Weather in Oslo

Planning your visit to Oslo or just want to stay updated on weather conditions? In this section, you will find the latest weather information, including current data, forecasts, and visual charts.

The climate in Oslo can be described as temperate continental, with four distinct seasons. The city experiences significant temperature fluctuations throughout the year, which is typical for this type of climate. Travelers should expect cold winters and moderately warm summers.

Winter in Oslo, lasting roughly from December to March, brings freezing temperatures, with averages around -4.5°C in January. Precipitation is frequent during this period, mostly as snow, although the total amount is low. Summer, from June to August, offers more comfortable weather with average temperatures around 15-16°C, and in July, the thermometer can rise to 20°C and above. Spring and autumn are transitional seasons with gradual temperature changes and an increase in rainy days, especially in autumn.

Despite the relatively small amount of monthly precipitation (2-4 mm), it is distributed quite evenly throughout the year. The number of days with precipitation varies from 7 in April to 14 in July, August, and December. This means that light rain or snow (depending on the season) is a fairly common occurrence, so tourists are advised to have appropriate clothing with them at any time of the year.

The temperature regime in Oslo is characterized by significant seasonal fluctuations throughout the year. The coldest month is usually January, when the average air temperature is about -4.5°C. During this period, average minimum temperatures can drop to -7.0°C, and maximums rarely exceed -2.1°C. It is slightly warmer in December and February, where average temperatures are -3.2°C and -2.8°C respectively. Conversely, the warmest month is July, with an average temperature of 16.6°C. In July, daytime highs average 20.7°C, while nighttime lows hover around 12.5°C.

The summer months in Oslo, from June to August, offer pleasant and moderately warm weather. Average daytime temperatures during this period range from 19.1°C in August to 20.7°C in July. Nights are generally cooler, with average minimums ranging from 11.0°C in June to 12.5°C in July. The difference between day and night temperatures in summer is quite noticeable, averaging 8-9 degrees, which ensures comfortable freshness in the evening. Overall, summer in Oslo can be described as pleasantly warm, without exhausting heat.

Winter in Oslo, covering the period from December to February, brings consistently frosty weather. Air temperatures steadily stay below freezing. Even daytime maximum temperatures in January and December usually do not rise above -1.2°C to -2.1°C. Night frosts are the norm, dropping to -7.0°C in January. Diurnal temperature fluctuations in winter are less pronounced than in summer, but the cold is felt constantly. The transitional seasons – spring and autumn – show gradual temperature changes: in April, the average temperature is 4.6°C, and in October – 6.6°C.

Precipitation in Oslo is distributed relatively evenly throughout the year in terms of total volume, and there is no pronounced rainy season or dry period here. Monthly rainfall is quite low and ranges from 2 mm to 4 mm. The least amount of precipitation, just 2 mm each, usually falls from February to May. Slightly more precipitation, 4 mm each, is characteristic of the summer months – July and August, as well as September.

Despite the small total amount, precipitation in Oslo is a frequent occurrence. The fewest days with precipitation are observed in April – on average about 7 days. The highest frequency of precipitation occurs in July, August, and December, when there are approximately 14 days with precipitation in each of these months. In other months, such as January, June, September, October, and November, the number of "wet" days ranges from 11 to 13, indicating regular, though not always heavy, precipitation.

The type of precipitation in Oslo depends directly on the season and air temperature. During the winter months, roughly from December to March, when average temperatures stay steadily below zero (for example, in January the average temperature is -4.5°C, and in December -3.2°C), precipitation falls mainly as snow. With the arrival of warmth, from May to September, when temperatures are consistently positive (for example, in July the average temperature is +16.6°C), precipitation takes the form of rain. In transitional periods, such as March (average temperature -0.2°C), April (average temperature +4.6°C, but with minimum night values around -0.3°C) and November (average temperature +1.7°C), mixed precipitation is possible: rain may alternate with wet snow or sleet, especially when the temperature fluctuates around the freezing mark.

When packing your suitcase for a trip to Oslo, it is important to consider the changeable nature of the weather and significant temperature fluctuations throughout the year. The key principle for a comfortable stay will be layering your clothes. This will allow you to easily adapt to temperature changes that may occur during the day. Regardless of the season, comfortable waterproof shoes for long walks around the city and its picturesque surroundings will be your indispensable companion. Considering that precipitation in Oslo is frequent (from 7 to 14 days with precipitation monthly, though not always heavy), do not forget to pack an umbrella or a light rain jacket to protect against sudden rain or wet snow.

For a trip to Oslo in winter (from December to March), when average temperatures drop below freezing (down to -7.0°C at night in January), you will need a serious set of warm clothes. Be sure to bring warm windproof outerwear (such as a down jacket or winter coat), wool or fleece sweaters, thermal underwear, as well as a warm hat, scarf, and gloves. Waterproof and insulated boots will help keep your feet warm and dry while walking through snowy streets. In summer (from June to August), the weather is significantly warmer, with average temperatures around 15-16°C and daily maximums up to 20.7°C in July. However, evenings can be cool, and rain is also not uncommon. Your summer wardrobe should include T-shirts, light jumpers or cardigans, trousers or jeans, as well as a light windbreaker or rain jacket. On sunny days, don't forget sunscreen and a hat. For the off-season (spring and autumn), a combination of the above is best, with a special focus on waterproof and windproof layers.