Hail History

Hail history for Castle Rock, Colorado

NOAA hail reports in and within about 5 km (3 miles) of Castle Rock since 1969, with preliminary reports to November 3, 2026.

Readout · Castle Rock

Last hail
Jul 28, 2026
1.00 in, quarter size
Hail days, last 5 years
6
since Nov 3, 2021 · 7 reports
Largest ever
2.75 in
baseball · Jun 19, 1977

94 reports on 67 days since 1969 · #10 of 183 Colorado places

Hail map · Castle Rock

Castle Rock Franktown Castle Pines The Pinery Parker Perry Park Larkspur Ponderosa Park Highlands Ranch 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
94 most recent reports with a location; Douglas County is shaded. Open street map

For homeowners

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What the record says about Castle Rock

The latest hail report in and around Castle Rock is from July 28, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 6 separate hail days; the biggest stones in that time were 1.25 in on June 9, 2024.

Over the 20 years 2006–2025, Castle Rock logged 60 reports on 36 hail days, about 3.0 reports a year. That is 3.8 times the median Colorado town on this site (0.8 a year) and ranks #10 of 183 Colorado cities and towns on this site for all-time reports. Castle Rock accounts for 21% of the 444 reports filed in Douglas County.

5% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median Colorado town on this site. The largest hail on record here is 2.75 in (baseball) on June 19, 1977.

Reports were up 31% in 2016–2025 (34) compared with 2006–2015 (26). The busiest year was 2016, with 10 reports on 5 days. Hail here peaks in June (39% of reports); 49% fall between April and June.

Reports a year 2006–2025 average

  • Castle Rock 3.0
  • Douglas County 14.3
  • Median Colorado town on this site 0.8

Hail days 2006–2025

  • Castle Rock 36
  • Douglas County 117
  • Median Colorado town on this site 11

Share 2 in or larger of sized reports

  • Castle Rock 5%
  • Douglas County 4%
  • Median Colorado town on this site 8%

Hail over time

036912 1969: 1 reports, largest 1.00 in 1970 1974: 1 reports, largest 0.75 in 1975: 1 reports, largest 1.75 in 1976: 1 reports, largest 1.75 in 1977: 1 reports, largest 2.75 in 1980: 1 reports, largest 1.00 in 1980 1983: 2 reports, largest 1.75 in 1986: 1 reports, largest 1.75 in 1987: 3 reports, largest 1.00 in 1990: 1 reports, largest 0.75 in 1990 1991: 1 reports, largest 0.75 in 1992: 1 reports, largest 2.00 in 1996: 1 reports, largest 1.00 in 1999: 3 reports, largest 1.00 in 2000: 1 reports, largest 0.75 in 2000 2001: 1 reports, largest 1.75 in 2002: 4 reports, largest 1.00 in 2003: 1 reports, largest 1.75 in 2004: 1 reports, largest 0.75 in 2005: 5 reports, largest 1.00 in 2007: 8 reports, largest 1.25 in 2008: 2 reports, largest 1.00 in 2009: 4 reports, largest 1.75 in 2010 2011: 2 reports, largest 1.00 in 2012: 2 reports, largest 1.00 in 2013: 2 reports, largest 1.00 in 2014: 4 reports, largest 1.75 in 2015: 2 reports, largest 1.00 in 2016: 10 reports, largest 2.00 in 2017: 2 reports, largest 1.50 in 2019: 7 reports, largest 2.50 in 2020: 3 reports, largest 1.25 in 2020 2021: 7 reports, largest 1.00 in 2023: 2 reports, largest 1.25 in 2024: 2 reports, largest 1.25 in 2025: 1 reports, largest 0.75 in 2026: 2 reports, largest 1.00 in
Reports per year, 1969–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
010203040 Jan Feb Mar April: 4 reports (4%) Apr May: 5 reports (5%) May June: 37 reports (39%) Jun July: 22 reports (23%) Jul August: 22 reports (23%) Aug September: 2 reports (2%) Sep October: 2 reports (2%) Oct Nov Dec
All 94 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 2 2
2025 1 1
2024 11 2
2023 11 2
2022 0
2021 25 7
2020 12 3
2019 7 7
2018 0
2017 2 2

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Jul 28, 2026 2 1.00 in —
Oct 27, 2025 1 0.75 in —
Aug 10, 2024 1 1.00 in —
Jun 9, 2024 1 1.25 in —
Jul 31, 2023 1 0.75 in —
May 10, 2023 1 1.25 in —

Largest hail on record

Largest hail reports in Castle Rock
Date Size Location County Time · source
Jun 19, 1977 2.75 inbaseball — Douglas 18:45 local · NCEI
Jun 8, 2019 2.50 intennis ball 2.76 N Castle Rock Douglas 17:17 local · NCEI
Jun 8, 2019 2.50 intennis ball 2.76 N Castle Rock Douglas 16:47 local · NCEI
Jul 1, 2016 2.00 inhen egg 3.2 W Franktown Douglas 13:18 local · NCEI
Jun 19, 1992 2.00 inhen egg — Douglas 16:50 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

Most recent reports

Most recent hail reports in Castle Rock
Date Size Location County Time · source
Jul 28, 2026 1.00 inquarter 2.96 NNW Castle Rock Douglas 13:15 local · NCEI
Jul 28, 2026 0.75 inpenny 2.96 NNW Castle Rock Douglas 13:14 local · NCEI
Oct 27, 2025 0.75 inpenny 4.18 N Castle Rock Douglas 16:19 local · NCEI
Aug 10, 2024 1.00 inquarter 2.54 WNW Castlewood Canyon State Park Douglas 15:48 local · NCEI
Jun 9, 2024 1.25 inhalf dollar 2.76 WSW Franktown Douglas 16:52 local · NCEI
Jul 31, 2023 0.75 inpenny 2.76 WSW Franktown Douglas 17:55 local · NCEI
May 10, 2023 1.25 inhalf dollar 2.76 WSW Franktown Douglas 14:41 local · NCEI
Aug 19, 2021 0.75 inpenny 4.18 N Castle Rock Douglas 14:19 local · NCEI
Aug 19, 2021 0.88 innickel 2.14 W Castle Rock Douglas 13:42 local · NCEI
Aug 19, 2021 0.75 inpenny 2.25 WSW Franktown Douglas 13:40 local · NCEI
Aug 19, 2021 1.00 inquarter 2.14 SSE Castle Rock Douglas 13:33 local · NCEI
Aug 19, 2021 1.00 inquarter 0.87 SE Castle Rock Douglas 13:30 local · NCEI

Hail history near Castle Rock

Questions about hail in Castle Rock

How often does it hail in Castle Rock, Colorado?

94 hail reports have been logged in and within about 5 km (3 miles) of Castle Rock since 1969. Over the 20 years 2006–2025 that averages 3.0 reports a year. That ranks #10 of 183 Colorado places by number of reports.

When is hail season in Castle Rock?

Most reports come in June, July, August. June alone accounts for 39% of all reports.

What is the largest hail recorded in Castle Rock?

2.75 in (baseball size) on June 19, 1977. 5% of reports here were 2 inches or larger.

When did it last hail in Castle Rock?

The most recent report in this data is from July 28, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Castle Rock had in the last five years?

6 separate days with hail reports since November 3, 2021, adding up to 7 reports. The most recent was July 28, 2026.

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.