Hail history for Whiteside County, Illinois
Every NOAA hail report filed in Whiteside County since 1964, with preliminary National Weather Service reports to November 3, 2026.
Readout · Whiteside County
- Last hail
- Aug 21, 2026
- 0.88 in, nickel size · preliminary
- Hail days, last 5 years
- 12
- since Nov 3, 2021 · 17 reports
- Largest ever
- 2.00 in
- hen egg · Feb 28, 2017
164 reports on 98 days since 1964 · #24 of 103 Illinois counties
Hail map · Whiteside County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
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What the record says about Whiteside County
The latest hail report in Whiteside County is from August 21, 2026, 0.88 in (nickel size). Since November 3, 2021 there have been 12 separate hail days; the biggest stones in that time were 1.75 in on August 5, 2024.
Over the 20 years 2006–2025, Whiteside County logged 93 reports on 52 hail days, about 4.7 reports a year. That is 79% more than the median Illinois county (2.6 a year) and ranks #24 of 103 Illinois counties for all-time reports. Whiteside County holds 1% of all 12,418 hail reports in Illinois.
1% of reports with a size were 2 inches (hen egg) or larger, against 5% for the median Illinois county. The largest hail on record here is 2.00 in (hen egg) on February 28, 2017 near 0.52 E Sterling.
Reports were down 37% in 2016–2025 (36) compared with 2006–2015 (57). The busiest year was 2006, with 15 reports on 7 days. Hail here peaks in May (33% of reports); 64% fall between April and June.
Reports a year 2006–2025 average
- Whiteside County 4.7
- Median Illinois county 2.6
Hail days 2006–2025
- Whiteside County 52
- Median Illinois county 34
Share 2 in or larger of sized reports
- Whiteside County 1%
- Median Illinois county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 1 | 1 | 4 | |||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 4 | 1 | 2 | 1 | 8 | ||||||||
| 2023 | 1 | 1 | 2 | ||||||||||
| 2022 | 1 | 1 | 2 | ||||||||||
| 2021 | 3 | 3 | |||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 2 | 2 | 4 | ||||||||||
| 2018 | 5 | 1 | 6 | ||||||||||
| 2017 | 5 | 1 | 2 | 8 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 21, 2026 | 1 | 0.88 in | View |
| Apr 2, 2026 | 1 | 1.50 in | — |
| Mar 10, 2026 | 2 | 1.00 in | — |
| May 15, 2025 | 1 | 1.25 in | — |
| Aug 5, 2024 | 1 | 1.75 in | — |
| May 7, 2024 | 2 | 1.00 in | — |
| Mar 4, 2024 | 1 | 1.00 in | — |
| Feb 27, 2024 | 4 | 1.00 in | — |
| Apr 4, 2023 | 1 | 1.00 in | — |
| Mar 31, 2023 | 1 | 1.00 in | — |
| Nov 4, 2022 | 1 | 1.00 in | — |
| Aug 19, 2022 | 1 | 0.75 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Feb 28, 2017 | 2.00 inhen egg | 0.52 E Sterling | 16:54 local · NCEI |
| Jun 19, 1964 | 2.00 inhen egg | — | 18:45 local · NCEI |
| Aug 5, 2024 | 1.75 ingolf ball | 1.24 NW Penrose | 16:25 local · NCEI |
| Sep 7, 2021 | 1.75 ingolf ball | 2.81 N Ustick | 11:44 local · NCEI |
| Sep 7, 2021 | 1.75 ingolf ball | 2.92 NW Ustick | 11:41 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 81 49%
- 1–2 in 81 49%
- 2 in + 2 1%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 21, 2026 | 0.88 innickel | 1 NE Fulton | 00:38 UTC · NWS prelim. |
| Apr 2, 2026 | 1.50 inping pong ball | 2.48 SW Sterling Arpt | 17:20 local · NCEI |
| Mar 10, 2026 | 1.00 inquarter | 0.51 E Fulton | 18:10 local · NCEI |
| Mar 10, 2026 | 1.00 inquarter | 0.69 N Albany | 18:06 local · NCEI |
| May 15, 2025 | 1.25 inhalf dollar | 1.24 SW Deer Grove | 16:42 local · NCEI |
| Aug 5, 2024 | 1.75 ingolf ball | 1.24 NW Penrose | 16:25 local · NCEI |
| May 7, 2024 | 1.00 inquarter | Grimes Addition | 11:33 local · NCEI |
| May 7, 2024 | 1.00 inquarter | 4.63 NNW Tampico | 11:24 local · NCEI |
| Mar 4, 2024 | 1.00 inquarter | 1.03 W Rock Falls | 16:05 local · NCEI |
| Feb 27, 2024 | 0.88 innickel | 2.07 SW Sterling Arpt | 17:33 local · NCEI |
| Feb 27, 2024 | 0.88 innickel | 2.07 SW Sterling Arpt | 17:23 local · NCEI |
| Feb 27, 2024 | 1.00 inquarter | 2.07 N Leon Corners | 17:00 local · NCEI |
Cities and towns in Whiteside County
| Place | Reports | Largest |
|---|---|---|
| Morrison | 25 | 1.75 in |
| Sterling | 22 | 2.00 in |
| Prophetstown | 15 | 1.75 in |
| Rock Falls | 14 | 1.75 in |
| Erie | 12 | 1.75 in |
| Fulton | 10 | 1.00 in |
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Coleta | 6 | 6 | Feb 28, 2017 |
| Albany | 5 | 4 | Mar 10, 2026 |
| Deer Grove | 4 | 4 | May 15, 2025 |
| Tampico | 4 | 3 | Jun 9, 2011 |
| Como | 2 | 2 | May 22, 2011 |
| Hillsdale | 2 | 2 | Apr 6, 2010 |
| Lyndon | 2 | 2 | May 31, 1987 |
| Galt | 1 | 1 | May 7, 2024 |
Questions about hail in Whiteside County
How often does it hail in Whiteside County, Illinois?
164 hail reports have been logged in Whiteside County since 1964. Over the 20 years 2006–2025 that averages 4.7 reports a year. That ranks #24 of 103 Illinois counties by number of reports.
When is hail season in Whiteside County?
Most reports come in May, June, April. May alone accounts for 33% of all reports.
What is the largest hail recorded in Whiteside County?
2.00 in (hen egg size) on February 28, 2017 near 0.52 E Sterling. 1% of reports here were 2 inches or larger.
When did it last hail in Whiteside County?
The most recent report in this data is from August 21, 2026 (0.88 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Whiteside County had in the last five years?
12 separate days with hail reports since November 3, 2021, adding up to 17 reports. The most recent was August 21, 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.