Hail history for Oswego, Illinois
NOAA hail reports in and within about 5 km (3 miles) of Oswego since 2000, with preliminary reports to November 3, 2026.
Readout · Oswego
- Last hail
- Apr 4, 2023
- 2.00 in, hen egg size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 4 reports
- Largest ever
- 3.00 in
- teacup · Apr 4, 2023
15 reports on 10 days since 2000 · #184 of 378 Illinois places
Hail map · Oswego
- 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 Oswego
The latest hail report in and around Oswego is from April 4, 2023, 2.00 in (hen egg size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 3.00 in on April 4, 2023.
Over the 20 years 2006–2025, Oswego logged 11 reports on 6 hail days, about 0.6 reports a year. That is 10% more than the median Illinois town on this site (0.5 a year) and ranks #184 of 378 Illinois cities and towns on this site for all-time reports. Oswego accounts for 16% of the 92 reports filed in Kendall County.
27% of reports with a size were 2 inches (hen egg) or larger, against 4% for the median Illinois town on this site. The largest hail on record here is 3.00 in (teacup) on April 4, 2023 near 1.57 WSW Boulder Hill.
Reports were up 20% in 2016–2025 (6) compared with 2006–2015 (5). The busiest year was 2023, with 4 reports on 1 day. Hail here peaks in April (33% of reports); 87% fall between April and June.
Reports a year 2006–2025 average
- Oswego 0.6
- Kendall County 2.7
- Median Illinois town on this site 0.5
Hail days 2006–2025
- Oswego 6
- Kendall County 22
- Median Illinois town on this site 8
Share 2 in or larger of sized reports
- Oswego 27%
- Kendall County 11%
- Median Illinois town on this site 4%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 4 | 4 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Apr 4, 2023 | 4 | 3.00 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Apr 4, 2023 | 3.00 inteacup | 1.57 WSW Boulder Hill | Kendall | 12:04 local · NCEI |
| Apr 4, 2023 | 2.00 inhen egg | Oswego | Kendall | 12:04 local · NCEI |
| Apr 4, 2023 | 2.00 inhen egg | 0.69 S Boulder Hill | Kendall | 12:03 local · NCEI |
| May 27, 2019 | 2.00 inhen egg | 0.7 WNW Oswego | Kendall | 12:50 local · NCEI |
| Jun 12, 2013 | 1.75 ingolf ball | 2.18 ENE Oswego | Kendall | 16:35 local · NCEI |
Size of every report
- Under 1 in 2 13%
- 1–2 in 9 60%
- 2 in + 4 27%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Apr 4, 2023 | 2.00 inhen egg | Oswego | Kendall | 12:04 local · NCEI |
| Apr 4, 2023 | 3.00 inteacup | 1.57 WSW Boulder Hill | Kendall | 12:04 local · NCEI |
| Apr 4, 2023 | 1.00 inquarter | 1.69 WSW Boulder Hill | Kendall | 12:03 local · NCEI |
| Apr 4, 2023 | 2.00 inhen egg | 0.69 S Boulder Hill | Kendall | 12:03 local · NCEI |
| Aug 10, 2020 | 1.00 inquarter | Oswego | Kendall | 14:30 local · NCEI |
| May 27, 2019 | 2.00 inhen egg | 0.7 WNW Oswego | Kendall | 12:50 local · NCEI |
| Jun 12, 2013 | 1.00 inquarter | Oswego | Kendall | 16:37 local · NCEI |
| Jun 12, 2013 | 1.75 ingolf ball | 2.18 ENE Oswego | Kendall | 16:35 local · NCEI |
| Jun 12, 2013 | 1.75 ingolf ball | 1.58 SSE Oswego | Kendall | 16:32 local · NCEI |
| Apr 17, 2013 | 0.75 inpenny | Oswego | Kendall | 08:20 local · NCEI |
| Jun 4, 2011 | 1.00 inquarter | 1.6 S Oswego | Kendall | 14:29 local · NCEI |
| May 19, 2005 | 0.75 inpenny | Oswego | Kendall | 15:28 local · NCEI |
Hail history near Oswego
- Montgomery 5 km · 16
- Yorkville 8 km · 22
- Aurora 10 km · 38
- Plainfield 12 km · 45
- Sugar Grove 14 km · 19
- Naperville 16 km · 42
- Plano 16 km · 11
- Plattville 17 km · 10
Questions about hail in Oswego
How often does it hail in Oswego, Illinois?
15 hail reports have been logged in and within about 5 km (3 miles) of Oswego since 2000. Over the 20 years 2006–2025 that averages 0.6 reports a year. That ranks #184 of 378 Illinois places by number of reports.
When is hail season in Oswego?
Most reports come in April, May, June. April alone accounts for 33% of all reports.
What is the largest hail recorded in Oswego?
3.00 in (teacup size) on April 4, 2023 near 1.57 WSW Boulder Hill. 27% of reports here were 2 inches or larger.
When did it last hail in Oswego?
The most recent report in this data is from April 4, 2023 (2.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Oswego had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was April 4, 2023.
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.