Hail history for Napa County, California
Every NOAA hail report filed in Napa County since 1958, with preliminary National Weather Service reports to November 3, 2026.
Readout · Napa County
- Last hail
- Jun 11, 2017
- 0.25 in, pea size
- Hail days, last 5 years
- 0
- since Nov 3, 2021 · 0 reports
- Largest ever
- 1.75 in
- golf ball · Aug 19, 1983
7 reports on 6 days since 1958 · #38 of 47 California counties
Hail map · Napa County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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Send a request to Moxisync Labs for review. The latest hail report in Napa County is from June 11, 2017. We’re building local roofer coverage. Submitting a request does not guarantee a quote or book an inspection.
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What the record says about Napa County
The latest hail report in Napa County is from June 11, 2017, 0.25 in (pea size). There has been no hail report here in the five years since November 3, 2021.
Over the 20 years 2006–2025, Napa County logged 2 reports on 2 hail days, about 0.1 reports a year. That is 25% of the median California county (0.4 a year) and ranks #38 of 47 California counties for all-time reports. Napa County holds 1% of all 938 hail reports in California.
0% of reports with a size were 2 inches (hen egg) or larger, against 0% for the median California county. The largest hail on record here is 1.75 in (golf ball) on August 19, 1983.
The busiest year was 2004, with 2 reports on 2 days. Hail here peaks in June (29% of reports); 29% fall between April and June.
Reports a year 2006–2025 average
- Napa County 0.1
- Median California county 0.4
Hail days 2006–2025
- Napa County 2
- Median California county 7
Share 2 in or larger of sized reports
- Napa County 0%
- Median California county 0%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 19, 1983 | 1.75 ingolf ball | — | 18:20 local · NCEI |
| Jul 28, 1958 | 1.00 inquarter | — | 15:30 local · NCEI |
| Jul 28, 1958 | 1.00 inquarter | — | 15:30 local · NCEI |
| Oct 26, 2004 | 0.75 inpenny | 15 SE Yountville | 19:45 local · NCEI |
| Jun 8, 2004 | 0.75 inpenny | 10 N Yountville | 15:30 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 4 57%
- 1–2 in 3 43%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 11, 2017 | 0.25 inpea | Calistoga | 15:03 local · NCEI |
| Sep 26, 2014 | 0.50 inmarble | Napa | 17:30 local · NCEI |
| Oct 26, 2004 | 0.75 inpenny | 15 SE Yountville | 19:45 local · NCEI |
| Jun 8, 2004 | 0.75 inpenny | 10 N Yountville | 15:30 local · NCEI |
| Aug 19, 1983 | 1.75 ingolf ball | — | 18:20 local · NCEI |
| Jul 28, 1958 | 1.00 inquarter | — | 15:30 local · NCEI |
| Jul 28, 1958 | 1.00 inquarter | — | 15:30 local · NCEI |
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Angwin | 2 | 1 | Jul 28, 1958 |
| American Canyon | 1 | 1 | Aug 19, 1983 |
| Calistoga | 1 | 1 | Jun 11, 2017 |
| Green Valley | 1 | 1 | Oct 26, 2004 |
| Napa | 1 | 1 | Sep 26, 2014 |
Questions about hail in Napa County
How often does it hail in Napa County, California?
7 hail reports have been logged in Napa County since 1958. Over the 20 years 2006–2025 that averages 0.1 reports a year. That ranks #38 of 47 California counties by number of reports.
When is hail season in Napa County?
Most reports come in June, July, August. June alone accounts for 29% of all reports.
What is the largest hail recorded in Napa County?
1.75 in (golf ball size) on August 19, 1983. 0% of reports here were 2 inches or larger.
When did it last hail in Napa County?
The most recent report in this data is from June 11, 2017 (0.25 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Napa County had in the last five years?
None: there has been no hail report in Napa County since November 3, 2021. The last one was on June 11, 2017.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.