Aspen Hill in Summer
In summer (June, July and August), Aspen Hill sees average daytime highs around 86°F and overnight lows near 68°F, with 11.1 in of rain over about 34 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 80°F in early June to 84°F by late August. The sky is clear or mostly clear about 27% of the time across summer, and the air most often feels muggy.
Summer is Aspen Hill's 3rd-best season to visit on our travel score. For the whole year in context, see Aspen Hill's year-round climate.
- Avg daytime high
- 86°F
- warmest season of the year
- Avg overnight low
- 68°F
- Rainfall
- 11.1 in
- 34 wet days
- Avg wind
- 5 mph
- Travel score
- 4.9
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Aspen Hill in Summer
Over the season highs climb from about 80°F in early June to 84°F by late August.
A typical summer day in Aspen Hill reaches about 86°F and drops to 68°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Aspen Hill
Once humidity and wind are folded in, summer brings about 16 days that feel above 90°F and 0 that feel at or below 32°F.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Aspen Hill weather by month
How the three summer months (June, July and August) 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 | 43° / 28° | 3.1 | 8.6 | 2.9 | 9.6 | 0.4 |
| Feb | 46° / 29° | 2.9 | 8.5 | 2.8 | 10.5 | 1.2 |
| Mar | 55° / 36° | 3.9 | 10.3 | 1.9 | 11.7 | 3.4 |
| Apr | 66° / 47° | 3.4 | 10.1 | 0.1 | 13 | 5.9 |
| May | 74° / 56° | 3.8 | 11 | 0 | 14.1 | 6.6 |
| Jun | 83° / 65° | 3.5 | 11.3 | 0 | 14.7 | 5.4 |
| Jul | 88° / 70° | 4.1 | 12.1 | 0 | 14.5 | 4.3 |
| Aug | 85° / 68° | 3.5 | 10.1 | 0 | 13.5 | 5.1 |
| Sep | 79° / 61° | 4.3 | 9.3 | 0 | 12.3 | 6.8 |
| Oct | 67° / 49° | 3.4 | 7.8 | 0 | 11 | 6.6 |
| Nov | 56° / 39° | 2.9 | 7.5 | 0.2 | 9.9 | 4.1 |
| Dec | 47° / 32° | 3.5 | 8.8 | 1.6 | 9.3 | 1.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 27% of the time across summer.
Chance of precipitation in Summer
Aspen Hill gets around 11.1 in of rain over 34 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 30 min in early June to 12 h 54 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.8 kWh/m².
Hazard calendar for Aspen Hill
In summer, Aspen Hill overlaps its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Aspen Hill sits in the Atlantic hurricane belt; the season peaks August–October.
Is summer a good time to visit Aspen Hill?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Aspen Hill for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Aspen Hill in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Aspen Hill sees daytime highs around 86°F and nights near 68°F. Pack light clothes and sun protection. Worth having: rain gear. About 34 days see rain.
Sea temperature near Aspen Hill in Summer
The nearest coast averages about 74°F across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 37 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 38 | 36 | 40 | 47 | 58 | 68 | 76 | 78 | 74 | 65 | 53 | 44 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Warm | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 36 | 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 | 53 | Bracing |
| Dec | 44 | Bracing |
UV index in Aspen Hill in Summer
Clear-sky midday UV across summer averages 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 Aspen Hill 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 | Low | Moderate | High | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| 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 Aspen Hill in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Aspen Hill is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 9 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) | 11 | 12 | 13 | 13 | 15 | 16 | 17 | 15 | 12 | 9 | 9 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 12 | Moderate |
| Mar | 13 | Moderate |
| Apr | 13 | Moderate |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 17 | Moderate |
| Aug | 15 | Moderate |
| Sep | 12 | Moderate |
| Oct | 9 | Good |
| Nov | 9 | Good |
| Dec | 10 | Good |
Where is Aspen Hill?
Aspen Hill sits at 39.1°N, 77.1°W, 328 ft above sea level, in United States. The nearest listed city is Wheaton, 3.1 mi away.
Topography around Aspen Hill
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Aspen Hill.
Within 2 miles, the terrain around Aspen Hill has only modest variations in elevation — a maximum elevation change of 285 ft around an average of 384 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 696 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,313 ft.
The land around Aspen Hill is covered by trees (68%) and artificial surfaces (20%) within 2 miles, trees (71%) within 10 miles, and trees (59%) 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 Aspen Hill (39.0795°, -77.073°, elevation 328 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.