January weather forecast
Rock Hall, MD

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Weather in January

January, like December, in Rock Hall, Maryland, is a wintry winter month, with an average temperature varying between 28.4°F (-2°C) and 39.2°F (4°C).

Temperature

Rock Hall's January weather, with an average high temperature of 39.2°F (4°C) and an average low temperature of 28.4°F (-2°C), tends to be the coldest of the year.

Humidity

In Rock Hall, the average relative humidity in January is 74%.

Rainfall

January is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.55" (14mm) of precipitation.

Snowfall

Months with snowfall are January through April and December. January is the month with the most snowfall. Snow falls for 3 days and accumulates 0.83" (21mm) of snow.

Ocean temperature

In January, the average ocean temperature is 45.1°F (7.3°C).
Note: Swimming in 45.1°F (7.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in January is 9h and 47min.
On the first day of the month, sunrise is at 7:24 am and sunset at 4:52 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:24 pm EST.

Sunshine

The average sunshine in January in Rock Hall is 5.3h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in January converts into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
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Frequently asked questions

What time of the year is the coldest in Rock Hall?

January is the month that records the lowest temperatures in Rock Hall, Maryland, with averages ranging from a high of 39.2°F (4°C) to a low of 28.4°F (-2°C).

Is it cold in Rock Hall during January?

The high-temperature, in January, in Rock Hall, records 39.2°F (4°C), while the low-temperature is 28.4°F (-2°C).

What is the average humidity in January in Rock Hall?

The average relative humidity in January in Rock Hall, Maryland, is 74%.

What is the driest month in Rock Hall?

January is the month with the least rainfall in Rock Hall. Rain falls for 6.8 days and accumulates 0.55" (14mm) of precipitation.

How many days does it rain in January in Rock Hall?

In Rock Hall, during January, the rain falls for 6.8 days and regularly aggregates up to 0.55" (14mm) of precipitation.

What is the snowiest month in Rock Hall?

The month with the most snowfall in Rock Hall, Maryland, is January, when snow falls for 3 days and typically aggregates up to 0.83" (21mm) of snow.

How many days does it snow in January in Rock Hall?

In Rock Hall, during January, snow falls for 3 days and regularly aggregates up to 0.83" (21mm) of snow.

How cold is the water in January in Rock Hall?

In Rock Hall, in January, the average water temperature is 45.1°F (7.3°C). Swimming in 45.1°F (7.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in January in Rock Hall?

The average day length in January is 9h and 47min.

What time are sunrise and sunset in January in Rock Hall?

In January, on the first day of the month, sunrise is at 7:24 am and sunset at 4:52 pm. On the last day of the month, in Rock Hall, Maryland, sunrise is at 7:12 am and sunset at 5:24 pm EST.

How many hours of sunshine does Rock Hall have in January?

The average sunshine duration in January in Rock Hall, Maryland, is 5.3h.

What are the months with the lowest UV index in Rock Hall?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Rock Hall.

What is the UV index intensity in January in Rock Hall?

The average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
45.5°F 7.5°C
39.2°F 4°C
42.6°F 5.9°C
Average low temperature
34.9°F 1.6°C
28.4°F -2°C
30.6°F -0.8°C
Average pressure
30.11" 765mmHg
30.1" 765mmHg
30.07" 764mmHg
Average wind speed
9mph 14.5km/h
9.8mph 15.8km/h
9.8mph 15.8km/h
Average max. wind speed
9.8mph 15.8km/h
10.6mph 17.1km/h
10.6mph 17.1km/h
Average wind speed gusts
15mph 24.1km/h
16.1mph 25.9km/h
16.3mph 26.2km/h
Average humidity
76%
74%
75%
Average rainfall
1.02" 26mm
0.55" 14mm
0.79" 20mm
Average rainfall days
7.8
6.8
6.8
Average snowfall
0.12" 3mm
0.83" 21mm
0.43" 11mm
Average snowfall days
1.5
3
2.7
Average sea temperature
50.6°F 10.3°C
45.1°F 7.3°C
43.7°F 6.5°C
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
5h 1min
5h 2min
5h 1min
Average sunshine days
21
21.9
18.4
Average UV index
2
2
2
Average cloud cover
44%
43%
44%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Rock Hall, MD

Average temperature in January - Rock Hall, MD
  • Average high temperature in January: 39.2°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (39.2°F).

  • Average low temperature in January: 28.4°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

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Average pressure in January
Rock Hall, MD

Average pressure in January - Rock Hall, MD
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in January
Rock Hall, MD

Average wind speed in January - Rock Hall, MD
  • Average wind speed in January: 9.8mph

The windiest months (with the highest average wind speed) are January, February and March (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in January
Rock Hall, MD

Average humidity in January - Rock Hall, MD
  • Average humidity in January: 74%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is November (73%).

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Average rainfall in January
Rock Hall, MD

Average rainfall in January - Rock Hall, MD
  • Average rainfall in January: 0.55"

The wettest months (with the highest rainfall) are July and August (1.81").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in January
Rock Hall, MD

Average rainfall days in January - Rock Hall, MD
  • Average rainfall days in January: 6.8 days

The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is November (5.6 days).

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Average snowfall in January
Rock Hall, MD

Average snowfall in January - Rock Hall, MD
  • Average snowfall in January: 0.83"

The month with the highest snowfall is January (0.83").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in January
Rock Hall, MD

Average snowfall days in January - Rock Hall, MD
  • Average snowfall days in January: 3 days

The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in January
Rock Hall, MD

Average sea temperature in January - Rock Hall, MD
  • Average sea temperature in January: 45.1°F

The best month for swimming (with the highest average sea temperature) is August (77.2°F).
The coldest month (with the lowest average sea temperature) is February (43.7°F).

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Average daylight in January /
Average sunshine in January
Rock Hall, MD

Average daylight in January / Average sunshine in January - Rock Hall, MD
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 5h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in January
Rock Hall, MD

Average sunshine days in January - Rock Hall, MD
  • Average sunshine days in January: 21.9 days

The months with the most sunshine days are January and November (21.9 days).
The month with the least sunshine days is July (14.1 days).

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Average UV index in January
Rock Hall, MD

Average UV index in January - Rock Hall, MD
  • Average UV index in January: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in January
Rock Hall, MD

Average cloud cover in January - Rock Hall, MD
  • Average cloud cover in January: 43

The months with the most cloud cover are February, March and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in January
Rock Hall, MD

Average visibility in January - Rock Hall, MD
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Rock Hall, Maryland, USA

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