Darien weather in January

In January, Darien sees average daytime highs of 37°F and overnight lows near 26°F, with 3.3 in of precipitation across 9 wet days and about 9.4 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 37°F through the month. The sky is clear or mostly clear about 34% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 06 min at the start of January to 9 h 48 min by month's end. Set against the rest of the year, January is Darien's 7th-clearest and 1st-windiest month. For the whole year in context, see Darien's year-round climate.

Daytime high
37°
12th warmest
Overnight low
26°
1st coldest
Precipitation
3.3 in
9 wet days
Daylight
9 h 24 min
7:23 AM – 4:44 PM
Cloud cover
59%
7th clearest
Wind
9 mph
1st windiest
Solar energy
2.12 kWh/m²
Travel score
0.0
out of 10

Darien is town in Fairfield County, Connecticut, United States.

Founded
1820

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 37°F through the month.

A typical January day in Darien reaches about 37°F in the afternoon and slips back to 26°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 25°F and 49°F. Set against its neighbours, January runs about 5°F cooler than December and about 2°F cooler than February.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14029
23929
33929
43929
53928
63828
73828
83828
93828
103827
113827
123827
133727
143726
153726
163726
173726
183726
193726
203725
213725
223725
233725
243725
253725
263725
273725
283725
293725
303725
313725

How January really feels in Darien

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Darien weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 26°3.394.69.40.0
Feb39° / 27°3.18.6410.40.0
Mar46° / 34°4.110.33.411.71.2
Apr57° / 44°3.610.50.413.13.9
May67° / 54°3.410.9014.35.9
Jun76° / 64°3.710.8014.96.6
Jul82° / 70°3.610.8014.76.3
Aug80° / 69°4.110.5013.66.5
Sep73° / 62°3.79012.37.0
Oct62° / 51°4.08.5010.95.6
Nov52° / 41°3.28.50.49.72.9
Dec43° / 33°4.19.82.79.10.5

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35050
44951
54951
64951
74951
84852
94852
104852
114852
124852
134951
144852
154852
164852
174951
184852
194852
204852
214852
224852
234852
244852
254951
264951
274951
284852
294951
304951
314951

Chance of precipitation in January

Any precipitationSnow

Darien gets around 3.3 in of rain and snow over 9 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 33% on the wettest days, and about 5 days bring snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13112
23113
33213
43214
53214
63315
73315
83316
93316
103216
113216
123216
133116
143116
153016
163015
172915
182915
192815
202815
212715
222614
232614
242614
252514
262514
272514
282514
292614
302614
312614

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 9 mph in January, the windiest month of the year.

Across January, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 06 min at the start of January to 9 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over January. Sunrise moves from 7:24 AM to 7:13 AM, and sunset from 4:30 PM to 5:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.17:244:30
29.17:244:31
39.17:254:31
49.17:254:32
59.17:254:33
69.27:254:34
79.27:254:35
89.27:254:36
99.27:244:37
109.27:244:38
119.27:244:39
129.37:244:40
139.37:244:41
149.37:234:42
159.37:234:43
169.47:234:44
179.47:224:45
189.47:224:46
199.47:214:47
209.57:214:48
219.57:204:49
229.57:204:50
239.57:194:51
249.67:194:53
259.67:184:54
269.67:174:55
279.77:174:56
289.77:164:57
299.77:154:59
309.87:145:00
319.87:135:01

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.12 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 6.1 kWh/m² in June across the year — January's 2.12 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.8Dim
51.9Dim
61.9Dim
71.9Dim
81.9Dim
91.9Dim
101.9Dim
112.0Dim
122.0Dim
132.0Moderate
142.0Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.2Moderate
202.2Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.4Moderate
252.4Moderate
262.4Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.6Moderate
Planning a trip in January

Hazard calendar for Darien

In seasonPeak

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

Darien 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 January a good time to visit Darien?

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

0.0
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Darien.

What to pack for Darien in January

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

In January, Darien sees daytime highs around 37°F and nights near 26°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Darien in January

The nearest coast averages about 39°F in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore 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 Darien in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Darien 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 Darien in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Darien 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 Darien?

Darien sits at 41.1°N, 73.5°W, 46 ft above sea level, in United States. The nearest listed city is Stamford, 3.7 mi away.

Topography around Darien

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

Within 2 miles, the terrain around Darien has only modest variations in elevation — a maximum elevation change of 289 ft around an average of 92 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 692 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,909 ft.

The land around Darien is covered by trees (74%) within 2 miles, trees (48%) and water (43%) within 10 miles, and trees (54%) and water (31%) within 50 miles.

2 miles
289 ft
10 miles
692 ft
50 miles
1,909 ft
treesgrasslandartificial surfaceswaterwetland
January weather nearby: Stamford 3.7 mi · East Norwalk 4.3 mi · Norwalk 4.3 mi · New Canaan 5.0 mi · North Stamford 5.6 mi · Westport 7.5 mi · Wilton 8.1 mi · Port Chester 12 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 Darien (41.0787°, -73.4693°, elevation 46 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).