261
Recorded events
40
Counties affected
1
Direct deaths
$1.8M
Property damage
Idaho heavy rain history: 261 recorded events across 40 counties between 1996 and 2024.
Decade by decade
Idaho heavy rain history by decade
The 2020s are the busiest decade on record with 99 reported heavy rain events across Idaho. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.
County ranking
Counties with the most heavy rain events in Idaho
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | Elmore County | 27 | 0 | $5K | 1996–2024 |
| #2 | Bannock County | 20 | 0 | $100K | 1996–2014 |
| #3 | Boise County | 19 | 0 | $0 | 1996–2024 |
| #4 | Idaho County | 18 | 0 | $55K | 2001–2017 |
| #5 | Ada County | 17 | 0 | $0 | 1996–2024 |
| #6 | Owyhee County | 14 | 0 | $10K | 1996–2024 |
| #7 | Power County | 10 | 0 | $0 | 1996–2014 |
| #8 | Twin Falls County | 9 | 0 | $5K | 1996–2014 |
| #9 | Clearwater County | 9 | 0 | $1.5M | 2011–2018 |
| #10 | Valley County | 8 | 0 | $0 | 1996–2024 |
| #11 | Kootenai County | 8 | 0 | $0 | 1998–2015 |
| #12 | Cassia County | 8 | 0 | $0 | 1996–2014 |
| #13 | Bonneville County | 8 | 0 | $0 | 1996–2014 |
| #14 | Adams County | 8 | 0 | $0 | 2012–2024 |
| #15 | Lemhi County | 8 | 0 | $0 | 2004–2014 |
| #16 | Latah County | 5 | 0 | $63K | 2003–2022 |
| #17 | Bingham County | 5 | 0 | $0 | 1996–2014 |
| #18 | Madison County | 5 | 0 | $0 | 1996–2014 |
| #19 | Lewis County | 5 | 0 | $70K | 2010–2010 |
| #20 | Nez Perce County | 4 | 0 | $100 | 1996–2015 |
| #21 | Washington County | 4 | 0 | $0 | 2023–2023 |
| #22 | Bonner County | 4 | 0 | $0 | 1996–2022 |
| #23 | Caribou County | 3 | 0 | $0 | 1996–2014 |
| #24 | Lincoln County | 3 | 0 | $0 | 1996–2014 |
| #25 | Oneida County | 3 | 1 | $0 | 1997–2014 |
Significant events
Deadliest heavy rain events in Idaho
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| Aug 13, 1997 | Oneida County | — | 1 | 0 |