Kalmar, where it's located

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.
The average temperature of the coldest month (January) is of -0.8 °C (31 °F), that of the warmest month (July) is of 17.6 °C (64 °F). However, during polar cold spells, the temperature can drop to -20 °C (-4 °F) or below, while in summer, it can reach 28/30 °C (82/86 °F), although rarely. Here are the average temperatures.
Kalmar - Average temperatures
Min (°C)-4-4-21591212842-2
Max (°C)2261116202322181274
Min (°F)252528344148545446393628
Max (°F)363643526168737264544539

Precipitation amounts to 485 millimeters (19.1 inches) per year: it is therefore quite scarce. It ranges from 30 mm (1.2 in) in the driest months (February, March, April) to 60 mm (2.4 in) in the wettest (July). Here is the average precipitation.
Kalmar - Average precipitation

The sea temperature ranges between 3 °C (37 °F) and 18 °C (64 °F). So, it never becomes warm for swimming. Here are the average sea temperatures.
Kalmar - Sea temperature
Temp (°C)43348131718151286
Temp (°F)393737394655636459544643


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.