Barnstable weather in August

In August, Barnstable sees average daytime highs of 71°F and overnight lows near 67°F, with 3.1 in of rain across 7.8 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 71°F through the month. The sky is clear or mostly clear about 42% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Barnstable's 1st-clearest and 12th-windiest month. For the whole year in context, see Barnstable's year-round climate.

Daytime high
71°
1st warmest
Overnight low
67°
12th coldest
Rainfall
3.1 in
7.8 wet days
Daylight
13 h 42 min
4:54 AM – 6:36 PM
Cloud cover
51%
1st clearest
Wind
11 mph
12th windiest
Solar energy
5.67 kWh/m²
Travel score
7.1
out of 10

Barnstable is town in Massachusetts, United States.

Density
241/km²
people per km²
Founded
1637

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 71°F through the month.

A typical August day in Barnstable reaches about 71°F in the afternoon and slips back to 67°F overnight — a 4°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 75°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

60°65°70°75°80°151015202531
Avg high (°F)Avg low (°F)
17268
27268
37268
47268
57268
67268
77268
87268
97268
107268
117168
127168
137168
147168
157168
167167
177167
187167
197167
207167
217167
227167
237167
247067
257066
267066
277066
287066
297066
306966
316965

How August really feels in Barnstable

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.

Barnstable weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 30°4.311.24.79.30.0
Feb38° / 30°3.8104.710.30.0
Mar41° / 34°4.811.23.711.70.1
Apr47° / 42°4.311.30.613.11.5
May55° / 50°3.610.3014.33.5
Jun64° / 60°3.28.20155.9
Jul71° / 67°2.57.7014.77.0
Aug71° / 67°3.17.8013.77.1
Sep66° / 62°4.08.3012.36.5
Oct59° / 54°4.810.1010.94.6
Nov51° / 44°4.4100.39.62.4
Dec43° / 36°5.1122.890.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25644
35743
45743
55644
65743
75644
85644
95644
105545
115545
125545
135545
145545
155545
165545
175545
185644
195644
205743
215743
225842
235842
245941
256040
266040
276040
286040
296040
306040
315941

Chance of precipitation in August

Any precipitation

Barnstable gets around 3.1 in of rain over 7.8 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 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
327
427
527
627
727
827
927
1027
1127
1227
1327
1427
1527
1626
1726
1825
1925
2024
2124
2224
2323
2423
2523
2623
2723
2823
2924
3024
3124

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1112314312
2113314312
3113324212
4113324212
5113324212
6113324112
7113324112
8213324112
9214324012
10214334012
11214333912
12214333912
13214333911
14314333911
15314343811
16315343810
17315353810
1841535379
1941635379
2041636368
2141736357
2251737357
2351837346
2461937336
2562037325
2672137314
2782137304
2882237293
2992336293
30102336283
31112436273

Wind in August

Winds average 11 mph in August, the calmest month.

Across August, daily wind ranges from about 11 mph on the calmest days to 12 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1311light breeze
1411light breeze
1511light breeze
1611light breeze
1711light breeze
1811light breeze
1911light breeze
2011light breeze
2111light breeze
2211light breeze
2311light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 4:39 AM to 5:10 AM, and sunset from 6:55 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:396:55
214.24:406:54
314.24:416:53
414.24:426:52
514.14:436:51
614.14:446:50
714.14:456:48
814.04:466:47
914.04:476:46
1013.94:486:45
1113.94:496:43
1213.94:506:42
1313.84:516:40
1413.84:526:39
1513.74:536:38
1613.74:546:36
1713.74:566:35
1813.64:576:33
1913.64:586:32
2013.54:596:30
2113.55:006:29
2213.45:016:27
2313.45:026:25
2413.35:036:24
2513.35:046:22
2613.35:056:20
2713.25:066:19
2813.25:076:17
2913.15:086:15
3013.15:096:14
3113.05:106:12

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.67 kWh/m².

For context, solar energy here swings from a low near 1.58 kWh/m² to a high of 6.41 kWh/m² in July across the year — August's 5.67 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.8Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.4Bright
265.4Bright
275.4Bright
285.3Bright
295.3Bright
305.3Bright
315.2Bright
Planning a trip in August

Hazard calendar for Barnstable

In seasonPeak

In August, Barnstable sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Barnstable 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 Barnstable?

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

7.1
Sightseeing
1st-best month of the year
4.7
Beach & pool
1st-best month of the year

August is one of the better times to visit Barnstable for general sightseeing.

What to pack for Barnstable in August

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

In August, Barnstable sees daytime highs around 71°F and nights near 67°F. Worth packing: sun protection. About 8 days see rain.

sun protection

Sea temperature near Barnstable in August

The nearest coast averages about 69°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 69°F and coldest in February near 37°F.

It's comfortable for a long swim from Aug 5 to Aug 23 — about 0.6 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan40Bracing
Feb37Bracing
Mar38Bracing
Apr44Bracing
May51Bracing
Jun59Cool
Jul67Cool
Aug69Refreshing
Sep66Cool
Oct59Cool
Nov51Bracing
Dec45Bracing

UV index in Barnstable in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Barnstable peaks around June 21 at about 8 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 21UV 8Dec 23UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun8Very high
Jul8Very high
Aug5Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Barnstable?

Barnstable sits at 41.7°N, 70.3°W, 36 ft above sea level, in United States. The nearest listed city is Yarmouth, 3.7 mi away.

Topography around Barnstable

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Barnstable.

Within 2 miles, the terrain around Barnstable has only modest variations in elevation — a maximum elevation change of 171 ft around an average of 56 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 315 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 630 ft.

The land around Barnstable is covered by trees (51%) and water (25%) within 2 miles, water (58%) and trees (32%) within 10 miles, and water (74%) and trees (22%) within 50 miles.

2 miles
171 ft
10 miles
315 ft
50 miles
630 ft
treesgrasslandartificial surfacesbare terrainwaterwetland
August weather nearby: Yarmouth 3.7 mi · Provincetown 25 mi · Duxbury 30 mi · Fairhaven 32 mi · New Bedford 33 mi · Middleborough 34 mi · Hanover 39 mi · Taunton 43 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 Barnstable (41.7001°, -70.2995°, elevation 36 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).