Greater Upper Marlboro weather in August

In August, Greater Upper Marlboro sees average daytime highs of 85°F and overnight lows near 71°F, with 4.0 in of rain across 10.6 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 83°F by the end. The sky is clear or mostly clear about 32% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Greater Upper Marlboro's 4th-clearest and 11th-windiest month. For the whole year in context, see Greater Upper Marlboro's year-round climate.

Daytime high
85°
2nd warmest
Overnight low
71°
11th coldest
Rainfall
4.0 in
10.6 wet days
Daylight
13 h 30 min
5:25 AM – 6:57 PM
Cloud cover
57%
4th clearest
Wind
5 mph
11th windiest
Solar energy
5.39 kWh/m²
Travel score
5.3
out of 10

Greater Upper Marlboro is census designated place in Maryland until 2010.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 86°F in the first days to 83°F by the end.

A typical August day in Greater Upper Marlboro reaches about 85°F in the afternoon and slips back to 71°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 92°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18672
28672
38672
48672
58672
68672
78672
88571
98571
108571
118571
128571
138571
148571
158571
168571
178571
188471
198470
208470
218470
228470
238470
248470
258470
268369
278369
288369
298369
308369
318369

How August really feels in Greater Upper Marlboro

Once humidity and wind are folded in, August 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

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

Greater Upper Marlboro weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan44° / 30°3.18.62.69.60.7
Feb46° / 31°2.98.62.410.51.4
Mar55° / 38°4.010.31.511.73.4
Apr66° / 49°3.4100.1135.9
May74° / 58°3.710.7014.16.6
Jun83° / 67°3.711014.75.7
Jul87° / 72°4.312.3014.44.5
Aug85° / 71°4.010.6013.55.3
Sep78° / 64°4.39.1012.36.9
Oct67° / 52°3.57.90116.6
Nov56° / 42°2.97.60.19.94.2
Dec47° / 35°3.58.81.29.31.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45347
55347
65248
75248
85248
95248
105248
115248
125248
135248
145248
155248
165347
175446
185446
195446
205446
215545
225545
235446
245545
255545
265446
275545
285446
295446
305446
315347

Chance of precipitation in August

Any precipitation

Greater Upper Marlboro gets around 4.0 in of rain over 10.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
438
538
638
738
838
938
1038
1138
1238
1338
1437
1537
1637
1736
1836
1935
2034
2134
2233
2332
2431
2531
2630
2730
2830
2930
3030
3130

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1271636381
2281636371
3281636371
4381635361
5381635361
6391735361
7391734362
8391734352
9391734352
10491734352
11491734342
12491834342
13491834342
144101834332
154101934322
164101934322
173112034311
183112034301
193112134301
203122134291
213122234281
223122234281
233122334271
243132333271
254132433261
264132432261
274132531251
285142530251
295142630251
306142629241
316142628241

Wind in August

Winds average 5 mph in August.

Across August, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 hours at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 5:12 AM to 5:39 AM, and sunset from 7:15 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:127:15
214.05:127:14
314.05:137:12
414.05:147:11
513.95:157:10
613.95:167:09
713.95:177:08
813.85:187:07
913.85:197:06
1013.75:207:05
1113.75:217:03
1213.75:227:02
1313.65:227:01
1413.65:237:00
1513.65:246:58
1613.55:256:57
1713.55:266:56
1813.55:276:54
1913.45:286:53
2013.45:296:51
2113.35:306:50
2213.35:316:49
2313.35:326:47
2413.25:336:46
2513.25:346:44
2613.15:356:43
2713.15:356:41
2813.15:366:40
2913.05:376:38
3013.05:386:36
3112.95:396:35

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.39 kWh/m².

For context, solar energy here swings from a low near 1.98 kWh/m² to a high of 6.16 kWh/m² in June across the year — August's 5.39 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.2Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.1Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Hazard calendar for Greater Upper Marlboro

In seasonPeak

In August, Greater Upper Marlboro sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Greater Upper Marlboro 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 August a good time to visit Greater Upper Marlboro?

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

5.3
Sightseeing
6th-best month of the year
6.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Greater Upper Marlboro for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Greater Upper Marlboro in August

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

In August, Greater Upper Marlboro sees daytime highs around 85°F and nights near 71°F. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Greater Upper Marlboro in August

The nearest coast averages about 78°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 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
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Greater Upper Marlboro in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Greater Upper Marlboro 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 Greater Upper Marlboro in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Greater Upper Marlboro is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Greater Upper Marlboro?

Greater Upper Marlboro sits at 38.8°N, 76.7°W, 79 ft above sea level, in United States. The nearest listed city is Bowie, 7.5 mi away.

Topography around Greater Upper Marlboro

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

Within 2 miles, the terrain around Greater Upper Marlboro has only modest variations in elevation — a maximum elevation change of 276 ft around an average of 115 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 341 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,434 ft.

The land around Greater Upper Marlboro is covered by trees (75%) within 2 miles, trees (68%) within 10 miles, and trees (55%) and water (21%) within 50 miles.

2 miles
276 ft
10 miles
341 ft
50 miles
1,434 ft
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Bowie 7.5 mi · Camp Springs 8.7 mi · Clinton 9.3 mi · Suitland 9.3 mi · Suitland-Silver Hill 9.3 mi · Landover 11 mi · Lanham-Seabrook 11 mi · Seabrook 11 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 Greater Upper Marlboro (38.8314°, -76.7483°, elevation 79 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).