Dover in Summer
In summer (June, July and August), Dover sees average daytime highs around 77°F and overnight lows near 61°F, with 10.1 in of rain over about 31 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 70°F in early June to 76°F by late August. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels humid.
Summer is Dover's best season of the year to visit on our travel score. For the whole year in context, see Dover's year-round climate.
- Avg daytime high
- 77°F
- warmest season of the year
- Avg overnight low
- 61°F
- Rainfall
- 10.1 in
- 31 wet days
- Avg wind
- 6 mph
- Travel score
- 6.6
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Dover in Summer
Over the season highs climb from about 70°F in early June to 76°F by late August.
A typical summer day in Dover reaches about 77°F and drops to 61°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Dover
Once humidity and wind are folded in, summer brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Dover 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 | 32° / 19° | 3.4 | 9.3 | 6.8 | 9.2 | 0.0 |
| Feb | 34° / 20° | 3.2 | 9 | 6.1 | 10.2 | 0.0 |
| Mar | 42° / 28° | 4.2 | 10.9 | 5.4 | 11.6 | 0.4 |
| Apr | 54° / 38° | 4.0 | 10.5 | 1.4 | 13.1 | 3.1 |
| May | 64° / 48° | 3.0 | 10.3 | 0 | 14.4 | 5.5 |
| Jun | 74° / 58° | 3.6 | 10.8 | 0 | 15.1 | 6.5 |
| Jul | 79° / 64° | 3.2 | 10.7 | 0 | 14.9 | 6.5 |
| Aug | 78° / 62° | 3.3 | 9.2 | 0 | 13.8 | 6.9 |
| Sep | 71° / 55° | 3.4 | 8.3 | 0 | 12.3 | 6.9 |
| Oct | 59° / 45° | 4.2 | 9.5 | 0.2 | 10.8 | 4.8 |
| Nov | 48° / 35° | 3.6 | 9.2 | 1.2 | 9.5 | 1.8 |
| Dec | 38° / 26° | 4.4 | 10.4 | 5.2 | 8.9 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
Dover gets around 10.1 in of rain over 31 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 6 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 54 min in early June to 13 h 06 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 Dover
In summer, Dover overlaps its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Dover sits in the Atlantic hurricane belt; the season peaks August–October.
Is summer a good time to visit Dover?
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 Dover for sightseeing.
What to pack for Dover in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Dover sees daytime highs around 77°F and nights near 61°F. Pack sun protection. Worth having: light clothes and rain gear. About 31 days see rain.
Sea temperature near Dover in Summer
The nearest coast averages about 61°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 14 mi away) is warmest in August at about 65°F and coldest in March near 38°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 42 | 39 | 38 | 42 | 49 | 57 | 63 | 65 | 62 | 55 | 49 | 45 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 42 | Bracing |
| Feb | 39 | Bracing |
| Mar | 38 | Bracing |
| Apr | 42 | Bracing |
| May | 49 | Bracing |
| Jun | 57 | Bracing |
| Jul | 63 | Cool |
| Aug | 65 | Cool |
| Sep | 62 | Cool |
| Oct | 55 | Bracing |
| Nov | 49 | Bracing |
| Dec | 45 | Bracing |
UV index in Dover in Summer
Clear-sky midday UV across summer averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dover peaks around July 10 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 7 | 7 | 7 | 4 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Moderate | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 7 | High |
| Jun | 7 | High |
| Jul | 7 | Very high |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Where is Dover?
Dover sits at 43.2°N, 70.9°W, 62 ft above sea level, in United States. The nearest listed city is Rochester, 8.7 mi away.
Topography around Dover
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Dover.
Within 2 miles, the terrain around Dover has only modest variations in elevation — a maximum elevation change of 315 ft around an average of 121 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 2,943 ft.
The land around Dover is covered by trees (62%) and grassland (20%) within 2 miles, trees (75%) within 10 miles, and trees (67%) and water (27%) 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 Dover (43.1979°, -70.8737°, elevation 62 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.