Hail history for Marin County, CA

Marin County has 12 recorded hail events in the NOAA Storm Events Database — 0 of them 1″ or larger. The largest on record: 0.25″ (pea) on March 10, 2021.

Records 1950–present Data through April 2026 Peak month March

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 12 since 1996

1″ or larger 0 NWS severe threshold

2″ or larger 0 hen egg class and up

Largest recorded 0.25″ pea · March 10, 2021

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 Marin County

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

Most recent recorded events

Latest 8 of 12 recorded events · data through April 2026
Date	Size	Comparable to
March 10, 2021	0.25″	Pea
August 17, 2020	0.25″	Pea
March 25, 2020	0.25″	Pea
December 25, 2019	0.25″	Pea
April 16, 2018	0.25″	Pea
March 17, 2018	0.25″	Pea
March 3, 2018	0.25″	Pea
March 3, 2018	0.25″	Pea

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

From the storm reports

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

March 10, 2021 · 0.25″ (pea)

Image on social media shows small hail in Marin.

August 17, 2020 · 0.25″ (pea)

Spotter reported rain, lightning, and hail. Hail size estimated.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	0	0	1	0	8	3

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 Marin County

Has it ever hailed in Marin County?

Yes — 12 hail events have been recorded for Marin County, CA in the NOAA Storm Events Database since 1996, including 0 of 1″ (quarter size) or larger.

When did it last hail in Marin County?

The most recent recorded hail event for Marin County, CA is March 10, 2021, with 0.25″ (pea) 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 Marin County?

0.25″ (pea), recorded on March 10, 2021. Hail that size is below the National Weather Service 1″ severe threshold. 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 California hail history

All 58 California 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.