The summer months of June through September can be very warm and humid with temperatures between 20 to 40°C. The average summer temperature is 36°C, although the humidity can also be very high. Lighter clothing such as cotton fabrics is recommended for summer months. Starting in October through April the weather turns gradually colder, averaging at about 0°C, but periodically temperatures are as low as below down to -10°C to -20°C. You will need warm winter clothes: insulated coat(s) or jacket(s), scarves, gloves, hats, warm boots, sweaters, and thermal innerwear. Click here to get the averiage termperature in Mankato from January to December.