Waldorf weather in May

In May, Waldorf sees average daytime highs of 74°F and overnight lows near 59°F, with 3.4 in of rain across 10.4 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 71°F in the first days to 78°F by the end. The sky is clear or mostly clear about 27% 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 30 min by month's end. Set against the rest of the year, May is Waldorf's 12th-clearest and 7th-windiest month. For the whole year in context, see Waldorf's year-round climate.

Daytime high
74°
5th warmest
Overnight low
59°
8th coldest
Rainfall
3.4 in
10.4 wet days
Daylight
14 h 06 min
5:01 AM – 7:07 PM
Cloud cover
61%
12th clearest
Wind
6 mph
7th windiest
Solar energy
5.76 kWh/m²
Travel score
6.7
out of 10

Waldorf is census designated place in Charles County, Maryland, United States.

Density
717/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 71°F in the first days to 78°F by the end.

A typical May day in Waldorf reaches about 74°F in the afternoon and slips back to 59°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 85°F. Set against its neighbours, May runs about 8°F warmer than April and about 8°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17055
27055
37155
47156
57156
67156
77256
87257
97257
107257
117357
127358
137358
147358
157359
167459
177459
187460
197560
207560
217561
227661
237661
247662
257762
267762
277763
287863
297864
307864
317964

How May really feels in Waldorf

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.

Waldorf weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan44° / 31°3.08.72.79.60.7
Feb47° / 32°2.88.42.210.51.4
Mar55° / 39°3.910.11.511.73.5
Apr66° / 50°3.39.40136.0
May74° / 59°3.410.4014.16.7
Jun83° / 68°3.510.9014.65.7
Jul87° / 73°3.812014.44.6
Aug85° / 71°3.710.2013.55.4
Sep78° / 64°4.19.2012.36.9
Oct67° / 53°3.47.70116.6
Nov56° / 42°2.97.40.19.94.2
Dec48° / 35°3.38.71.29.41.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44456
54456
64555
74555
84555
94555
104555
114555
124456
134555
144555
154654
164555
174555
184555
194456
204357
214357
224357
234456
244357
254357
264456
274456
284456
294555
304555
314456

Chance of precipitation in May

Any precipitation

Waldorf gets around 3.4 in of rain over 10.4 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 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
433
533
633
733
834
934
1034
1134
1234
1334
1434
1534
1634
1734
1834
1934
2034
2134
2234
2334
2434
2534
2633
2733
2833
2933
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 49% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
169181120
268181220
366191320
465191420
564191520
661201630
761201630
860201730
958201840
1057201850
1156201950
1255201960
1353202070
1453202070
1552202080
1651202090
17492021100
18482021110
19462021121
20442022131
21432022151
22412022161
23392022172
24372023182
25352023202
26332123213
27322123223
28302123233
29282124234
30272124244
31252124255

Wind in May

Winds average 6 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
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 30 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 5:17 AM to 4:51 AM, and sunset from 6:53 PM to 7:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:176:53
213.65:166:54
313.75:156:55
413.75:146:56
513.75:126:57
613.85:116:57
713.85:106:58
813.85:096:59
913.95:087:00
1013.95:077:01
1113.95:067:02
1214.05:057:03
1314.05:047:04
1414.05:037:05
1514.15:027:06
1614.15:017:07
1714.15:007:08
1814.24:597:09
1914.24:597:10
2014.24:587:10
2114.24:577:11
2214.34:567:12
2314.34:567:13
2414.34:557:14
2514.34:547:15
2614.44:547:15
2714.44:537:16
2814.44:527:17
2914.44:527:18
3014.54:517:19
3114.54:517:19

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.76 kWh/m².

For context, solar energy here swings from a low near 2 kWh/m² to a high of 6.15 kWh/m² in June across the year — May's 5.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
316.0Bright
Planning a trip in May

Hazard calendar for Waldorf

In seasonPeak

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

Waldorf 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 Waldorf?

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

6.7
Sightseeing
2nd-best month of the year
5.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Waldorf for sightseeing.

What to pack for Waldorf in May

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

In May, Waldorf sees daytime highs around 74°F and nights near 59°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Waldorf in May

The nearest coast averages about 57°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 30 mi away) is warmest in August at about 78°F and coldest in February near 37°F.

It's comfortable for a long swim from Jun 16 to Oct 6 — 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
Feb37Bracing
Mar40Bracing
Apr47Bracing
May57Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Waldorf in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Waldorf peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 11UV 9Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Waldorf 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 Waldorf is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar12Good
Apr13Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Waldorf?

Waldorf sits at 38.6°N, 76.9°W, 210 ft above sea level, in United States. The nearest listed city is St. Charles, 1.2 mi away.

Topography around Waldorf

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

Within 2 miles, the terrain around Waldorf has only modest variations in elevation — a maximum elevation change of 121 ft around an average of 217 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 328 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,539 ft.

The land around Waldorf is covered by trees (60%) and artificial surfaces (26%) within 2 miles, trees (76%) within 10 miles, and trees (60%) and water (20%) within 50 miles.

2 miles
121 ft
10 miles
328 ft
50 miles
1,539 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: St. Charles 1.2 mi · Saint Charles 1.2 mi · Fort Washington 7.5 mi · Fort Hunt 9.9 mi · Clinton 9.9 mi · Hybla Valley 12 mi · Oxon Hill-Glassmanor 12 mi · Woodlawn 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 Waldorf (38.6246°, -76.9391°, elevation 210 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).