Hail history for Affton, Missouri
NOAA hail reports in and within about 5 km (3 miles) of Affton since 1974, with preliminary reports to November 3, 2026.
Readout · Affton
- Last hail
- Mar 14, 2025
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 3 reports
- Largest ever
- 2.75 in
- baseball · May 25, 2011
18 reports on 16 days since 1974 · #258 of 491 Missouri places
Hail map · Affton
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Affton is from March 14, 2025. A local roofer can check and document it at no cost.
Phone line opening soon
What the record says about Affton
The latest hail report in and around Affton is from March 14, 2025, 1.00 in (quarter size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 2.00 in on May 26, 2024.
Over the 20 years 2006–2025, Affton logged 12 reports on 10 hail days, about 0.6 reports a year. That is 20% more than the median Missouri town on this site (0.5 a year) and ranks #258 of 491 Missouri cities and towns on this site for all-time reports. Affton accounts for 3% of the 660 reports filed in St. Louis County.
17% of reports with a size were 2 inches (hen egg) or larger, against 5% for the median Missouri town on this site. The largest hail on record here is 2.75 in (baseball) on May 25, 2011 near Affton.
Reports held about level in 2016–2025 (6) compared with 2006–2015 (6). The busiest year was 2025, with 2 reports on 1 day. Hail here peaks in May (28% of reports); 67% fall between April and June.
Reports a year 2006–2025 average
- Affton 0.6
- St. Louis County 16.9
- Median Missouri town on this site 0.5
Hail days 2006–2025
- Affton 10
- St. Louis County 108
- Median Missouri town on this site 9
Share 2 in or larger of sized reports
- Affton 17%
- St. Louis County 8%
- Median Missouri town on this site 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 2 | 2 | |||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 1 | 2 | ||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Mar 14, 2025 | 2 | 1.00 in | — |
| May 26, 2024 | 1 | 2.00 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| May 25, 2011 | 2.75 inbaseball | Affton | St. Louis | 15:20 local · NCEI |
| May 26, 2024 | 2.00 inhen egg | 1.28 WNW Carondelet | St. Louis (C) | 17:04 local · NCEI |
| Jul 6, 1987 | 2.00 inhen egg | — | St. Louis | 16:17 local · NCEI |
| Jun 1, 2019 | 1.75 ingolf ball | Affton | St. Louis | 19:30 local · NCEI |
| Apr 8, 1980 | 1.75 ingolf ball | — | St. Louis | 02:28 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 6 33%
- 1–2 in 9 50%
- 2 in + 3 17%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Mar 14, 2025 | 1.00 inquarter | Affton | St. Louis | 20:49 local · NCEI |
| Mar 14, 2025 | 1.00 inquarter | 1.08 W Bella Villa | St. Louis | 20:45 local · NCEI |
| May 26, 2024 | 2.00 inhen egg | 1.28 WNW Carondelet | St. Louis (C) | 17:04 local · NCEI |
| Jun 1, 2019 | 1.75 ingolf ball | Affton | St. Louis | 19:30 local · NCEI |
| Jun 9, 2018 | 0.75 inpenny | 0.87 SSW Affton | St. Louis | 10:44 local · NCEI |
| May 27, 2018 | 1.00 inquarter | Affton | St. Louis | 14:34 local · NCEI |
| May 25, 2011 | 2.75 inbaseball | Affton | St. Louis | 15:20 local · NCEI |
| Jun 8, 2009 | 1.50 inping pong ball | Affton | St. Louis | 07:18 local · NCEI |
| Jun 8, 2009 | 1.00 inquarter | Affton | St. Louis | 06:50 local · NCEI |
| Jun 21, 2008 | 0.88 innickel | Affton | St. Louis | 14:10 local · NCEI |
| May 13, 2008 | 0.75 inpenny | Affton | St. Louis | 17:45 local · NCEI |
| Jul 9, 2007 | 0.88 innickel | Affton | St. Louis | 15:30 local · NCEI |
Hail history near Affton
Questions about hail in Affton
How often does it hail in Affton, Missouri?
18 hail reports have been logged in and within about 5 km (3 miles) of Affton since 1974. Over the 20 years 2006–2025 that averages 0.6 reports a year. That ranks #258 of 491 Missouri places by number of reports.
When is hail season in Affton?
Most reports come in May, June, March. May alone accounts for 28% of all reports.
What is the largest hail recorded in Affton?
2.75 in (baseball size) on May 25, 2011 near Affton. 17% of reports here were 2 inches or larger.
When did it last hail in Affton?
The most recent report in this data is from March 14, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Affton had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 3 reports. The most recent was March 14, 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.