Rivermatics

USGS Streamgage 13210045

Boise River near Middleton, ID

Boise River near Middleton, ID is USGS streamgage 13210045 in Idaho, monitoring river discharge in hydrologic subbasin 17050114. Discharge records at this site go back to 2023. Typical flow runs near 285.6 cfs in July and 2,944.7 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

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Gauge details

State
Idaho
Subbasin (HUC-8)
17050114
Coordinates
43.68176, -116.55871
USGS site number
13210045
Records begin
2023-09-05 (3 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Boise River near Middleton, ID. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
204 220 235
194 218 242
185 215 247
173 210 244
167 209 250
166 210 259
163 211 267
161 211 274
161 213 286
160 214 297
155 211 293
151 209 294
150 210 302
145 207 301

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 3 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January — 358.3 —
February — 383.7 —
March — 1,199.4 —
April — 2,944.7 —
May — 1,100.5 —
June — 943.4 —
July — 285.6 —
August — 240.7 —
September — 259 —
October — 304.8 —
November — 337.4 —
December — 346.2 —

All values in cubic feet per second (cfs).

Common questions

When does Boise River near Middleton, ID normally run highest?
April, on the long-term record. The median daily flow that month is about 2,944.7 cfs, against 240.7 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has Boise River near Middleton, ID been measured?
Discharge records at USGS site 13210045 begin in 2023, about 3 years, covering roughly 1,066 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Boise River near Middleton, ID?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Boise River near Middleton, ID?
The gauge sits at 43.68176, -116.55871, in Idaho, in hydrologic subbasin 17050114.
Can I use Boise River near Middleton, ID data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Other gauges in this subbasin