A frost advisory is in effect for St. Lawrence County from 1 to 8 a.m. Friday morning, according to the National Weather Service (NWS).

Frost could kill sensitive outdoor vegetation if left uncovered, NWS says. The coldest temps will be just prior to sunrise Friday morning. People should take steps now to protect tender plants from the cold.

Skies will be sunny today and highs will reach near 62 with 5-10 mph winds, the service says. Patchy frost and lows in the mid-3os are expected overnight.

Friday will start out cool for May, but warm to around 68 by mid-afternoon, forecasters said.

The extended forecast through Wednesday is as follows:

Friday

Patchy frost before 7am. Otherwise, sunny, with a high near 68. Light and variable wind becoming northwest 5 to 7 mph in the morning.

Friday Night

Mostly clear, with a low around 45. Calm wind becoming south 5 to 7 mph in the evening.

Saturday

Sunny, with a high near 75. West wind around 7 mph.

Saturday Night

Mostly clear, with a low around 51. South wind around 6 mph.

Sunday

Sunny, with a high near 80. Southwest wind around 7 mph.

Sunday Night

Mostly clear, with a low around 54. South wind around 5 mph.

Memorial Day

Sunny, with a high near 82. Southwest wind around 5 mph becoming northwest in the afternoon.

Monday Night

Mostly clear, with a low around 57. Southeast wind 3 to 5 mph.

Tuesday

Sunny, with a high near 85. East wind 3 to 7 mph.

Tuesday Night

Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming calm in the evening.

Wednesday

Mostly sunny, with a high near 86. West wind 3 to 6 mph.