Oslo is at its most pleasant from mid June to August. For walking, go from mid May to September. It is rarely warm enough for sunbathing.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
Sun is not what Oslo is for: the Sunbathing rating tops out at 21, mostly because it is too cool. The clearest skies come in May, when the sky is typically 61% covered at midday (often cloudy).
For being outside, go from mid June to August. It peaks in mid July, at 73. Avoid October to mid April for this: it falls to 0, mostly because it is too cold.
The walking season here runs from mid May to September. It peaks in late August, at 86. The weakest stretch is from late November to early March, when it drops to 0, mostly because it is too cold.
The snow season here runs from mid December to early February. It peaks in early January, at 58. The weakest stretch is from mid May to September, when it drops to 0, mostly because it is too mild. Snow here is a proxy: cold enough for snow to hold, with precipitation likely. It is not measured snow depth.
The year, measured
The average temperature in Oslo over the whole year is 6°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -5°C. Oslo has no sharply defined rainy season: the chance of rain on a given day runs from 14% in April, the driest month, to 29% in November, the wettest. Winds in Oslo are highest in April, averaging 3.4 m/s (12 km/h), and lightest in December, at 3.0 m/s (11 km/h). The prevailing wind is from the S. The clearest skies in Oslo come in May, when the sky is typically 58% covered; November is the cloudiest month, at 77%.
Month by month Oslo climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | -3°C | -5°C | -8°C | 22% | 73% | 3.2 m/s | 0 | 0 | 0 |
| February | -1°C | -3°C | -5°C | 22% | 71% | 3.2 m/s | 0 | 0 | 1 |
| March | 3°C | -2°C | -2°C | 19% | 68% | 3.3 m/s | 0 | 0 | 7 |
| April | 8°C | 2°C | 4°C | 14% | 59% | 3.4 m/s | 3 | 0 | 30 |
| May | 14°C | 8°C | 10°C | 17% | 58% | 3.3 m/s | 28 | 1 | 64 |
| June | 18°C | 13°C | 16°C | 19% | 60% | 3.3 m/s | 55 | 7 | 76 |
| July | 20°C | 14°C | 18°C | 18% | 62% | 3.1 m/s | 68 | 13 | 72 |
| August | 18°C | 12°C | 16°C | 17% | 63% | 3.1 m/s | 64 | 2 | 84 |
| September | 14°C | 9°C | 12°C | 21% | 68% | 3.2 m/s | 29 | 0 | 75 |
| October | 8°C | 5°C | 4°C | 28% | 71% | 3.4 m/s | 1 | 0 | 35 |
| November | 2°C | 1°C | -2°C | 29% | 77% | 3.3 m/s | 0 | 0 | 8 |
| December | -1°C | -2°C | -6°C | 29% | 76% | 3.0 m/s | 0 | 0 | 1 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Oslo weather by season
Year round, Oslo has days of about -3°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -5°C to 14°C through the year, and the average temperature over the year is 6°C around the clock. Rain is most likely around November and least likely around April. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Oslo weather in winterDecember to February
Winter in Oslo has typical daily highs of about -2°C and lows of about -3°C, with a 24% chance of rain on a given day.
Oslo weather in springMarch to May
Spring in Oslo has typical daily highs of about 9°C and lows of about 3°C, with a 17% chance of rain on a given day.
Oslo weather in summerJune to August
Summer in Oslo has typical daily highs of about 19°C and lows of about 13°C, with a 18% chance of rain on a given day.
Oslo weather in autumnSeptember to November
Autumn in Oslo has typical daily highs of about 8°C and lows of about 5°C, with a 26% chance of rain on a given day.
When is the rainy season in Oslo?
Oslo has no sharply defined rainy season: the chance of rain on a given day runs from 14% in April, the driest month, to 29% in November, the wettest.
What time of year is Oslo windiest?
Winds in Oslo are highest in April, averaging 3.4 m/s (12 km/h), and lightest in December, at 3.0 m/s (11 km/h). The prevailing wind is from the S.
What is the average temperature in Oslo year round?
The average temperature in Oslo over the whole year is 6°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -5°C.
Where to go instead in early January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.