MEDIAN FLOW RATE · 1 YEAR
205cfs 21.4% vs avg
Optimal band: 203–275 cfs
PERIOD HIGH
3,221cfs
PERIOD LOW
32cfs
RUNNABLE
11%
last 1 year in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
24.5in
≈ normal
24.46 in of precipitation so far this year — about average for this point in the season (normal 23.34 in).
YTD Total
24.5in
This year so far
Normal to Date
23.3in
30-yr average
Typical Range
18.0–27.3in
10th–90th pct YTD
Departure
+5%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.58" · normal 3.01" (1.6–4.8)
Feb: 1.13" · normal 2.72" (1.5–3.9)
Mar: 3.43" · normal 3.34" (1.9–4.5)
Apr: 4.50" · normal 3.91" (2.5–6.2)
May: 5.53" · normal 4.37" (2.3–6.2)
Jun: 6.84" · normal 4.86" (2.6–7.3)
Jul: 0.46" (so far)· normal 4.60" (3.1–6.2)
Aug: normal 4.00" (2.8–5.7)
Sep: normal 3.60" (2.4–4.9)
Oct: normal 4.56" (2.1–7.1)
Nov: normal 3.53" (2.4–4.8)
Dec: normal 3.75" (2.4–5.1)
Baseline 1991–2020 · Source: Open-Meteo10:29 PM
Your History · UPPER AMMONOOSUC RIVER NEAR GROVETON, NH
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Station Location
44.6251, -71.4690Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-08 00:00 UTC
Site #01130000·USGS
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