East Setauket weather in May

In May, East Setauket sees average daytime highs of 63°F and overnight lows near 53°F, with 3.5 in of rain across 10.8 wet days and about 14.3 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 58°F in the first days to 67°F by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of May to 14 h 42 min by month's end. Set against the rest of the year, May is East Setauket's 12th-clearest and 9th-windiest month. For the whole year in context, see East Setauket's year-round climate.

Daytime high
63°
5th warmest
Overnight low
53°
7th coldest
Rainfall
3.5 in
10.8 wet days
Daylight
14 h 18 min
4:40 AM – 6:57 PM
Cloud cover
62%
12th clearest
Wind
9 mph
9th windiest
Solar energy
5.87 kWh/m²
Travel score
5.3
out of 10

East Setauket is human settlement in Suffolk County, New York, United States of America.

Density
1,080/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 58°F in the first days to 67°F by the end.

A typical May day in East Setauket reaches about 63°F in the afternoon and slips back to 53°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 70°F. Set against its neighbours, May runs about 10°F warmer than April and about 10°F cooler than June.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
15849
25849
35849
45949
55950
65950
76050
86051
96051
106051
116152
126152
136152
146252
156253
166253
176353
186354
196354
206454
216455
226455
236555
246556
256556
266657
276657
286757
296758
306758
316858

How May really feels in East Setauket

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

East Setauket weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 29°3.79.74.29.40.0
Feb38° / 29°3.49.13.810.40.0
Mar44° / 35°4.610.63.311.70.7
Apr53° / 44°3.910.70.413.13.0
May63° / 53°3.510.8014.35.3
Jun72° / 64°3.69.7014.96.7
Jul78° / 70°3.29.2014.66.9
Aug78° / 70°4.09.5013.67.0
Sep72° / 64°3.89.1012.36.9
Oct62° / 54°4.49.40.110.95.5
Nov53° / 44°3.79.10.39.73.0
Dec44° / 35°4.810.62.49.10.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44555
54555
64555
74456
84456
94555
104456
114456
124456
134456
144456
154357
164456
174456
184456
194357
204456
214456
224456
234555
244555
254654
264654
274753
284753
294753
304753
314753

Chance of precipitation in May

Any precipitation

East Setauket gets around 3.5 in of rain over 10.8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
436
536
636
736
836
936
1036
1135
1235
1335
1435
1535
1635
1735
1835
1935
2035
2134
2234
2334
2434
2533
2633
2733
2833
2933
3033
3133

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197300
297300
396400
495500
594510
693610
792710
891810
990910
1090910
11891010
12871120
13861220
14841330
15831430
16811540
17801640
18781750
19761860
20741970
21702181
22682291
236623101
246424111
256224131
265925142
275726152
285527162
295228182
305028193
314829203

Wind in May

Winds average 9 mph in May.

Across May, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 42 min at the start of May to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 4:58 AM to 4:29 AM, and sunset from 6:41 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.74:586:41
213.84:566:43
313.84:556:44
413.84:546:45
513.94:536:46
613.94:516:47
714.04:506:48
814.04:496:49
914.04:486:50
1014.14:476:51
1114.14:456:52
1214.14:446:53
1314.24:436:54
1414.24:426:55
1514.24:416:56
1614.34:406:57
1714.34:396:58
1814.34:386:59
1914.44:377:00
2014.44:377:01
2114.44:367:02
2214.54:357:03
2314.54:347:04
2414.54:337:05
2514.54:337:06
2614.64:327:06
2714.64:317:07
2814.64:317:08
2914.64:307:09
3014.74:307:10
3114.74:297:11

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.87 kWh/m².

For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 6.34 kWh/m² in June across the year — May's 5.87 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
216.0Bright
226.0Bright
236.0Intense
246.0Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in May

Hazard calendar for East Setauket

In seasonPeak

None of East Setauket's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

East Setauket sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit East Setauket?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.3
Sightseeing
6th-best month of the year
1.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit East Setauket for sightseeing.

What to pack for East Setauket in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, East Setauket sees daytime highs around 63°F and nights near 53°F. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near East Setauket in May

The nearest coast averages about 54°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 12 mi away) is warmest in August at about 74°F and coldest in February near 35°F.

It's comfortable for a long swim from Jul 1 to Sep 30 — about 3 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb35Bracing
Mar37Bracing
Apr44Bracing
May54Bracing
Jun65Cool
Jul72Refreshing
Aug74Refreshing
Sep71Refreshing
Oct64Cool
Nov55Bracing
Dec46Bracing

UV index in East Setauket in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in East Setauket peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in East Setauket in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in East Setauket is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1120 µg/m³Nov 188 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr16Moderate
May19Moderate
Jun20Moderate
Jul20Moderate
Aug17Moderate
Sep13Moderate
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is East Setauket?

East Setauket sits at 40.9°N, 73.1°W, 66 ft above sea level, in United States. The nearest listed city is Setauket-East Setauket, 0.6 mi away.

Topography around East Setauket

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of East Setauket.

Within 2 miles, the terrain around East Setauket has only modest variations in elevation — a maximum elevation change of 230 ft around an average of 82 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 338 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,457 ft.

The land around East Setauket is covered by trees (68%) within 2 miles, water (50%) and trees (39%) within 10 miles, and water (47%) and trees (41%) within 50 miles.

2 miles
230 ft
10 miles
338 ft
50 miles
1,457 ft
treesgrasslandartificial surfaceswaterwetland
May weather nearby: Setauket-East Setauket 0.6 mi · Centereach 5.6 mi · Selden 6.2 mi · Coram 7.5 mi · Lake Ronkonkoma 7.5 mi · Smithtown 7.5 mi · Ronkonkoma 8.7 mi · Farmingville 8.7 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for East Setauket (40.9415°, -73.1059°, elevation 66 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).