MEDIAN FLOW RATE · 30 DAY
50cfs 42.6% vs avg
Optimal band: 63–85 cfs
PERIOD HIGH
279cfs
PERIOD LOW
50cfs
RUNNABLE
45%
last 30 day in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
18.8in
≈ normal
18.8 in of precipitation so far this year — about average for this point in the season (normal 21.26 in).
YTD Total
18.8in
This year so far
Normal to Date
21.3in
30-yr average
Typical Range
16.2–25.0in
10th–90th pct YTD
Departure
-12%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.63" · normal 3.17" (1.9–4.6)
Feb: 1.61" · normal 3.02" (1.8–4.2)
Mar: 3.38" · normal 4.07" (2.0–6.2)
Apr: 2.79" · normal 3.70" (1.9–6.0)
May: 4.26" · normal 3.18" (1.4–4.9)
Jun: 3.17" · normal 3.57" (1.7–5.4)
Jul: 0.97" (so far)· normal 3.28" (1.9–4.7)
Aug: normal 3.43" (1.6–5.3)
Sep: normal 3.53" (1.3–6.4)
Oct: normal 3.96" (1.3–6.8)
Nov: normal 3.40" (1.6–4.9)
Dec: normal 4.11" (2.3–5.8)
Baseline 1991–2020 · Source: Open-Meteo10:02 AM
Your History · SOUHEGAN RIVER AT MERRIMACK, NH
Track your history
Sign in to track your sessions at SOUHEGAN RIVER AT MERRIMACK, NH — best days, monthly trends, and time on the water.
Sign inSPONSORED
Station Location
42.8576, -71.5062Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:00 UTC
Site #01094000·USGS
Create a free account to save favorites, set flow alerts, and track conditions