Oslo weather in September
Oslo in September averages 13°C (55°F), 81 mm of rain and 5.2 hours of sun a day.
Of the twelve months in Oslo, September is the fourth warmest, the fifth wettest and the sixth sunniest.
- Average temp
- 13°C (55°F)
9–16°C · 47–62°F
- Rainfall
- 81 mm
Showers likely
- Sunshine
- 5.2 h
hours per day
What is Oslo like in September?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Oslo in September?
A light rain jacket
About 81 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 9°C (47°F).
September compared with August and October
September in Oslo is 4.4°C cooler than August and 23 mm drier than it, which averages 17°C (62°F).
September in Oslo is 5.8°C warmer than October and 13 mm drier than it, which averages 7°C (44°F).
Daylight in Oslo in September
On 15 September the sun is up for 12 hours 51 minutes in Oslo, rising about 06:45 and setting about 19:36 local time.
September ends 2 hours 36 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 5 hours 56 minutes short of June, the longest-lit month here.
Where to stay in Oslo
Dates are a starting point for September.
Travel guides for Oslo
What to read before you book.
Oslo weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | -2°C / 28°F | 58 mm |
| February | -2°C / 29°F | 46 mm |
| March | 2°C / 35°F | 40 mm |
| April | 7°C / 44°F | 48 mm |
| May | 12°C / 53°F | 60 mm |
| June | 16°C / 60°F | 80 mm |
| July | 18°C / 64°F | 86 mm |
| August | 17°C / 62°F | 104 mm |
| September | 13°C / 55°F | 81 mm |
| October | 7°C / 44°F | 94 mm |
| November | 2°C / 36°F | 84 mm |
| December | -1°C / 29°F | 54 mm |
Check another month
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FAQs about Oslo in September
September climate averages for Oslo, 1991–2020.
Oslo averages 13°C (55°F) in September, ranging from about 9°C (47°F) at night to 16°C (62°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 81 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 13°C (55°F) against 7°C (44°F) in October — 5.8°C warmer.
September is 4.4°C cooler than August, and 23 mm drier.
Yes. September falls inside the most comfortable stretch of the year here, April to September, on temperature and rainfall together.
About 5.2 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 51 minutes of daylight in mid-September, against 18 hours 47 minutes in June and 5 hours 57 minutes in December.
On 15 September, sunrise is about 06:45 and sunset about 19:36 local time. Both shift across the month — the month ends 2 hours 36 minutes shorter than it starts.
