Green Haven weather in January

In January, Green Haven sees average daytime highs of 40°F and overnight lows near 30°F, with 3.6 in of precipitation across 9 wet days and about 9.6 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 40°F through the month. The sky is clear or mostly clear about 32% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 18 min at the start of January to 9 h 54 min by month's end. Set against the rest of the year, January is Green Haven's 7th-clearest and 1st-windiest month. For the whole year in context, see Green Haven's year-round climate.

Daytime high
40°
12th warmest
Overnight low
30°
1st coldest
Precipitation
3.6 in
9 wet days
Daylight
9 h 30 min
7:29 AM – 5:01 PM
Cloud cover
59%
7th clearest
Wind
10 mph
1st windiest
Solar energy
2.21 kWh/m²
Travel score
0.0
out of 10

Green Haven is neighborhood of Pasadena, Maryland, United States.

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 40°F through the month.

A typical January day in Green Haven reaches about 40°F in the afternoon and slips back to 30°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 29°F and 51°F. Set against its neighbours, January runs about 5°F cooler than December and about 2°F cooler than February.

20°30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14232
24232
34232
44232
54231
64231
74131
84131
94131
104131
114130
124030
134030
144030
154029
164029
174029
184029
194029
203929
213929
223928
233928
243928
253928
264028
274028
284029
294029
304029
314029

How January really feels in Green Haven

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.

Green Haven weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 30°3.692.79.60.0
Feb42° / 31°3.39.13.110.50.4
Mar50° / 37°4.510.52.111.72.2
Apr61° / 47°3.810.40.2134.9
May70° / 57°3.811014.16.3
Jun79° / 67°3.510.9014.76.5
Jul84° / 72°3.811.4014.55.5
Aug82° / 71°3.610.4013.56.1
Sep76° / 64°4.79.4012.37.0
Oct65° / 53°4.08.40116.2
Nov54° / 42°3.48.30.29.93.5
Dec45° / 35°4.39.61.69.31.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35050
45050
55050
64951
74951
84852
94852
104852
114753
124753
134753
144753
154753
164753
174753
184753
194654
204654
214753
224753
234753
244852
254852
264753
274753
284852
294852
304852
314852

Chance of precipitation in January

Any precipitationSnow

Green Haven gets around 3.6 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 31% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1296
2307
3307
4307
5307
6317
7317
8317
9318
10318
11318
12318
13318
14319
15319
16309
17309
18309
19299
202910
212810
222810
232810
242710
252711
262711
272711
282711
292711
302811
312811

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 10 mph in January, the windiest month of the year.

Across January, daily wind ranges from about 9 mph on the calmest days to 10 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
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 18 min at the start of January to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:31 AM to 7:21 AM, and sunset from 4:48 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.37:314:48
29.37:314:49
39.37:314:50
49.37:314:50
59.37:314:51
69.47:314:52
79.47:314:53
89.47:314:54
99.47:314:55
109.47:314:56
119.47:314:57
129.57:304:58
139.57:304:58
149.57:304:59
159.57:305:00
169.57:295:01
179.67:295:02
189.67:295:04
199.67:285:05
209.67:285:06
219.77:285:07
229.77:275:08
239.77:265:09
249.77:265:10
259.87:255:11
269.87:255:12
279.87:245:13
289.87:235:14
299.97:235:16
309.97:225:17
319.97:215:18

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.21 kWh/m².

For context, solar energy here swings from a low near 1.9 kWh/m² to a high of 6.07 kWh/m² in June across the year — January's 2.21 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Dim
22.0Dim
32.0Dim
42.0Dim
52.0Dim
62.0Moderate
72.0Moderate
82.0Moderate
92.0Moderate
102.0Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in January

Hazard calendar for Green Haven

In seasonPeak

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

Green Haven 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 Green Haven?

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

0.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Green Haven.

What to pack for Green Haven in January

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

In January, Green Haven sees daytime highs around 40°F and nights near 30°F. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Green Haven in January

The nearest coast averages about 38°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 9 mi away) is warmest in August at about 78°F and coldest in February near 36°F.

It's comfortable for a long swim from Jun 16 to Oct 5 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov53Bracing
Dec44Bracing

UV index in Green Haven 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 Green Haven peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Green Haven 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 Green Haven is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Green Haven?

Green Haven sits at 39.1°N, 76.5°W, 49 ft above sea level, in United States. The nearest listed city is Pasadena, 1.9 mi away.

Topography around Green Haven

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

Within 2 miles, the terrain around Green Haven has only modest variations in elevation — a maximum elevation change of 207 ft around an average of 69 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 312 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,283 ft.

The land around Green Haven is covered by trees (68%) within 2 miles, trees (46%) and water (30%) within 10 miles, and trees (52%) within 50 miles.

2 miles
207 ft
10 miles
312 ft
50 miles
1,283 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Pasadena 1.9 mi · Lake Shore 3.7 mi · South Gate 4.3 mi · Glen Burnie 4.3 mi · Severna Park 5.0 mi · Ferndale 5.6 mi · Arnold 8.1 mi · Dundalk 8.1 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 Green Haven (39.1395°, -76.5477°, elevation 49 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).