Dover weather in August

In August, Dover sees average daytime highs of 78°F and overnight lows near 62°F, with 3.3 in of rain across 9.2 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 76°F by the end. The sky is clear or mostly clear about 34% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Dover's 4th-clearest and 12th-windiest month. For the whole year in context, see Dover's year-round climate.

Daytime high
78°
2nd warmest
Overnight low
62°
11th coldest
Rainfall
3.3 in
9.2 wet days
Daylight
13 h 48 min
4:54 AM – 6:41 PM
Cloud cover
56%
4th clearest
Wind
6 mph
12th windiest
Solar energy
5.4 kWh/m²
Travel score
6.9
out of 10

Dover is county seat city in Strafford County, New Hampshire, United States.

Density
411/km²
people per km²
Founded
1623

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 79°F in the first days to 76°F by the end.

A typical August day in Dover reaches about 78°F in the afternoon and slips back to 62°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 86°F. Set against its neighbours, August runs on par with July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
17964
27964
37964
47964
57964
67964
77964
87964
97964
107963
117963
127863
137863
147863
157863
167863
177862
187862
197862
207862
217762
227762
237761
247761
257761
267761
277761
287660
297660
307660
317660

How August really feels in Dover

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.

Dover weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 19°3.49.36.89.20.0
Feb34° / 20°3.296.110.20.0
Mar42° / 28°4.210.95.411.60.4
Apr54° / 38°4.010.51.413.13.1
May64° / 48°3.010.3014.45.5
Jun74° / 58°3.610.8015.16.5
Jul79° / 64°3.210.7014.96.5
Aug78° / 62°3.39.2013.86.9
Sep71° / 55°3.48.3012.36.9
Oct59° / 45°4.29.50.210.84.8
Nov48° / 35°3.69.21.29.51.8
Dec38° / 26°4.410.45.28.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35248
45248
55248
65149
75149
85149
95050
105050
115050
124951
135050
145050
155050
165050
175149
185248
195347
205446
215545
225644
235644
245842
255842
265842
275842
285842
295842
305842
315842

Chance of precipitation in August

Any precipitation

Dover gets around 3.3 in of rain over 9.2 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 30% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
334
434
534
634
733
833
933
1033
1133
1232
1332
1431
1531
1631
1730
1830
1929
2028
2128
2227
2327
2426
2526
2626
2725
2825
2925
3025
3125

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1102331307
2102331306
3112331296
4112331296
5112331286
6112332286
7122332276
8122333275
9122333265
10132333265
11132334255
12142334255
13142334244
14142334244
15152434234
16152434234
17152534234
18162533223
19172633223
20172632223
21192631223
22202730213
23212729213
24222728203
25232827203
26252826192
27262825182
28272825182
29282824172
30292824172
31302824162

Wind in August

Winds average 6 mph in August, the calmest month.

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

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 4:38 AM to 5:11 AM, and sunset from 7:02 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:387:02
214.44:397:00
314.34:406:59
414.34:416:58
514.24:426:57
614.24:436:55
714.24:446:54
814.14:456:53
914.14:466:51
1014.04:476:50
1114.04:486:49
1214.04:506:47
1313.94:516:46
1413.94:526:44
1513.84:536:43
1613.84:546:41
1713.74:556:40
1813.74:566:38
1913.74:576:36
2013.64:596:35
2113.65:006:33
2213.55:016:32
2313.55:026:30
2413.45:036:28
2513.45:046:27
2613.35:056:25
2713.35:066:23
2813.25:086:21
2913.25:096:20
3013.15:106:18
3113.15:116:16

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.4 kWh/m².

For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 6.07 kWh/m² in July across the year — August's 5.4 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
315.0Bright
Planning a trip in August

Hazard calendar for Dover

In seasonPeak

In August, Dover sits inside 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.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Dover?

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

6.9
Sightseeing
1st-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Dover in August

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

In August, Dover sees daytime highs around 78°F and nights near 62°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Dover in August

The nearest coast averages about 65°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 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.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan42Bracing
Feb39Bracing
Mar38Bracing
Apr42Bracing
May49Bracing
Jun57Bracing
Jul63Cool
Aug65Cool
Sep62Cool
Oct55Bracing
Nov49Bracing
Dec45Bracing

UV index in Dover in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateModerateLowJul 10UV 7Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun7High
Jul7Very high
Aug4Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

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.

2 miles
315 ft
10 miles
696 ft
50 miles
2,943 ft
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Rochester 8.7 mi · Portsmouth 9.9 mi · Sanford 17 mi · Amesbury 24 mi · Newburyport 27 mi · Biddeford 29 mi · Saco 30 mi · Derry Village 30 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 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).