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The climate of Tornio is
cold continental, with freezing winters and mild summers.
The city is located in central-northern Finland, in the northernmost part of the Gulf of Bothnia (known as Perämeri), which can freeze in winter. It is useful to recall that sea water freezes at about -2 °C (28.5 °F).
Beyond the border with Sweden is the twin city of
Haparanda.
It is true that we are at the 65th parallel, therefore just south of the Arctic Circle, but due to atmospheric refraction, the
midnight sun can be seen here as well, from 19 to 25 June. The
white nights, when the sun sets but it doesn't get completely dark even at midnight, occur before and after the period of the midnight sun, ie from April 23rd, and until August 20th.
In
winter, there can be cold spells of arctic origin. The coldest record is -41.7 °C (-43.1 °F) and was set in February 1966.
In
summer, there can be short hot periods. The highest record is 32.7 °C (90.9 °F) and was set in July 1970.
Best Time
The
best time to visit Tornio is the
summer, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.
Tornio - Climate data
In Tornio, the
average temperature of the coldest month (February) is of -9.6 °C (14.7 °F), that of the warmest month (July) is of 16.3 °C (61.4 °F). Here are the average temperatures.
Tornio - Average temperatures (1991-2020) | Month | Min (°C) | Max (°C) | Mean (°C) | Min (°F) | Max (°F) | Mean (°F) |
|---|
| January | -13 | -5 | -9.4 | 8 | 22 | 15.1 |
|---|
| February | -14 | -6 | -9.6 | 7 | 22 | 14.7 |
|---|
| March | -10 | -1 | -5.1 | 15 | 31 | 22.8 |
|---|
| April | -4 | 5 | 0.7 | 26 | 41 | 33.2 |
|---|
| May | 2 | 12 | 7 | 36 | 53 | 44.6 |
|---|
| June | 8 | 17 | 12.9 | 47 | 63 | 55.3 |
|---|
| July | 12 | 21 | 16.3 | 54 | 69 | 61.4 |
|---|
| August | 10 | 18 | 14.2 | 50 | 65 | 57.6 |
|---|
| September | 5 | 13 | 9 | 42 | 55 | 48.3 |
|---|
| October | 0 | 5 | 2.4 | 31 | 41 | 36.4 |
|---|
| November | -6 | 0 | -2.8 | 22 | 32 | 27 |
|---|
| December | -10 | -3 | -6.6 | 14 | 26 | 20.2 |
|---|
| Year | -1.4 | 6.4 | 2.5 | 29.5 | 43.6 | 36.5 |
|---|
In Tornio,
precipitation amounts to 645 millimeters (25.4 inches) per year: so, it is at an intermediate level. It ranges from 35 mm (1.4 in) in the driest month (April) to 70 mm (2.8 in) in the wettest one (November). Here is the average precipitation.
Tornio - Average precipitation| Month | Millimeters | Inches | Days |
|---|
| January | 55 | 2.2 | 11 |
|---|
| February | 45 | 1.8 | 9 |
|---|
| March | 40 | 1.6 | 8 |
|---|
| April | 35 | 1.4 | 7 |
|---|
| May | 45 | 1.8 | 8 |
|---|
| June | 55 | 2.2 | 8 |
|---|
| July | 60 | 2.4 | 9 |
|---|
| August | 65 | 2.6 | 8 |
|---|
| September | 65 | 2.6 | 9 |
|---|
| October | 60 | 2.4 | 10 |
|---|
| November | 70 | 2.8 | 12 |
|---|
| December | 60 | 2.4 | 12 |
|---|
| Year | 645 | 25.4 | 111 |
|---|
At Tornio, the
sea temperature ranges from -0.5 °C (31 °F) in February, March to 14.5 °C (58 °F) in August. Here are the average sea temperatures.
Tornio - Sea temperature| Month | Celsius (°C) | Fahrenheit (°F) |
|---|
January | 0.5 | 33 | February | -0.5 | 31 | March | -0.5 | 31 | April | 0 | 32 | May | 2.5 | 37 | June | 7.5 | 46 | July | 13 | 56 | August | 14.5 | 58 | September | 12 | 54 | October | 8 | 47 | November | 5 | 41 | December | 2.5 | 36 | Year | 5.5 | 41.8 |
Tornio - Weather by month
Based on the period 1991-2020
In
January, the weather in Tornio is usually freezing cold. The average temperature is of -9.4 °C (15 °F), with a minimum of -13.3 °C (8.1 °F) and a maximum of -5.5 °C (22.2 °F).
On the coldest nights of the month, the temperature usually drops to around -28 °C (-18 °F). However, it dropped to -40.2 °C (-40.4 °F) in January 1999.
On the warmest days of the month, the temperature usually reaches around 2.5 °C (37 °F). However, it reached 6.5 °C (43.7 °F) in January 2002.
Precipitation amounts to 55 mm (2.2 in), distributed over 11 days.
The day lasts on average 4 hours and 50 minutes. So the days are short.
The average sea temperature is of 0.5 °C (33 °F). Therefore, the sea is very cold for swimming.
In
February, the coldest month of the year, the weather in Tornio is usually freezing cold. The average temperature is of -9.6 °C (15 °F), with a minimum of -13.6 °C (7.4 °F) and a maximum of -5.6 °C (21.9 °F).
On the coldest nights of the month, the temperature usually drops to around -27 °C (-17 °F). However, it dropped to -34.3 °C (-29.7 °F) in February 2012.
On the warmest days of the month, the temperature usually reaches around 3.5 °C (38 °F). However, it reached 7.6 °C (45.7 °F) in February 1993.
Precipitation amounts to 45 mm (1.8 in), distributed over 9 days.
The day lasts on average 8 hours and 20 minutes.
The average sea temperature is of -0.5 °C (31.5 °F). Therefore, the sea is very cold for swimming.
In
March, the weather in Tornio is usually freezing cold. The average temperature is of -5.1 °C (23 °F), with a minimum of -9.5 °C (14.8 °F) and a maximum of -0.7 °C (30.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -22 °C (-8 °F). However, it dropped to -30 °C (-22 °F) in March 2006.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 7 °C (44 °F). However, it reached 10.5 °C (50.9 °F) in March 2016.
Precipitation amounts to 40 mm (1.6 in), distributed over 8 days.
The day lasts on average 11 hours and 50 minutes.
The average sea temperature is of -0.5 °C (31 °F). Therefore, the sea is very cold for swimming.
In
April, the weather in Tornio is usually cold. The average temperature is of 0.7 °C (33 °F), with a minimum of -3.5 °C (25.7 °F) and a maximum of 4.9 °C (40.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -12.5 °C (9 °F). However, it dropped to -17.5 °C (0.5 °F) in April 1998.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 12 °C (54 °F). However, it reached 17.2 °C (63 °F) in April 2002.
Precipitation amounts to 35 mm (1.4 in), distributed over 7 days.
The day lasts on average 15 hours and 30 minutes.
The average sea temperature is of 0 °C (32 °F). Therefore, the sea is very cold for swimming.
In
May, the weather in Tornio is usually quite mild. The average temperature is of 7.0 °C (45 °F), with a minimum of 2.3 °C (36.2 °F) and a maximum of 11.7 °C (53.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -7.9 °C (17.8 °F) in May 1999.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 21 °C (70 °F). However, it reached 28.8 °C (83.8 °F) in May 2013.
Precipitation amounts to 45 mm (1.8 in), distributed over 8 days.
The day lasts on average 19 hours and 25 minutes. So the days are very long.
The average sea temperature is of 2.5 °C (37 °F). Therefore, the sea is very cold for swimming.
In
June, the weather in Tornio is usually mild. The average temperature is of 12.9 °C (55 °F), with a minimum of 8.4 °C (47.2 °F) and a maximum of 17.4 °C (63.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 2.5 °C (37 °F). However, it dropped to 0.4 °C (32.7 °F) in June 2004.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 25 °C (77 °F). However, it reached 31.9 °C (89.4 °F) in June 2011.
Precipitation amounts to 55 mm (2.2 in), distributed over 8 days.
The day lasts on average 23 hours and 25 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average sea temperature is of 7.5 °C (45.5 °F). Therefore, the sea is very cold for swimming.
In
July, the warmest month of the year, the weather in Tornio is usually very mild. The average temperature is of 16.3 °C (61 °F), with a minimum of 12 °C (53.5 °F) and a maximum of 20.7 °C (69.3 °F).
On the coldest nights of the month, the temperature usually drops to around 6 °C (43 °F). However, it dropped to 3.3 °C (37.9 °F) in July 1999.
On the warmest days of the month, the temperature usually reaches around 26.5 °C (79.5 °F). However, it reached 31 °C (87.8 °F) in July 2019.
Precipitation amounts to 60 mm (2.4 in), distributed over 9 days.
The day lasts on average 20 hours and 50 minutes. So the days are very long.
The average sea temperature is of 13 °C (55.5 °F). Therefore, the sea is very cold for swimming.
In
August, the weather in Tornio is usually mild. The average temperature is of 14.2 °C (58 °F), with a minimum of 10.1 °C (50.3 °F) and a maximum of 18.3 °C (65 °F).
On the coldest nights of the month, the temperature usually drops to around 3 °C (37 °F). However, it dropped to -0.3 °C (31.5 °F) in August 2010.
On the warmest days of the month, the temperature usually reaches around 24 °C (75.5 °F). However, it reached 28 °C (82.4 °F) in August 2002.
Precipitation amounts to 65 mm (2.6 in), distributed over 8 days.
The day lasts on average 16 hours and 40 minutes. So the days are long.
The average sea temperature is of 14.5 °C (58.5 °F). Therefore, the sea is very cold for swimming.
In
September, the weather in Tornio is usually mild. The average temperature is of 9.0 °C (48 °F), with a minimum of 5.4 °C (41.6 °F) and a maximum of 12.7 °C (54.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -2 °C (28 °F). However, it dropped to -5.3 °C (22.5 °F) in September 2018.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 18.5 °C (65 °F). However, it reached 23.6 °C (74.5 °F) in September 1995.
Precipitation amounts to 65 mm (2.6 in), distributed over 9 days.
The day lasts on average 13 hours and 5 minutes.
The average sea temperature is of 12 °C (53.5 °F). Therefore, the sea is very cold for swimming.
In
October, the weather in Tornio is usually cold. The average temperature is of 2.4 °C (36 °F), with a minimum of -0.4 °C (31.3 °F) and a maximum of 5.3 °C (41.5 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -10.5 °C (13.5 °F). However, it dropped to -20 °C (-4 °F) in October 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 11.5 °C (52.5 °F). However, it reached 16.3 °C (61.3 °F) in October 2005.
Precipitation amounts to 60 mm (2.4 in), distributed over 10 days.
The day lasts on average 9 hours and 30 minutes.
The average sea temperature is of 8 °C (47 °F). Therefore, the sea is very cold for swimming.
In
November, the weather in Tornio is usually very cold. The average temperature is of -2.8 °C (27 °F), with a minimum of -5.5 °C (22.1 °F) and a maximum of 0 °C (32 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -16.5 °C (2.5 °F). However, it dropped to -26.6 °C (-15.9 °F) in November 2002.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 6 °C (42.5 °F). However, it reached 10 °C (50 °F) in November 2003.
Precipitation amounts to 70 mm (2.8 in), distributed over 12 days.
The day lasts on average 5 hours and 50 minutes. So the days are short.
The average sea temperature is of 5 °C (41 °F). Therefore, the sea is very cold for swimming.
In
December, the weather in Tornio is usually freezing cold. The average temperature is of -6.6 °C (20 °F), with a minimum of -10 °C (14.1 °F) and a maximum of -3.2 °C (26.3 °F).
On the coldest nights of the month, the temperature usually drops to around -23 °C (-9 °F). However, it dropped to -32.1 °C (-25.8 °F) in December 1995.
On the warmest days of the month, the temperature usually reaches around 3.5 °C (38.5 °F). However, it reached 6.6 °C (43.9 °F) in December 2013.
Precipitation amounts to 60 mm (2.4 in), distributed over 12 days.
The day lasts on average 3 hours and 10 minutes. So the days are very short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average sea temperature is of 2.5 °C (36.5 °F). Therefore, the sea is very cold for swimming.