Mastic weather in August

In August, Mastic sees average daytime highs of 76°F and overnight lows near 70°F, with 3.7 in of rain across 9.3 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 76°F through the month. The sky is clear or mostly clear about 41% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Mastic's 1st-clearest and 12th-windiest month. For the whole year in context, see Mastic's year-round climate.

Daytime high
76°
2nd warmest
Overnight low
70°
11th coldest
Rainfall
3.7 in
9.3 wet days
Daylight
13 h 36 min
5:06 AM – 6:45 PM
Cloud cover
50%
1st clearest
Wind
9 mph
12th windiest
Solar energy
5.76 kWh/m²
Travel score
7.2
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 August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 76°F through the month.

A typical August day in Mastic reaches about 76°F in the afternoon and slips back to 70°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 80°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

60°70°80°151015202531
Avg high (°F)Avg low (°F)
17772
27772
37772
47771
57771
67771
77771
87771
97771
107771
117771
127671
137671
147671
157671
167671
177670
187670
197670
207670
217670
227670
237570
247570
257569
267569
277569
287569
297569
307469
317469

How August really feels in Mastic

Once humidity and wind are folded in, August 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

August 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 August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66040
76040
85941
95941
105941
115842
125743
135743
145743
155743
165743
175743
185743
195842
205842
215842
226040
236040
246040
256139
266139
276139
286238
296139
306139
316139

Chance of precipitation in August

Any precipitation

Mastic gets around 3.7 in of rain over 9.3 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
530
631
731
832
933
1033
1134
1234
1334
1434
1534
1634
1733
1833
1932
2031
2131
2230
2329
2428
2527
2626
2726
2825
2925
3025
3125

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 60% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1192034350
22102034350
32102034340
42102034340
52102034340
62102034330
72102134331
83102134321
93102134311
103102135311
113102235301
123102235291
133102235281
143102236271
153112336271
163112336261
173112336251
183122436241
193122436241
203132436231
213142535220
224142535220
234152634210
244162633200
255172733190
265172732190
275182731180
286182731170
296192830170
307192730170
318192730160

Wind in August

Winds average 9 mph in August, the calmest month.

Across August, daily wind ranges from about 9 mph on the calmest days to 10 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
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 4:51 AM to 5:21 AM, and sunset from 7:03 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:517:03
214.24:527:02
314.14:537:01
414.14:547:00
514.14:556:59
614.04:566:58
714.04:576:57
814.04:586:55
913.94:596:54
1013.95:006:53
1113.85:016:52
1213.85:026:50
1313.85:036:49
1413.75:046:47
1513.75:056:46
1613.65:066:45
1713.65:076:43
1813.65:086:42
1913.55:096:40
2013.55:106:39
2113.45:116:37
2213.45:126:36
2313.35:136:34
2413.35:146:33
2513.35:156:31
2613.25:166:29
2713.25:176:28
2813.15:186:26
2913.15:196:25
3013.05:206:23
3113.05:216:21

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.76 kWh/m².

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 — August's 5.76 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.0Intense
76.0Intense
86.0Bright
95.9Bright
105.9Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.7Bright
165.7Bright
175.7Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in August

Hazard calendar for Mastic

In seasonPeak

In August, 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 August a good time to visit Mastic?

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

7.2
Sightseeing
1st-best month of the year
6.2
Beach & pool
2nd-best month of the year

August is one of the better times to visit Mastic for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mastic in August

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

In August, Mastic sees daytime highs around 76°F and nights near 70°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Mastic in August

The nearest coast averages about 73°F in August — 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 August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — 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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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
August 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).