Hail history for Siskiyou County, CA

Siskiyou County has 23 recorded hail events in the NOAA Storm Events Database — 15 of them 1″ or larger and 1 at 2″ or larger. The largest on record: 2.0″ (hen egg) on July 26, 2010.

Records 1950–present Data through April 2026 Peak month July

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 23 since 1958

1″ or larger 15 NWS severe threshold

2″ or larger 1 hen egg class and up

Largest recorded 2.0″ hen egg · July 26, 2010

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 Siskiyou County

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

Most recent recorded events

Latest 8 of 23 recorded events · data through April 2026
Date	Size	Comparable to
July 23, 2018	1.0″	Quarter
July 22, 2018	1.0″	Quarter
July 15, 2018	1.0″	Quarter
May 4, 2017	1.0″	Quarter
August 5, 2016	1.0″	Quarter
July 7, 2015	1.75″	Golf ball
July 5, 2015	1.0″	Quarter
July 22, 2014	1.0″	Quarter

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

From the storm reports

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

July 23, 2018 · 1.0″ (quarter)

A spotter 2SW MacDoel reported hail, most of which were nickel-sized, but a few were quarter-sized.

July 7, 2015 · 1.75″ (golf ball)

An employee at Quigley's General Store reported golf-ball sized hail.

July 26, 2010 · 2.0″ (hen egg)

Trained spotter SY37 in Greenview reported hail in excess of one inch in diameter 3 miles west of highway 3 at 26/1456 PST. Trained spotter SY151 reported 2 inch hail 2 miles south of Greenview at 26/1505 PST. See picture for hail imagery.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
2	0	0	0	2	6	13	0

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 Siskiyou County

Has it ever hailed in Siskiyou County?

Yes — 23 hail events have been recorded for Siskiyou County, CA in the NOAA Storm Events Database since 1958, including 15 of 1″ (quarter size) or larger.

When did it last hail in Siskiyou County?

The most recent recorded hail event for Siskiyou County, CA is July 23, 2018, with 1.0″ (quarter) 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 Siskiyou County?

2.0″ (hen egg), recorded on July 26, 2010. Hail that size meets or exceeds the National Weather Service 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.