Centereach weather in July

In July, Centereach sees average daytime highs of 77°F and overnight lows near 71°F, with 3.2 in of rain across 8.8 wet days and about 14.6 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 77°F through the month. The sky is clear or mostly clear about 38% of the time in July, and the air most often feels muggy.

Daylight stretches from about 14 h 54 min at the start of July to 14 h 12 min by month's end. Set against the rest of the year, July is Centereach's 4th-clearest and 11th-windiest month. For the whole year in context, see Centereach's year-round climate.

Daytime high
77°
1st warmest
Overnight low
71°
12th coldest
Rainfall
3.2 in
8.8 wet days
Daylight
14 h 42 min
4:38 AM – 7:18 PM
Cloud cover
53%
4th clearest
Wind
9 mph
11th windiest
Solar energy
6.45 kWh/m²
Travel score
7.2
out of 10

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

Density
1,397/km²
people per km²

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 77°F through the month.

A typical July day in Centereach reaches about 77°F in the afternoon and slips back to 71°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 81°F. Set against its neighbours, July runs about 6°F warmer than June and on par with August.

60°70°80°151015202531
Avg high (°F)Avg low (°F)
17569
27569
37569
47569
57670
67670
77670
87670
97670
107670
117671
127771
137771
147771
157771
167771
177771
187771
197771
207771
217771
227772
237772
247772
257772
267772
277772
287772
297772
307772
317772

How July really feels in Centereach

Once humidity and wind are folded in, July 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

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

Centereach weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 31°3.79.949.40.0
Feb39° / 30°3.49.33.710.40.0
Mar44° / 36°4.410.22.811.70.8
Apr52° / 44°3.610.50.413.12.7
May61° / 53°3.310.2014.24.9
Jun70° / 64°3.49.6014.96.6
Jul77° / 71°3.28.8014.67.2
Aug76° / 70°3.89.4013.67.2
Sep71° / 65°3.78.9012.36.9
Oct62° / 55°4.38.9010.95.5
Nov53° / 45°3.68.80.39.73.1
Dec45° / 37°4.610.32.39.11.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 19% of July, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35545
45545
55545
65545
75743
85743
95743
105842
115842
125842
135842
145842
155842
165842
175842
185743
195743
205644
215644
225644
235644
245644
255644
265644
275743
285644
295743
305743
315842

Chance of precipitation in July

Any precipitation

Centereach gets around 3.2 in of rain over 8.8 wet days in July, the driest month. 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 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
428
528
628
728
827
927
1027
1127
1227
1327
1427
1527
1628
1728
1828
1929
2029
2129
2230
2330
2430
2530
2630
2730
2830
2931
3031
3131

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
15123242100
24123142110
34113042130
44112942140
54112942150
64112842160
73102842170
83102741180
93102641200
102102541210
112102541220
122102441230
132102341250
141102240260
151102240271
161102140281
171102039291
181102039301
191101939301
201101938311
211101938321
220101838331
230101837331
240101837341
250101837341
261101836351
271101836351
281101836351
291101935341
301101935351
311101935341

Wind in July

Winds average 9 mph in July.

Across July, 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 July

DaylightNight

Daylight runs from about 14 h 54 min at the start of July to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:29 AM to 4:51 AM, and sunset from 7:23 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.94:297:23
214.94:297:23
314.94:307:23
414.94:307:22
514.94:317:22
614.84:317:22
714.84:327:22
814.84:337:21
914.84:337:21
1014.84:347:21
1114.84:347:20
1214.74:357:20
1314.74:367:19
1414.74:377:19
1514.74:377:18
1614.74:387:18
1714.64:397:17
1814.64:407:17
1914.64:417:16
2014.64:417:15
2114.54:427:15
2214.54:437:14
2314.54:447:13
2414.54:457:12
2514.44:467:11
2614.44:477:11
2714.44:487:10
2814.34:487:09
2914.34:497:08
3014.34:507:07
3114.24:517:06

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.45 kWh/m².

For context, solar energy here swings from a low near 1.75 kWh/m² to a high of 6.48 kWh/m² in June across the year — July's 6.45 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.4Intense
196.4Intense
206.4Intense
216.3Intense
226.3Intense
236.3Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in July

Hazard calendar for Centereach

In seasonPeak

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

Centereach 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 July a good time to visit Centereach?

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

7.2
Sightseeing
1st-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Centereach in July

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

In July, Centereach sees daytime highs around 77°F and nights near 71°F. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Centereach in July

The nearest coast averages about 72°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 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 3 to Sep 23 — about 2.7 months when the water holds above 68°F.

40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan43Bracing
Feb40Bracing
Mar40Bracing
Apr45Bracing
May54Bracing
Jun64Cool
Jul72Refreshing
Aug73Refreshing
Sep70Refreshing
Oct63Cool
Nov55Bracing
Dec49Bracing

UV index in Centereach in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Centereach 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 Centereach in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Centereach 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 Centereach?

Centereach sits at 40.9°N, 73.1°W, 98 ft above sea level, in United States. The nearest listed city is Lake Ronkonkoma, 2.5 mi away.

Topography around Centereach

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

Within 2 miles, the terrain around Centereach has only modest variations in elevation — a maximum elevation change of 184 ft around an average of 121 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 1,401 ft.

The land around Centereach is covered by trees (68%) within 2 miles, trees (58%) within 10 miles, and water (51%) and trees (37%) within 50 miles.

2 miles
184 ft
10 miles
338 ft
50 miles
1,401 ft
treesgrasslandartificial surfaceswaterwetland
July weather nearby: Lake Ronkonkoma 2.5 mi · Holbrook 3.1 mi · Selden 3.1 mi · Ronkonkoma 3.7 mi · Farmingville 4.3 mi · Holtsville 4.3 mi · Setauket-East Setauket 5.0 mi · Coram 5.0 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 Centereach (40.8584°, -73.0995°, elevation 98 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).