Randolph weather in August

In August, Randolph sees average daytime highs of 82°F and overnight lows near 66°F, with 4.0 in of rain across 10.8 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 81°F by the end. The sky is clear or mostly clear about 28% of the time in August, and the air most often feels humid.

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 Randolph's 4th-clearest and 12th-windiest month. For the whole year in context, see Randolph's year-round climate.

Daytime high
82°
2nd warmest
Overnight low
66°
11th coldest
Rainfall
4.0 in
10.8 wet days
Daylight
13 h 36 min
5:13 AM – 6:52 PM
Cloud cover
59%
4th clearest
Wind
5 mph
12th windiest
Solar energy
5.16 kWh/m²
Travel score
6.0
out of 10

Randolph is township of New Jersey, United States.

Density
472/km²
people per km²
Founded
1806

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 84°F in the first days to 81°F by the end.

A typical August day in Randolph reaches about 82°F in the afternoon and slips back to 66°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 90°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18467
28467
38467
48467
58467
68367
78367
88367
98367
108367
118366
128366
138366
148266
158266
168266
178266
188265
198265
208265
218265
228265
238165
248165
258164
268164
278164
288164
298164
308064
318063

How August really feels in Randolph

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.

Randolph 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
Jan38° / 24°3.59.24.89.40.0
Feb40° / 25°3.18.6410.40.1
Mar49° / 33°4.310.53.711.71.9
Apr60° / 43°3.811.10.613.14.7
May70° / 52°3.811.7014.26.2
Jun79° / 62°4.311.7014.96.2
Jul84° / 67°4.311014.65.3
Aug82° / 66°4.010.8013.66.0
Sep75° / 58°4.39.4012.36.9
Oct64° / 47°4.09.10.210.95.7
Nov52° / 37°3.280.69.72.9
Dec42° / 29°4.19.73.19.10.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54753
64753
74654
84654
94654
104654
114654
124654
134753
144852
154753
164852
174951
184951
195050
205050
215149
225149
235149
245149
255149
265149
275149
285149
295149
305248
315149

Chance of precipitation in August

Any precipitation

Randolph gets around 4.0 in of rain over 10.8 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 35% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
739
839
939
1039
1140
1240
1340
1439
1539
1638
1738
1837
1936
2035
2134
2232
2331
2430
2529
2628
2727
2827
2927
3026
3126

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11217302813
21317292812
31317292813
41417292813
51417282713
61417282713
71517282713
81517282713
91517282713
101616272812
111616272812
121616272812
131616282911
141716272811
151717282811
161717282711
171717282710
181718282710
19181828279
20181828269
21191927269
22201927258
23212027258
24212026248
25222126237
26232125237
27242225227
28252224217
29262224217
30262323207
31272323207

Wind in August

Winds average 5 mph in August, the calmest month.

Across August, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
266calm
276calm
286calm
296calm
306calm
316calm

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 4:58 AM to 5:28 AM, and sunset from 7:11 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:587:11
214.24:597:09
314.15:007:08
414.15:017:07
514.15:027:06
614.05:037:05
714.05:047:04
814.05:057:02
913.95:067:01
1013.95:077:00
1113.85:086:59
1213.85:096:57
1313.85:106:56
1413.75:116:55
1513.75:126:53
1613.65:136:52
1713.65:146:50
1813.65:156:49
1913.55:166:47
2013.55:176:46
2113.45:186:44
2213.45:196:43
2313.35:206:41
2413.35:216:40
2513.35:226:38
2613.25:236:36
2713.25:246:35
2813.15:256:33
2913.15:266:32
3013.05:276:30
3113.05:286:28

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.16 kWh/m².

For context, solar energy here swings from a low near 1.75 kWh/m² to a high of 5.95 kWh/m² in June across the year — August's 5.16 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.4Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Randolph

In seasonPeak

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

Randolph 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 Randolph?

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

6.0
Sightseeing
4th-best month of the year
6.7
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Randolph for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Randolph in August

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

In August, Randolph sees daytime highs around 82°F and nights near 66°F. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Randolph in August

The nearest coast averages about 74°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 40 mi away) is warmest in August at about 74°F and coldest in February near 40°F.

It's comfortable for a long swim from Jun 30 to Sep 26 — about 2.9 months when the water holds above 68°F.

40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan43Bracing
Feb40Bracing
Mar41Bracing
Apr46Bracing
May55Bracing
Jun65Cool
Jul72Refreshing
Aug74Refreshing
Sep71Refreshing
Oct63Cool
Nov55Bracing
Dec48Bracing

UV index in Randolph 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 Randolph 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 Randolph 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 Randolph is worst in July — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1318 µg/m³Nov 1410 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar16Moderate
Apr16Moderate
May17Moderate
Jun17Moderate
Jul18Moderate
Aug16Moderate
Sep14Moderate
Oct11Good
Nov10Good
Dec12Good
Location & terrain

Where is Randolph?

Randolph sits at 40.8°N, 74.6°W, 978 ft above sea level, in United States. The nearest listed city is Dover, 2.5 mi away.

Topography around Randolph

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

Within 2 miles, the terrain around Randolph has only modest variations in elevation — a maximum elevation change of 509 ft around an average of 945 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,155 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,457 ft.

The land around Randolph is covered by trees (83%) within 2 miles, trees (80%) within 10 miles, and trees (70%) within 50 miles.

2 miles
509 ft
10 miles
1,155 ft
50 miles
2,457 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Dover 2.5 mi · Denville 6.2 mi · Morristown 6.2 mi · Hopatcong Hills 8.1 mi · Parsippany 8.1 mi · Basking Ridge 9.9 mi · Madison 11 mi · Sparta 13 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 Randolph (40.8483°, -74.5815°, elevation 978 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).