Brightwaters climate

Brightwaters Weather in May

NOAA 1991-2020 normals for Islip Li Macarthur AP, 16.1 km from Brightwaters

Average highs run from 64°F on May 1 to 73°F on May 31, and lows from 46°F to 56°F. Normal precipitation for the month is 3.28 in over about 12 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Brightwaters, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
68°F
Average low
51°F
Precipitation
3.28 in
Record high
93°FMay 31, 2022
Record low
34°FMay 1, 2008
Chance of a freeze
3%
Daylight
13 h 57 min to 14 h 52 min
Cloud cover
61%
Humidity
83%
Dew point
52°F
Wind
10.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 164°F46°F82°F 201034°F 200838%0%
May 264°F47°F85°F 200139°F 200538%0%
May 365°F47°F85°F 200140°F 200538%0%
May 465°F47°F89°F 200139°F 200538%0%
May 565°F47°F85°F 200038°F 200338%0%
May 666°F48°F86°F 200040°F 201138%0%
May 766°F48°F87°F 200038°F 200137%0%
May 866°F48°F86°F 200041°F 200137%0%
May 966°F49°F85°F 200035°F 202037%0%
May 1067°F49°F80°F 200140°F 202037%0%
May 1167°F49°F82°F 200140°F 201037%0%
May 1267°F50°F85°F 201542°F 201937%0%
May 1368°F50°F82°F 200441°F 202037%0%
May 1468°F50°F76°F 201040°F 202037%0%
May 1568°F50°F80°F 202043°F 201337%0%
May 1668°F51°F79°F 200442°F 201637%0%
May 1769°F51°F82°F 202644°F 200337%0%
May 1869°F51°F87°F 201740°F 200337%0%
May 1969°F52°F89°F 201738°F 200237%0%
May 2069°F52°F92°F 202639°F 200237%0%
May 2170°F52°F90°F 202241°F 200237%0%
May 2270°F53°F91°F 202144°F 200236%0%
May 2370°F53°F90°F 202144°F 200636%0%
May 2471°F53°F82°F 200244°F 200636%0%
May 2571°F54°F87°F 200744°F 201336%0%
May 2671°F54°F92°F 201047°F 201336%0%
May 2771°F54°F85°F 201444°F 201336%0%
May 2872°F55°F83°F 201249°F 202136%0%
May 2972°F55°F82°F 201248°F 200035%0%
May 3072°F55°F88°F 201347°F 200435%0%
May 3173°F56°F93°F 202244°F 202635%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Brightwaters, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 5:52 AM, sunset 7:49 PM
May 31
sunrise 5:25 AM, sunset 8:17 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00004781 (Islip Li Macarthur AP), public domain. Records: NOAA GHCN-Daily, station USW00054787, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.