January weather forecast
Rock Creek Park, MD

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Weather in January

January, the same as December, is another cold winter month in Rock Creek Park, Maryland, with an average temperature fluctuating between 28.4°F (-2°C) and 39.6°F (4.2°C).

Temperature

In Rock Creek Park, the month of January is known for its lowest average temperatures, reaching a high of 39.6°F (4.2°C) and a low of 28.4°F (-2°C).

Humidity

January, March, April and November, with an average relative humidity of 72%, are the least humid months.

Rainfall

In January, the rain falls for 9.9 days. Throughout January, 2.01" (51mm) of precipitation is accumulated. In Rock Creek Park, Maryland, during the entire year, the rain falls for 155.7 days and collects up to 31.22" (793mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Rock Creek Park. January is the month with the most snowfall. Snow falls for 4.4 days and accumulates 2.05" (52mm) of snow.

Daylight

The average length of the day in January is 9h and 47min.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:13 am and sunset at 5:25 pm EST.

Sunshine

In Rock Creek Park, the average sunshine in January is 5.3h.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index of 2 during January translates into these guidelines:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. To guard against the harmful effects of the Sun, minimize exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

January, having an average high-temperature of 39.6°F (4.2°C) and an average low-temperature of 28.4°F (-2°C), is the coldest month in Rock Creek Park.

Is January cold?

An average high-temperature, in January, in Rock Creek Park, is 39.6°F (4.2°C) and the average low-temperature is 28.4°F (-2°C).

What are the least humid months?

The months with the lowest humidity are January, March, April and November, with an average relative humidity of 72%.

What is the average humidity in January?

The average relative humidity in January is 72%.

How many days does it rain in January?

In Rock Creek Park, during January, the rain falls for 9.9 days and regularly aggregates up to 2.01" (51mm) of precipitation.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 4.4 days and typically aggregates up to 2.05" (52mm) of snow.

How many days does it snow in January?

In Rock Creek Park, Maryland, in January, during 4.4 snowfall days, 2.05" (52mm) of snow is typically accumulated.

What is the average length of the day in January?

In Rock Creek Park, the average day length in January is 9h and 47min.

When is the sunrise / sunset in January?

On the first day of January, sunrise is at 7:25 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:25 pm EST.

How many hours of sunshine does Rock Creek Park have in January?

The average sunshine duration in January is 5.3h.

What are the months with the lowest UV index?

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in January?

The average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
45.5°F 7.5°C
39.6°F 4.2°C
43.2°F 6.2°C
Average low temperature
34.7°F 1.5°C
28.4°F -2°C
30.7°F -0.7°C
Average pressure
30.11" 765mmHg
30.1" 765mmHg
30.07" 764mmHg
Average wind speed
8.6mph 13.8km/h
9.3mph 15km/h
9.3mph 15km/h
Average max. wind speed
9.3mph 15km/h
10.1mph 16.3km/h
10mph 16.1km/h
Average wind speed gusts
13.9mph 22.4km/h
14.9mph 24km/h
15.2mph 24.5km/h
Average humidity
75%
72%
74%
Average rainfall
2.83" 72mm
2.01" 51mm
2.36" 60mm
Average rainfall days
11.4
9.9
10.8
Average snowfall
0.63" 16mm
2.05" 52mm
1.73" 44mm
Average snowfall days
2.4
4.4
4.2
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
5h 1min
5h 2min
5h 1min
Average sunshine days
16.9
17.5
13.9
Average UV index
2
2
3
Average cloud cover
44%
43%
45%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Rock Creek Park, MD

Average temperature in January - Rock Creek Park, MD
  • Average high temperature in January: 39.6°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in January: 28.4°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in January
Rock Creek Park, MD

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

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in January
Rock Creek Park, MD

Average wind speed in January - Rock Creek Park, MD
  • Average wind speed in January: 9.3mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in January
Rock Creek Park, MD

Average humidity in January - Rock Creek Park, MD
  • Average humidity in January: 72%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

Average rainfall in January
Rock Creek Park, MD

Average rainfall in January - Rock Creek Park, MD
  • Average rainfall in January: 2.01"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in January
Rock Creek Park, MD

Average rainfall days in January - Rock Creek Park, MD
  • Average rainfall days in January: 9.9 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

Average snowfall in January
Rock Creek Park, MD

Average snowfall in January - Rock Creek Park, MD
  • Average snowfall in January: 2.05"

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in January
Rock Creek Park, MD

Average snowfall days in January - Rock Creek Park, MD
  • Average snowfall days in January: 4.4 days

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Rock Creek Park, MD

Average daylight in January / Average sunshine in January - Rock Creek Park, 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).

Average sunshine days in January
Rock Creek Park, MD

Average sunshine days in January - Rock Creek Park, MD
  • Average sunshine days in January: 17.5 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in January
Rock Creek Park, MD

Average UV index in January - Rock Creek Park, 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, November and December (UV index 2).

Average cloud cover in January
Rock Creek Park, MD

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

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in January
Rock Creek Park, MD

Average visibility in January - Rock Creek Park, 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).

Rock Creek Park, Maryland, USA

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