Brunswick weather in August

In August, Brunswick sees average daytime highs of 76°F and overnight lows near 61°F, with 3.1 in of rain across 8.7 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 78°F in the first days to 74°F by the end. The sky is clear or mostly clear about 33% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Brunswick's 3rd-clearest and 12th-windiest month. For the whole year in context, see Brunswick's year-round climate.

Daytime high
76°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
3.1 in
8.7 wet days
Daylight
13 h 48 min
4:49 AM – 6:39 PM
Cloud cover
56%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.35 kWh/m²
Travel score
7.2
out of 10

Brunswick is town in Cumberland County, Maine, United States.

Founded
1628

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 78°F in the first days to 74°F by the end.

A typical August day in Brunswick reaches about 76°F in the afternoon and slips back to 61°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 83°F. Set against its neighbours, August runs on par with July and about 7°F warmer than September.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17863
27863
37862
47862
57862
67862
77762
87762
97762
107762
117762
127762
137762
147762
157761
167661
177661
187661
197661
207661
217660
227660
237660
247560
257560
267560
277559
287559
297459
307459
317458

How August really feels in Brunswick

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.

Brunswick 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
Jan30° / 15°3.39.26.89.10.0
Feb32° / 16°3.08.76.610.20.0
Mar40° / 25°3.910.25.911.60.2
Apr51° / 37°3.810.72.113.22.6
May62° / 46°3.110.60.114.55.1
Jun71° / 56°3.610.7015.26.4
Jul77° / 62°3.19.9014.96.8
Aug76° / 61°3.18.7013.87.2
Sep69° / 54°3.48.6012.36.6
Oct57° / 44°4.59.90.210.84.2
Nov46° / 33°3.69.51.89.51.2
Dec36° / 22°4.1116.28.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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 46%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
35149
45248
55149
65149
75149
85149
95248
105248
115248
125248
135248
145248
155248
165248
175248
185347
195347
205545
215644
225644
235842
245842
255842
265842
275941
285941
295941
305941
315842

Chance of precipitation in August

Any precipitation

Brunswick gets around 3.1 in of rain over 8.7 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 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
329
429
529
629
729
829
929
1029
1129
1229
1329
1429
1529
1629
1729
1829
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 30% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1132733244
2132732234
3132832234
4132832234
5132932223
6142932223
7143031223
8143031223
9143031213
10153031212
11153032212
12163032202
13163032202
14173032202
15173032192
16183032191
17183031191
18193031181
19203031181
20213030181
21222930181
22242929171
23252928171
24262927161
25282927161
26292926151
27302925151
28312925141
29322924141
30332924131
31342923131

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 30 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 84 minutes over August. Sunrise moves from 4:32 AM to 5:07 AM, and sunset from 7:00 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:327:00
214.44:336:59
314.44:346:57
414.34:356:56
514.34:366:55
614.34:386:54
714.24:396:52
814.24:406:51
914.14:416:49
1014.14:426:48
1114.14:436:47
1214.04:446:45
1314.04:466:44
1413.94:476:42
1513.94:486:40
1613.84:496:39
1713.84:506:37
1813.74:516:36
1913.74:526:34
2013.64:546:32
2113.64:556:31
2213.64:566:29
2313.54:576:27
2413.54:586:26
2513.44:596:24
2613.45:016:22
2713.35:026:20
2813.35:036:19
2913.25:046:17
3013.25:056:15
3113.15:076:13

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.35 kWh/m².

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 5.99 kWh/m² in July across the year — August's 5.35 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Hazard calendar for Brunswick

In seasonPeak

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

Brunswick 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 Brunswick?

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

7.2
Sightseeing
1st-best month of the year
6.3
Beach & pool
1st-best month of the year

August is one of the better times to visit Brunswick for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Brunswick in August

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

In August, Brunswick sees daytime highs around 76°F and nights near 61°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Brunswick in August

The nearest coast averages about 62°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 17 mi away) is warmest in August at about 62°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°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan41Bracing
Feb38Bracing
Mar38Bracing
Apr41Bracing
May47Bracing
Jun54Bracing
Jul60Cool
Aug62Cool
Sep58Bracing
Oct54Bracing
Nov49Bracing
Dec45Bracing

UV index in Brunswick 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 Brunswick peaks around July 12 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateModerateLowJul 12UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul7Very high
Aug4Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Brunswick?

Brunswick sits at 43.9°N, 70.0°W, 62 ft above sea level, in United States. The nearest listed city is Lewiston, 18 mi away.

Topography around Brunswick

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

Within 2 miles, the terrain around Brunswick has only modest variations in elevation — a maximum elevation change of 249 ft around an average of 92 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 456 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,526 ft.

The land around Brunswick is covered by trees (60%) within 2 miles, trees (68%) within 10 miles, and trees (62%) and water (33%) within 50 miles.

2 miles
249 ft
10 miles
456 ft
50 miles
2,526 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Lewiston 18 mi · Auburn 18 mi · Portland 23 mi · South Portland 24 mi · South Portland Gardens 26 mi · Westbrook 26 mi · Augusta 29 mi · West Scarborough 32 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 Brunswick (43.9145°, -69.9653°, 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).