Princeton weather in June

In June, Princeton sees average daytime highs of 81°F and overnight lows near 63°F, with 4.0 in of rain across 10.8 wet days and about 14.8 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 78°F in the first days to 84°F by the end. The sky is clear or mostly clear about 24% of the time in June, and the air most often feels dry.

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 Princeton's 11th-clearest and 10th-windiest month. For the whole year in context, see Princeton's year-round climate.

Daytime high
81°
3rd warmest
Overnight low
63°
10th coldest
Rainfall
4.0 in
10.8 wet days
Daylight
14 h 54 min
4:33 AM – 7:25 PM
Cloud cover
63%
11th clearest
Wind
6 mph
10th windiest
Solar energy
6.01 kWh/m²
Travel score
6.0
out of 10

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 78°F in the first days to 84°F by the end.

A typical June day in Princeton reaches about 81°F in the afternoon and slips back to 63°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 91°F. Set against its neighbours, June runs about 9°F warmer than May and about 5°F cooler than July.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
17759
27860
37860
47860
57860
67961
77961
87961
98062
108062
118062
128062
138163
148163
158163
168164
178264
188264
198264
208265
218365
228365
238365
248366
258466
268466
278467
288467
298567
308567

How June really feels in Princeton

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.

Princeton weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 27°3.39.33.89.50.0
Feb43° / 28°3.08.83.410.40.5
Mar51° / 35°4.210.32.611.72.5
Apr63° / 45°3.610.60.3135.2
May72° / 54°3.511.4014.26.4
Jun81° / 63°4.010.8014.86.0
Jul86° / 69°4.211.3014.64.9
Aug84° / 67°4.010.4013.65.6
Sep77° / 60°4.09.2012.36.9
Oct65° / 49°3.68.40.110.96.2
Nov54° / 39°2.97.80.39.83.5
Dec45° / 31°4.09.41.99.21.0

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 20% of June, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34357
44258
54258
64258
74060
84060
94060
104060
114060
124060
134159
144159
154258
164357
174357
184357
194357
204456
214456
224555
234654
244654
254753
264753
274753
284852
294852
304951

Chance of precipitation in June

Any precipitation

Princeton gets around 4.0 in of rain over 10.8 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 36% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
335
435
535
635
735
835
936
1036
1136
1236
1336
1437
1537
1637
1737
1837
1937
2037
2136
2236
2336
2436
2536
2636
2736
2835
2935
3035

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the dry band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1452021131
2442021131
3432022141
4422022141
5412022152
6412022162
7402022162
8392022172
9382122173
10362122183
11352122194
12332122204
13322123204
14302123214
15282124225
16272125235
17252125235
18242126246
19232126246
20212126257
21202127257
22192127268
23182127268
24172028278
25162028279
26152028289
271420272810
281420272811
291420262911
301419262912

Wind in June

Winds average 6 mph in June.

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

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 4:36 AM to 4:36 AM, and sunset from 7:16 PM to 7:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:367:16
214.74:367:17
314.74:367:17
414.74:357:18
514.74:357:19
614.74:357:19
714.84:347:20
814.84:347:21
914.84:347:21
1014.84:347:22
1114.84:337:22
1214.84:337:23
1314.84:337:23
1414.84:337:24
1514.94:337:24
1614.94:337:25
1714.94:337:25
1814.94:337:25
1914.94:337:26
2014.94:337:26
2114.94:347:26
2214.94:347:27
2314.94:347:27
2414.94:347:27
2514.94:347:27
2614.94:357:27
2714.94:357:27
2814.94:357:27
2914.94:367:27
3014.94:367:27

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 6.01 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.8 kWh/m² to a high of 6.01 kWh/m² in June across the year — June's 6.01 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Bright
156.0Bright
166.0Bright
176.0Intense
186.0Intense
196.0Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in June

Hazard calendar for Princeton

In seasonPeak

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

Princeton 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 Princeton?

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

6.0
Sightseeing
4th-best month of the year
6.4
Beach & pool
3rd-best month of the year

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

What to pack for Princeton in June

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

In June, Princeton sees daytime highs around 81°F and nights near 63°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

Sea temperature near Princeton in June

The nearest coast averages about 65°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 41 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 27 — about 3 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
Oct64Cool
Nov55Bracing
Dec49Bracing

UV index in Princeton 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 Princeton peaks around July 11 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 8Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Princeton 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 Princeton is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1518 µg/m³Nov 149 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May16Moderate
Jun17Moderate
Jul18Moderate
Aug15Moderate
Sep13Moderate
Oct10Good
Nov9Good
Dec10Good
Location & terrain

Where is Princeton?

Princeton sits at 40.3°N, 74.7°W, 203 ft above sea level, in United States. The nearest listed city is Mercerville-Hamilton Square, 8.1 mi away.

Topography around Princeton

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

Within 2 miles, the terrain around Princeton has only modest variations in elevation — a maximum elevation change of 377 ft around an average of 157 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 673 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,962 ft.

The land around Princeton is covered by trees (74%) within 2 miles, trees (65%) within 10 miles, and trees (60%) within 50 miles.

2 miles
377 ft
10 miles
673 ft
50 miles
1,962 ft
treesgrasslandcroplandartificial surfaceswater
June weather nearby: Mercerville-Hamilton Square 8.1 mi · Hillsborough 9.3 mi · Ewing 9.3 mi · Trenton 9.9 mi · North Brunswick 12 mi · Somerset 14 mi · East Brunswick 14 mi · New Brunswick 14 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 Princeton (40.3487°, -74.659°, elevation 203 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).