Washington
District of Columbia, USA
Long term weather forecast
Long term weather forecast

January weather forecast and Climate
Washington, DC

The winter brings the coldest temperatures of the year in January with the mercury in the range of 28°F (-2.2°C) to 44°F (6.7°C), accompanied by a moderate amount of snow.
Wear a warm winter coat, gloves, and thermals before stepping outside in the freezing weather, as the days are also chilly.
Travelers who lack snow experience should avoid driving motor vehicles, especially on untreated roads and thin ice. A White Christmas and snowy New Year is a remarkable combination for visitors who rarely get a chance to experience snow.
  • Average high temperature in January: 6.3°C

Warmest month (with highest average high temperature) is July (31.3°C).
Month with lowest average high temperature is January (6.3°C).

  • Average low temperature in January: -1.9°C

Month with highest average low temperature is July (21.7°C).
Coldest month (with lowest average low temperature) is January (-1.9°C).

  • Average humidity in January: 62.1%

Month with highest relative humidity is September (69.7%).
Month with lowest relative humidity is April (58%).

  • Average rainfall in January: 71.4mm

Wettest month (with highest rainfall) is May (101.3mm).
Driest month (with lowest rainfall) is February (66.5mm).

  • Average rainfall days in January: 9.6 days

Month with highest number of rainy days is May (11.1 days).
Month with lowest number of rainy days is October (7.7 days).

  • Average snowfall in January: 142.2mm

Month with highest snowfall is February (144.8mm).
Months with lowest snowfall are April, May, June, July, August, September and October (0mm).

  • Average snowfall days in January: 3 days

Month with highest number of snowfall days is January (3 days).
Months with lowest number of snowfall days are May, June, July, August, September and October (0 days).

  • Average daylight in January: 10h

Months with longest days are June and July (Average daylight: 15h).
Month with shortest days is December (Average daylight: 9h).

  • Average sunshine in January: 4.7h

Month with most sunshine is June (Average sunshine: 9.4h).
Month with least sunshine is December (Average sunshine: 4.3h).

  • Average UV index in January: 2

Months with highest UV index are June and July (UV index 9).
Months with lowest UV index are January and December (UV index 2).

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