Hail history for Janesville, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Janesville since 1982, with preliminary reports to November 3, 2026.
Readout · Janesville
- Last hail
- Jun 15, 2017
- 1.25 in, half dollar size
- Hail days, last 5 years
- 0
- since Nov 3, 2021 · 0 reports
- Largest ever
- 1.75 in
- golf ball · May 25, 2008
10 reports on 7 days since 1982 · #455 of 483 Iowa places
Hail map · Janesville
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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Send a request to Moxisync Labs for review. The latest hail report in Janesville is from June 15, 2017. We’re building local roofer coverage. Submitting a request does not guarantee a quote or book an inspection.
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What the record says about Janesville
The latest hail report in and around Janesville is from June 15, 2017, 1.25 in (half dollar size). There has been no hail report here in the five years since November 3, 2021.
Over the 20 years 2006–2025, Janesville logged 5 reports on 3 hail days, about 0.3 reports a year. That is 44% less than the median Iowa town on this site (0.5 a year) and ranks #455 of 483 Iowa cities and towns on this site for all-time reports. Janesville accounts for 8% of the 128 reports filed in Bremer County.
0% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Iowa town on this site. The largest hail on record here is 1.75 in (golf ball) on May 25, 2008 near 2.54 E Janesville.
The busiest year was 2017, with 3 reports on 1 day. Hail here peaks in June (60% of reports); 90% fall between April and June.
Reports a year 2006–2025 average
- Janesville 0.3
- Bremer County 3.8
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Janesville 3
- Bremer County 20
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Janesville 0%
- Bremer County 9%
- Median Iowa 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 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 3 | 3 |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| May 25, 2008 | 1.75 ingolf ball | 2.54 E Janesville | Bremer | $10K | 16:23 local · NCEI |
| Jun 1, 2001 | 1.75 ingolf ball | 2 E Janesville | Bremer | $10K | 15:28 local · NCEI |
| Jun 1, 2001 | 1.75 ingolf ball | 3 SW Janesville | Bremer | $5K | 15:24 local · NCEI |
| May 11, 2000 | 1.75 ingolf ball | Janesville | Bremer | $10K | 18:00 local · NCEI |
| Jun 15, 2017 | 1.50 inping pong ball | 1.02 E Janesville | Bremer | — | 18:50 local · NCEI |
Size of every report
- Under 1 in 2 20%
- 1–2 in 8 80%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 15, 2017 | 1.25 inhalf dollar | 2.54 W Boies | Black Hawk | — | 19:01 local · NCEI |
| Jun 15, 2017 | 1.25 inhalf dollar | 2.54 E Janesville | Bremer | — | 18:58 local · NCEI |
| Jun 15, 2017 | 1.50 inping pong ball | 1.02 E Janesville | Bremer | — | 18:50 local · NCEI |
| Jun 12, 2013 | 1.00 inquarter | 0.62 ESE Janesville | Bremer | $1K | 16:30 local · NCEI |
| May 25, 2008 | 1.75 ingolf ball | 2.54 E Janesville | Bremer | $10K | 16:23 local · NCEI |
| Jun 1, 2001 | 1.75 ingolf ball | 2 E Janesville | Bremer | $10K | 15:28 local · NCEI |
| Jun 1, 2001 | 1.75 ingolf ball | 3 SW Janesville | Bremer | $5K | 15:24 local · NCEI |
| May 11, 2000 | 1.75 ingolf ball | Janesville | Bremer | $10K | 18:00 local · NCEI |
| Apr 19, 2000 | 0.75 inpenny | 2 SE Finchford | Black Hawk | $1K | 18:15 local · NCEI |
| Jul 6, 1982 | 0.75 inpenny | — | Bremer | — | 18:04 local · NCEI |
Hail history near Janesville
- Waverly 9 km · 22
- Denver 11 km · 16
- Cedar Falls 14 km · 67
- Waterloo 19 km · 98
- Readlyn 20 km · 21
- Clarksville 22 km · 18
- Hudson 23 km · 14
- Plainfield 23 km · 10
Questions about hail in Janesville
How often does it hail in Janesville, Iowa?
10 hail reports have been logged in and within about 5 km (3 miles) of Janesville since 1982. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #455 of 483 Iowa places by number of reports.
When is hail season in Janesville?
Most reports come in June, May, April. June alone accounts for 60% of all reports.
What is the largest hail recorded in Janesville?
1.75 in (golf ball size) on May 25, 2008 near 2.54 E Janesville. 0% of reports here were 2 inches or larger.
When did it last hail in Janesville?
The most recent report in this data is from June 15, 2017 (1.25 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Janesville had in the last five years?
None: there has been no hail report in and within about 5 km (3 miles) of Janesville since November 3, 2021. The last one was on June 15, 2017.
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.