Lahti (Finland) is a place with a mild continental climate. Temperatures during the day are in the range from -3.8 °C (25.2 °F) in February to 21.8 °C (71.2 °F) in July. The highest night temperatures could be experienced in July with 12.4 °C (54.3 °F), the lowest in February with -10.5 °C (13.1 °F). The driest month is April with just 8 days of rain, on the contrary, the month when it rains the most is December with 13 days of rain.

January weather

The sea temperature descents similarly to the previous month in Lahti, and the descent of the day temperature can be observed too, its value is -3.6 °C (25.5 °F). The night temperature descents similarly to the previous month, with its value being -9.3 °C (15.3 °F). The maximum of the wind speed can be noticed, with its value being 2.8. The beginning of the descent of the number of rainy days could be noticed, its value is 12 days.

February weather

The descent of the sea temperature can be observed, with its value of 0.4 °C (32.7 °F) in Lahti, while the minimum of the day temperature is observable, the value of this measure is -3.8 °C (25.2 °F). The rainfall amount starts to descent, its value is 34 mm (1.33 in), while the descent of the number of rainy days can be observed, its value is 10 days. The night temperature is on its minimum, its value is -10.5 °C (13.1 °F). The number of sun hours (without clouds) starts to rise, with its value being 2 hours.

March weather

The beginning of the rise of the day temperature could be noticed, its value is 0.8 °C (33.4 °F) in Lahti, while the minimum of the sea temperature is observable, with its value being 0.3 °C (32.5 °F). The number of rainy days descents similarly to the previous month, with its value being 9 days. The night temperature rise's start could be observed, with its value being -6.3 °C (20.7 °F). The rise of the number of sun hours (without clouds) can be observed, its value is 3 hours.

April weather

The day temperature rises similarly to the previous month, with its value being 7.7 °C (45.9 °F) in Lahti, while the beginning of the rise of the sea temperature could be noticed, with its value being 1.8 °C (35.2 °F). The number of rainy days reaches its minimum, and the rainfall amount reaches its minimum too in this month. The rise of the number of sun hours (without clouds) can be observed, its value is 5 hours. The night temperature continues to rise, with its value of -1.0 °C (30.2 °F).

May weather

The tourist season is at its beginning in Lahti. The day temperature rises similarly to the previous month, its value is 15.4 °C (59.7 °F), and the sea temperature rises similarly to the previous month too, with its value of 5.8 °C (42.4 °F). The rainfall amount starts to rise, with its value of 39 mm (1.54 in). The rise of the night temperature can be observed, with its value of 4.7 °C (40.5 °F). The minimum of the humidity can be noticed, the value of this measure is 67 %.

June weather

The day temperature rises similarly to the previous month, with its value being 19.2 °C (66.6 °F) in Lahti, and the sea temperature rises similarly to the previous month too, its value is 10.9 °C (51.6 °F). The ongoing tourist season is noticeable. The number of rainy days starts to rise in this month. The night temperature continues to rise, its value is 9.4 °C (48.9 °F). The maximum of the number of sun hours (without clouds) can be noticed, with its value being 9 hours.

July weather

The tourist season is taking place in Lahti. The maximum of the day temperature can be noticed, with its value being 21.8 °C (71.2 °F), while the rise of the sea temperature can be observed, its value is 15.8 °C (60.4 °F). The rainfall amount rises similarly to the previous month, with its value of 73 mm (2.86 in). The beginning of the descent of the number of sun hours (without clouds) could be noticed in this month. The night temperature is on its maximum, with its value being 12.4 °C (54.3 °F).

August weather

There is pending tourist season in August in Lahti. The day temperature descent's start could be observed, the value of this measure is 19.4 °C (66.9 °F), while the sea temperature is on its maximum, with its value being 16.8 °C (62.3 °F). The number of rainy days rise's start could be observed, its value is 11 days, while the rainfall amount is on its maximum in this month. The beginning of the descent of the night temperature could be noticed in August.

September weather

The sea temperature descent's start could be observed in Lahti, while the day temperature descents similarly to the previous month, with its value being 13.3 °C (55.9 °F). The beginning of the descent of the number of rainy days could be noticed, with its value being 11 days, and the rainfall amount descent's start could be observed as well, its value is 57 mm (2.23 in). The number of sun hours (without clouds) descents similarly to the previous month, with its value of 4 hours. The night temperature descents similarly to the previous month, with its value being 6.2 °C (43.2 °F).

October weather

The day temperature descents similarly to the previous month, with its value being 7.2 °C (45.0 °F) in Lahti, and the descent of the sea temperature can be observed too, with its value being 9.8 °C (49.7 °F). The rainfall amount starts to rise, its value is 67 mm (2.62 in), and the number of rainy days starts to rise as well, with its value being 11 days. The night temperature descents similarly to the previous month, with its value of 2.1 °C (35.8 °F). The descent of the number of sun hours (without clouds) can be observed, the value of this measure is 2 hours.

November weather

The sea temperature continues to descent, with its value being 6.3 °C (43.4 °F) in Lahti, and the day temperature descents similarly to the previous month as well, with its value of 1.5 °C (34.7 °F). The rise of the number of rainy days can be observed, the value of this measure is 13 days, while the rainfall amount descent's start could be observed, its value is 58 mm (2.30 in). The night temperature continues to descent, with its value being -2.7 °C (27.1 °F). The maximum of the humidity can be noticed, with its value of 90 %.

December weather

The sea temperature continues to descent, with its value being 3.4 °C (38.2 °F) in Lahti, and the day temperature continues to descent too, with its value of -2.1 °C (28.2 °F). The maximum of the number of rainy days is observable, with its value of 13 days. The night temperature descents similarly to the previous month. The day length reaches its minimum, with its value of 5 hours. The number of sun hours (without clouds) reaches its minimum, the value of this measure is 0 hours.

FAQs

What is the air temperature in Lahti in April at night?

The average night temperature in Lahti in April is -1.0 °C (30.2 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.

Are there good conditions to visit in May in Lahti?

May is a good month to visit Lahti. There are only 8 days of rain in the whole month, so you can leave your umbrella at home. A relatively low temperature of 15.4 °C (59.7 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The night temperature of 4.7 °C (40.5 °F) is not inviting for evening and night activities except for visiting a bar and having beer or two.

What temperature can I expect during the day in June in Lahti?

The average daily temperature in June in Lahti is 19.2 °C (66.6 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.

What is the sea temperature in July in Lahti?

The sea will reach 15.8 °C (60.4 °F) in July in Lahti. This is a sea temperature for resilient people only, most people won't enjoy swimming in such cold water or will have to use a wetsuit for water activities.

Is August part of the wet season in Lahti?

No, there is no wet season in August in Lahti - you can expect 11 days of rain during the month.

Is there a dry season in September in Lahti?

No, September is not a dry month in Lahti, expect rain approximately 11 days in a month.