Bel Air South weather in May

In May, Bel Air South sees average daytime highs of 72°F and overnight lows near 57°F, with 3.4 in of rain across 10.7 wet days and about 14.1 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 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Bel Air South's 11th-clearest and 8th-windiest month. For the whole year in context, see Bel Air South's year-round climate.

Daytime high
72°
5th warmest
Overnight low
57°
8th coldest
Rainfall
3.4 in
10.7 wet days
Daylight
14 h 12 min
4:57 AM – 7:06 PM
Cloud cover
62%
11th clearest
Wind
7 mph
8th windiest
Solar energy
5.69 kWh/m²
Travel score
6.5
out of 10

Bel Air South is census-designated place in Harford County, Maryland, United States.

Density
1,169/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 Bel Air South reaches about 72°F in the afternoon and slips back to 57°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 61°F and 82°F. Set against its neighbours, May runs about 9°F warmer than April and about 9°F cooler than June.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16752
26852
36853
46853
56853
66954
76954
86954
96955
107055
117055
127055
137156
147156
157156
167156
177257
187257
197257
207358
217358
227358
237459
247459
257460
267560
277560
287661
297661
307661
317662

How May really feels in Bel Air South

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.

Bel Air South 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° / 29°3.18.63.19.50.1
Feb43° / 30°2.88.93.210.40.5
Mar51° / 37°4.010.42.111.72.5
Apr63° / 47°3.510.40.2135.3
May72° / 57°3.410.7014.16.5
Jun81° / 66°3.410.5014.76.2
Jul85° / 71°3.611.1014.55.2
Aug83° / 69°3.59.6013.66.0
Sep76° / 62°4.49.2012.37.0
Oct65° / 51°3.68.30116.2
Nov54° / 41°3.07.60.29.83.5
Dec45° / 33°3.78.91.79.31.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34456
44555
54555
64555
74555
84456
94456
104456
114357
124357
134357
144357
154357
164357
174456
184456
194456
204357
214456
224456
234456
244555
254654
264654
274654
284654
294555
304555
314555

Chance of precipitation in May

Any precipitation

Bel Air South gets around 3.4 in of rain over 10.7 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 34% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
234
333
433
533
633
734
834
934
1034
1135
1235
1335
1435
1535
1635
1735
1835
1935
2035
2135
2235
2335
2435
2534
2634
2734
2834
2934
3033
3133

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
17616710
27517710
37317820
47118920
57118920
669181030
769181030
866191140
966191140
1064191250
1164191250
1263181360
1363181360
1461191370
1559191480
1659191480
1757191590
18561915100
19541916101
20531916111
21502017121
22482018131
23462018142
24452019152
25432019152
26422019163
27402120173
28392120173
29382120183
30372121193
31352121194

Wind in May

Winds average 7 mph in May.

Across May, 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.

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
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 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 60 minutes over May. Sunrise moves from 5:13 AM to 4:46 AM, and sunset from 6:52 PM to 7:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:136:52
213.75:126:53
313.75:116:54
413.85:096:55
513.85:086:56
613.85:076:57
713.95:066:58
813.95:056:59
913.95:047:00
1014.05:037:01
1114.05:027:02
1214.05:017:03
1314.14:597:04
1414.14:597:05
1514.14:587:05
1614.24:577:06
1714.24:567:07
1814.24:557:08
1914.34:547:09
2014.34:537:10
2114.34:527:11
2214.34:527:12
2314.44:517:13
2414.44:507:14
2514.44:497:14
2614.44:497:15
2714.54:487:16
2814.54:487:17
2914.54:477:18
3014.54:477:19
3114.64:467:19

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.69 kWh/m².

For context, solar energy here swings from a low near 1.88 kWh/m² to a high of 6.09 kWh/m² in June across the year — May's 5.69 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Bel Air South

In seasonPeak

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

Bel Air South 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 May a good time to visit Bel Air South?

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

6.5
Sightseeing
2nd-best month of the year
4.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit Bel Air South for sightseeing.

What to pack for Bel Air South in May

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

In May, Bel Air South sees daytime highs around 72°F and nights near 57°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Bel Air South in May

The nearest coast averages about 58°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 mi away) is warmest in August at about 78°F and coldest in February near 36°F.

It's comfortable for a long swim from Jun 16 to Oct 5 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov53Bracing
Dec44Bracing

UV index in Bel Air South 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 Bel Air South peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Bel Air South 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 Bel Air South is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1417 µg/m³Nov 138 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Bel Air South?

Bel Air South sits at 39.5°N, 76.3°W, 325 ft above sea level, in United States. The nearest listed city is South Bel Air, 1.9 mi away.

Topography around Bel Air South

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

Within 2 miles, the terrain around Bel Air South has only modest variations in elevation — a maximum elevation change of 384 ft around an average of 292 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 689 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,388 ft.

The land around Bel Air South is covered by trees (71%) within 2 miles, trees (60%) and grassland (21%) within 10 miles, and trees (46%) and cropland (21%) within 50 miles.

2 miles
384 ft
10 miles
689 ft
50 miles
1,388 ft
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: South Bel Air 1.9 mi · North Bel Air 3.1 mi · Bel Air North 4.3 mi · Edgewood 6.2 mi · Aberdeen 8.1 mi · Perry Hall 9.9 mi · Carney 13 mi · Middle River 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 Bel Air South (39.5051°, -76.3198°, elevation 325 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).