MEDIAN FLOW RATE · 1 YEAR
—cfs
No flow data available
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
20.5in
≈ normal
20.52 in of precipitation so far this year — about average for this point in the season (normal 23.06 in).
YTD Total
20.5in
This year so far
Normal to Date
23.1in
30-yr average
Typical Range
18.4–29.2in
10th–90th pct YTD
Departure
-11%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.68" · normal 3.34" (2.0–5.0)
Feb: 1.89" · normal 3.01" (1.6–5.0)
Mar: 4.25" · normal 4.19" (2.2–6.5)
Apr: 2.38" · normal 3.72" (2.1–5.8)
May: 3.21" · normal 3.68" (1.7–5.4)
Jun: 3.34" · normal 4.30" (2.3–7.5)
Jul: 2.79" (so far)· normal 4.35" (2.2–6.7)
Aug: normal 4.14" (1.3–7.2)
Sep: normal 4.28" (1.3–7.0)
Oct: normal 3.78" (1.6–6.0)
Nov: normal 3.04" (1.3–4.6)
Dec: normal 3.97" (1.9–5.8)
Baseline 1991–2020 · Source: Open-Meteo09:49 AM
Your History · South Branch Raritan River at South Branch NJ
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Station Location
40.5469, -74.6964Loading map…
DATA · USGS · NOAA · NWS
Site #01398102·USGS
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