Danbury weather in May

In May, Danbury sees average daytime highs of 68°F and overnight lows near 50°F, with 3.9 in of rain across 12 wet days and about 14.3 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 64°F in the first days to 72°F by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 42 min by month's end. Set against the rest of the year, May is Danbury's 12th-clearest and 8th-windiest month. For the whole year in context, see Danbury's year-round climate.

Daytime high
68°
5th warmest
Overnight low
50°
8th coldest
Rainfall
3.9 in
12 wet days
Daylight
14 h 18 min
4:41 AM – 7:00 PM
Cloud cover
65%
12th clearest
Wind
6 mph
8th windiest
Solar energy
5.56 kWh/m²
Travel score
5.9
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 64°F in the first days to 72°F by the end.

A typical May day in Danbury reaches about 68°F in the afternoon and slips back to 50°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 80°F. Set against its neighbours, May runs about 10°F warmer than April and about 9°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16346
26446
36446
46447
56547
66547
76547
86548
96648
106648
116649
126649
136749
146749
156750
166850
176850
186851
196951
206951
216951
227052
237052
247153
257153
267153
277254
287254
297254
307355
317355

How May really feels in Danbury

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24159
34159
44258
54258
64258
74258
84159
94159
104060
114060
124060
134060
144060
153961
163961
174060
184060
194060
204060
214060
224060
234159
244159
254159
264159
274258
284258
294258
304258
314258

Chance of precipitation in May

Any precipitation

Danbury gets around 3.9 in of rain over 12 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
539
639
739
839
939
1039
1139
1239
1339
1438
1538
1638
1738
1838
1938
2039
2139
2239
2339
2439
2539
2639
2739
2839
2939
3040
3140

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
193520
292620
392620
492620
590730
690730
789830
888840
987940
1087940
1186950
12851050
13851050
14831160
15831160
16821170
17801271
18781381
19781381
20761491
217414102
227315102
237115113
246816124
256816124
266716134
276517135
286417145
296218146
306119146
316019147

Wind in May

Winds average 6 mph in May.

Across May, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 min at the start of May to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 4:58 AM to 4:29 AM, and sunset from 6:44 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:586:44
213.84:576:45
313.84:566:46
413.94:546:47
513.94:536:48
614.04:526:49
714.04:516:50
814.04:496:51
914.14:486:52
1014.14:476:53
1114.14:466:54
1214.24:456:55
1314.24:446:57
1414.24:436:58
1514.34:426:59
1614.34:417:00
1714.44:407:01
1814.44:397:02
1914.44:387:03
2014.44:377:04
2114.54:367:05
2214.54:357:05
2314.54:347:06
2414.64:347:07
2514.64:337:08
2614.64:327:09
2714.64:317:10
2814.74:317:11
2914.74:307:12
3014.74:307:13
3114.74:297:13

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.56 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 — May's 5.56 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Hazard calendar for Danbury

In seasonPeak

None of Danbury's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 May a good time to visit Danbury?

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

5.9
Sightseeing
4th-best month of the year
3.1
Beach & pool
5th-best month of the year

May is a reasonable time to visit Danbury for sightseeing.

What to pack for Danbury in May

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

In May, Danbury sees daytime highs around 68°F and nights near 50°F. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Danbury in May

The nearest coast averages about 55°F in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).