January weather forecast and climate
Lahti, Finland

Weather in January

January, like December, is another subzero cold winter month in Lahti, Finland, with average temperature ranging between min -8.9°C (16°F) and max -4.5°C (23.9°F).

Temperature

January is the coldest month, with an average high-temperature of -4.5°C (23.9°F) and an average low-temperature of -8.9°C (16°F).

Humidity

The average relative humidity in Lahti is 94%.

Rainfall

In Lahti, in January, it is raining for 4.1 days, with typically 31mm (1.22") of accumulated precipitation. In Lahti, Finland, during the entire year, the rain falls for 118.7 days and collects up to 398mm (15.67") of precipitation.

Snowfall

January through May, September through December are months with snowfall in Lahti. The month with the most snowfall is January when snow falls for 18.9 days and typically aggregates up to 196mm (7.72") of snow.

Daylight

In Lahti, the average length of the day in January is 6.6h.

Sunshine

In Lahti, the average sunshine in January is 1.5h.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Lahti?

The coldest month in Lahti is January, with an average high-temperature of -4.5°C (23.9°F) and an average low-temperature of -8.9°C (16°F).

What is the average humidity in January in Lahti?

In January, the average relative humidity is 94%.

How many days does it rain in January in Lahti?

In January, in Lahti, the rain falls for 4.1 days. Throughout January, 31mm (1.22") of precipitation is accumulated.

When does it snow the most in Lahti?

January is the month with the most snowfall. Snow falls for 18.9 days and accumulates 196mm (7.72") of snow.

How many days does it snow in January in Lahti?

In Lahti, in January, snow falls for 18.9 days, with typically accumulated 196mm (7.72") of snow.

What is the average length of the day in January in Lahti?

The average length of the day in January is 6.6h.

How many hours of sunshine does Lahti have in January?

The average sunshine in January is 1.5h.

What is the month with the lowest UV index in Lahti?

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

How high is the UV index in January in Lahti?

The average daily maximum UV index in January in Lahti, Finland, is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.

Average temperature in January
Lahti, Finland

Average temperature in January - Lahti, Finland
  • Average high temperature in January: -4.5°C

The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (-4.5°C).

  • Average low temperature in January: -8.9°C

The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is January (-8.9°C).

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Average pressure in January
Lahti, Finland

Average pressure in January - Lahti, Finland
  • Average pressure in January: 1011.7mbar

The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).

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Average wind speed in January
Lahti, Finland

Average wind speed in January - Lahti, Finland
  • Average wind speed in January: 11.3km/h

The windiest month (with the highest average wind speed) is December (12km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).

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Average humidity in January
Lahti, Finland

Average humidity in January - Lahti, Finland
  • Average humidity in January: 94%

The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (67%).

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Average rainfall in January
Lahti, Finland

Average rainfall in January - Lahti, Finland
  • Average rainfall in January: 31mm

The wettest month (with the highest rainfall) is July (46mm).
The driest month (with the least rainfall) is April (24mm).

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Average rainfall days in January
Lahti, Finland

Average rainfall days in January - Lahti, Finland
  • Average rainfall days in January: 4.1 days

The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is February (3.7 days).

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Average snowfall in January
Lahti, Finland

Average snowfall in January - Lahti, Finland
  • Average snowfall in January: 196mm

The month with the highest snowfall is January (196mm).
Months with the least snowfall are June, July and August (0mm).

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Average snowfall days in January
Lahti, Finland

Average snowfall days in January - Lahti, Finland
  • Average snowfall days in January: 18.9 days

Months with the highest number of snowfall days are January and December (18.9 days).
Months with the least snowfall days are June, July and August (0 days).

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

Average daylight in January / Average sunshine in January - Lahti, Finland
  • Average daylight in January: 6.6h

The month with the longest days is June (Average daylight: 19.1h).
The month with the shortest days is December (Average daylight: 5.7h).

  • Average sunshine in January: 1.5h

The month with the most sunshine is June (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 1.4h).

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Average sunshine days in January
Lahti, Finland

Average sunshine days in January - Lahti, Finland
  • Average sunshine days in January: 11.3 days

Months with the most sunshine days are May and August (17.6 days).
The month with the least sunshine days is December (8.4 days).

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Average UV index in January
Lahti, Finland

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

The month with the highest UV index is July (UV index 5).
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
Lahti, Finland

Average cloud cover in January - Lahti, Finland
  • Average cloud cover in January: 81

Months with the most cloud cover are January and February (Cloud cover 81).
The month with the least cloud cover is August (Cloud cover 44).

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Average visibility in January
Lahti, Finland

Average visibility in January - Lahti, Finland
  • Average visibility in January: 5km

Months with the highest visibility are May, June, July and August (9km).
Months with the lowest visibility are January and February (5km).

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