Greater Upper Marlboro in Fall
In fall (September, October and November), Greater Upper Marlboro sees average daytime highs around 67°F and overnight lows near 53°F, with 10.7 in of precipitation over about 25 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 82°F in early September to 53°F by late November. The sky is clear or mostly clear about 39% of the time across fall, and the air most often feels dry.
Fall is Greater Upper Marlboro's best season of the year to visit on our travel score. For the whole year in context, see Greater Upper Marlboro's year-round climate.
- Avg daytime high
- 67°F
- 2nd-warmest season
- Avg overnight low
- 53°F
- Precipitation
- 10.7 in
- 25 wet days
- Avg wind
- 7 mph
- Travel score
- 5.9
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Greater Upper Marlboro in Fall
Over the season highs ease from about 82°F in early September to 53°F by late November.
A typical fall day in Greater Upper Marlboro reaches about 67°F and drops to 53°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Greater Upper Marlboro
Once humidity and wind are folded in, fall brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
fall 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 the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 44° / 30° | 3.1 | 8.6 | 2.6 | 9.6 | 0.7 |
| Feb | 46° / 31° | 2.9 | 8.6 | 2.4 | 10.5 | 1.4 |
| Mar | 55° / 38° | 4.0 | 10.3 | 1.5 | 11.7 | 3.4 |
| Apr | 66° / 49° | 3.4 | 10 | 0.1 | 13 | 5.9 |
| May | 74° / 58° | 3.7 | 10.7 | 0 | 14.1 | 6.6 |
| Jun | 83° / 67° | 3.7 | 11 | 0 | 14.7 | 5.7 |
| Jul | 87° / 72° | 4.3 | 12.3 | 0 | 14.4 | 4.5 |
| Aug | 85° / 71° | 4.0 | 10.6 | 0 | 13.5 | 5.3 |
| Sep | 78° / 64° | 4.3 | 9.1 | 0 | 12.3 | 6.9 |
| Oct | 67° / 52° | 3.5 | 7.9 | 0 | 11 | 6.6 |
| Nov | 56° / 42° | 2.9 | 7.6 | 0.1 | 9.9 | 4.2 |
| Dec | 47° / 35° | 3.5 | 8.8 | 1.2 | 9.3 | 1.7 |
Cloud cover in Fall
The sky is clear or mostly clear about 39% of the time across fall.
Chance of precipitation in Fall
Greater Upper Marlboro gets around 10.7 in of rain and snow over 25 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 7 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 54 min in early September to 9 h 30 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.4 kWh/m².
Hazard calendar for Greater Upper Marlboro
In fall, Greater Upper Marlboro overlaps 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.
Is fall a good time to visit Greater Upper Marlboro?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Greater Upper Marlboro for sightseeing.
What to pack for Greater Upper Marlboro in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Greater Upper Marlboro sees daytime highs around 67°F and nights near 53°F. Worth packing: light clothes, a warm layer and rain gear. About 25 days see rain.
Sea temperature near Greater Upper Marlboro in Fall
The nearest coast averages about 64°F across fall — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 38 | 37 | 40 | 47 | 58 | 68 | 76 | 78 | 74 | 65 | 54 | 45 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Warm | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 37 | Bracing |
| Mar | 40 | Bracing |
| Apr | 47 | Bracing |
| May | 58 | Bracing |
| Jun | 68 | Refreshing |
| Jul | 76 | Warm |
| Aug | 78 | Warm |
| Sep | 74 | Refreshing |
| Oct | 65 | Cool |
| Nov | 54 | Bracing |
| Dec | 45 | Bracing |
UV index in Greater Upper Marlboro in Fall
Clear-sky midday UV across fall averages around 4 — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 7 | 6 | 4 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Greater Upper Marlboro in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 12 | 13 | 13 | 15 | 16 | 17 | 14 | 12 | 9 | 8 | 10 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 12 | Good |
| Mar | 13 | Moderate |
| Apr | 13 | Moderate |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 17 | Moderate |
| Aug | 14 | Moderate |
| Sep | 12 | Good |
| Oct | 9 | Good |
| Nov | 8 | Good |
| Dec | 10 | Good |
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.
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
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.