Climate - Kalmar (Sweden)

The climate of Kalmar is Baltic, that is to say, relatively continental, with cold winters and mild summers.
The city is located on the southeastern coast of Sweden, a short distance from the island of Öland, which can be reached via a bridge.
Given the latitude (56°40'N), the white nights, in which the sun sets but it does not get completely dark even at midnight, occur from May 28 to July 15.
In winter, during polar cold spells, the temperature can drop to -20 °C (-4 °F) or below. The coldest record is -26.9 °C (-16.4 °F) and was set in January 1942.
In summer, the temperature can reach 28/30 °C (82/86 °F). The highest record is 35.2 °C (95.4 °F) and was set in July 1994.

Best Time

The best time to visit Kalmar 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.

Kalmar - Climate data

In Kalmar, the average temperature of the coldest month (January) is of -0.3 °C (31.4 °F), that of the warmest month (July) is of 17.4 °C (63.2 °F). Here are the average temperatures.
In Kalmar, precipitation amounts to 525 millimeters (20.7 inches) per year: so, it is at an intermediate level. It ranges from 25 mm (1 in) in the driest months (March, April) to 65 mm (2.6 in) in the wettest one (July). Here is the average precipitation.
At Kalmar, the sea temperature ranges from 3 °C (37 °F) in February, March to 18 °C (64 °F) in August. Here are the average sea temperatures.

Kalmar - Weather by month

Based on the period 1991-2020

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In January, the coldest month of the year, the weather in Kalmar is usually very cold. The average temperature is of -0.3 °C (31 °F), with a minimum of -2.9 °C (26.7 °F) and a maximum of 2.3 °C (36.2 °F).
On the coldest nights of the month, the temperature usually drops to around -14 °C (6.5 °F). However, it dropped to -23 °C (-9.4 °F) in January 1997.
On the warmest days of the month, the temperature usually reaches around 8.5 °C (47.5 °F). However, it reached 13 °C (55.4 °F) in January 1994.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 7 hours and 35 minutes. So the days are short.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 4 °C (39 °F). Therefore, the sea is very cold for swimming.

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In February, the weather in Kalmar is usually very cold. The average temperature is of -0.1 °C (32 °F), with a minimum of -3 °C (26.5 °F) and a maximum of 2.8 °C (37.1 °F).
On the coldest nights of the month, the temperature usually drops to around -14 °C (7 °F). However, it dropped to -25 °C (-13 °F) in February 2010.
On the warmest days of the month, the temperature usually reaches around 9 °C (48 °F). However, it reached 15 °C (59 °F) in February 2019.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 9 hours and 35 minutes.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 3 °C (37 °F). Therefore, the sea is very cold for swimming.

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In March, the weather in Kalmar is usually cold. The average temperature is of 2.1 °C (36 °F), with a minimum of -1.7 °C (28.9 °F) and a maximum of 6 °C (42.7 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -9.5 °C (15 °F). However, it dropped to -22 °C (-7.6 °F) in March 2005.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 14 °C (57.5 °F). However, it reached 20 °C (68 °F) in March 2017.
Precipitation amounts to 25 mm (1 in), distributed over 6 days.
The day lasts on average 11 hours and 55 minutes.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 3 °C (37 °F). Therefore, the sea is very cold for swimming.

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In April, the weather in Kalmar is usually quite cold. The average temperature is of 5.9 °C (43 °F), with a minimum of 1.1 °C (34.1 °F) and a maximum of 10.7 °C (51.3 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -5 °C (23.5 °F). However, it dropped to -8 °C (17.6 °F) in April 2012.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 19 °C (66 °F). However, it reached 25.7 °C (78.3 °F) in April 1993.
Precipitation amounts to 25 mm (1 in), distributed over 6 days.
The day lasts on average 14 hours and 25 minutes.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 4 °C (39.5 °F). Therefore, the sea is very cold for swimming.

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In May, the weather in Kalmar is usually mild. The average temperature is of 10.4 °C (51 °F), with a minimum of 5.2 °C (41.3 °F) and a maximum of 15.6 °C (60.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -1.5 °C (29.5 °F). However, it dropped to -4 °C (24.8 °F) in May 2014.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 23.5 °C (74 °F). However, it reached 29 °C (84.2 °F) in May 2017.
Precipitation amounts to 40 mm (1.6 in), distributed over 7 days.
The day lasts on average 16 hours and 30 minutes. So the days are long.
The average humidity is 70%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 7.5 °C (45.5 °F). Therefore, the sea is very cold for swimming.

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In June, the weather in Kalmar is usually very mild. The average temperature is of 14.7 °C (59 °F), with a minimum of 9.6 °C (49.2 °F) and a maximum of 19.9 °C (67.8 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 4 °C (39.5 °F). However, it dropped to 1 °C (33.8 °F) in June 2016.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 26.5 °C (80 °F). However, it reached 32 °C (89.6 °F) in June 2000.
Precipitation amounts to 45 mm (1.8 in), distributed over 8 days.
The day lasts on average 17 hours and 40 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 humidity is 69%.
The average wind speed is 14 kph (8 mph).
The average sea temperature is of 12.5 °C (54.5 °F). Therefore, the sea is very cold for swimming.

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In July, the warmest month of the year, the weather in Kalmar is usually very mild. The average temperature is of 17.4 °C (63 °F), with a minimum of 12.3 °C (54.1 °F) and a maximum of 22.4 °C (72.3 °F).
On the coldest nights of the month, the temperature usually drops to around 7 °C (44.5 °F). However, it dropped to 4 °C (39.2 °F) in July 1995.
On the warmest days of the month, the temperature usually reaches around 28 °C (82.5 °F). However, it reached 35.2 °C (95.4 °F) in July 1994.
Precipitation amounts to 65 mm (2.6 in), distributed over 9 days.
The day lasts on average 17 hours and 0 minutes. So the days are very long.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 16.5 °C (62 °F). Therefore, the sea is cold for swimming.

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In August, the weather in Kalmar is usually very mild. The average temperature is of 16.7 °C (62 °F), with a minimum of 11.6 °C (52.8 °F) and a maximum of 21.8 °C (71.3 °F).
On the coldest nights of the month, the temperature usually drops to around 5.5 °C (42 °F). However, it dropped to 1 °C (33.8 °F) in August 2012.
On the warmest days of the month, the temperature usually reaches around 27 °C (81 °F). However, it reached 32 °C (89.6 °F) in August 1992.
Precipitation amounts to 60 mm (2.4 in), distributed over 9 days.
The day lasts on average 15 hours and 0 minutes. So the days are long.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 18 °C (64 °F). Therefore, the sea is cold for swimming.

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In September, the weather in Kalmar is usually mild. The average temperature is of 12.8 °C (55 °F), with a minimum of 8.2 °C (46.8 °F) and a maximum of 17.3 °C (63.1 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, it dropped to -2 °C (28.4 °F) in September 2018.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 22 °C (72 °F). However, it reached 26.4 °C (79.5 °F) in September 1991.
Precipitation amounts to 45 mm (1.8 in), distributed over 8 days.
The day lasts on average 12 hours and 40 minutes.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 15 °C (59.5 °F). Therefore, the sea is cold for swimming.

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In October, the weather in Kalmar is usually quite mild. The average temperature is of 8.2 °C (47 °F), with a minimum of 4.7 °C (40.4 °F) and a maximum of 11.7 °C (53 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -3.5 °C (26 °F). However, it dropped to -9 °C (15.8 °F) in October 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 17.5 °C (63 °F). However, it reached 24 °C (75.2 °F) in October 1995.
Precipitation amounts to 50 mm (2 in), distributed over 9 days.
The day lasts on average 10 hours and 20 minutes.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 11.5 °C (52.5 °F). Therefore, the sea is very cold for swimming.

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In November, the weather in Kalmar is usually quite cold. The average temperature is of 4.0 °C (39 °F), with a minimum of 1.4 °C (34.6 °F) and a maximum of 6.6 °C (43.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -6.5 °C (20 °F). However, it dropped to -13 °C (8.6 °F) in November 1999.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 12 °C (53.5 °F). However, it reached 17 °C (62.6 °F) in November 2020.
Precipitation amounts to 55 mm (2.2 in), distributed over 10 days.
The day lasts on average 8 hours and 5 minutes.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 8 °C (46.5 °F). Therefore, the sea is very cold for swimming.

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In December, the weather in Kalmar is usually cold. The average temperature is of 0.9 °C (34 °F), with a minimum of -1.5 °C (29.3 °F) and a maximum of 3.4 °C (38.1 °F).
On the coldest nights of the month, the temperature usually drops to around -11.5 °C (11 °F). However, it dropped to -26 °C (-14.8 °F) in December 1995.
On the warmest days of the month, the temperature usually reaches around 9 °C (48 °F). However, it reached 13 °C (55.4 °F) in December 2006.
Precipitation amounts to 45 mm (1.8 in), distributed over 9 days.
The day lasts on average 6 hours and 55 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 89%. Hence, the air is normally humid.
The average wind speed is 14 kph (8 mph).
The average sea temperature is of 5.5 °C (42 °F). Therefore, the sea is very cold for swimming.