St. Lawrence County is under a freeze warning tonight as temperatures will dip into the lower 30s and possibly upper 20s, according to the National Weather Service (NWS).

The warning is in effect from 1 until 9 a.m. overnight when sub-freeing temps will be experienced, forecasters say. Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold, NWS says. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above-ground pipes to protect them from freezing.

The high today will be near 56 with winds 13-15 mph, NWS says.

Highs on Monday will near 60, the service says.

The forecast through next Saturday is as follows:

Monday

Areas of frost before 9am. Otherwise, sunny, with a high near 59. Northeast wind 3 to 8 mph.

Monday Night

Patchy frost after 1am. Otherwise, mostly clear, with a low around 32. Light southeast wind.

Tuesday

Areas of frost before 9am. Otherwise, sunny, with a high near 63. Light and variable wind.

Tuesday Night

Mostly clear, with a low around 43. Light south wind.

Wednesday

Sunny, with a high near 69. West wind 3 to 7 mph.

Wednesday Night

Partly cloudy, with a low around 51. South wind 5 to 7 mph.

Thursday

Mostly sunny, with a high near 70. Southwest wind 8 to 11 mph.

Thursday Night

A 40 percent chance of showers. Mostly cloudy, with a low around 52. South wind around 8 mph.

Friday

A 30 percent chance of showers. Mostly cloudy, with a high near 54. West wind 9 to 14 mph.

Friday Night

Mostly cloudy, with a low around 37. West wind around 11 mph.

Saturday

Partly sunny, with a high near 49. West wind 10 to 14 mph.