worldweather20°Cexceptionally warm
usually 14°C–18°C
warmer than 93% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
Weather in Oslo - 14-day forecast
Detailed weather forecast for Oslo, Norway: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Oslo
today☁️
20°💧 1.2 mm
Sun☁️
23°💧 0.5 mm
Mon🌧️
16°💧 5.8 mm
Tue🌧️
19°💧 1.7 mm
Wed🌧️
14°💧 7.1 mm
Thu🌧️
18°💧 0.2 mm
Fri🌧️
16°💧 0.8 mm
Sat🌧️
11°💧 3.4 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Sunday 6 Sept in Oslo, the forecast high is 23°C. Typical daytime temperatures at this time of year range from 14°C to 18°C, so it will be exceptionally warm. It is warmer than 99% of similar days.
23°Cexceptionally warm
usually 14°C–18°C
warmer than 99% of similar days
night: exceptionally warm
rain: typical rainfall
wind: lighter than usual
16°Cnear normal
usually 13°C–18°C
night: exceptionally warm
rain: more rain than usual
wind: exceptionally strong
19°Cexceptionally warm
usually 13°C–18°C
warmer than 90% of similar days
night: warmer than usual
rain: typical rainfall
wind: exceptionally strong
14°Cnear normal
usually 13°C–18°C
night: exceptionally warm
rain: more rain than usual
wind: stronger than usual
18°Cwarmer than usual
usually 13°C–17°C
warmer than 86% of similar days
night: warmer than usual
rain: typical rainfall
wind: typical
16°Cwarmer than usual
usually 13°C–17°C
warmer than 73% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 16°C by day. The coolest year was 1985 (11°C) and the warmest was 2021 (20°C). The current forecast averages 18°C - higher than in 89% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
Weather warnings - Oslo
No active weather warnings for Oslo (region: Akershus). The national weather service is not forecasting dangerous conditions.
14-day forecast - Oslo
Oslo 30 & 45-day weather - long-range outlook
Next 16 days · forecast
17°
around 11° at night · days with rain: 7
Weeks 3-4 · avg for September
16°
around 6° at night · rain chance 63%
Weeks 5-7 · avg for October
11°
around 2° at night · rain chance 69%
The 30 & 45-day outlook for Oslo: the next 16 days are a numerical forecast updated daily - on average 17° by day and 11° at night. Further out we rely on multi-year climate averages: around 16° in September, and about 11° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Oslo
Saturday5 September 2026
☁️20°overcast clouds
Sunday6 September 2026
☁️23°overcast clouds
Monday7 September 2026
🌧️16°moderate rain
Tuesday8 September 2026
🌧️19°light rain
Wednesday9 September 2026
🌧️14°moderate rain
Thursday10 September 2026
🌧️18°light rain
Friday11 September 2026
🌧️16°light rain
Saturday12 September 2026
🌧️11°light rain
Sunday13 September 2026
☁️18°broken clouds
Monday14 September 2026
☁️14°overcast clouds
Tuesday15 September 2026
🌤️17°scattered clouds
Wednesday16 September 2026
🌧️19°light rain
Thursday17 September 2026
🌧️17°light rain
Friday18 September 2026
☀️15°clear sky
Saturday19 September 2026
☁️15°broken clouds
Sunday20 September 2026
☁️16°broken clouds
UV index in Oslo - is it safe to sunbathe?
Today the UV index in Oslo is 4 (moderate) - unprotected fair skin can burn in about 55 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
Pollen in Oslo - info for allergy sufferers
Today ragweed pollen is highest in Oslo - about 21 grains/m³, moderate level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.
Air quality and smog in Oslo
Air quality in Oslo is currently very good. Fine particulate PM2.5: 4.6 µg/m³, PM10: 6 µg/m³.
| City | PM2.5 (µg/m³) | PM10 (µg/m³) | Air quality |
|---|---|---|---|
| Oslo | 4.6 | 6 | very good |
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 03:00).
Oslo weather through the year
Warmest, driest months on average: May, June, July, August.
Upcoming public holidays in Norway: Christmas Day — 25 December · St. Stephen's Day — 26 December · New Year's Day — 1 January.
Nearby and related places
FAQ - Oslo weather
What is the weather like in Oslo today?
Today it is about 20° during the day and 13° at night, overcast clouds.
How far ahead can I check the forecast for Oslo?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.