Rainfall totals Idaho
No heavy-rain reports were filed in Idaho in the last 24 hours. The state table below has the year to date totals for 2026.
as of
For normal annual precipitation from NCEI 1991-2020 normals, Boise, Idaho, is the highest placed Idaho city in the ranking, at 134 of 145 tracked cities. Full city precipitation ranking
How much rain did Idaho get?
| City | Year to date | Normal to date | vs normal | Rain days | Last rain |
|---|---|---|---|---|---|
| Boise | 7.86 inches | 8.19 inches | -0.33 inches (-4%) | 48 | 0.04 inches Sep 18, 2026 |
Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA. Averages are 1991-2020 normals from NCEI.
Rainfall records for Idaho
| City | Wettest day | Wettest year | Average year |
|---|---|---|---|
| Boise | 1.91 inches Jun 12, 1958 | 18.77 inches 1983 | 11.85 inches |
Rain questions
How many inches of rain per year does Idaho get?
11.8 inches is the average annual rainfall at Boise, based on 1991-2020 normals.
How do I find past rainfall totals for Idaho?
This page has year-to-date totals and records for each station. Each city page keeps a day-by-day log. For older station history, use the NCEI past weather portal.
Rain events in Idaho
| Dates | Top | Where | States | Reports |
|---|---|---|---|---|
| September 17 to 18, 2026 | 1.22 inches | 1 NW Rexburg, ID | 1 | 43 |
Counties with rain reports in Idaho, 2026
- Bonneville County15 · 0.86 inches
- Caribou County10 · 0.64 inches
- Bannock County9 · 0.62 inches
- Blaine County6 · 0.81 inches
- Custer County6 · 0.59 inches
- Power County5 · 0.70 inches
- Oneida County4 · 0.98 inches
- Madison County3 · 1.22 inches
- Clark County3 · 0.88 inches
- Jefferson County3 · 0.83 inches
- Bingham County3 · 0.58 inches
- Fremont County2 · 0.84 inches
- Franklin County2 · 0.57 inches
- Bear Lake County2 · 0.52 inches
- Butte County1 · 0.97 inches
- Teton County1 · 0.57 inches
- Cassia County1 · 0.35 inches
A county earns a spot here as soon as one report in the period is filed.
Recent days with reports in Idaho
National Weather Service offices file Local Storm Reports; the Iowa Environmental Mesonet of Iowa State University relays them to this page, where they appear as live spotter reports. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.