January weather forecast
Riverdale Gardens, MD

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Weather in January

January, like December, in Riverdale Gardens, Maryland, is a wintry winter month, with an average temperature fluctuating between 39.9°F (4.4°C) and 27.7°F (-2.4°C).

Temperature

The month of January, characterized by an average high of 39.9°F (4.4°C) and a low of 27.7°F (-2.4°C), is recognized as the coldest.

Humidity

In Riverdale Gardens, the average relative humidity in January is 72%.

Rainfall

January is the month with the least rainfall. Rain falls for 9.3 days and accumulates 2.01" (51mm) of precipitation.

Snowfall

January through April and December are months with snowfall. January is the month with the most snowfall. Snow falls for 4.1 days and accumulates 2.6" (66mm) of snow.

Daylight

In Riverdale Gardens, Maryland, the average length of the day in January is 9h and 48min.
On the first day of January, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:27 pm EST.

Sunshine

In Riverdale Gardens, the average sunshine in January is 5.1h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 2 in January translates into these instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

Riverdale Gardens's coldest month, January, generally records average temperatures ranging from a high of 39.9°F (4.4°C) to a low of 27.7°F (-2.4°C).

How cold is January?

Riverdale Gardens in January has an average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 27.7°F (-2.4°C).

What is the average humidity in January?

In Riverdale Gardens, the average relative humidity in January is 72%.

What is the driest month?

The month with the least rainfall is January, when the rain falls for 9.3 days and typically collects 2.01" (51mm) of precipitation.

How many days does it rain in January?

In January, the rain falls for 9.3 days. Throughout January, 2.01" (51mm) of precipitation is accumulated.

When does it snow the most?

January is the month with the most snowfall. Snow falls for 4.1 days and accumulates 2.6" (66mm) of snow.

How many days does it snow in January?

In January, it is snowing for 4.1 days. Throughout January, 2.6" (66mm) of snow is accumulated.

How many hours of daylight does Riverdale Gardens have in January?

In January, the average day length is 9h and 48min.

When are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:27 pm EST.

How many hours of sunshine does Riverdale Gardens have in January?

The average sunshine duration in January is 5.1h.

When is the lowest UV index?

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

What is the UV index reading in January?

In Riverdale Gardens, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Riverdale Gardens, MD

Average temperature in January - Riverdale Gardens, MD
  • Average high temperature in January: 39.9°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in January: 27.7°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

Average pressure in January
Riverdale Gardens, MD

Average pressure in January - Riverdale Gardens, MD
  • Average pressure in January: 30.11"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
Riverdale Gardens, MD

Average wind speed in January - Riverdale Gardens, MD
  • Average wind speed in January: 7.9mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in January
Riverdale Gardens, MD

Average humidity in January - Riverdale Gardens, MD
  • Average humidity in January: 72%

The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).

Average rainfall in January
Riverdale Gardens, MD

Average rainfall in January - Riverdale Gardens, MD
  • Average rainfall in January: 2.01"

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").

Average rainfall days in January
Riverdale Gardens, MD

Average rainfall days in January - Riverdale Gardens, MD
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).

Average snowfall in January
Riverdale Gardens, MD

Average snowfall in January - Riverdale Gardens, MD
  • Average snowfall in January: 2.6"

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").

Average snowfall days in January
Riverdale Gardens, MD

Average snowfall days in January - Riverdale Gardens, MD
  • Average snowfall days in January: 4.1 days

The month with the highest number of snowfall days is January (4.1 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
Riverdale Gardens, MD

Average daylight in January / Average sunshine in January - Riverdale Gardens, 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 1min

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 0min).

Average sunshine days in January
Riverdale Gardens, MD

Average sunshine days in January - Riverdale Gardens, MD
  • Average sunshine days in January: 18.6 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in January
Riverdale Gardens, MD

Average UV index in January - Riverdale Gardens, 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 and December (UV index 2).

Average cloud cover in January
Riverdale Gardens, MD

Average cloud cover in January - Riverdale Gardens, MD
  • Average cloud cover in January: 43

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in January
Riverdale Gardens, MD

Average visibility in January - Riverdale Gardens, 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).

Riverdale Gardens, Maryland, USA

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