Manchester weather in August

In August, Manchester sees average daytime highs of 80°F and overnight lows near 61°F, with 3.4 in of rain across 9.7 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 82°F in the first days to 78°F by the end. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels dry.

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 Manchester's 3rd-clearest and 12th-windiest month. For the whole year in context, see Manchester's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
3.4 in
9.7 wet days
Daylight
13 h 48 min
4:57 AM – 6:43 PM
Cloud cover
57%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.19 kWh/m²
Travel score
6.6
out of 10

Manchester is city in Hillsborough County in southern New Hampshire, United States.

Density
1,218/km²
people per km²
Founded
1722

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 82°F in the first days to 78°F by the end.

A typical August day in Manchester reaches about 80°F in the afternoon and slips back to 61°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 89°F. Set against its neighbours, August runs about 2°F cooler than July and about 8°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18263
28263
38263
48263
58163
68162
78162
88162
98162
108162
118162
128162
138062
148062
158061
168061
178061
188061
198061
208061
218060
227960
237960
247960
257960
267959
277959
287859
297859
307859
317858

How August really feels in Manchester

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.

Manchester weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 17°3.19.46.79.20.0
Feb35° / 18°3.08.76.410.20.0
Mar43° / 27°3.910.75.711.60.6
Apr56° / 38°3.710.51.713.13.6
May67° / 48°3.110.60.114.45.9
Jun76° / 57°3.611.6015.16.4
Jul82° / 63°3.510.4014.86.2
Aug80° / 61°3.49.7013.86.6
Sep72° / 53°3.48.4012.36.9
Oct60° / 42°4.09.40.410.84.8
Nov48° / 33°3.49.41.79.51.7
Dec37° / 23°4.110.25.98.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35050
45050
55149
65050
75050
84951
94951
104951
114852
124852
134852
144951
154951
165050
175050
185050
195248
205248
215446
225446
235545
245644
255644
265644
275644
285644
295644
305644
315644

Chance of precipitation in August

Any precipitation

Manchester gets around 3.4 in of rain over 9.7 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 31% and peaks near 36% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
335
435
535
635
735
835
935
1035
1134
1234
1333
1433
1532
1632
1731
1831
1930
2029
2129
2228
2327
2427
2526
2626
2725
2825
2925
3025
3125

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 19% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1212531194
2222530194
3222530194
4222629184
5222629184
6222629184
7232729184
8232728184
9232728183
10232728183
11242828183
12242827183
13242827182
14242927182
15252926182
16253026182
17253026172
18263025171
19273025171
20283025161
21293024161
22312923151
23322923151
24342922141
25352921141
26362821131
27372820132
28392820122
29402819121
30412719121
31422719121

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 4:40 AM to 5:14 AM, and sunset from 7:03 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:407:03
214.34:417:02
314.34:427:01
414.34:447:00
514.24:456:59
614.24:466:57
714.24:476:56
814.14:486:55
914.14:496:53
1014.04:506:52
1114.04:516:50
1213.94:526:49
1313.94:536:48
1413.94:546:46
1513.84:566:45
1613.84:576:43
1713.74:586:42
1813.74:596:40
1913.65:006:38
2013.65:016:37
2113.55:026:35
2213.55:036:34
2313.55:056:32
2413.45:066:30
2513.45:076:29
2613.35:086:27
2713.35:096:25
2813.25:106:23
2913.25:116:22
3013.15:126:20
3113.15:146:18

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.19 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 5.86 kWh/m² in July across the year — August's 5.19 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.4Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Manchester

In seasonPeak

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

Manchester 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 Manchester?

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

6.6
Sightseeing
2nd-best month of the year
6.6
Beach & pool
2nd-best month of the year

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

What to pack for Manchester in August

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

In August, Manchester sees daytime highs around 80°F and nights near 61°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Manchester 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 43 mi away) is warmest in August at about 65°F and coldest in March near 39°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
Feb40Bracing
Mar39Bracing
Apr42Bracing
May49Bracing
Jun57Bracing
Jul64Cool
Aug65Cool
Sep62Cool
Oct56Bracing
Nov49Bracing
Dec46Bracing

UV index in Manchester 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 Manchester 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighHighModerateLowJul 10UV 7Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7High
Jul7Very high
Aug5Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Manchester in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Manchester is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1715 µg/m³Nov 188 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar13Moderate
Apr13Moderate
May14Moderate
Jun13Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Manchester?

Manchester sits at 43.0°N, 71.5°W, 262 ft above sea level, in United States. The nearest listed city is Bedford, 4.3 mi away.

Topography around Manchester

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

Within 2 miles, the terrain around Manchester has only modest variations in elevation — a maximum elevation change of 459 ft around an average of 295 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,237 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,176 ft.

The land around Manchester is covered by artificial surfaces (50%) and trees (37%) within 2 miles, trees (81%) within 10 miles, and trees (82%) within 50 miles.

2 miles
459 ft
10 miles
1,237 ft
50 miles
3,176 ft
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Bedford 4.3 mi · Merrimack 9.3 mi · Derry Village 9.9 mi · Derry 9.9 mi · Concord 16 mi · Nashua 16 mi · East Concord 17 mi · Salem 19 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 Manchester (42.9956°, -71.4548°, elevation 262 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).