Riga
Latvia
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Riga, Latvia

A sunny day in Riga, Latvia, with a view of the river and a clear skyscape
A sunny day in Riga, Latvia, with a view of the river and a clear skyscape
December, the first month of the winter, in Riga, is still a cold month, with temperature in the range of an average low of -4.4°C (24.1°F) and an average high of 0.3°C (32.5°F).

Temperature

In Riga, the average high-temperature in December slightly decreases, from a wintry 3.9°C (39°F) in November, to a still cold 0.3°C (32.5°F). In Riga, in December, the average low-temperature is -4.4°C (24.1°F).

Humidity

In December, the average relative humidity in Riga is 89.4%.

Rainfall

In Riga, during 20.6 rainfall days, 46mm (1.8") of precipitation is typically accumulated. In Riga, during the entire year, the rain falls for 185.7 days and collects up to 621.9mm (24.5") of precipitation.

Sea temperature

In Riga, Latvia, the average water temperature is 4°C (39.2°F). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

With an average of 6.9h of daylight, December has the shortest days of the year in Riga.

Sunshine

December has the least sunshine of the year in Riga, with an average of 0.7h of sunshine.

UV index

January, November and December, with an average maximum UV index of 0, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
The daily maximum UV index of 0 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Riga?

In December, in Riga, Latvia, the average high-temperature is 0.3°C (32.5°F), and the average low-temperature is -4.4°C (24.1°F).

What is the average humidity in December in Riga?

In December, the average relative humidity in Riga, Latvia, is 89.4%.

How much does it rain in Riga in December?

In December, in Riga, the rain falls for 20.6 days. Throughout December, 46mm (1.8") of precipitation is accumulated.

What is the water temperature in December in Riga?

In Riga, the average seawater temperature in December is 4°C (39.2°F). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the month with the shortest days in Riga?

The month with the shortest days in Riga, Latvia, is December, with an average of 6.9h of daylight.

How many hours of daylight does Riga have in December?

The average length of the day in December in Riga, Latvia, is 6.9h.

What is the month with the least sunshine in Riga?

With an average of 0.7h of sunshine, December has the least sunshine of the year in Riga, Latvia.

How long on average sun shines in December in Riga?

The average sunshine in December in Riga is 0.7h.

When is the lowest UV index in Riga?

Months with the lowest UV index in Riga are January, November and December, with an average maximum UV index of 0.

How high is the UV index in December in Riga?

The average daily maximum UV index in December in Riga is 0. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the UV radiation.
Average temperature in December - Riga, Latvia
  • Average high temperature in December: 0.3°C

The warmest month (with the highest average high temperature) is July (21.7°C).
The month with the lowest average high temperature is January (-2.3°C).

  • Average low temperature in December: -4.4°C

The month with the highest average low temperature is July (12.3°C).
The coldest month (with the lowest average low temperature) is January (-7.8°C).

Average humidity in December - Riga, Latvia
  • Average humidity in December: 89.4%

The month with the highest relative humidity is November (90.2%).
The month with the lowest relative humidity is May (67.7%).

Average rainfall in December - Riga, Latvia
  • Average rainfall in December: 46mm

The wettest month (with the highest rainfall) is September (78.9mm).
The driest month (with the lowest rainfall) is February (27mm).

Average rainfall days in December - Riga, Latvia
  • Average rainfall days in December: 20.6 days

The month with the highest number of rainy days is January (21.5 days).
The month with the lowest number of rainy days is April (11 days).

Average sea temperature in December - Riga, Latvia
  • Average sea temperature in December: 4°C

The best month for swimming (with the highest average sea temperature) is August (17°C).
Coldest months (with the lowest average sea temperature) are February and March (1°C).

Average daylight in December / Average sunshine in December - Riga, Latvia
  • Average daylight in December: 6.9h

The month with the longest days is June (Average daylight: 17.8h).
The month with shortest days is December (Average daylight: 6.9h).

  • Average sunshine in December: 0.7h

The month with most sunshine is June (Average sunshine: 9.6h).
The month with least sunshine is December (Average sunshine: 0.7h).

Average UV index in December - Riga, Latvia
  • Average UV index in December: 0

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, November and December (UV index 0).