Mastic weather in June

In June, Mastic sees average daytime highs of 70°F and overnight lows near 64°F, with 3.3 in of rain across 8.8 wet days and about 14.9 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 66°F in the first days to 74°F by the end. The sky is clear or mostly clear about 34% of the time in June, and the air most often feels humid.

Daylight stretches from about 14 h 42 min at the start of June to 14 h 54 min by month's end. Set against the rest of the year, June is Mastic's 6th-clearest and 10th-windiest month. For the whole year in context, see Mastic's year-round climate.

Daytime high
70°
4th warmest
Overnight low
64°
9th coldest
Rainfall
3.3 in
8.8 wet days
Daylight
14 h 54 min
4:24 AM – 7:19 PM
Cloud cover
58%
6th clearest
Wind
10 mph
10th windiest
Solar energy
6.55 kWh/m²
Travel score
6.7
out of 10

Mastic is census-designated place in Suffolk County, New York, United States.

Density
1,481/km²
people per km²

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 66°F in the first days to 74°F by the end.

A typical June day in Mastic reaches about 70°F in the afternoon and slips back to 64°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 75°F. Set against its neighbours, June runs about 10°F warmer than May and about 7°F cooler than July.

50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
16559
26659
36659
46660
56760
66760
76761
86761
96861
106862
116862
126962
136963
146963
157063
167064
177064
187164
197165
207165
217265
227266
237266
247367
257367
267367
277367
287468
297468
307468

How June really feels in Mastic

Once humidity and wind are folded in, June 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

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

Mastic weather by month

How June compares with the rest of the year at a glance. June is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 31°3.79.83.99.40.0
Feb40° / 31°3.49.13.510.40.0
Mar44° / 36°4.410.22.811.70.8
Apr52° / 45°3.610.30.413.12.7
May60° / 53°3.310.2014.24.8
Jun70° / 64°3.38.8014.96.7
Jul76° / 71°3.08.6014.67.2
Aug76° / 70°3.79.3013.67.2
Sep71° / 65°3.78.8012.36.9
Oct62° / 55°4.39010.95.5
Nov53° / 46°3.68.70.39.73.2
Dec45° / 37°4.610.62.29.11.1

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 15% of June, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24852
34852
44852
54852
64852
74951
84852
94753
104753
114753
124654
134753
144654
154753
164654
174753
184753
194753
204852
214753
224852
234852
245050
255050
265149
275248
285248
295347
305446

Chance of precipitation in June

Any precipitation

Mastic gets around 3.3 in of rain over 8.8 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
330
429
530
630
730
830
930
1030
1130
1230
1329
1429
1529
1629
1729
1829
1929
2028
2128
2228
2328
2428
2528
2628
2728
2828
2927
3027

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the humid band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
145321930
243332140
341332240
439332440
537332550
635332660
733332760
831332870
929333080
1027333190
11253332100
12233333110
13213235120
14183236140
15173137150
16153038170
17132939190
18122839210
19112639230
20102539261
2192439281
2282239301
2372138322
2462038342
2561837363
2651736374
2751635395
2851534406
2951433418
3051332429

Wind in June

Winds average 10 mph in June.

Across June, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 42 min at the start of June to 14 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 4:28 AM to 4:27 AM, and sunset from 7:10 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:287:10
214.74:277:11
314.74:277:11
414.84:277:12
514.84:267:13
614.84:267:13
714.84:267:14
814.84:257:15
914.84:257:15
1014.94:257:16
1114.94:257:17
1214.94:257:17
1314.94:247:18
1414.94:247:18
1514.94:247:18
1614.94:247:19
1714.94:247:19
1814.94:247:20
1914.94:257:20
2014.94:257:20
2114.94:257:21
2214.94:257:21
2314.94:257:21
2414.94:257:21
2514.94:267:21
2614.94:267:21
2714.94:267:22
2814.94:277:22
2914.94:277:22
3014.94:277:22

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 6.55 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 6.55 kWh/m² in June across the year — June's 6.55 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.6Intense
186.6Intense
196.6Intense
206.6Intense
216.6Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.8Intense
296.8Intense
306.8Intense
Planning a trip in June

Hazard calendar for Mastic

In seasonPeak

In June, Mastic sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Mastic 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 June a good time to visit Mastic?

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

6.7
Sightseeing
4th-best month of the year
4.1
Beach & pool
4th-best month of the year

June is a reasonable time to visit Mastic for sightseeing.

What to pack for Mastic in June

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

In June, Mastic sees daytime highs around 70°F and nights near 64°F. Pack sun protection. Worth having: rain gear. About 9 days see rain.

sun protectionrain gear

Sea temperature near Mastic in June

The nearest coast averages about 64°F in June — 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 73°F and coldest in February near 40°F.

It's comfortable for a long swim from Jul 4 to Sep 22 — about 2.7 months when the water holds above 68°F.

40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan44Bracing
Feb40Bracing
Mar41Bracing
Apr45Bracing
May53Bracing
Jun64Cool
Jul71Refreshing
Aug73Refreshing
Sep69Refreshing
Oct63Cool
Nov56Bracing
Dec49Bracing

UV index in Mastic in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mastic 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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery 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 Mastic in June

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Mastic is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1016 µg/m³Nov 178 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar14Moderate
Apr15Moderate
May16Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct9Good
Nov8Good
Dec8Good
Location & terrain

Where is Mastic?

Mastic sits at 40.8°N, 72.8°W, 30 ft above sea level, in United States. The nearest listed city is Shirley, 1.2 mi away.

Topography around Mastic

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

Within 2 miles, the terrain around Mastic has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 46 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 328 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 965 ft.

The land around Mastic is covered by trees (63%) within 2 miles, trees (46%) and water (36%) within 10 miles, and water (59%) and trees (32%) within 50 miles.

2 miles
98 ft
10 miles
328 ft
50 miles
965 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
June weather nearby: Shirley 1.2 mi · Medford 8.7 mi · East Patchogue 8.7 mi · Coram 9.3 mi · Farmingville 9.9 mi · Holtsville 11 mi · Selden 11 mi · Holbrook 12 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 Mastic (40.802°, -72.8409°, elevation 30 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).