December weather forecast and climate
Rochester, United Kingdom

Weather in December

December, the first month of the winter, in Rochester, is still a chilly month, with average temperature varying between 8.1°C (46.6°F) and 4.1°C (39.4°F).

Temperature

In December, the average high-temperature is practically the same as in November - a chilly 8.1°C (46.6°F). In December, in Rochester, United Kingdom, the average low-temperature is 4.1°C (39.4°F).

Humidity

With an average relative humidity of 88%, December is the most humid month.

Rainfall

The month with the most rainfall is December when the rain falls for 15.5 days and typically aggregates up to 53mm (2.09") of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Rochester, United Kingdom, in December, snow falls for 1.8 days, with typically accumulated 17mm (0.67") of snow. In Rochester, during the entire year, snow falls for 9.7 days, and aggregates up to 69mm (2.72") of snow.

Daylight

With an average of 8h of daylight, December has the shortest days of the year in Rochester.

Sunshine

In December, the average sunshine is 4.4h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rochester, United Kingdom. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the most humid month in Rochester?

December is the most humid month in Rochester, with an average relative humidity of 88%.

What is the average humidity in December in Rochester?

The average relative humidity in December in Rochester, United Kingdom, is 88%.

What is the wettest month in Rochester?

The month with the most rainfall in Rochester is December when the rain falls for 15.5 days and typically aggregates up to 53mm (2.09") of precipitation.

How much does it rain in Rochester in December?

In December, in Rochester, United Kingdom, the rain falls for 15.5 days. Throughout December, 53mm (2.09") of precipitation is accumulated.

How much does it snow in Rochester in December?

In December, in Rochester, it is snowing for 1.8 days. Throughout December, 17mm (0.67") of snow is accumulated.

What is the month with the shortest days in Rochester?

With an average of 8h of daylight, December has the shortest days of the year.

How many hours of daylight does Rochester have in December?

In December, the average length of the day in Rochester, United Kingdom, is 8h.

How long on average sun shines in December in Rochester?

In Rochester, United Kingdom, the average sunshine in December is 4.4h.

What are the months with the lowest UV index in Rochester?

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

How high is the UV index in December in Rochester?

In December, the average daily maximum UV index in Rochester, United Kingdom, is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Rochester, United Kingdom

Average temperature in December - Rochester, United Kingdom
  • Average high temperature in December: 8.1°C

The warmest months (with the highest average high temperature) are July and August (21.3°C).
The month with the lowest average high temperature is January (6.8°C).

  • Average low temperature in December: 4.1°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).

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Average pressure in December
Rochester, United Kingdom

Average pressure in December - Rochester, United Kingdom
  • Average pressure in December: 1014.8mbar

The month with the highest atmospheric pressure is September (1017.1mbar).
The month with the lowest atmospheric pressure is November (1010.8mbar).

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Average wind speed in December
Rochester, United Kingdom

Average wind speed in December - Rochester, United Kingdom
  • Average wind speed in December: 19.6km/h

The windiest months (with the highest average wind speed) are February and December (19.6km/h).
The calmest month (with the lowest average wind speed) is July (14km/h).

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Average humidity in December
Rochester, United Kingdom

Average humidity in December - Rochester, United Kingdom
  • Average humidity in December: 88%

The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (75%).

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Average rainfall in December
Rochester, United Kingdom

Average rainfall in December - Rochester, United Kingdom
  • Average rainfall in December: 53mm

The wettest month (with the highest rainfall) is December (53mm).
The driest month (with the least rainfall) is April (24mm).

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Average rainfall days in December
Rochester, United Kingdom

Average rainfall days in December - Rochester, United Kingdom
  • Average rainfall days in December: 15.5 days

The month with the highest number of rainy days is November (17.5 days).
The month with the least rainy days is September (12 days).

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Average snowfall in December
Rochester, United Kingdom

Average snowfall in December - Rochester, United Kingdom
  • Average snowfall in December: 17mm

The month with the highest snowfall is February (26mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in December
Rochester, United Kingdom

Average snowfall days in December - Rochester, United Kingdom
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is February (3.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Rochester, United Kingdom

Average daylight in December / Average sunshine in December - Rochester, United Kingdom
  • Average daylight in December: 8h

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 8h).

  • Average sunshine in December: 4.4h

Months with the most sunshine are July and August (Average sunshine: 8.7h).
The month with the least sunshine is February (Average sunshine: 3.7h).

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Average sunshine days in December
Rochester, United Kingdom

Average sunshine days in December - Rochester, United Kingdom
  • Average sunshine days in December: 12 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is November (9.7 days).

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Average UV index in December
Rochester, United Kingdom

Average UV index in December - Rochester, United Kingdom
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Rochester, United Kingdom

Average cloud cover in December - Rochester, United Kingdom
  • Average cloud cover in December: 56

The month with the most cloud cover is February (Cloud cover 60).
Months with the least cloud cover are August and September (Cloud cover 43).

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Average visibility in December
Rochester, United Kingdom

Average visibility in December - Rochester, United Kingdom
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

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