Long Islanders can look forward to pleasant temperatures Sunday, with highs in the mid-80s but showers and thunderstorms that will threaten much of the coming week could reach us in the morning and continue into the evening.

"Today [Sunday] there could be a passing shower or thunderstorm this morning, then through the day there might be a slight chance into the afternoon and evening," Nelson Vaz, a meteorologist with the National Weather Service in Upton said.

Vaz said a cold front will weaken over the area at night, when lows will be around 70 degrees.

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There may be a soggy commute on Monday, when the chance of showers and thunderstorms increases.

"There'll probably be a better chance than today [Sunday] particularly in the morning -- there could be a shower or thunderstorm around for the morning commute," Vaz said.

Highs Monday will be in the lower to mid-80s. "It'll get warmer as you get toward Nassau County," Vaz said. Lows will be in the low 70s.

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On Tuesday, get ready for muggy conditions, but no rain is in the forecast. "It'll be getting hot and humid," Vaz said. Highs will reach the upper 80s to around 90. Lows again will be in the mid-70s.

"Wednesday also looks dry," Vaz said. Highs will be in the upper 80s to low 90s and lows will be in the lower to mid 70s.

"There'll be increasing humidity Wednesday into Thursday," Vaz said.

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The chance of showers and thunderstorms returns along with high heat and humidity on Thursday. "There'll be a chance of showers and thunderstorms from the afternoon into the evening as a front passes through," Vaz said. Highs will again be in the upper 80s to lower 90s and lows will be in the lower 70s.

Things get better for the start of the weekend on Friday when it will be dry and less humid and highs will be in the mid- to upper 80s. Lows will be in the upper 60s to around 70.

"Friday will be a little more comfortable," Vaz said.