January weather forecast
Nagu, Finland

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Weather in January

January, the same as December, in Nagu, Finland, is a freezing cold winter month, with temperature in the range of an average low of -5.3°C (22.5°F) and an average high of -1.9°C (28.6°F).

Temperature

January stands out as Nagu's coldest month, with an average high-temperature of -1.9°C (28.6°F) and a low-temperature of -5.3°C (22.5°F).

Humidity

In Nagu, the average relative humidity in January is 89%.

Rainfall

In Nagu, in January, it is raining for 5.8 days, with typically 28mm (1.1") of accumulated precipitation. In Nagu, during the entire year, the rain falls for 133.7 days and collects up to 390mm (15.35") of precipitation.

Snowfall

January through May, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 13.7 days and accumulates 103mm (4.06") of snow.

Sea temperature

In Nagu, the average seawater temperature in January is 0.8°C (33.4°F).
Note: In swimming undertakings, this is deemed life-threatening and highly risky. The cold water induces intense discomfort and leads to swift hyperventilation. A specialized swimsuit is indispensable to decrease thermal injuries.

Daylight

The average length of the day in January is 6h and 49min.
On the first day of January, sunrise is at 09:36 and sunset at 15:35. On the last day of the month, sunrise is at 08:50 and sunset at 16:41 EET.

Sunshine

In January, the average sunshine in Nagu, Finland, is 2.2h.

UV index

January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Nagu. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 1 during January leads to these instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

What is the coldest month in Nagu?

January is the coldest month in Nagu, Finland, with the temperature often reaching an average high of -1.9°C (28.6°F) and an average low of -5.3°C (22.5°F).

How cold is January in Nagu?

In Nagu, in January, the average high-temperature is -1.9°C (28.6°F), and the average low-temperature is -5.3°C (22.5°F).

What is the average humidity in January in Nagu?

In Nagu, the average relative humidity in January is 89%.

How much does it rain in Nagu in January?

In Nagu, during January, the rain falls for 5.8 days and regularly aggregates up to 28mm (1.1") of precipitation.

When does it snow the most in Nagu?

January is the month with the most snowfall in Nagu, Finland. Snow falls for 13.7 days and accumulates 103mm (4.06") of snow.

How much does it snow in Nagu in January?

In Nagu, Finland, in January, during 13.7 snowfall days, 103mm (4.06") of snow is typically accumulated.

What is the sea temperature in January in Nagu?

In Nagu, the average seawater temperature in January is 0.8°C (33.4°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.

How many hours of daylight does Nagu have in January?

In January, the average day length in Nagu is 6h and 49min.

When is the sunrise / sunset in January in Nagu?

On the first day of January, sunrise is at 09:36 and sunset at 15:35. On the last day of the month, sunrise is at 08:50 and sunset at 16:41 EET.

How many hours of sunshine does Nagu have in January?

In January, the average sunshine duration in Nagu is 2.2h.

When is the lowest UV index in Nagu?

The months with the lowest UV index in Nagu are January through March, November and December, with an average maximum UV index of 1.

How high is the UV index in January in Nagu?

In January, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in January
Nagu, Finland

Average temperature in January - Nagu, Finland
  • Average high temperature in January: -1.9°C

The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-1.9°C).

  • Average low temperature in January: -5.3°C

The months with the highest average low temperature are July and August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-5.6°C).

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Average pressure in January
Nagu, Finland

Average pressure in January - Nagu, Finland
  • Average pressure in January: 1011.1mbar

The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).

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Average wind speed in January
Nagu, Finland

Average wind speed in January - Nagu, Finland
  • Average wind speed in January: 18.6km/h

The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).

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Average humidity in January
Nagu, Finland

Average humidity in January - Nagu, Finland
  • Average humidity in January: 89%

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).

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Average rainfall in January
Nagu, Finland

Average rainfall in January - Nagu, Finland
  • Average rainfall in January: 28mm

The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).

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Average rainfall days in January
Nagu, Finland

Average rainfall days in January - Nagu, Finland
  • Average rainfall days in January: 5.8 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.2 days).

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Average snowfall in January
Nagu, Finland

Average snowfall in January - Nagu, Finland
  • Average snowfall in January: 103mm

The month with the highest snowfall is January (103mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in January
Nagu, Finland

Average snowfall days in January - Nagu, Finland
  • Average snowfall days in January: 13.7 days

The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in January
Nagu, Finland

Average sea temperature in January - Nagu, Finland
  • Average sea temperature in January: 0.8°C

The best month for swimming (with the highest average sea temperature) is August (12.4°C).
The coldest months (with the lowest average sea temperature) are February and March (-0.2°C).

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Average daylight in January /
Average sunshine in January
Nagu, Finland

Average daylight in January / Average sunshine in January - Nagu, Finland
  • Average daylight in January: 6h and 5min

The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).

  • Average sunshine in January: 2h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).

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Average sunshine days in January
Nagu, Finland

Average sunshine days in January - Nagu, Finland
  • Average sunshine days in January: 13.2 days

The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (9.6 days).

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Average UV index in January
Nagu, Finland

Average UV index in January - Nagu, Finland
  • Average UV index in January: 1

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in January
Nagu, Finland

Average cloud cover in January - Nagu, Finland
  • Average cloud cover in January: 70

The month with the most cloud cover is December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).

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Average visibility in January
Nagu, Finland

Average visibility in January - Nagu, Finland
  • Average visibility in January: 9km

The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are February and March (8km).

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Nagu, Finland

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