Hail History

Hail history for Louisville, Colorado

NOAA hail reports in and within about 5 km (3 miles) of Louisville since 1981, with preliminary reports to November 3, 2026.

Readout · Louisville

Last hail
Jul 11, 2025
1.00 in, quarter size
Hail days, last 5 years
1
since Nov 3, 2021 · 1 report
Largest ever
2.00 in
hen egg · Jul 5, 2019

24 reports on 18 days since 1981 · #105 of 183 Colorado places

Hail map · Louisville

Louisville Lafayette Broomfield Boulder Gunbarrel Erie Niwot 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
24 most recent reports with a location; Boulder County is shaded. Open street map

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What the record says about Louisville

The latest hail report in and around Louisville is from July 11, 2025, 1.00 in (quarter size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.00 in on July 11, 2025.

Over the 20 years 2006–2025, Louisville logged 16 reports on 10 hail days, about 0.8 reports a year. That is about the same as the median Colorado town on this site (0.8 a year) and ranks #105 of 183 Colorado cities and towns on this site for all-time reports. Louisville accounts for 7% of the 357 reports filed in Boulder County.

13% 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 2.00 in (hen egg) on July 5, 2019 near 2.23 WNW Louisville.

Reports were up 120% in 2016–2025 (11) compared with 2006–2015 (5). The busiest year was 2019, with 6 reports on 4 days. Hail here peaks in June (46% of reports); 54% fall between April and June.

Reports a year 2006–2025 average

  • Louisville 0.8
  • Boulder County 10.4
  • Median Colorado town on this site 0.8

Hail days 2006–2025

  • Louisville 10
  • Boulder County 66
  • Median Colorado town on this site 11

Share 2 in or larger of sized reports

  • Louisville 13%
  • Boulder County 7%
  • Median Colorado town on this site 8%

Hail over time

0246 1981: 1 reports, largest 1.25 in 1982: 1 reports, largest 2.00 in 1987: 2 reports, largest 1.15 in 1989: 1 reports, largest 0.75 in 1990: 1 reports, largest 1.00 in 1990 1997: 1 reports, largest 0.75 in 2000 2004: 1 reports, largest 0.75 in 2007: 1 reports, largest 0.75 in 2010: 1 reports, largest 1.00 in 2010 2014: 2 reports, largest 1.25 in 2015: 1 reports, largest 1.25 in 2018: 4 reports, largest 2.00 in 2019: 6 reports, largest 2.00 in 2020 2025: 1 reports, largest 1.00 in
Reports per year, 1981–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
051015 Jan Feb Mar April: 2 reports (8%) Apr May June: 11 reports (46%) Jun July: 9 reports (38%) Jul August: 1 reports (4%) Aug September: 1 reports (4%) Sep Oct Nov Dec
All 24 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 1 1
2024 0
2023 0
2022 0
2021 0
2020 0
2019 141 6
2018 4 4
2017 0

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Jul 11, 2025 1 1.00 in —

Largest hail on record

Largest hail reports in Louisville
Date Size Location County Time · source
Jul 5, 2019 2.00 inhen egg 2.23 WNW Louisville Boulder 18:53 local · NCEI
Jun 18, 2018 2.00 inhen egg 1.26 WNW Louisville Boulder 18:46 local · NCEI
Jun 2, 1982 2.00 inhen egg — Boulder 18:45 local · NCEI
Jun 18, 2018 1.75 ingolf ball 1.26 WNW Louisville Boulder 18:43 local · NCEI
Jul 5, 2019 1.25 inhalf dollar 0.87 SW Louisville Boulder 18:55 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 Louisville
Date Size Location County Time · source
Jul 11, 2025 1.00 inquarter 1.26 WNW Louisville Boulder 17:27 local · NCEI
Sep 11, 2019 1.00 inquarter 0.87 NW Louisville Boulder 17:05 local · NCEI
Jul 7, 2019 0.75 inpenny 1.06 W Louisville Boulder 17:02 local · NCEI
Jul 5, 2019 1.25 inhalf dollar 0.87 SW Louisville Boulder 18:55 local · NCEI
Jul 5, 2019 2.00 inhen egg 2.23 WNW Louisville Boulder 18:53 local · NCEI
Jul 5, 2019 1.25 inhalf dollar 0.87 NW Louisville Boulder 18:46 local · NCEI
Jun 8, 2019 1.00 inquarter 0.87 SW Louisville Boulder 14:58 local · NCEI
Jun 18, 2018 2.00 inhen egg 1.26 WNW Louisville Boulder 18:46 local · NCEI
Jun 18, 2018 1.75 ingolf ball 1.26 WNW Louisville Boulder 18:43 local · NCEI
Jun 18, 2018 1.25 inhalf dollar 1.26 WNW Louisville Boulder 18:40 local · NCEI
Jun 18, 2018 1.00 inquarter 1.26 WNW Louisville Boulder 18:39 local · NCEI
Jun 18, 2015 1.25 inhalf dollar 0.87 SW Louisville Boulder 20:01 local · NCEI

Hail history near Louisville

Questions about hail in Louisville

How often does it hail in Louisville, Colorado?

24 hail reports have been logged in and within about 5 km (3 miles) of Louisville since 1981. Over the 20 years 2006–2025 that averages 0.8 reports a year. That ranks #105 of 183 Colorado places by number of reports.

When is hail season in Louisville?

Most reports come in June, July, April. June alone accounts for 46% of all reports.

What is the largest hail recorded in Louisville?

2.00 in (hen egg size) on July 5, 2019 near 2.23 WNW Louisville. 13% of reports here were 2 inches or larger.

When did it last hail in Louisville?

The most recent report in this data is from July 11, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

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

1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was July 11, 2025.

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.