Hail history for Larimer County, CO

Larimer County has 616 recorded hail events in the NOAA Storm Events Database — 426 of them 1″ or larger and 29 at 2″ or larger. The largest on record: 4.5″ (grapefruit) on July 30, 1979.

Records 1950–present Data through April 2026 Peak month June

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 616 since 1955

1″ or larger 426 NWS severe threshold

2″ or larger 29 hen egg class and up

Largest recorded 4.5″ grapefruit · July 30, 1979

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Larimer County

Recorded events by month, 1950–present. The amber bar marks Larimer County's peak: June.

Most recent recorded events

Latest 8 of 616 recorded events · data through April 2026
Date	Size	Comparable to
September 16, 2025	0.75″	Penny
June 29, 2025	1.0″	Quarter
June 29, 2025	1.0″	Quarter
June 17, 2025	1.5″	Ping-pong ball
June 17, 2025	2.5″	Tennis ball
June 17, 2025	0.75″	Penny
June 17, 2025	2.0″	Hen egg
July 20, 2024	1.0″	Quarter

Looking for a specific storm? Use the did-it-hail date lookup for Larimer County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

June 17, 2025 · 2.0″ (hen egg)

Report from mping.

August 3, 2013 · 4.0″ (softball)

Very large hail caused extensive damage to homes, automobiles and trees and crops.

July 16, 1994 · 2.75″ (baseball)

Hail up to baseball-size caused considerable damage to buildings and vehicles, as well as crops, over portions of Larimer County.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	7	13	65	95	170	203	62

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Larimer County

Has it ever hailed in Larimer County?

Yes — 616 hail events have been recorded for Larimer County, CO in the NOAA Storm Events Database since 1955, including 426 of 1″ (quarter size) or larger.

When did it last hail in Larimer County?

The most recent recorded hail event for Larimer County, CO is September 16, 2025, with 0.75″ (penny) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Larimer County?

4.5″ (grapefruit), recorded on July 30, 1979. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More Colorado hail history

All 64 Colorado counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.