MEDIAN FLOW RATE · 30 DAY
2,692cfs 10.3% vs avg
Optimal band: 4,825–6,527 cfs
PERIOD HIGH
8,888cfs
PERIOD LOW
2,692cfs
RUNNABLE
26%
last 30 day in band
Gauge Height
42.35ft
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
20.6in
≈ normal
20.63 in of precipitation so far this year — about average for this point in the season (normal 21.74 in).
YTD Total
20.6in
This year so far
Normal to Date
21.7in
30-yr average
Typical Range
16.1–25.9in
10th–90th pct YTD
Departure
-5%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.85" · normal 3.19" (1.8–4.5)
Feb: 1.84" · normal 3.03" (1.7–4.3)
Mar: 3.55" · normal 4.12" (2.3–6.3)
Apr: 2.65" · normal 3.75" (2.1–5.8)
May: 4.09" · normal 3.09" (1.4–4.7)
Jun: 3.94" · normal 3.46" (1.3–5.6)
Jul: 1.71" (so far)· normal 3.19" (1.9–4.9)
Aug: normal 3.45" (1.6–5.1)
Sep: normal 3.50" (1.4–6.7)
Oct: normal 3.92" (1.2–6.6)
Nov: normal 3.44" (1.6–4.9)
Dec: normal 4.06" (2.5–5.8)
Baseline 1991–2020 · Source: Open-Meteo23:43 UTC
Your History · MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA
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Station Location
42.6459, -71.2984Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-12 00:00 UTC
Site #01100000·USGS
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