Southbury weather in August

In August, Southbury sees average daytime highs of 80°F and overnight lows near 64°F, with 4.3 in of rain across 10.6 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 82°F in the first days to 79°F by the end. The sky is clear or mostly clear about 30% of the time in August, and the air most often feels humid.

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 Southbury's 4th-clearest and 12th-windiest month. For the whole year in context, see Southbury's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
4.3 in
10.6 wet days
Daylight
13 h 42 min
5:07 AM – 6:47 PM
Cloud cover
58%
4th clearest
Wind
6 mph
12th windiest
Solar energy
5.3 kWh/m²
Travel score
6.4
out of 10

Southbury is town in New Haven County, Connecticut, United States.

Density
191/km²
people per km²
Founded
1787

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 79°F by the end.

A typical August day in Southbury reaches about 80°F in the afternoon and slips back to 64°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 88°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18266
28266
38266
48265
58265
68265
78265
88265
98165
108165
118165
128165
138165
148164
158064
168064
178064
188064
198064
208064
218063
228063
238063
247963
257963
267962
277962
287962
297962
307862
317862

How August really feels in Southbury

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.

Southbury weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan36° / 22°3.59.45.79.30.0
Feb38° / 23°3.18.85.110.30.0
Mar46° / 31°4.211.24.111.71.2
Apr58° / 41°3.811.3113.14.0
May67° / 50°3.612.1014.35.9
Jun77° / 60°4.112014.96.4
Jul82° / 65°3.911.1014.75.9
Aug80° / 64°4.310.6013.76.4
Sep73° / 57°4.19.2012.36.9
Oct62° / 46°4.29.10.210.95.3
Nov50° / 36°3.58.819.72.4
Dec40° / 28°4.210.34.39.10.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45050
55050
65050
75050
85050
94852
104852
114753
124852
134852
144852
154753
164852
174852
184951
194951
205050
215149
225149
235149
245149
255248
265248
275248
285248
295248
305248
315149

Chance of precipitation in August

Any precipitation

Southbury gets around 4.3 in of rain over 10.6 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
537
637
737
838
938
1038
1138
1238
1338
1438
1538
1637
1736
1836
1935
2034
2133
2232
2331
2430
2530
2629
2728
2828
2928
3028
3128

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 26% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11619292610
21619292610
31620282510
41720282510
51720282510
61720282510
71720282510
81720282510
91820272510
101820272510
111820272510
121820272510
13182027259
14182127259
15192127259
16192127249
17192127248
18202227248
19202227238
20212226238
21222326227
22232325227
23242325217
24252424207
25262424207
26272423196
27282423186
28292423186
29302423176
30312422176
31322422176

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 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 4:51 AM to 5:22 AM, and sunset from 7:07 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:517:07
214.24:527:06
314.24:537:04
414.24:547:03
514.14:557:02
614.14:567:01
714.04:577:00
814.04:586:58
914.04:596:57
1013.95:006:56
1113.95:016:54
1213.85:026:53
1313.85:036:52
1413.85:046:50
1513.75:066:49
1613.75:076:47
1713.65:086:46
1813.65:096:44
1913.65:106:43
2013.55:116:41
2113.55:126:40
2213.45:136:38
2313.45:146:37
2413.35:156:35
2513.35:166:33
2613.25:176:32
2713.25:186:30
2813.25:196:29
2913.15:206:27
3013.15:216:25
3113.05:226:24

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.3 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 6.06 kWh/m² in June across the year — August's 5.3 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in August

Hazard calendar for Southbury

In seasonPeak

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

Southbury 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 Southbury?

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

6.4
Sightseeing
2nd-best month of the year
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Southbury in August

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

In August, Southbury sees daytime highs around 80°F and nights near 64°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Southbury in August

The nearest coast averages about 74°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 25 mi away) is warmest in August at about 74°F and coldest in February near 35°F.

It's comfortable for a long swim from Jul 1 to Sep 30 — about 3 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb35Bracing
Mar37Bracing
Apr44Bracing
May54Bracing
Jun65Cool
Jul72Refreshing
Aug74Refreshing
Sep71Refreshing
Oct64Cool
Nov55Bracing
Dec46Bracing

UV index in Southbury 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 Southbury peaks around July 11 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 highHighModerateLowJul 11UV 8Dec 23UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun7Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Southbury 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 Southbury is worst in July — around 20 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJul 1220 µg/m³Nov 1612 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar17Moderate
Apr17Moderate
May18Moderate
Jun19Moderate
Jul20Moderate
Aug17Moderate
Sep16Moderate
Oct13Moderate
Nov11Good
Dec13Moderate
Location & terrain

Where is Southbury?

Southbury sits at 41.5°N, 73.2°W, 249 ft above sea level, in United States. The nearest listed city is Naugatuck, 8.7 mi away.

Topography around Southbury

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

Within 2 miles, the terrain around Southbury has only modest variations in elevation — a maximum elevation change of 633 ft around an average of 407 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,050 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,815 ft.

The land around Southbury is covered by trees (86%) within 2 miles, trees (85%) within 10 miles, and trees (74%) within 50 miles.

2 miles
633 ft
10 miles
1,050 ft
50 miles
2,815 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Naugatuck 8.7 mi · Seymour 9.3 mi · Waterbury 9.9 mi · Ansonia 12 mi · Shelton 13 mi · Danbury 14 mi · Wolcott 14 mi · Cheshire 16 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 Southbury (41.4815°, -73.2132°, elevation 249 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).