A weakening mid-level trough will bring an increase in clouds today along with scattered rain showers and isolated thunderstorms for St. Lawrence County, according to the National Weather Service (NWS).

The best chance for rainfall will be across Northern New York this morning, NWS says. Temperatures will not be as hot as Sunday, but afternoon highs will still reach the low to mid 80s in most sections.

Moderate south to southwest winds are expected today, and will bring a slight increase in humidity levels to the region, the service says.

Showers are likely and thunderstorms are possible before 9 a.m. and then a chance of showers and thunderstorms between 9 a.m. and 2 p.m.

Overnight lows will be near 67 with a 20 percent chance of rain, the service says.

A slow- moving surface cold front and stronger mid-level trough will move into the North Country for Tuesday, with the potential for more widespread shower and thunderstorm activity, NWS says.

Highs Tuesday will be near 78 with a 60 percent chance of showers and thunderstorms in the afternoon.

The forecast through next weekend is as follows:

Tuesday

Showers and thunderstorms likely, mainly between 2pm and 4pm. Mostly cloudy, with a high near 78. West wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

Showers likely, mainly before 8pm. Mostly cloudy, with a low around 58. West wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday

A 30 percent chance of showers after 10am. Mostly cloudy, with a high near 74. West wind 6 to 8 mph. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night

Partly cloudy, with a low around 56. Southwest wind 3 to 7 mph.

Thursday

Sunny, with a high near 81. West wind 3 to 6 mph.

Thursday Night

Mostly clear, with a low around 57. South wind around 6 mph.

Friday

A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Southwest wind 5 to 8 mph.

Friday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Southwest wind around 7 mph.

Saturday

Mostly sunny, with a high near 75. West wind 7 to 9 mph.

Saturday Night

Partly cloudy, with a low around 56. Southwest wind around 6 mph.

Sunday

Mostly sunny, with a high near 78. West wind 6 to 10 mph.