USGS · 016701405

N ANNA RIVER

USGS · 016701405LIVE

N ANNA RIVER AT RT 669 NR MONROVIA, VA

LOUISA COUNTY, VA38.1390°N, -78.0067°W Updated 9 hr ago

FLOW RATE

2cfs

AIR TEMP

73°F

WIND

2mph WNW

FISH INDEX

75SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

2cfs

Optimal band: 8–10 cfs

PERIOD HIGH

255cfs

PERIOD LOW

2cfs

RUNNABLE

20%

last 1 year in band

Precipitation History

Precipitation · YTD

Dry

Drier than normal

2026 to date

13.6in

-31% vs normal

13.61 in of precipitation so far this year, 31% below the 30-year normal of 19.76 in for this point in the season.

YTD Total

13.6in

This year so far

Normal to Date

19.8in

30-yr average

Typical Range

15.8–24.9in

10th–90th pct YTD

Departure

-31%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 2.86" · normal 3.02" (1.7–4.3)

Jan

Feb: 1.72" · normal 2.79" (1.4–4.5)

Feb

Mar: 2.42" · normal 3.83" (1.9–5.6)

Mar

Apr: 1.45" · normal 3.22" (1.6–5.1)

Apr

May: 3.34" · normal 3.31" (1.6–5.7)

May

Jun: 1.83" · normal 3.31" (1.6–5.9)

Jun

Jul: 0.01" (so far)· normal 3.30" (1.5–5.2)

Jul

Aug: normal 3.10" (1.2–4.8)

Aug

Sep: normal 4.33" (1.5–9.0)

Sep

Oct: normal 3.26" (0.8–5.4)

Oct

Nov: normal 3.03" (1.1–5.6)

Nov

Dec: normal 3.38" (1.9–5.2)

Dec

Baseline 1991–2020 · Source: Open-Meteo07:12 AM

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Station Location

38.1390, -78.0067

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DATA · USGS · NOAA · NWSUPDATED 2026-07-03 09:35 UTC

Site #016701405·USGS

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