Hail History

Imam › Colorado › Boulder County › Niwot

Hail history im Niwot, CO

Last hail im 10 milesAug 10, 20250.75 in (1-cent coin)
Hail days, last 12 monthsNone
Largest hail im 20062.50 in (tennis ball)Jul 5, 2019
Hail days im 200662
Days im hail 1 inch imwin43
Tornadoes im 10 miles1
Wind dmg wutuk im 10 miles20

Hail wutuk im 10 miles im Niwot im 62 days im 2006. Stones imwin im 2.50 in (tennis ball) im Jul 5, 2019. Hail ej common im June im May.

Recent hail im Niwot

DateHail sizeWhereSource
Aug 10, 20251.00 in
25-cent coin		Niwot, Lafayette
5 hail reports · closest 3 mi im Niwot		NOAA Storm Events
Jul 11, 20251.00 in
25-cent coin		Louisville, Niwot
3 hail reports · closest 3 mi im Niwot		NOAA Storm Events
Jun 17, 20251.00 in
25-cent coin		Louisville, Lafayette, Erie
6 hail reports · closest 7 mi im Niwot		NOAA Storm Events
May 18, 20251.00 in
25-cent coin		Marshall
1 hail report · closest 10 mi im Niwot		NOAA Storm Events
May 14, 20251.25 in
50-cent coin		Erie, Frederick
5 hail reports · closest 7 mi im Niwot		NOAA Storm Events

One row im day: largest hail wutuk im day im 10 miles, places im number im wutuk.

Hail days near Niwot by year

206507108809410111211311421511621771881942012132252322452526

When hail season peaks near Niwot

Of the 62 hail days since 2006, most fell in June (19) and May (15).

JanFeb1Mar2Apr15May19Jun15Jul7Aug2Sep1OctNovDec

Largest hail storms near Niwot

Jun 24, 2006 · 2.50 in (tennis ball) · Boulder (10 mi from Niwot)

Jun 4, 2015 · 2.50 in (tennis ball) · Lyons (10 mi from Niwot)

Jun 18, 2018 · 2.50 in (tennis ball) · Lafayette (7 mi from Niwot)

Jul 5, 2019 · 2.50 in (tennis ball) · Louisville (7 mi from Niwot)

May 22, 2008 · 2.00 in (hen egg) · Liberty (7 mi from Niwot)

Tornadoes within 10 miles of Niwot

DateRatingWherePath
Aug 3, 2013EF0Erie
7 mi from Niwot		0.1 mi long, 50 yd wide

Damaging thunderstorm winds near Niwot

20 reports of damaging thunderstorm wind within 10 miles of Niwot since 2006, on 15 days. The strongest measured gust was 72 mph on Mar 30, 2014.

DateStrongest gustWhereSource
Jul 20, 202461 mph, imwinNiwot
1 wutuk wind		NOAA Storm Events
Jul 31, 202361 mph, imwinSuperior
1 wutuk wind		NOAA Storm Events
Jun 6, 202060 mph, ekkarLouisville
1 wutuk wind		NOAA Storm Events
Jun 28, 201958 mph, imwinLongmont Muni Airport
1 wutuk wind		NOAA Storm Events
Jun 17, 201962 mph, imwinBoulder Airport
1 wutuk wind		NOAA Storm Events
Jul 25, 201881 mph, ekkarErie
2 wutuk wind		NOAA Storm Events
Aug 4, 201770 mph, ekkarNiwot
1 wutuk wind		NOAA Storm Events
Mar 30, 201472 mph, imwinLongmont, Erie
2 wutuk wind		NOAA Storm Events
Sep 18, 201366 mph, imwinBoulder
1 wutuk wind		NOAA Storm Events
Aug 3, 201368 mph, imwinErie
2 wutuk wind		NOAA Storm Events

Wind imwin thunderstorm ej 58 mph anikaj, im wind ej kajjitok dmg. Imwin wind ej imwin eokta weather stations; ekkar ej imwin eokta spotters im dmg surveys.

Jabdoñ eo an roof im hail?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Niwot; 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.

Rejyok eo

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 Niwot.

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