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National Safe Boating Week: May 16-22, 2026

Current conditions at

Watertown, Watertown International Airport (KART)

Lat: 43.99° N Lon: 76.02° W Elev: 325 ft.

Fair

57°F

14°C

Humidity	36%
Wind Speed	NE 15 G 21 mph
Barometer	30.42 in (1030.3 mb)
Dewpoint	30°F (-1°C)
Visibility	10.00 mi
Last update	22 May 9:56 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Jefferson County

Rest Of Today

Partly to mostly sunny. Highs in the upper 60s. Northeast winds 10 mph or less.

Tonight

Mostly cloudy and not as cool with lows in the upper 40s. Northeast winds 5 to 10 mph, becoming light.

Saturday

Mostly cloudy. Rain likely in the afternoon. Highs ranging from the upper 50s on the tug hill to the mid 60s across the lower elevations. East winds 10 mph or less, becoming southeast. Chance of rain 60 percent.

Saturday Night

Showers. Lows ranging from the mid 40s across the tug hill to the upper 40s along the lake ontario shore. Southeast winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Sunday

Showers. Highs ranging from around 60 inland to the mid 60s along the lake ontario shore. Southeast winds 10 to 20 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Sunday Night

Mostly cloudy with a 50 percent chance of showers. Lows in the lower 50s.

Memorial Day

Mostly cloudy with a 50 percent chance of showers. Highs around 70.

Monday Night

Mostly cloudy. Lows around 50.

Tuesday

Mostly sunny. Highs in the mid 70s.

Tuesday Night

Partly cloudy. Lows in the lower 50s.

Wednesday

Mostly sunny. Highs in the mid 70s.