Willow Grove weather in May

In May, Willow Grove sees average daytime highs of 72°F and overnight lows near 54°F, with 3.6 in of rain across 12 wet days and about 14.2 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 68°F in the first days to 76°F by the end. The sky is clear or mostly clear about 24% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Willow Grove's 12th-clearest and 8th-windiest month. For the whole year in context, see Willow Grove's year-round climate.

Daytime high
72°
5th warmest
Overnight low
54°
8th coldest
Rainfall
3.6 in
12 wet days
Daylight
14 h 12 min
4:50 AM – 7:03 PM
Cloud cover
64%
12th clearest
Wind
7 mph
8th windiest
Solar energy
5.63 kWh/m²
Travel score
6.3
out of 10

Willow Grove is census-designated place in Pennsylvania, USA.

Density
1,657/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 68°F in the first days to 76°F by the end.

A typical May day in Willow Grove reaches about 72°F in the afternoon and slips back to 54°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 84°F. Set against its neighbours, May runs about 9°F warmer than April and about 9°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16749
26849
36850
46850
56850
66951
76951
86951
96951
107052
117052
127052
137153
147153
157153
167153
177254
187254
197354
207355
217355
227455
237456
247456
257556
267557
277657
287658
297658
307658
317759

How May really feels in Willow Grove

Once humidity and wind are folded in, May 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

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

Willow Grove weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 26°3.39.249.50.0
Feb42° / 27°3.093.410.40.4
Mar51° / 34°4.210.82.911.72.4
Apr62° / 44°3.7110.3135.1
May72° / 54°3.612014.26.3
Jun81° / 63°4.211.2014.86.0
Jul85° / 68°4.311.5014.65.0
Aug83° / 67°4.110.2013.65.7
Sep77° / 60°4.29.4012.36.9
Oct65° / 48°3.78.80.110.96.1
Nov54° / 38°3.08.10.49.83.4
Dec44° / 31°4.09.32.29.20.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64357
74456
84456
94357
104357
114357
124357
134357
144258
154357
164456
174456
184357
194357
204357
214357
224357
234357
244456
254456
264456
274456
284456
294456
304456
314258

Chance of precipitation in May

Any precipitation

Willow Grove gets around 3.6 in of rain over 12 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
637
737
837
938
1038
1138
1238
1338
1438
1538
1639
1739
1839
1939
2039
2140
2240
2340
2439
2539
2639
2739
2839
2939
3039
3138

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 67% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
18511400
28511400
38312500
48312500
58113600
68013610
77814710
87814710
97714810
107614910
117614910
1274141020
1374141020
1473141120
1571151130
1670151230
1769151240
1867161340
1966161350
2063171460
2162171560
2260181570
2358181680
2456181790
2554191791
26521918101
27511919101
28501920101
29491920111
30482021111
31472021121

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 42 min at the start of May to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 5:07 AM to 4:39 AM, and sunset from 6:48 PM to 7:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:076:48
213.75:066:49
313.85:056:50
413.85:036:51
513.85:026:52
613.95:016:53
713.95:006:54
813.94:596:55
914.04:586:56
1014.04:566:57
1114.04:556:58
1214.14:546:59
1314.14:537:00
1414.14:527:01
1514.24:517:02
1614.24:507:03
1714.24:497:04
1814.34:487:05
1914.34:487:06
2014.34:477:07
2114.44:467:08
2214.44:457:09
2314.44:447:10
2414.44:447:11
2514.54:437:11
2614.54:427:12
2714.54:427:13
2814.54:417:14
2914.64:407:15
3014.64:407:16
3114.64:397:16

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.63 kWh/m².

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 — May's 5.63 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.9Bright
315.9Bright
Planning a trip in May

Is May a good time to visit Willow Grove?

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

6.3
Sightseeing
2nd-best month of the year
4.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Willow Grove for sightseeing.

What to pack for Willow Grove in May

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

In May, Willow Grove sees daytime highs around 72°F and nights near 54°F. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Willow Grove in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Willow Grove peaks around July 10 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 8Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Willow Grove in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Willow Grove 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 Willow Grove?

Willow Grove sits at 40.1°N, 75.1°W, 269 ft above sea level, in United States. The nearest listed city is Abington, 1.9 mi away.

Topography around Willow Grove

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

Within 2 miles, the terrain around Willow Grove has only modest variations in elevation — a maximum elevation change of 289 ft around an average of 295 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 666 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,864 ft.

The land around Willow Grove is covered by trees (69%) and artificial surfaces (20%) within 2 miles, trees (61%) and artificial surfaces (22%) within 10 miles, and trees (65%) within 50 miles.

2 miles
289 ft
10 miles
666 ft
50 miles
1,864 ft
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Abington 1.9 mi · Fox Chase 5.0 mi · Somerton 5.6 mi · West Oak Lane 5.6 mi · Bustleton 6.2 mi · Rhawnhurst 6.2 mi · Lawndale 6.8 mi · East Mount Airy 6.8 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 Willow Grove (40.144°, -75.1157°, elevation 269 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. 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).