Cooler weather today under partly sunny skies over the North Country will give way to clearer conditions with more seasonal temperatures Sunday, the National Weather Service predicts.

The high temperature today is expected to reach only the mid-70s with calm winds picking up to 5 mph from the southwest.

Lows are predicted to be in the 50s tonight, the NWS says. Winds are expected to subside and skies will be partly cloudy.

Highs return to more normal temperatures Sunday, into the 80s, under sunny skies, with light winds from the west.

Sunday night, skies will become partly cloudy. Lows will only recede to the-60s, and winds will remain light to moderate, forecasters say.

Showers and thunderstorms are expected Monday and Monday night.

The NWS forecast for the St. Lawrence Valley and northwestern Adirondacks:

Today

Partly sunny, with a high near 76. Calm wind becoming southwest around 5 mph in the afternoon.

Tonight

Partly cloudy, with a low around 58. Calm wind.

Sunday

Sunny, with a high near 83. Calm wind becoming west 5 to 9 mph in the afternoon.

Sunday night

Partly cloudy, with a low around 64. Light and variable wind becoming south around 5 mph after midnight.

Monday

Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 84. South wind 5 to 14 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

Showers and thunderstorms likely before 8pm, then a chance of showers. Mostly cloudy, with a low around 61. Southwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday

Mostly sunny, with a high near 77. Northwest wind around 7 mph.

Tuesday Night

Mostly clear, with a low around 55. Northwest wind around 5 mph becoming calm in the evening.

Wednesday

Sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon.

Wednesday Night

Mostly clear, with a low around 61. Southwest wind around 5 mph.

Thursday

Mostly sunny, with a high near 84. Southwest wind 5 to 7 mph.

Thursday Night

Partly cloudy, with a low around 65. Southwest wind 5 to 7 mph.

Friday

Mostly sunny, with a high near 86. Southwest wind 7 to 10 mph.