Ostersund, where it's located

The climate of Östersund is cold continental, with very cold winters, during which the temperature is often below freezing, and mild summers.
The city is situated in the central part of Sweden, 350 meters (1,150 ft) above sea level, near lake Storsjön.
The average temperature of the coldest month (January) is of -6.2 °C (21 °F), that of the warmest month (July) is of 15.5 °C (60 °F). The lowest record is -38.1 °C (33.1 °F), the highest is 33 °C (91 °F). Here are the average temperatures.
Ostersund - Average temperatures
Min (°C)-9-8-6-148111072-3-7
Max (°C)-3-217131620181361-1
Min (°F)161821303946525045362719
Max (°F)272834455561686455433430

Precipitation amounts to 525 millimeters (20.7 inches) per year: so, it is not abundant. It ranges from 25 mm (1 in) in the driest months (February, March) to 80 mm (3.1 in) in the wettest (July). Here is the average precipitation.
Ostersund - Average precipitation

On average, there are around 1,695 sunshine hours per year. Here are the average sunshine hours per day.
Ostersund - Sunshine


Best Time

The best time to visit Östersund 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.