Hail History

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Hail history for Cos Cob, CT

Last hail within 10 milesJun 6, 20231.25 in (half dollar)
Hail days, last 12 monthsNone
Largest hail since 20063 in (tea cup)Aug 1, 2011
Hail days since 200612
Days with hail 1 inch or larger7
Tornadoes within 10 miles7
Damaging wind reports within 10 miles118

Hail has been reported within 10 miles of Cos Cob on 12 days since 2006. The largest stones measured 3 in (tea cup) on Aug 1, 2011. Hail is most common here in June and July.

Recent hail near Cos Cob

No hail was reported within 10 miles of Cos Cob in the last two years.

Hail days near Cos Cob by year

20620720809110211112131415161711819202122123242526

When hail season peaks near Cos Cob

Of the 12 hail days since 2006, most fell in June (4) and July (4).

JanFebMarAprMay4Jun4Jul3AugSep1OctNovDec

Largest hail storms near Cos Cob

Aug 1, 2011 · 3 in (tea cup) · White Plains (9 mi from Cos Cob)

National Weather Service description (English): Large apple size (three inch) hail was reported in White Plains.

Jul 21, 2010 · 1.75 in (golf ball) · Stamford (4 mi from Cos Cob)

Jun 6, 2023 · 1.25 in (half dollar) · Centre Is (9 mi from Cos Cob)

Jul 18, 2006 · 1 in (quarter) · Darien (8 mi from Cos Cob)

Aug 11, 2008 · 1 in (quarter) · Bayville (9 mi from Cos Cob)

Tornadoes within 10 miles of Cos Cob

DateRatingWherePath
Jul 21, 2026EF?Harrison
6 mi from Cos Cob
Jul 21, 2026EF?Rye Brook
5 mi from Cos Cob
Jul 21, 2026EF?Rye Brook
4 mi from Cos Cob
Jul 21, 2026EF?Rye Brook
4 mi from Cos Cob
Oct 2, 2018EF1New Canaan
9 mi from Cos Cob		3.8 mi long, 100 yd wide
Jul 1, 2013EF0Stanwich
5 mi from Cos Cob		3.7 mi long, 150 yd wide
Jul 12, 2006F1North Greenwich
7 mi from Cos Cob		2.0 mi long, 100 yd wide

Damaging thunderstorm winds near Cos Cob

118 reports of damaging thunderstorm wind within 10 miles of Cos Cob since 2006, on 61 days. The strongest measured gust was 75 mph on Jul 4, 2026.

DateStrongest gustWhereSource
Jul 21, 2026damage reportedNew Canaan, Old Greenwich, Harrison
8 wind reports		NWS storm report (preliminary)
Jul 4, 202675 mph, measuredGlen Cove, Rowayton
4 wind reports		NWS storm report (preliminary)
Jun 6, 202664 mph, measuredLaffingtown, Armonk, Stamford
3 wind reports		NOAA Storm Events
Jul 25, 202558 mph, estimatedNew Canaan
1 wind report		NOAA Storm Events
Aug 6, 202461 mph, measuredMamaroneck
1 wind report		NOAA Storm Events
Aug 3, 202463 mph, estimatedArmonk
1 wind report		NOAA Storm Events
Jul 17, 202469 mph, estimatedBanksville, Noroton
2 wind reports		NOAA Storm Events
Jul 15, 202458 mph, estimatedTalmadge Hill
1 wind report		NOAA Storm Events
Apr 29, 202461 mph, measuredMamaroneck
1 wind report		NOAA Storm Events
Jul 29, 202364 mph, measuredLaffingtown, Palmers Hill
2 wind reports		NOAA Storm Events

Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.

Filing a roof or car hail claim?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Cos Cob; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.

Nearby cities

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Cos Cob.

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