MEDIAN FLOW RATE · 1 YEAR
—cfs
No flow data available
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
20.1in
≈ normal
20.15 in of precipitation so far this year — about average for this point in the season (normal 20.8 in).
YTD Total
20.1in
This year so far
Normal to Date
20.8in
30-yr average
Typical Range
16.4–25.8in
10th–90th pct YTD
Departure
-3%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 3.10" · normal 3.09" (1.8–4.3)
Feb: 2.86" · normal 2.86" (1.6–4.7)
Mar: 3.19" · normal 3.92" (1.9–5.4)
Apr: 3.00" · normal 3.41" (1.8–4.5)
May: 3.93" · normal 3.82" (1.9–5.9)
Jun: 4.06" · normal 3.60" (1.9–5.9)
Jul: 0.00" (so far)· normal 4.22" (1.8–6.5)
Aug: normal 3.86" (1.7–6.5)
Sep: normal 4.61" (1.3–8.0)
Oct: normal 3.47" (1.2–5.8)
Nov: normal 3.05" (1.1–6.3)
Dec: normal 3.48" (1.9–5.4)
Baseline 1991–2020 · Source: Open-Meteo09:33 PM
Your History · LONG BRANCH BELOW GUINEA ROAD NR FAIRFAX, VA
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Weather Conditions
WEATHER CONDITIONS
TODAY
94°
71°
THU
101°
76°
FRI
105°
76°
SAT
101°
74°
SUN
100°
71°
MON
85°
71°
TUE
84°
70°
FISH INDEX
Temperature
Too Hot
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:47 AM
SUNSET
08:38 PM
14H 51M OF DAYLIGHT20H 18M REMAINING
MOON PHASE
Waning Gibbous
96% illuminated
Station Location
38.8205, -77.2604Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-02 00:20 UTC
Site #01654250·USGS
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