Weather in Sudbury

Planning a trip to Sudbury? In this section, you will find the most up-to-date weather information, including detailed charts and forecasts for the near future.

The climate of Sudbury can be described as humid continental, characterised by significant seasonal contrast. The weather here changes from severe, snowy winters to warm and comfortable summers. This place is ideal for those who appreciate nature's diversity and want to witness the true Canadian changing of the seasons.

The winter months, especially January and February, are distinguished by low temperatures, which often drop below -14°C. During this time, the city is blanketed in snow, creating excellent conditions for winter sports. Summer, on the other hand, brings long-awaited warmth: in July and August, the air warms up to 25°C, making this period the most popular for visiting attractions and relaxing by the lakes.

Precipitation falls quite evenly throughout the year, so there is no pronounced rainy or dry season here. On average, travellers can expect between 10 and 14 days with precipitation per month, whether it be winter snowfall or summer rain. When setting off for Canada, it is worth keeping this feature in mind and always having clothes on hand that match the forecast.

The climate in Sudbury is characterised by pronounced seasonality with a wide annual temperature range. Winters here are truly Canadian — severe and frosty. The coldest month is traditionally January with an average of around -10.2°C. During this period, night-time temperatures regularly drop to -14.7°C and lower, so travellers planning a visit from December to February must ensure they have high-quality warm clothing.

The summer season, by contrast, brings very comfortable weather to the region without extreme heat. The warmest month is considered to be July, when daytime highs reach an average of 25.3°C. This time is ideal for exploring natural attractions, as the air warms up to pleasant levels but does not become stifling. Even at the height of summer, there is a noticeable temperature difference between day and night: after sunset, the air cools to 14-15°C, bringing welcome freshness.

Transitional seasons in Sudbury pass quite dynamically. May marks the definitive arrival of warmth with an average temperature of 12.2°C, allowing one to enjoy the spring sun. Autumn begins with a mild September, however, it becomes cool as early as October (around 8.3°C), and by November the city begins to prepare for winter, with average temperatures dropping into negative values.

Precipitation in Sudbury is distributed fairly evenly throughout the year, so tourists should be prepared for weather changes in any season. There is no pronounced dry period here: the number of days with precipitation consistently varies from 10 to 14 per month. In winter, from December to March, due to sustained sub-zero temperatures, precipitation falls mainly as snow, forming picturesque winter landscapes.

The "wettest" months in terms of inclement weather frequency are April and October. During these periods, up to 14 days with precipitation are recorded, and the amount in October reaches the annual maximum (about 4 mm). In spring, this is often mixed precipitation or rain accompanying the thaw, and in autumn — cool rains heralding the imminent arrival of winter.

In summer, from June to August, rains are also not uncommon and occur approximately 12 times a month. However, during this warm time of year, when the average temperature reaches 20°C, they are often refreshing in nature. The driest months, most favourable for walking, are considered to be March, May, and September, when the number of rainy or snowy days drops to a minimum — about 10 per month.

When packing for Sudbury, it is important to consider the local climate's pronounced seasonality. Winters here are truly Canadian: snowy and frosty, with temperatures often dropping below -14°C. For a trip between December and March, be sure to pack quality thermal underwear, a warm windproof puffer jacket, a hat, a scarf, and mittens in your suitcase. Pay special attention to footwear: it should be insulated, water-resistant, and have a non-slip sole for comfortable movement along the streets.

Summer in Sudbury delights with pleasant warmth with average highs around +25°C in July, so light items made from natural fabrics, sunglasses, and sun cream are suitable for this season. However, even in summer, evenings can be cool, so a light jacket or hoodie would not be amiss. Given that precipitation falls quite evenly throughout the year (on average 10–12 rainy days per month), a compact umbrella or a light raincoat is worth keeping on hand in any season.

For spring and autumn, when the weather is most changeable, the best strategy is the layering principle. In April and October, when the probability of precipitation increases, give preference to waterproof outerwear and footwear. Also, do not forget to bring a comfortable pair of trainers or walking boots, as the city and its surroundings are conducive to long walks in the fresh air.