New London weather in August

In August, New London sees average daytime highs of 74°F and overnight lows near 68°F, with 3.8 in of rain across 8.8 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 74°F through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels muggy.

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

Daytime high
74°
1st warmest
Overnight low
68°
12th coldest
Rainfall
3.8 in
8.8 wet days
Daylight
13 h 42 min
5:02 AM – 6:43 PM
Cloud cover
52%
1st clearest
Wind
10 mph
12th windiest
Solar energy
5.61 kWh/m²
Travel score
7.2
out of 10

New London is city in Connecticut, United States.

Density
989/km²
people per km²
Founded
1646

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 74°F through the month.

A typical August day in New London reaches about 74°F in the afternoon and slips back to 68°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 78°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

60°70°80°151015202531
Avg high (°F)Avg low (°F)
17569
27569
37569
47569
57569
67569
77569
87569
97569
107569
117569
127568
137568
147568
157468
167468
177468
187468
197468
207468
217467
227467
237467
247467
257467
267467
277367
287367
297366
307366
317366

How August really feels in New London

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.

New London weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 29°4.010.44.59.40.0
Feb38° / 29°3.69.1410.30.0
Mar43° / 34°4.710.53.411.70.4
Apr50° / 43°4.210.90.413.12.3
May58° / 51°3.510.8014.34.3
Jun67° / 61°3.69.6014.96.3
Jul74° / 68°3.08.7014.77.2
Aug74° / 68°3.88.8013.77.2
Sep69° / 62°4.18.8012.36.8
Oct61° / 53°4.89.40.110.95.3
Nov52° / 44°4.29.30.39.72.8
Dec44° / 35°4.911.52.89.10.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25743
35743
45743
55743
65743
75644
85644
95545
105545
115545
125545
135545
145545
155545
165545
175545
185545
195545
205644
215743
225743
235842
245842
255941
265941
275941
286040
295941
305941
315941

Chance of precipitation in August

Any precipitation

New London gets around 3.8 in of rain over 8.8 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
429
529
629
730
830
930
1031
1131
1231
1331
1431
1531
1631
1731
1830
1930
2029
2128
2228
2327
2427
2526
2626
2726
2825
2925
3025
3125

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 51% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1312263920
2312263820
3312273821
4312273721
5311273721
6411273621
7412273621
8412273621
9412273621
10412273621
11413273620
12413273720
13413263719
14414263718
15414263818
16415263817
17415273816
18416273815
19416273814
20517273813
21518283712
22518283712
23619283611
24620293510
25720293410
2682129339
2782130329
2892130328
29102130318
30112229308
31122229308

Wind in August

Winds average 10 mph in August, the calmest month.

Across August, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 12 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 72 minutes over August. Sunrise moves from 4:47 AM to 5:18 AM, and sunset from 7:02 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:477:02
214.24:487:01
314.24:497:00
414.14:506:58
514.14:516:57
614.14:526:56
714.04:536:55
814.04:546:54
914.04:556:52
1013.94:566:51
1113.94:576:50
1213.84:586:48
1313.84:596:47
1413.85:006:46
1513.75:016:44
1613.75:026:43
1713.65:036:41
1813.65:046:40
1913.55:056:38
2013.55:066:37
2113.55:086:35
2213.45:096:34
2313.45:106:32
2413.35:116:30
2513.35:126:29
2613.25:136:27
2713.25:146:26
2813.25:156:24
2913.15:166:22
3013.15:176:21
3113.05:186:19

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.61 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 6.35 kWh/m² in June across the year — August's 5.61 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
26.0Bright
35.9Bright
45.9Bright
55.9Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.4Bright
235.4Bright
245.4Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
315.1Bright
Planning a trip in August

Hazard calendar for New London

In seasonPeak

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

New London 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 New London?

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
5.9
Beach & pool
1st-best month of the year

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

What to pack for New London in August

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

In August, New London sees daytime highs around 74°F and nights near 68°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near New London in August

The nearest coast averages about 71°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 16 mi away) is warmest in August at about 71°F and coldest in February near 39°F.

It's comfortable for a long swim from Jul 15 to Sep 15 — about 2.1 months when the water holds above 68°F.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan42Bracing
Feb39Bracing
Mar39Bracing
Apr44Bracing
May52Bracing
Jun61Cool
Jul69Refreshing
Aug71Refreshing
Sep68Refreshing
Oct63Cool
Nov55Bracing
Dec48Bracing

UV index in New London in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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 New London peaks around July 10 at about 8 (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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 10UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in New London 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 New London is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (November, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1515 µg/m³Nov 206 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar11Good
Apr12Good
May14Moderate
Jun14Moderate
Jul15Moderate
Aug13Moderate
Sep10Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is New London?

New London sits at 41.4°N, 72.1°W, 56 ft above sea level, in United States. The nearest listed city is Waterford, 1.9 mi away.

Topography around New London

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

Within 2 miles, the terrain around New London has only modest variations in elevation — a maximum elevation change of 266 ft around an average of 82 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 656 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,325 ft.

The land around New London is covered by trees (41%) and artificial surfaces (29%) within 2 miles, trees (55%) and water (35%) within 10 miles, and trees (49%) and water (44%) within 50 miles.

2 miles
266 ft
10 miles
656 ft
50 miles
1,325 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Waterford 1.9 mi · Ledyard 7.5 mi · Montville Center 8.7 mi · Norwich 12 mi · Westerly 14 mi · Windham 24 mi · Plainfield 24 mi · Willimantic 25 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 New London (41.3556°, -72.0995°, elevation 56 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).