Hail history for Riverside, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Riverside since 2003, with preliminary reports to November 3, 2026.
Readout · Riverside
- Last hail
- Apr 15, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 4 reports
- Largest ever
- 1.75 in
- golf ball · Apr 3, 2011
16 reports on 16 days since 2003 · #253 of 483 Iowa places
Hail map · Riverside
- 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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What the record says about Riverside
The latest hail report in and around Riverside is from April 15, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 1.00 in on April 15, 2026.
Over the 20 years 2006–2025, Riverside logged 14 reports on 14 hail days, about 0.7 reports a year. That is 56% more than the median Iowa town on this site (0.5 a year) and ranks #253 of 483 Iowa cities and towns on this site for all-time reports. Riverside accounts for 16% of the 101 reports filed in Washington 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 April 3, 2011 near 3.18 ESE Riverside.
Reports were down 25% in 2016–2025 (6) compared with 2006–2015 (8). The busiest year was 2017, with 2 reports on 2 days. Hail here peaks in April (44% of reports); 88% fall between April and June.
Reports a year 2006–2025 average
- Riverside 0.7
- Washington County 3.5
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Riverside 14
- Washington County 45
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Riverside 0%
- Washington County 5%
- 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 | 1 | 1 | |||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 | 2 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Apr 15, 2026 | 1 | 1.00 in | — |
| May 7, 2024 | 1 | 0.88 in | — |
| May 6, 2023 | 1 | 1.00 in | — |
| Jul 11, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Apr 3, 2011 | 1.75 ingolf ball | 3.18 ESE Riverside | Washington | — | 18:49 local · NCEI |
| Apr 30, 2003 | 1.75 ingolf ball | 2 S Riverside | Washington | $100K | 18:25 local · NCEI |
| May 17, 2017 | 1.50 inping pong ball | 1.04 E Riverside | Washington | — | 18:46 local · NCEI |
| Apr 9, 2015 | 1.25 inhalf dollar | 0.52 E Riverside | Washington | — | 15:15 local · NCEI |
| Apr 15, 2026 | 1.00 inquarter | 1.24 ENE Riverside | Washington | — | 18:42 local · NCEI |
Size of every report
- Under 1 in 6 38%
- 1–2 in 10 63%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Apr 15, 2026 | 1.00 inquarter | 1.24 ENE Riverside | Washington | 18:42 local · NCEI |
| May 7, 2024 | 0.88 innickel | 3.45 SW Hills | Johnson | 02:58 local · NCEI |
| May 6, 2023 | 1.00 inquarter | 1.04 E Riverside | Washington | 22:20 local · NCEI |
| Jul 11, 2022 | 1.00 inquarter | 1.04 E Riverside | Washington | 05:28 local · NCEI |
| Apr 7, 2020 | 1.00 inquarter | 1.04 E Riverside | Washington | 20:12 local · NCEI |
| May 17, 2017 | 1.50 inping pong ball | 1.04 E Riverside | Washington | 18:46 local · NCEI |
| Apr 15, 2017 | 1.00 inquarter | 1.55 E Riverside | Washington | 16:23 local · NCEI |
| Apr 9, 2015 | 1.25 inhalf dollar | 0.52 E Riverside | Washington | 15:15 local · NCEI |
| Jun 16, 2014 | 0.75 inpenny | 1.55 E Riverside | Washington | 14:55 local · NCEI |
| May 28, 2012 | 1.00 inquarter | 1.55 E Riverside | Washington | 14:55 local · NCEI |
| May 22, 2011 | 0.88 innickel | 1.55 E Riverside | Washington | 15:53 local · NCEI |
| Apr 3, 2011 | 1.75 ingolf ball | 3.18 ESE Riverside | Washington | 18:49 local · NCEI |
Hail history near Riverside
- Hills 9 km · 16
- Kalona 11 km · 11
- Iowa City 19 km · 80
- Conesville 22 km · 14
- Washington 23 km · 30
- Coralville 24 km · 20
- Tiffin 26 km · 13
- West Liberty 28 km · 13
Questions about hail in Riverside
How often does it hail in Riverside, Iowa?
16 hail reports have been logged in and within about 5 km (3 miles) of Riverside since 2003. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #253 of 483 Iowa places by number of reports.
When is hail season in Riverside?
Most reports come in April, May, June. April alone accounts for 44% of all reports.
What is the largest hail recorded in Riverside?
1.75 in (golf ball size) on April 3, 2011 near 3.18 ESE Riverside. 0% of reports here were 2 inches or larger.
When did it last hail in Riverside?
The most recent report in this data is from April 15, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Riverside had in the last five years?
4 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was April 15, 2026.
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.