Climate Insights for Superior

The climate in Superior is cool. The average annual temperature is 8°C and approximately 622mm of precipitation falls per year. May is the wettest month, receiving around 129mm of rainfall. Superior is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are December, January, February, when temperatures can drop to -10°C. Superior experiences heavy snowfall, typically from January through December.

Superior has a wide annual temperature range, spanning 39°C from the coldest to warmest months. The warmest month is July, when average highs reach 29°C and the mean temperature sits around 20°C. The coldest month is December, when overnight lows fall to -10°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between May and June, with a 9°C shift in average temperatures.

Superior is a relatively dry area, receiving approximately 622mm of precipitation annually, which averages out to around 52mm per month. The wettest month is May, averaging 129mm of rainfall. April and March also tend to see above-average precipitation. The driest month is November, with just 18mm. That's 111mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Superior receives heavy snowfall, accumulating around 251cm annually from January through December. The snowiest month is March, with approximately 66cm. Winter travel should account for significant snow cover.

Superior is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Superior, which began on June 21, 2026. Superior is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 29°C, while the coldest stretch bottoms out in December near -10°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Superior is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 53mm per month. By contrast, December can be quite cold with temperatures dropping to -10°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Superior based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.