Islip source photograph

Weather · August

Islip weather in August

Average highs of 81°F, lows of 66°F and 4.2 in of rain, from 30 years of weather records.

August is Islip’s 2nd warmest month, with average highs of 81°F and lows of 66°F. That is 1° cooler than July, and 20° above the yearly average high.

Average high
81°F
Average low
66°F
Precipitation
4.2 in
Wet days
9
Sunrise · sunset
6:02 AM · 7:52 PM

August across the year

  1. 39°25°Jan
  2. 41°26°Feb
  3. 48°32°Mar
  4. 58°41°Apr
  5. 68°51°May
  6. 77°61°Jun
  7. 83°67°Jul
  8. 81°66°Aug
  9. 75°59°Sep
  10. 64°47°Oct
  11. 54°38°Nov
  12. 44°30°Dec

High and low Rain

What to wear in August

  • Warm days: shorts and T-shirts.
  • Pack an umbrella or rain jacket: rain or snow falls on about 9 days this month.

August is good for

Around Islip

Bay Shore Cinema, Main St, Bay Shore NY 1979, Islip
Bay Shore Cinema, Main St, Bay Shore NYDowntowngal · CC BY-SA 4.0
Great South Bay Bridge, Islip
Great South Bay BridgeVincent · CC BY 2.0
the Robert Moses Water tower with Roundabout and water, Islip
Picture of the Robert Moses Water tower with Roundabout and water photoNynerds · CC BY-SA 4.0

See Islip

A look around town before you go.

Heckscher State Park, East Islip, NY, US - Part 1 video thumbnail

THINGS TO DO · YOUTUBE SHORT

Heckscher State Park, East Islip, NY, US - Part 1

A local activity video shared by OurTrip Videos.

Watch on YouTube ↗

August compared with the months around it

MonthHighLowRain
July83°F67°F3.3 in
August81°F66°F4.2 in
September75°F59°F3.6 in

Planning a trip? See the best time to visit Islip and today’s forecast.

Questions

How hot does it get in Islip in August?

Average highs are 81°F and average lows 66°F, for a daily mean of 74°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Islip in August?

August averages 4.2 in of precipitation over about 9 days with at least 0.01 in. It is the 3rd wettest month of the year.

What time is sunset in Islip in August?

Around mid-August the sun rises about 6:02 AM and sets about 7:52 PM, for roughly 13.8 hours of daylight.

Is August a good time to visit Islip?

The mildest months for visiting are May, July, September. August is warm.

NOAA U.S. Climate Normals 1991–2020, Islip Li Macarthur Ap station (9.7 mi from downtown). Sunrise and sunset are calculated for August 15 at the city’s coordinates.

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