Sunny and warm Father's Day on Long Island before soaking rain and thunderstorms arrive Monday
Long Island enjoys pleasant summer weather through Sunday, but a storm system will bring periods of heavy rain and thunderstorms Monday into Monday night before sunshine returns for the middle of the week.
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What to Expect
The remainder of the weekend will be ideal across Long Island, with comfortable humidity, seasonable temperatures, and plenty of sunshine. While an isolated shower or thunderstorm can't be ruled out late Sunday afternoon, most locations will remain dry.
A much wetter pattern develops Monday as a strong storm system moves into the region. Widespread rain, periods of heavy downpours, and thunderstorms are expected Monday afternoon through Monday night. Rainfall totals of 1" to 2" are likely in many locations, with locally higher amounts possible. Urban and poor-drainage flooding may develop where the heaviest rain falls, especially during the afternoon and evening.
Conditions improve Tuesday afternoon with sunshine returning for the middle of the week before another chance for showers arrives late Thursday into Friday.
Long Island Forecast
Overnight:
Mostly clear and comfortably cool, with overnight temperatures falling into the low to mid-60s. Winds will gradually diminish through the evening, making for another pleasant night with low humidity and excellent sleeping weather.
Sunday:
Mostly sunny and warm, with afternoon temperatures reaching the low to mid-80s, with slightly cooler readings along the South Shore and East End. Humidity remains comfortable, making it a great day for beaches, boating, parks and outdoor events. While an isolated afternoon shower or thunderstorm is possible, the vast majority of Long Island will stay dry.
Sunday Night:
Partly cloudy and mild. with overnight temperatures settling into the mid-60s. Quiet weather continues through the night as clouds gradually increase ahead of Monday's approaching storm system.
Monday:
Clouds increase, with showers developing, becoming widespread during the afternoon. Periods of heavy rain and scattered thunderstorms are expected as temperatures reach the upper 70s to low 80s. Rainfall totals of 1" to 2" are likely, with locally higher amounts possible. Localized street flooding and ponding on roadways may develop during heavier downpours, so allow extra travel time if you'll be on the roads Monday afternoon or evening.
Monday Night:
Rain continues through much of the evening with additional heavy downpours and embedded thunderstorms possible before gradually tapering late at night. Overnight temperatures remain in the mid- to upper 60s. Localized flooding remains possible in areas that receive repeated heavy rainfall.
Tuesday:
Any lingering morning showers gradually end, followed by increasing sunshine during the afternoon. Temperatures climb into the upper 70s to low 80s with noticeably more comfortable humidity. It will become a pleasant day for outdoor activities after the morning rain moves out.
Wednesday:
Sunny and seasonably warm, with temperatures in the low to mid-80s. Comfortable humidity, light winds and abundant sunshine will make this one of the nicest days of the week for beaches, boating, golf and outdoor recreation.
Thursday:
Mostly sunny through much of the day, with temperatures around 80 before clouds increase during the afternoon. A few scattered showers may develop later in the day, but many locations will remain dry until evening.
Friday:
Partly sunny, with a chance of scattered showers. High temperatures will reach the low to mid-80s. While periods of dry weather are expected, it's a good idea to keep an umbrella handy if you'll be outdoors.
Saturday:
Mostly sunny and warm, with temperatures in the low to mid-80s. Comfortable humidity and plenty of sunshine will make for another excellent summer day across Long Island.
