Danbury weather in August

In August, Danbury sees average daytime highs of 80°F and overnight lows near 64°F, with 4.5 in of rain across 10.9 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 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 humid.

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

Daytime high
80°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
4.5 in
10.9 wet days
Daylight
13 h 42 min
5:08 AM – 6:48 PM
Cloud cover
58%
3rd clearest
Wind
5 mph
12th windiest
Solar energy
5.24 kWh/m²
Travel score
6.4
out of 10

Danbury is city in Fairfield County, Connecticut, United States.

Density
740/km²
people per km²
Founded
1702

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 Danbury reaches about 80°F in the afternoon and slips back to 64°F overnight — a 17°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)
18265
28265
38265
48265
58265
68265
78265
88265
98165
108165
118165
128164
138164
148164
158064
168064
178064
188064
198063
208063
218063
228063
237963
247962
257962
267962
277962
287962
297962
307861
317861

How August really feels in Danbury

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.

Danbury 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
Jan35° / 21°3.59.45.79.40.0
Feb38° / 22°3.08.74.910.30.0
Mar46° / 30°4.211.14.211.71.2
Apr58° / 40°3.811.30.913.14.1
May68° / 50°3.912014.35.9
Jun77° / 60°4.412014.96.4
Jul82° / 65°4.311.3014.75.9
Aug80° / 64°4.510.9013.76.4
Sep73° / 56°4.39.4012.36.9
Oct61° / 45°4.29.40.210.95.2
Nov50° / 35°3.48.71.29.72.3
Dec40° / 27°4.110.54.59.10.1

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 19% of August, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25149
35149
45149
55050
65050
74951
84951
94951
104951
114753
124852
134753
144753
154852
164852
174852
184852
194951
204951
215050
225050
235149
245149
255248
265248
275248
285248
295248
305248
315248

Chance of precipitation in August

Any precipitation

Danbury gets around 4.5 in of rain over 10.9 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 36% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
738
838
939
1039
1139
1239
1339
1439
1539
1638
1738
1837
1936
2036
2135
2234
2333
2432
2531
2630
2730
2829
2929
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 (%)
11520292610
21520292610
31621282510
41621282510
51621282510
61621282510
71621282510
81621272510
91721272510
101721272510
11172127259
12172127259
13182227258
14182227258
15182227258
16182227257
17192227257
18192327247
19202327246
20212326246
21222426236
22222425235
23232425225
24242524215
25252524215
26262524205
27272523195
28282523185
29292523185
30302523175
31312523175

Wind in August

Winds average 5 mph in August, the calmest month.

Across August, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 4:52 AM to 5:23 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)
114.24:527:07
214.24:537:06
314.24:547:05
414.14:557:04
514.14:567:03
614.14:577:02
714.04:587:00
814.04:596:59
914.05:006:58
1013.95:016:56
1113.95:026:55
1213.85:046:54
1313.85:056:52
1413.85:066:51
1513.75:076:50
1613.75:086:48
1713.65:096:47
1813.65:106:45
1913.55:116:44
2013.55:126:42
2113.55:136:41
2213.45:146:39
2313.45:156:38
2413.35:166:36
2513.35:176:34
2613.25:186:33
2713.25:196:31
2813.25:206:29
2913.15:216:28
3013.15:226:26
3113.05:236:24

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.24 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 6 kWh/m² in June across the year — August's 5.24 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.9Bright
314.8Bright
Planning a trip in August

Hazard calendar for Danbury

In seasonPeak

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

Danbury 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 Danbury?

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

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

What to pack for Danbury in August

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

In August, Danbury 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 Danbury 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 19 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 Jun 30 to Sep 30 — about 3.1 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
May55Bracing
Jun65Cool
Jul72Refreshing
Aug74Refreshing
Sep71Refreshing
Oct64Cool
Nov55Bracing
Dec46Bracing

UV index in Danbury 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 Danbury 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
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Danbury 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 Danbury 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 Danbury?

Danbury sits at 41.4°N, 73.5°W, 397 ft above sea level, in United States. The nearest listed city is Wilton, 14 mi away.

Topography around Danbury

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

Within 2 miles, the terrain around Danbury has only modest variations in elevation — a maximum elevation change of 663 ft around an average of 486 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,243 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,822 ft.

The land around Danbury is covered by trees (62%) and artificial surfaces (26%) within 2 miles, trees (83%) within 10 miles, and trees (72%) within 50 miles.

2 miles
663 ft
10 miles
1,243 ft
50 miles
2,822 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Wilton 14 mi · Southbury 14 mi · Trumbull 17 mi · New Canaan 17 mi · Westport 18 mi · North Stamford 18 mi · Norwalk 19 mi · Shelton 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 Danbury (41.3948°, -73.454°, elevation 397 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).