Hillsborough weather in April

In April, Hillsborough sees average daytime highs of 62°F and overnight lows near 43°F, with 3.7 in of precipitation across 10.7 wet days and about 13 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 57°F in the first days to 66°F by the end. The sky is clear or mostly clear about 26% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 42 min by month's end. Set against the rest of the year, April is Hillsborough's 11th-clearest and 4th-windiest month. For the whole year in context, see Hillsborough's year-round climate.

Daytime high
62°
7th warmest
Overnight low
43°
6th coldest
Precipitation
3.7 in
10.7 wet days
Daylight
13 h 06 min
5:27 AM – 6:31 PM
Cloud cover
63%
11th clearest
Wind
7 mph
4th windiest
Solar energy
5 kWh/m²
Travel score
5.0
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 57°F in the first days to 66°F by the end.

A typical April day in Hillsborough reaches about 62°F in the afternoon and slips back to 43°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 49°F and 75°F. Set against its neighbours, April runs about 12°F warmer than March and about 10°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
15639
25639
35739
45740
55840
65840
75941
85941
95941
106042
116042
126142
136143
146243
156243
166244
176344
186344
196345
206445
216445
226446
236446
246546
256546
266547
276647
286647
296648
306648

How April really feels in Hillsborough

Once humidity and wind are folded in, April 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

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

Hillsborough weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 25°3.39.14.39.40.0
Feb42° / 26°3.093.710.40.3
Mar50° / 33°4.210.63.311.72.2
Apr62° / 43°3.710.70.4135.0
May71° / 53°3.611.7014.26.3
Jun81° / 62°4.311.5014.86.0
Jul85° / 68°4.211.3014.65.0
Aug83° / 66°4.010.4013.65.8
Sep76° / 59°4.19.2012.36.9
Oct65° / 47°3.78.60.110.96.0
Nov53° / 38°3.07.90.59.73.2
Dec44° / 30°4.09.62.69.20.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24159
34159
44159
54159
64159
74258
84258
94258
104258
114258
124258
134159
144159
154159
164060
174060
184060
194060
203961
214060
224060
234060
244060
254159
264060
274159
284159
294159
304258

Chance of precipitation in April

Any precipitationSnow

Hillsborough gets around 3.7 in of rain and snow over 10.7 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 36% and peaks near 37% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1374
2373
3373
4373
5373
6373
7373
8372
9372
10362
11362
12362
13362
14362
15361
16371
17371
18361
19361
20361
21360
22350
23350
24350
25350
26350
27350
28360
29360
30360

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19910
29910
39820
49820
59820
69820
79820
89820
99631
109631
119631
129631
139541
149541
159541
169541
179451
189352
199352
209352
219352
229352
239262
249262
259262
269172
279073
288983
298893
308893

Wind in April

Winds average 7 mph in April.

Across April, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17light breeze
27light breeze
37light breeze
47light breeze
57light breeze
67light breeze
77light breeze
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over April. Sunrise moves from 5:51 AM to 5:06 AM, and sunset from 6:15 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:516:15
212.45:496:16
312.55:486:17
412.55:466:18
512.65:446:19
612.65:436:20
712.75:416:21
812.75:396:23
912.85:386:24
1012.85:366:25
1112.95:356:26
1212.95:336:27
1312.95:316:28
1413.05:306:29
1513.05:286:30
1613.15:276:31
1713.15:256:32
1813.25:236:33
1913.25:226:34
2013.25:206:35
2113.35:196:36
2213.35:176:37
2313.45:166:38
2413.45:146:39
2513.55:136:40
2613.55:126:41
2713.55:106:43
2813.65:096:44
2913.65:076:45
3013.75:066:46

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5 kWh/m².

For context, solar energy here swings from a low near 1.77 kWh/m² to a high of 5.99 kWh/m² in June across the year — April's 5 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.6Bright
44.6Bright
54.7Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Hillsborough

In seasonPeak

None of Hillsborough's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Hillsborough 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 April a good time to visit Hillsborough?

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

5.0
Sightseeing
6th-best month of the year
1.1
Beach & pool
7th-best month of the year

April is a reasonable time to visit Hillsborough for sightseeing.

What to pack for Hillsborough in April

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

In April, Hillsborough sees daytime highs around 62°F and nights near 43°F. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Hillsborough in April

The nearest coast averages about 46°F in April — 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 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 Hillsborough in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Hillsborough 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 Hillsborough in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Hillsborough 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 Hillsborough?

Hillsborough sits at 40.5°N, 74.6°W, 85 ft above sea level, in United States. The nearest listed city is Somerset, 7.5 mi away.

Topography around Hillsborough

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

Within 2 miles, the terrain around Hillsborough has only modest variations in elevation — a maximum elevation change of 161 ft around an average of 105 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 Hillsborough is covered by trees (56%) and grassland (29%) within 2 miles, trees (64%) and grassland (22%) within 10 miles, and trees (61%) within 50 miles.

2 miles
161 ft
10 miles
673 ft
50 miles
1,962 ft
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Somerset 7.5 mi · North Brunswick 8.1 mi · Bridgewater 8.7 mi · Princeton 9.3 mi · New Brunswick 9.3 mi · Warren Township 11 mi · East Brunswick 12 mi · Edison 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 Hillsborough (40.4776°, -74.6268°, elevation 85 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).