Greater Upper Marlboro weather in July

In July, Greater Upper Marlboro sees average daytime highs of 87°F and overnight lows near 72°F, with 4.3 in of rain across 12.3 wet days and about 14.4 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 29% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 42 min at the start of July to 14 h 06 min by month's end. Set against the rest of the year, July is Greater Upper Marlboro's 7th-clearest and 11th-windiest month. For the whole year in context, see Greater Upper Marlboro's year-round climate.

Daytime high
87°
1st warmest
Overnight low
72°
12th coldest
Rainfall
4.3 in
12.3 wet days
Daylight
14 h 30 min
4:58 AM – 7:27 PM
Cloud cover
58%
7th clearest
Wind
5 mph
11th windiest
Solar energy
6.04 kWh/m²
Travel score
4.5
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 87°F through the month.

A typical July day in Greater Upper Marlboro reaches about 87°F in the afternoon and slips back to 72°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 94°F. Set against its neighbours, July runs about 4°F warmer than June and about 2°F warmer than August.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18671
28671
38671
48671
58771
68772
78772
88772
98772
108772
118772
128772
138772
148773
158773
168773
178773
188773
198773
208773
218773
228773
238773
248773
258773
268773
278773
288773
298672
308672
318672

How July really feels in Greater Upper Marlboro

Once humidity and wind are folded in, July averages 21 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
21
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Greater Upper Marlboro weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 1st-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 23% of July, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35149
45149
55149
65149
75149
85149
95248
105248
115347
125347
135347
145347
155347
165347
175347
185347
195347
205248
215248
225248
235149
245149
255248
265248
275248
285149
295248
305248
315248

Chance of precipitation in July

Any precipitation

Greater Upper Marlboro gets around 4.3 in of rain over 12.3 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
341
440
540
640
739
839
938
1038
1137
1237
1337
1437
1536
1637
1737
1837
1938
2038
2139
2239
2340
2440
2540
2641
2741
2841
2941
3040
3140

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
15122231291
24122131301
34122131311
44122031311
54112031321
64112032321
74112032322
84111932322
94111932332
103101932332
113101933332
123101833342
13391833343
14391833353
15281734353
16281734363
17281734363
18271734373
19271634383
20271634393
21261634393
22261634403
23261634403
24261534402
25261535412
26261535412
27261535401
28261536401
29261536391
30271636391
31271636381

Wind in July

Winds average 5 mph in July.

Across July, daily wind ranges from about 5 mph on the calmest days to 5 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
295calm
305calm
315calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 42 min at the start of July to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 4:50 AM to 5:11 AM, and sunset from 7:31 PM to 7:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:507:31
214.74:507:31
314.74:517:31
414.74:517:31
514.74:527:31
614.64:527:30
714.64:537:30
814.64:537:30
914.64:547:30
1014.64:547:29
1114.64:557:29
1214.54:567:29
1314.54:567:28
1414.54:577:28
1514.54:587:27
1614.54:587:27
1714.44:597:26
1814.45:007:26
1914.45:017:25
2014.45:017:24
2114.45:027:24
2214.35:037:23
2314.35:047:22
2414.35:057:22
2514.35:067:21
2614.25:067:20
2714.25:077:19
2814.25:087:18
2914.15:097:17
3014.15:107:16
3114.15:117:16

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.04 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 — July's 6.04 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.1Intense
176.1Intense
186.1Intense
196.0Intense
206.0Intense
216.0Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Hazard calendar for Greater Upper Marlboro

In seasonPeak

In July, 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 July a good time to visit Greater Upper Marlboro?

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

4.5
Sightseeing
7th-best month of the year
6.4
Beach & pool
3rd-best month of the year

July 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 July

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

In July, Greater Upper Marlboro sees daytime highs around 87°F and nights near 72°F. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

Sea temperature near Greater Upper Marlboro in July

The nearest coast averages about 76°F in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). 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 July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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
July 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).