Weather in Sundsvall

Planning your day in Sundsvall? Below you will find the most up-to-date information on weather conditions, including detailed charts and a forecast for the near future.

The climate of the city of Sundsvall can be described as moderately cold, which is typical for the northern regions to which Sweden belongs. Seasonality is pronounced here: winters are long and snowy, whilst summers are short but pleasant and mild. Proximity to the Gulf of Bothnia has some influence on the weather, but travellers should be prepared for cool conditions prevailing for most of the year.

Winter months, especially January and February, are distinguished by stable sub-zero temperatures, which average down to -4...-5°C, and sometimes reach -7.5°C. Summer brings long-awaited warming: in July and August, the average temperature is around +15...+16°C, and on the finest days, the air warms up to a comfortable +20°C. This is the best time for sightseeing and nature walks.

A characteristic feature of the local climate is the fairly even distribution of precipitation throughout the year. In any month, whether May or October, the number of days with precipitation varies from 8 to 14. This means that even in the driest season, the likelihood of rain or snow remains, so having waterproof clothing and comfortable footwear will be relevant for a tourist on any trip.

The climate of Sundsvall is distinguished by pronounced seasonality, characteristic of the northern regions of Sweden. The winter period here is genuine and frosty: the coldest months are January and February, when the average temperature holds around -4.5...-5°C. Night frosts at this time reach an average of -7.5°C, creating ideal conditions for preserving snow cover, whilst daytime figures rarely rise above -1.5°C, maintaining the atmosphere of a true Scandinavian winter.

Summer in the city is mild and refreshing, without exhausting heat, making it a wonderful time for excursions and outdoor activities. The warmest month is traditionally July, when the air warms up during the day to a comfortable average of 20.0°C. In June and August, daytime temperatures also remain pleasant, hovering between 18-19°C. However, travellers should take into account diurnal fluctuations: even at the height of summer, nights can be cool, with values around 10-12°C, so a light jacket will not go amiss.

Transitional seasons are quite contrasting. Spring arrives gradually: whilst the breath of winter is still felt in March with average values around -1.8°C, by May the city comes alive with daytime highs of +14°C. Autumn, conversely, brings rapid cooling, and by November the average temperature drops to -0.1°C, heralding the imminent start of winter. Such a temperate climate requires tourists to approach their wardrobe carefully, especially in the off-season.

Precipitation in Sundsvall is distributed quite evenly throughout the year, although its character and intensity change depending on the season. Travellers should be prepared for the fact that the weather here is changeable, and there is no clearly defined dry period. Nevertheless, statistically, the lowest number of days with precipitation falls at the end of winter and spring, especially in February and May (about 8 days).

Summer and mid-autumn are the times when precipitation falls most frequently. The wettest months are considered to be July, August and October, with about 14 rainy days recorded in each. In the warm season, this is predominantly rain, which can vary from light drizzle to more noticeable downpours, so having waterproof clothing or an umbrella will be very handy whilst walking around the city.

With the arrival of the cold, from November to March, rain gives way to snowfall, as the average temperature drops below freezing. Winter months, especially December and January, are also quite rich in precipitation (up to 13 days), ensuring the picturesque snow cover characteristic of a Swedish winter.

When setting off for Sundsvall, it is important to remember the changeable Swedish climate and the principle of layering in clothing. Winters here are snowy and frosty, so from December to March you will definitely need quality thermal underwear, warm woollen sweaters and a windproof winter jacket or down coat. Do not forget a hat, scarf and mittens, as well as insulated footwear with non-slip soles, to walk comfortably along snowy streets and enjoy winter views without the risk of freezing.

Summer in this region is usually mild and pleasant, but do not expect intense heat: the average temperature holds around +15...+20°C. Even in July and August, evenings can be cool, so it is worth packing a fleece, a light cardigan or a windbreaker in your suitcase. Given that rainy days happen quite often throughout the year, a compact umbrella or raincoat will become your faithful companions. For long walks around the city and nature, be sure to bring comfortable, broken-in shoes, and do not neglect sunglasses on sunny days.