Historical hail archive: January 2016–December 2025. NOAA radar estimates within 25 miles of each city centre. ZIP matches use the first three digits; this is not a property-level report or a live alert service. Coverage and source.
Maricopa County · Arizona · NOAA radar record 2016–2025
Hail damage in Phoenix, AZ
Radar has detected hail over Phoenix on 142 separate days since 2016. On 34 of them the largest stone was estimated at golf-ball size or bigger. The biggest was 10.2 cm on May 31, 2020.
A high value in this historical exposure model. Radar estimates do not establish what reached a property or whether it was damaged.
How we got to that number
| Component | Value | Weight | Contribution |
|---|---|---|---|
| Frequency Hail days per year at 1.00 in (2.5 cm) or larger | 25 / 100 | × 0.35 | 8.8 |
| Severity Largest stone radar estimated in the whole window | 100 / 100 | × 0.30 | 30.0 |
| Recency How long since the last 2 in (5 cm) day | 95 / 100 | × 0.20 | 19.0 |
| Concentration Hail days per year reaching golf-ball size | 17 / 100 | × 0.15 | 2.5 |
| RoofTake Score | 60 | ||
The score describes an area, not a house. Two roofs on the same street of different ages face very different risk from the identical storm. The whole formula and its weights are on the methodology page, and you can recompute it yourself from our public data.
Rare, but the October 2010 storm alone caused roughly $2.7 billion in damage.
Check your own ZIP code Is your roof damaged?
Data last refreshed: · source: NOAA NCEI Severe Weather Data Inventory, dataset nx3hail
The ten biggest hail days in Phoenix since 2016
| Date | Radar max size | Metric | Comparison | Signatures |
|---|---|---|---|---|
| May 31, 2020 | 4.00 in | 10.2 cm | Grapefruit | 36 |
| June 2, 2020 | 3.75 in | 9.5 cm | Teacup | 38 |
| August 3, 2016 | 2.75 in | 7.0 cm | Baseball | 43 |
| July 9, 2018 | 2.75 in | 7.0 cm | Baseball | 53 |
| July 13, 2021 | 2.75 in | 7.0 cm | Baseball | 16 |
| October 6, 2021 | 2.75 in | 7.0 cm | Baseball | 18 |
| September 13, 2023 | 2.75 in | 7.0 cm | Baseball | 40 |
| September 26, 2025 | 2.75 in | 7.0 cm | Baseball | 183 |
| October 12, 2025 | 2.75 in | 7.0 cm | Baseball | 1 |
| September 8, 2020 | 2.50 in | 6.3 cm | Tennis ball | 12 |
"Signatures" is the number of separate radar volume scans that detected hail in a storm cell within 25 miles that day. More signatures means a longer-lived or larger storm, not necessarily bigger stones.
Hail days by year
Busiest year in the record: 2022 with 31 hail days.
Hail days by month
Peak month: August. Hail season in Arizona is short and it is not distributed evenly — most of the annual risk arrives in a few weeks.
What to do with this if you own a roof in Phoenix
- Find your dates. Look up your ZIP for the record nearest you, and note every day at 1.00 in or above since you bought the house.
- Work out whether your roof could have survived them. A twelve-year-old asphalt roof and a two-year-old one respond very differently to the same stone — the age calculator explains why.
- Look, before you file. Nine photographs, none of them requiring you to get on the roof.
- Check the arithmetic. If the actual cash value of the damage is under your deductible, filing pays nothing — work it out first.
- Then write. The letter generator puts the Phoenix radar record and the NOAA citation into your notice of claim.
Every hail day radar recorded near Phoenix
142 days, most recent first. Sizes are radar estimates of the largest stone aloft in the cell, not measurements at any address.
- November 20, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- October 12, 20252.75 in (7.0 cm) — Baseball size, radar-estimated
- September 28, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- September 27, 20250.50 in (1.3 cm) — Marble size, radar-estimated
- September 26, 20252.75 in (7.0 cm) — Baseball size, radar-estimated
- September 19, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- September 4, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- August 15, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- August 14, 20250.50 in (1.3 cm) — Marble size, radar-estimated
- July 4, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- July 3, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- May 4, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- September 1, 20240.50 in (1.3 cm) — Marble size, radar-estimated
- August 22, 20241.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 11, 20240.50 in (1.3 cm) — Marble size, radar-estimated
- August 10, 20240.50 in (1.3 cm) — Marble size, radar-estimated
- August 8, 20241.00 in (2.5 cm) — Quarter size, radar-estimated
- August 7, 20241.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 4, 20241.00 in (2.5 cm) — Quarter size, radar-estimated
- July 26, 20241.25 in (3.2 cm) — Half dollar size, radar-estimated
- July 25, 20241.75 in (4.4 cm) — Golf ball size, radar-estimated
- July 21, 20241.25 in (3.2 cm) — Half dollar size, radar-estimated
- July 15, 20242.50 in (6.3 cm) — Tennis ball size, radar-estimated
- March 19, 20240.75 in (1.9 cm) — Penny size, radar-estimated
- March 8, 20241.25 in (3.2 cm) — Half dollar size, radar-estimated
- September 13, 20232.75 in (7.0 cm) — Baseball size, radar-estimated
- September 12, 20231.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 18, 20230.50 in (1.3 cm) — Marble size, radar-estimated
- August 17, 20230.50 in (1.3 cm) — Marble size, radar-estimated
- August 8, 20231.00 in (2.5 cm) — Quarter size, radar-estimated
- July 27, 20231.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- July 25, 20231.25 in (3.2 cm) — Half dollar size, radar-estimated
- October 16, 20222.00 in (5.1 cm) — Hen egg size, radar-estimated
- October 15, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- October 6, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- October 3, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- September 28, 20221.25 in (3.2 cm) — Half dollar size, radar-estimated
- September 27, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- September 24, 20221.25 in (3.2 cm) — Half dollar size, radar-estimated
- September 23, 20221.00 in (2.5 cm) — Quarter size, radar-estimated
- September 14, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- September 12, 20221.25 in (3.2 cm) — Half dollar size, radar-estimated
- September 3, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- September 2, 20221.00 in (2.5 cm) — Quarter size, radar-estimated
- August 27, 20221.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 24, 20221.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 23, 20221.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 22, 20221.00 in (2.5 cm) — Quarter size, radar-estimated
- August 17, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- August 15, 20221.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 14, 20222.00 in (5.1 cm) — Hen egg size, radar-estimated
- August 12, 20222.25 in (5.7 cm) — Hen egg size, radar-estimated
- August 8, 20221.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 4, 20220.50 in (1.3 cm) — Marble size, radar-estimated
- July 31, 20222.25 in (5.7 cm) — Hen egg size, radar-estimated
- July 18, 20221.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- July 17, 20220.75 in (1.9 cm) — Penny size, radar-estimated
- July 14, 20221.25 in (3.2 cm) — Half dollar size, radar-estimated
- June 29, 20220.75 in (1.9 cm) — Penny size, radar-estimated
- June 27, 20220.75 in (1.9 cm) — Penny size, radar-estimated
Showing the 60 most recent of 142. The full record is in the JSON we publish: phoenix-az.json.
From people in Phoenix
The part of this page that no dataset can produce. Everything here is read by a human before it appears.
Neighbourhood reports
Claim outcomes
Damage photos from Phoenix storms
Hail in Phoenix, AZ: common questions
How often does Phoenix get damaging hail?
Radar recorded 142 hail days within 25 miles of the city centre between 2016 and 2025 — an average of 14.2 a year, of which 3.4 a year were at golf-ball size or larger. Not every one of those damages roofs.
When is hail season in Phoenix?
The busiest month in this record is August, and 2022 was the busiest single year with 31 hail days.
Does this mean my roof is damaged?
No. These are radar estimates of the largest stone aloft in a storm cell somewhere within 25 miles of the city centre. Whether anything landed on your street, and whether it damaged your particular roof, needs somebody to look.
How do I use this for an insurance claim?
A specific date with a public, citable source is what turns 'sometime last year' into a date of loss. Use the claim letter generator, which pulls the date and the NOAA citation in for you.
Why 25 miles?
It is wide enough to catch storms that clipped the metro and narrow enough that the number still means something for a house inside it. The same radius is used for every metro so the pages are comparable.
Get quotes from roofers who work in Phoenix
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