Rialto, California hail history
10
Days with hail on record
0
Carried by two or more independent sources
10
Measured by a person or an instrument
0.75in
Largest measured, Aug 2005
What was searched
| Evidence | Sources | Record from | Reports within 10 mi |
|---|---|---|---|
| Ground observation | ×6 | 1996 | 12 |
| Radar detection | ×1 | When an address is run | None |
| Official NWS warning | ×1 | When an address is run | None |
| Federal declaration | ×1 | When an address is run | None |
Hail days by year in Rialto, CA
Measured Detected only 1.00″ or more
Each mark is one day with hail on record, placed where it fell in the year, and each opens the record for that day. A row with nothing on it is a year with nothing on record.
Best-attested hail storms near Rialto
Most sources first
| Date | Largest | Measured | Reports | Sources |
|---|---|---|---|---|
| 15 Aug 2005 | 0.75″ | 0.75″ | 1 | ×1 |
| 14 Aug 2005 | 0.75″ | 0.75″ | 1 | ×1 |
| 13 Mar 2025 | 0.50″ | 0.50″ | 1 | ×1 |
| 03 Jan 2024 | 0.25″ | 0.25″ | 1 | ×1 |
| 22 Dec 2023 | 0.25″ | 0.25″ | 1 | ×1 |
| 01 Mar 2023 | 0.25″ | 0.25″ | 2 | ×1 |
| 08 Apr 2020 | 0.25″ | 0.25″ | 2 | ×1 |
| 15 Dec 2011 | 0.25″ | 0.25″ | 1 | ×1 |
Sources per hail day near Rialto
- One source
- 10
- Two
- 0
- Three or more
- 0
A day carried by one report is a report. A day that radar, a trained observer and a warning all describe is a storm, and it is the kind of day a file can rest on. Every report on these days keeps its own source.
- Wind days
- 151
- Tornado days
- 1
On record within the same 10 miles. Wind history for Rialto. A report for an address searches every family.
Largest hail recorded near Rialto, CA
Measured Detected, not measured
| Date | Size | Evidence | From centre |
|---|---|---|---|
| 14 Aug 2005 | 0.75″ | Ground observation | 6.9 mi N |
| 15 Aug 2005 | 0.75″ | Ground observation | 7.1 mi N |
| 13 Mar 2025 | 0.50″ | Ground observation | 1.6 mi NNE |
| 11 Mar 2006 | 0.25″ | Ground observation | 5.9 mi ENE |
| 09 Feb 2009 | 0.25″ | Ground observation | 5.9 mi ENE |
| 15 Dec 2011 | 0.25″ | Ground observation | 8.7 mi W |
| 08 Apr 2020 | 0.25″ | Ground observation | 9.9 mi W |
| 08 Apr 2020 | 0.25″ | Ground observation | 7.0 mi SE |
The finder lists every day with hail on record within 10 miles of an address in the last 2 years, ranked by how many independent sources carried it, so the day a file names is a day the record holds.
A roof has an age. The record has its days: roof age and hail exposure counts every hail day on record near an address since the year the roof went on.
Get the hail report for an address in Rialto, CA
Everything above is the record around Rialto: enough to know there is something to cite, and from where. None of it says what reached one roof.
Run the address and the same archive is searched at the property: the storm, the date, the measured size, the distance and bearing from the roof, and the federal record each figure came from, in a document that states its own method. About a minute.
Questions about hail in Rialto, CA
How many hail days has Rialto, CA had on record?
10 days with hail within 10 miles of the centre of Rialto since 1996, 0 of them carried by two or more independent sources and 10 with hail measured by a person or an instrument.
When did it last hail in Rialto, CA?
The most recent hail on record near Rialto fell on 13 March 2025, with its largest report 0.50 inches, measured.
What is the largest hail measured near Rialto?
0.75 inches, measured on 14 August 2005, 6.9 miles N of the centre of Rialto.
How do I get a hail report for an address in Rialto?
Enter the address on this page. The Titan Weather report is the paid document: it searches the same archive at the property and lists every hail report with its date, measured size, distance and bearing from the roof, and the federal source it came from. The date-of-loss finder is free and lists the hail days on record near Rialto first.
Hail history near Rialto
Within 30 miles of Rialto, nearest first. A storm that crossed one of these crossed the others, and their counts overlap.
- Fontana 4 mi 10 days
- San Bernardino 6 mi 20 days
- Colton 6 mi 17 days
- Grand Terrace 7 mi 18 days
- Jurupa Valley 9 mi 6 days
- Loma Linda 10 mi 17 days
- Rancho Cucamonga 10 mi 5 days
- Riverside 12 mi 9 days
How this page is made
- What counted
- Every hail report in the archive with a point within 10 miles of the Census centre of Rialto (34.1174, -117.3892). A hail day is a calendar date with at least one report: four sources describing one storm are one afternoon of hail, not four.
- Measured and detected
- A report from a person or an instrument is measured. A radar-derived size is a detection and is marked as one, here and in every document we issue. The two are never added together.
- Severe
- A day counts as severe when its largest report reached 1.00″, the National Weather Service criterion. Smaller hail is still on the record, and still on this page.
- What this is not
- Neighbouring places share reports, so counts are not exclusive. This page is the record around a place; it is not a report on any property, and it states no opinion about one.
- Terms used on this page
- Storm day, independent source, measured and detected: each term this page uses is defined in the glossary as the report prints it.
- Alerts
- The next storm day to enter the record near Rialto can be sent to your inbox, with the figures its page states and nothing about any roof.
- The record
- Searched from 1996 to today. Compiled 24 August 2026 and rebuilt daily as the archive deepens. Records are reproduced as the federal sources published them. The coverage page states what the record holds, by kind and by year.
About this record
Everything here is reproduced from public federal and volunteer weather records, as the agencies and observer networks that publish them released it. Titan Weather compiles the record; it does not observe the weather, and it is not affiliated with any source it cites.
No archive holds everything. Storms cross places where nobody is standing, instruments and spotters cover some areas better than others, sources revise their records, and recent reports can take weeks to arrive and settle. Where this page shows nothing, nothing was found in the sources searched, within the period and area it states. That is not a finding that no weather occurred.
These pages describe the public record near a place or on a date. They do not establish what reached any particular property, and nothing here is insurance, legal or engineering advice.