Fall in Oslo brings crisp air, shorter days, and a steady shift from mild September afternoons to chilly November mornings.
You’ll see daily highs drop from the mid-60s °F (around 18°C) in early September to the mid-30s °F (just above 0°C) by late November.
This steady cooling shapes the season, so it’s good to know what you’re in for.
Rain and cloud cover show up often during autumn, but early September sometimes surprises you with some of the clearest skies of the year.
As weeks pass, daylight hours shrink fast.
By late fall, you’ll notice much shorter days and early sunsets.
These changes set the rhythm for outdoor activities, whether you’re wandering city parks, hiking nearby trails, or just soaking up the seasonal colors.
Overview of Fall Weather in Oslo
Fall in Oslo brings cooler temperatures, shorter days, and a clear shift from rain to snow as the season goes on.
You’ll notice big changes in daylight, cloud cover, and precipitation types between early September and late November.
Key Climate Characteristics
Average daily highs drop from about 64°F (18°C) in early September to 34°F (1°C) by late November.
Lows fall from 48°F (9°C) to 25°F (-4°C).
Rainfall drops steadily, starting around 3.3 inches (84 mm) in September and ending near 1.8 inches (46 mm) in November.
At the same time, average monthly snowfall climbs from nearly zero to about 6 inches (15 cm).
Daylight shortens quickly.
In early September, you get over 14 hours of daylight, but by late November, only about 6.5 hours remain.
Sunsets slide from after 8:00 PM in September to just after 3:00 PM at the end of November.
Cloud cover increases too, with overcast skies more common in late fall.
By late November, the chance of cloudy conditions often reaches 70%.
Typical Weather Patterns
Early fall usually feels cool and damp, with frequent rain showers.
Cloudy skies show up more than half the time, but you might still catch a clear day or two in September.
By October, rainfall drops a bit, though light showers still pop up often.
Temperatures keep dropping, and mixed precipitation starts to show up, especially later in the month.
In November, snow starts to take over.
You’ll get days with steady snowfall or a mix of rain and snow.
Wind speeds stay moderate, averaging around 4–5 mph.
The colder air and shorter days make conditions feel a bit harsher.
The nearby Oslofjord cools quickly, with water temperatures falling from 60°F (16°C) in September to about 44°F (7°C) by late November.
That cooling makes the air feel even crisper.
Comparison With Other Seasons
Compared to summer, fall feels way darker and colder.
Summer highs often reach the low 70s°F (21–22°C), while fall temperatures steadily drop into the 30s°F.
Daylight also shifts from nearly 19 hours in midsummer to less than 7 hours in late fall.
Winter brings even colder conditions, with average highs near 30°F (-1°C) and lows often below 20°F (-7°C).
Snowfall gets more consistent, and daylight hours drop even more.
Spring, on the other hand, brings a gradual warming trend.
Snow melts, days get longer, and rainfall picks up again.
Fall stands out because it transitions fast from mild, rainy days to early winter snow in just three months.
Average Temperatures in Fall
Temperatures in Oslo cool quickly through the fall months.
Early in the season, you might still get some mild days, but by late fall, things turn much colder with freezing nights and frequent snowfall.
September Temperature Trends
September is the mildest month of fall in Oslo.
Average daytime highs start near 64°F (18°C) at the beginning of the month and drop toward 55°F (13°C) by the end.
Nights are noticeably cooler, with lows moving from about 48°F (9°C) down to 41°F (5°C).
You can still expect comfortable afternoons, especially in the first half of the month.
The air feels crisp, but not harsh, so it’s a great time for outdoor activities.
By late September, the chill sets in, and you’ll probably want a jacket even during the day.
Rain is common, but snow is still rare at this point.
October Temperature Trends
October brings a sharp drop in temperatures.
Daytime highs average around 46°F (8°C), while nighttime lows fall to about 36°F (2°C).
Frost becomes more frequent, especially in the mornings.
The change from early to late October is pretty noticeable.
Early in the month, you might get a few mild afternoons.
By the end, temperatures often hover near freezing, and icy mornings become the norm.
Snow showers can pop up late in October, though rain still shows up more often.
Colder evenings are typical, as temperatures often dip below 32°F (0°C) overnight.
November Temperature Trends
November is when winter really starts to take over.
Average highs settle near 37°F (3°C), and lows drop to about 27°F (-3°C).
Freezing temperatures become the norm, and snow is more likely.
The first half of November may bring a mix of rain and wet snow.
By the second half, snow cover gets more consistent, and daylight hours are much shorter.
November feels much colder than earlier months, thanks to both lower temps and limited sunlight.
Warm clothing is a must, as daytime highs often stay close to freezing and nights can fall into the lower 20s °F (-6°C).
Rainfall and Precipitation Patterns
During fall in Oslo, rain shows up often and tends to stick around, with totals rising as the season goes on.
You’ll notice wetter conditions in October and November compared to early fall, and there’s a clear rise in cloudy, damp days.
Monthly Rainfall Amounts
Rainfall in Oslo during fall climbs month by month.
September usually brings around 90–100 mm of precipitation, spread fairly evenly across the month.
By October, this rises to about 110–115 mm, making it one of the wettest months of the year.
November often stays in the same range, averaging 100–110 mm.
This trend means you’ll see more consistent rainfall as autumn moves forward.
Early in the season, it’s mostly rain, but by late November, precipitation can shift to a mix of rain and snow as temperatures drop.
| Month | Avg. Precipitation (mm) | Notes |
|---|---|---|
| September | ~95 mm | Mostly rain, mild temps |
| October | ~112 mm | Wettest month of fall |
| November | ~105 mm | Mix of rain and early snow |
Chance of Rainy Days
The number of rainy days also goes up in fall.
In September, you can expect about 14–15 days with measurable precipitation.
October usually brings 15–16 days of rain, while November averages 15–17 days.
Rain tends to come as steady showers, not quick storms.
Cloud cover is common, so many days just feel damp even if it’s not pouring.
By November, some wet days include sleet or light snow, especially in the evenings.
If you’re planning outdoor activities, know that you’ll probably deal with rain on about half the days each fall month.
Waterproof clothing and sturdy shoes? Not a bad idea.
Humidity Levels
Humidity in Oslo during fall stays pretty high, often between 75% and 85%.
The cooler air holds less moisture than summer, but frequent rain and cloud cover keep things damp.
In September, the air feels fresh but still a little humid, especially after rain.
By October and November, cooler temperatures and steady precipitation make the air feel heavier, with a lingering chill.
You might notice more indoor dampness, especially in older buildings.
If you’re staying in Oslo during fall, layering clothes helps you stay comfortable both outside and inside.
Daylight and Sunlight Hours
During fall in Oslo, you’ll notice daylight shrinking fast and sunlight getting weaker.
Days shorten quickly, and the amount of direct sunshine drops as cloud cover increases.
These changes affect not just how much light you see, but also how the city feels.
Daylight Duration Changes
Daylight hours in Oslo drop quickly from September through November.
In early September, you get about 12 hours and 50 minutes of daylight each day.
By late November, that shrinks to just over 7 hours.
The change is most obvious in October, when daylight slips by nearly 5 minutes per day.
You actually lose more than 2 hours of daylight over the month.
| Month | Avg. Daylight per Day |
|---|---|
| September | ~12h 51m |
| October | ~10h 03m |
| November | ~7h 29m |
By the end of fall, you get less than half the daylight you had at the start.
That’s a big part of Oslo’s seasonal rhythm.
Sunrise and Sunset Times
Sunrise and sunset times shift a lot in fall.
In early September, the sun rises around 6:15 AM and sets near 8:00 PM.
By late November, sunrise moves to about 8:30 AM, while sunset comes as early as 3:30 PM.
This means mornings stay darker longer, and evenings close in quickly.
You often find daylight packed into the middle of the day, which can definitely change how you plan things.
The low sun angle also makes the light softer and shadows longer.
Even at noon in November, the sun sits only about 10° above the horizon, compared to over 30° in September.
That lower position cuts brightness and warmth, even on clear days.
Wind and Weather Variability
During fall in Oslo, the air stays pretty calm, but shifts in temperature and cloud cover make conditions feel unpredictable.
You’ll notice light winds most days, plus frequent changes between clear skies, rain, and gray weather.
Typical Wind Speeds
Winds in Oslo during fall stay light, usually ranging from 1 to 2 meters per second (about 2–4.5 mph).
At 1 m/s, the air feels almost still.
At 2 m/s, you might notice a light breeze on your face.
On the Beaufort scale, this counts as light air to light breeze.
Smoke drifts a bit, and flags may move just a little.
Trees usually stay still, and you rarely hear the wind rustling leaves.
Calmer days come more often in September, while October and November bring slightly more noticeable breezes.
Wind rarely gets strong enough to disrupt outdoor plans.
If you’re walking along the Oslofjord, you might feel slightly stronger gusts than in sheltered areas.
Overall, wind speeds stay low enough that you can explore the city comfortably.
Weather Fluctuations
Fall weather in Oslo changes quickly as summer warmth gives way to winter cold.
September often brings mild days with average highs near 15°C (59°F).
By November, highs drop closer to 3°C (37°F).
Rainfall is common all season.
Light showers may pass quickly, but steady rain can last for hours, especially in October.
Cloud cover increases, so expect more gray skies as fall goes on.
Shorter daylight hours add to the sense of change.
In September, you still get long days, but by November, daylight is limited to just a few hours.
That makes weather shifts feel even more dramatic.
Because of these swings, it’s smart to dress in layers and carry waterproof clothing if you’ll be outside.
What to Expect: Outdoor Conditions in Fall
Fall in Oslo brings cooler air, shorter days, and more frequent rain.
You’ll notice crisp mornings, mild afternoons, and a steady drop in temperature as the season moves from September into November.
Preparing for changing conditions helps you stay comfortable and make the most of your time outdoors.
Clothing and Packing Tips
You’ll want to dress in layers so you can handle the changing temperatures. Early fall days usually hit around 15°C (59°F), but those highs can slide down to about 5°C (41°F) by late fall.
Nights get chilly, especially in November when temps sometimes drop close to freezing.
Definitely toss a waterproof jacket in your bag, since light or moderate rain happens pretty often. A windproof outer layer helps too, because the fjord breeze can make things feel colder than you’d expect.
Pack comfortable walking shoes with solid grip. Wet leaves and the occasional morning frost can make paths a bit slick.
By mid to late fall, even if you don’t always need them, a hat, scarf, and gloves come in handy.
If you’re thinking about longer hikes, go for wool or synthetic base layers. They’ll keep you warm even if you get damp. Cotton’s not your friend here—it just hangs onto moisture and chills you down.
Outdoor Activities Suitability
You can still get outside and do plenty in the fall, but the conditions really depend on the month. In September, hiking trails and city parks stay open, and the trees put on a colorful show. You’ll get about 12 to 13 hours of daylight then.
By October, daylight drops to around 10 hours, and trails tend to be wetter. That’s a good moment for shorter hikes, cycling, or just wandering around the city.
When November rolls in, daylight shrinks to about 6 or 7 hours. The cold makes longer outdoor trips less appealing. Still, walking tours, fjord views, and sometimes early winter fun in the hills are all possible if there’s a dusting of snow.
Rain shows up a lot, so it’s smart to keep your plans flexible and have some indoor options in your back pocket in case the weather turns rough.
Long-Term Trends and Climate Insights
Oslo’s fall climate changes fast—temperatures drop, daylight hours get shorter, and precipitation patterns shift from rain toward snow. Over the years, records show gradual shifts in temperature, precipitation, and when the seasons really start. These changes matter for daily life and for planning trips.
Recent Climate Changes
You can spot clear warming trends in Oslo when you look at recent decades compared to older weather data. Average fall temperatures now run a bit higher, especially in September, which tends to stay milder longer than it used to.
This delay means the first frost comes later, and the snowy season doesn’t last as long.
Rainfall in early fall happens more often now, and snow shows up later than before. October and November bring more days where rain flips to snow within a few hours.
Another thing you might notice: there are fewer daylight hours, but nights aren’t as cold. The days still get shorter fast, but with warmer nights, you get more frost-free evenings than in years past. That kind of change messes with vegetation, the timing of the growing season, and even what local wildlife gets up to.
Historical Weather Data
Oslo’s climate falls under the humid continental (Dfb) category. If you look back over the years, average annual temperatures usually sit around 6°C (43°F).
During fall, temperatures drop steadily, starting at about 18°C in early September and sliding down to nearly 0°C by late November.
Rainfall plays a big role here. Oslo typically gets about 1,000–1,200 mm of precipitation per year, and fall contributes a good chunk of that.
September tends to bring the most rain, while November kicks off the snow season.
Snowfall averages over 170 cm per year, and it usually starts piling up in late fall.
The growing season wraps up in early October, right as temperatures take a dive and rain gives way to snow.
Despite some recent warming, these patterns haven’t really changed much.