Derry weather in January

In January, Derry sees average daytime highs of 33°F and overnight lows near 17°F, with 3.1 in of precipitation across 9.3 wet days and about 9.2 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°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 8 h 54 min at the start of January to 9 h 36 min by month's end. Set against the rest of the year, January is Derry's 4th-clearest and 3rd-windiest month. For the whole year in context, see Derry's year-round climate.

Daytime high
33°
12th warmest
Overnight low
17°
1st coldest
Precipitation
3.1 in
9.3 wet days
Daylight
9 h 12 min
7:20 AM – 4:30 PM
Cloud cover
57%
4th clearest
Wind
7 mph
3rd windiest
Solar energy
1.95 kWh/m²
Travel score
0.0
out of 10

Derry is census-designated place in New Hampshire, United States.

Density
549/km²
people per km²

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 33°F through the month.

A typical January day in Derry reaches about 33°F in the afternoon and slips back to 17°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 18°F and 47°F. Set against its neighbours, January runs about 5°F cooler than December and about 3°F cooler than February.

20°40°151015202531
Avg high (°F)Avg low (°F)
13420
23419
33419
43419
53419
63319
73318
83318
93318
103318
113317
123317
133317
143217
153217
163216
173216
183216
193216
203216
213216
223216
233216
243216
253216
263216
273216
283216
293316
303316
313316

How January really feels in Derry

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
31 feel bitter (≤ 14°F)

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

Derry 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
Jan33° / 17°3.19.36.49.20.0
Feb35° / 18°3.08.66.310.20.0
Mar44° / 27°4.010.75.411.60.7
Apr56° / 38°3.810.41.513.13.8
May67° / 48°3.010.30.114.46.0
Jun77° / 58°3.511.1015.16.5
Jul82° / 63°3.310014.86.0
Aug81° / 61°3.29013.86.7
Sep73° / 54°3.38.1012.37.0
Oct60° / 43°3.99.50.310.85.0
Nov48° / 33°3.49.21.49.51.9
Dec38° / 24°4.110.15.18.90.0

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 17% of January, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55149
65050
75050
84951
95050
105050
114951
125050
135050
145050
155050
165248
175248
185248
195248
205248
215248
225248
235347
245347
255347
265347
275347
285347
295347
305347
315347

Chance of precipitation in January

Any precipitationSnow

Derry gets around 3.1 in of rain and snow over 9.3 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 30% and peaks near 32% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13219
23219
33220
43220
53221
63221
73221
83222
93222
103222
113223
123223
133223
143223
153123
163123
173122
183022
193022
202921
212921
222821
232820
242820
252720
262720
272719
282719
292719
302719
312820

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 7 mph in January.

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

0246810151015202531
Wind speed (mph)Feels
17light breeze
27light breeze
37light breeze
47light breeze
57light breeze
67light breeze
77light breeze
87light breeze
97light breeze
107light breeze
117light breeze
127light breeze
137light breeze
147light breeze
157light breeze
167light breeze
177light breeze
187light breeze
197light breeze
207light breeze
217light breeze
227light breeze
237light breeze
247light breeze
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 54 min at the start of January to 9 h 36 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 7:22 AM to 7:09 AM, and sunset from 4:15 PM to 4:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.97:224:15
28.97:224:16
38.97:224:17
48.97:224:18
58.97:224:19
69.07:224:19
79.07:224:20
89.07:224:21
99.07:224:22
109.07:214:23
119.17:214:24
129.17:214:25
139.17:214:26
149.17:204:27
159.17:204:29
169.27:204:30
179.27:194:31
189.27:194:32
199.37:184:33
209.37:184:34
219.37:174:35
229.37:164:37
239.47:164:38
249.47:154:39
259.47:144:40
269.57:144:42
279.57:134:43
289.57:124:44
299.67:114:45
309.67:104:47
319.67:094:48

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.95 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 5.88 kWh/m² in July across the year — January's 1.95 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.7Dim
31.7Dim
41.7Dim
51.7Dim
61.7Dim
71.7Dim
81.7Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.9Dim
151.9Dim
161.9Dim
171.9Dim
182.0Dim
192.0Moderate
202.0Moderate
212.1Moderate
222.1Moderate
232.1Moderate
242.2Moderate
252.2Moderate
262.3Moderate
272.3Moderate
282.3Moderate
292.4Moderate
302.4Moderate
312.4Moderate
Planning a trip in January

Hazard calendar for Derry

In seasonPeak

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

Derry 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 Derry?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Derry.

What to pack for Derry in January

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

In January, Derry sees daytime highs around 33°F and nights near 17°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 Derry in January

The nearest coast averages about 42°F in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 mi away) is warmest in August at about 65°F and coldest in March near 39°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan42Bracing
Feb40Bracing
Mar39Bracing
Apr42Bracing
May49Bracing
Jun57Bracing
Jul64Cool
Aug65Cool
Sep62Cool
Oct56Bracing
Nov49Bracing
Dec46Bracing

UV index in Derry in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Derry peaks around July 10 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 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 highHighHighModerateLowJul 10UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun7High
Jul7Very high
Aug5Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Derry 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 Derry is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1715 µg/m³Nov 188 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar13Moderate
Apr13Moderate
May14Moderate
Jun13Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Derry?

Derry sits at 42.9°N, 71.3°W, 276 ft above sea level, in United States. The nearest listed city is Derry Village, 1.2 mi away.

Topography around Derry

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

Within 2 miles, the terrain around Derry has only modest variations in elevation — a maximum elevation change of 325 ft around an average of 351 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 584 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,176 ft.

The land around Derry is covered by trees (68%) within 2 miles, trees (80%) within 10 miles, and trees (75%) within 50 miles.

2 miles
325 ft
10 miles
584 ft
50 miles
3,176 ft
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Derry Village 1.2 mi · Merrimack 8.7 mi · Salem 9.3 mi · Manchester 9.9 mi · Bedford 11 mi · Nashua 11 mi · Methuen 12 mi · Haverhill 14 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 Derry (42.8806°, -71.3273°, elevation 276 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).