan
How often does it hail in Delavan, Wisconsin?
13 hail reports have been logged in and within about 5 km (3 miles) of Delavan since 1977. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #164 of 271 Wisconsin places by number of reports.
When is hail season in Delavan?
Most reports come in September, May, July. September alone accounts for 46% of all reports.
What is the largest hail recorded in Delavan?
2.50 in (tennis ball size) on July 20, 1980. 8% of reports here were 2 inches or larger.
When did it last hail in Delavan?
The most recent report in this data is from September 7, 2021 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Delavan had in the last five years?
None: there has been no hail report in and within about 5 km (3 miles) of Delavan since November 3, 2021. The last one was on September 7, 2021.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.