Southbury weather in March

In March, Southbury sees average daytime highs of 46°F and overnight lows near 31°F, with 4.2 in of precipitation across 11.2 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 42°F in the first days to 51°F by the end. The sky is clear or mostly clear about 27% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Southbury's 9th-clearest and 1st-windiest month. For the whole year in context, see Southbury's year-round climate.

Daytime high
46°
9th warmest
Overnight low
31°
4th coldest
Precipitation
4.2 in
11.2 wet days
Daylight
11 h 42 min
6:13 AM – 5:52 PM
Cloud cover
63%
9th clearest
Wind
8 mph
1st windiest
Solar energy
4.01 kWh/m²
Travel score
1.2
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 March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 42°F in the first days to 51°F by the end.

A typical March day in Southbury reaches about 46°F in the afternoon and slips back to 31°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 34°F and 59°F. Set against its neighbours, March runs about 8°F warmer than February and about 12°F cooler than April.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14126
24227
34227
44227
54227
64328
74328
84328
94428
104429
114429
124429
134529
144530
154530
164630
174630
184631
194631
204731
214732
224732
234833
244833
254933
264934
275034
285035
295135
305135
315136

How March really feels in Southbury

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 31 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
31
wind chill below the day's low

The story in March is cold — wind chill drags the overnight "feels like" below the raw low.

Southbury weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 3rd-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 March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 15% of March, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24357
34258
44357
54357
64357
74357
84357
94357
104357
114456
124357
134357
144258
154258
164258
174258
184159
194159
204258
214258
224258
234258
244159
254159
264258
274159
284159
294159
304159
314159

Chance of precipitation in March

Any precipitationSnow

Southbury gets around 4.2 in of rain and snow over 11.2 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 36% and peaks near 39% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13617
23717
33716
43716
53716
63715
73715
83615
93614
103514
113514
123513
133413
143413
153413
163413
173413
183412
193412
203412
213412
223511
233511
243611
253710
263710
27389
28389
29388
30388
31398

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
26991
27991
28991
29991
30991
31991

Wind in March

Winds average 8 mph in March, the windiest month of the year.

Across March, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 hours at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over March. Sunrise moves from 6:37 AM to 5:47 AM, and sunset from 5:35 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:375:35
211.06:365:36
311.06:345:37
411.16:335:38
511.16:315:40
611.26:305:41
711.26:285:42
811.36:265:43
911.36:255:44
1011.46:235:45
1111.46:215:46
1211.56:205:48
1311.56:185:49
1411.66:165:50
1511.66:155:51
1611.76:135:52
1711.76:115:53
1811.86:095:54
1911.86:085:56
2011.86:065:57
2111.96:045:58
2211.96:025:59
2312.06:016:00
2412.05:596:01
2512.15:576:02
2612.15:566:03
2712.25:546:04
2812.25:526:06
2912.35:506:07
3012.35:496:08
3112.45:476:09

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.01 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 — March's 4.01 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.6Moderate
53.6Moderate
63.7Moderate
73.7Moderate
83.8Moderate
93.8Moderate
103.9Moderate
113.9Moderate
123.9Moderate
134.0Moderate
144.0Bright
154.0Bright
164.1Bright
174.1Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.4Bright
294.4Bright
304.4Bright
314.5Bright
Planning a trip in March

Hazard calendar for Southbury

In seasonPeak

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

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 March a good time to visit Southbury?

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

1.2
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

March is a weaker month for outdoor sightseeing in Southbury.

What to pack for Southbury in March

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

In March, Southbury sees daytime highs around 46°F and nights near 31°F. Pack a warm layer. Worth having: a heavy coat and rain gear. About 11 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Southbury in March

The nearest coast averages about 37°F in March — 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 March

LowModerateHighVery highExtreme

Clear-sky midday UV in March 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 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 March

GoodModeratePoorUnhealthyVery unhealthy

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