Hail History

Hail history for Fort Atkinson, Wisconsin

NOAA hail reports in and within about 5 km (3 miles) of Fort Atkinson since 2000, with preliminary reports to November 3, 2026.

Readout · Fort Atkinson

Last hail
Apr 18, 2025
2.00 in, hen egg size
Hail days, last 5 years
3
since Nov 3, 2021 · 6 reports
Largest ever
2.00 in
hen egg · Apr 18, 2025

20 reports on 14 days since 2000 · #71 of 271 Wisconsin places

Hail map · Fort Atkinson

Fort Atkinson Jefferson Lake Koshkonong Whitewater Lake Mills Johnson Creek Edgerton Palmyra 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
20 most recent reports with a location; Jefferson County is shaded. Open street map

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What the record says about Fort Atkinson

The latest hail report in and around Fort Atkinson is from April 18, 2025, 2.00 in (hen egg size). Since November 3, 2021 there have been 3 separate hail days; the biggest stones in that time were 2.00 in on April 18, 2025.

Over the 20 years 2006–2025, Fort Atkinson logged 15 reports on 10 hail days, about 0.8 reports a year. That is 67% more than the median Wisconsin town on this site (0.5 a year) and ranks #71 of 271 Wisconsin cities and towns on this site for all-time reports. Fort Atkinson accounts for 11% of the 177 reports filed in Jefferson County.

5% 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 2.00 in (hen egg) on April 18, 2025 near 2.14 WNW Cold Spg.

Reports held about level in 2016–2025 (7) compared with 2006–2015 (8). The busiest year was 2025, with 3 reports on 1 day. Hail here peaks in June (35% of reports); 70% fall between April and June.

Reports a year 2006–2025 average

  • Fort Atkinson 0.8
  • Jefferson County 5.0
  • Median Wisconsin town on this site 0.5

Hail days 2006–2025

  • Fort Atkinson 10
  • Jefferson County 46
  • Median Wisconsin town on this site 7

Share 2 in or larger of sized reports

  • Fort Atkinson 5%
  • Jefferson County 10%
  • Median Wisconsin town on this site 6%

Hail over time

0123 2000: 1 reports, largest 0.88 in 2000 2003: 1 reports, largest 0.75 in 2004: 2 reports, largest 1.75 in 2005: 1 reports, largest 1.00 in 2005 2006: 2 reports, largest 0.75 in 2008: 1 reports, largest 0.88 in 2010: 2 reports, largest 1.50 in 2010 2012: 1 reports, largest 1.75 in 2014: 2 reports, largest 1.75 in 2015 2020 2021: 1 reports, largest 0.88 in 2023: 3 reports, largest 1.00 in 2025: 3 reports, largest 2.00 in 2025
Reports per year, 2000–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
02468 Jan Feb Mar April: 4 reports (20%) Apr May: 3 reports (15%) May June: 7 reports (35%) Jun Jul August: 5 reports (25%) Aug Sep October: 1 reports (5%) Oct Nov Dec
All 20 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 3 3
2024 0
2023 12 3
2022 0
2021 1 1
2020 0
2019 0
2018 0
2017 0

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Apr 18, 2025 3 2.00 in —
Aug 24, 2023 2 1.00 in —
Apr 4, 2023 1 1.00 in —

Largest hail on record

Largest hail reports in Fort Atkinson
Date Size Location County Damage Time · source
Apr 18, 2025 2.00 inhen egg 2.14 WNW Cold Spg Jefferson — 06:26 local · NCEI
May 12, 2014 1.75 ingolf ball 0.92 E Ft Atkinson Jefferson — 15:35 local · NCEI
May 1, 2012 1.75 ingolf ball 1 NE Ft Atkinson Jefferson — 15:27 local · NCEI
Jun 23, 2004 1.75 ingolf ball Ft Atkinson Jefferson $10K 20:21 local · NCEI
May 12, 2014 1.50 inping pong ball 3.04 W Cold Spg Jefferson — 15:43 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Fort Atkinson
Date Size Location County Damage Time · source
Apr 18, 2025 2.00 inhen egg 2.14 WNW Cold Spg Jefferson — 06:26 local · NCEI
Apr 18, 2025 1.00 inquarter Ft Atkinson Jefferson — 06:25 local · NCEI
Apr 18, 2025 0.75 inpenny 0.51 W Ft Atkinson Jefferson — 06:23 local · NCEI
Aug 24, 2023 1.00 inquarter 3.42 SE Ft Atkinson Muni Arp Jefferson — 17:32 local · NCEI
Aug 24, 2023 1.00 inquarter 0.51 W Ft Atkinson Jefferson — 17:25 local · NCEI
Apr 4, 2023 1.00 inquarter 0.51 E Ft Atkinson Jefferson — 21:45 local · NCEI
Jun 11, 2021 0.88 innickel 0.51 E Ft Atkinson Jefferson — 11:35 local · NCEI
May 12, 2014 1.50 inping pong ball 3.04 W Cold Spg Jefferson — 15:43 local · NCEI
May 12, 2014 1.75 ingolf ball 0.92 E Ft Atkinson Jefferson — 15:35 local · NCEI
May 1, 2012 1.75 ingolf ball 1 NE Ft Atkinson Jefferson — 15:27 local · NCEI
Jun 21, 2010 1.00 inquarter Ft Atkinson Jefferson — 19:24 local · NCEI
Jun 21, 2010 1.50 inping pong ball 2 SW Ft Atkinson Jefferson $15K 19:22 local · NCEI

Hail history near Fort Atkinson

Questions about hail in Fort Atkinson

How often does it hail in Fort Atkinson, Wisconsin?

20 hail reports have been logged in and within about 5 km (3 miles) of Fort Atkinson since 2000. Over the 20 years 2006–2025 that averages 0.8 reports a year. That ranks #71 of 271 Wisconsin places by number of reports.

When is hail season in Fort Atkinson?

Most reports come in June, August, April. June alone accounts for 35% of all reports.

What is the largest hail recorded in Fort Atkinson?

2.00 in (hen egg size) on April 18, 2025 near 2.14 WNW Cold Spg. 5% of reports here were 2 inches or larger.

When did it last hail in Fort Atkinson?

The most recent report in this data is from April 18, 2025 (2.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Fort Atkinson had in the last five years?

3 separate days with hail reports since November 3, 2021, adding up to 6 reports. The most recent was April 18, 2025.

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.