Your September weather guide
CoolWeather in Norwegian Fjords in September
September suits a Norwegian Fjords trip if you are happy with cool weather and plans that can change when rain arrives. Average daytime highs are around 14°C, nights fall to 9°C, and about 18 days have rain. That makes waterproofs more useful than summer clothes. Go for time outdoors with warm layers and flexibility, rather than for heat or swimming. The main catch is the wet weather, not extreme cold.
Long-term climate averages for Bergen, not a forecast · 1991-2020
Norwegian Fjords, month by month
Your snapshot
At a glance
The useful details for Bergen.
- Average daytime high
- 14.2°C
- 9 in 10 days stay below 18°C
- Average night-time low
- 9.0°C
- coldest 10% of nights: 6°C or lower
- Compared with London
- -4.4°C
- London averages 18.6°C in September
- Sea temperature
- 13.6°C
- year to year: 13°C to 15°C
- Sunshine per day (est.)
- 3.3h
- 26% of 12.5 h of daylight
- Rainy days (1 mm+)
- 18
- 245 mm over the month
- Humidity
- 84%
- Days over 25°C
- 0%
- none over 30°C
- Record high 1991-2020
- 23.5°C
- 2016-09-16
- Record low 1991-2020
- 0.4°C
- 1995-09-30
- Flight from London
- ≈ 2 h 6 min
- 1083 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How September compares
September is the 4th warmest month of the year in Norwegian Fjords. Against London's average high of 18.6°C in September, Norwegian Fjords is 4.4°C cooler by day and 2.2°C cooler at night.
Daytime and night-time in September
The typical September day in Norwegian Fjords peaks at 14.2°C, but that is an average: the warmest 10% of days reach 18.1°C or more. Days over 25°C are rare. Nights average 9.0°C; one night in ten drops to 5.6°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest September day here reached 23.5°C (2016-09-16) and the coldest night 0.4°C (1995-09-30).
Rain in September
Wet (more than 8 rainy days): about 18 days with 1 mm or more, 245 mm in total. Year to year it varies a lot - the wettest September was 2018 with 569 mm, the driest 1993 with 44 mm. Humidity averages 84%.
Sea temperature in September
The sea averages 13.6°C - too cold for most (under 18°c). Depending on the year it ranges from 12.8°C to 14.5°C. For the warmest sea here, come in August (15.3°C).
Sunshine and daylight
Around 3.3 hours of sunshine a day (estimated from cloud cover), 12.5 hours of daylight: the sun rises about 07:06 and sets about 20:01 local time in mid-September. Average cloud cover is 74%.
Is September a good time to visit Norwegian Fjords?
September is not the strongest month here: cool days and frequent rain. The best months for Norwegian Fjords on our scoring are May, July, June.
Cool days call for layers
Expect to keep a layer handy rather than spend the day in a T-shirt. The warmer days reach around 18°C or more, which can feel comfortable for walking, but that is not the everyday expectation. At the colder end, nights can fall to around 6°C or below, so pack a warm jumper or fleece for evenings. A waterproof outer layer and comfortable shoes that cope with wet conditions are sensible choices. September suits travellers who prefer moving around in cool air to sitting outside in summer warmth. Midday heat is unlikely to dictate your plans; staying warm and dry matters more.
Leave room to change your plans
Rain is the main reason to keep your itinerary flexible. September brings around 245 mm of rainfall, so wet weather deserves more thought than simply packing a small umbrella. Avoid making every outdoor plan dependent on clear skies, and be ready to use a dry spell when it comes. There are about 12.5 hours of daylight, but only 3.3 hours of sunshine a day on average: daylight gives you time outside, not a promise of sun. This is a reasonable month if you can accept damp days and rearrange activities. If sunshine is central to your holiday, September is a harder month to recommend.
A little perspective
Norwegian Fjords through the year
September is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 2.4°C | -1.2°C | 6.1°C | 1.3 | 247 | 20 | 0% |
| February | 2.7°C | -1.7°C | 5.1°C | 2.1 | 209 | 17 | 0% |
| March | 4.7°C | -0.4°C | 4.7°C | 3.0 | 192 | 18 | 0% |
| April | 8.7°C | 2.2°C | 5.7°C | 4.7 | 133 | 16 | 0% |
| Maybest | 12.3°C | 5.5°C | 8.7°C | 6.7 | 117 | 14 | 0% |
| Junebest | 15.1°C | 8.9°C | 11.7°C | 6.1 | 118 | 14 | 1% |
| Julybest | 17.1°C | 11.3°C | 14.1°C | 5.3 | 149 | 16 | 3% |
| August | 17.1°C | 11.4°C | 15.3°C | 4.3 | 186 | 17 | 2% |
| SeptemberSelected | 14.2°C | 9.0°C | 13.6°C | 3.3 | 245 | 18 | 0% |
| October | 9.7°C | 5.1°C | 11.3°C | 2.5 | 258 | 19 | 0% |
| November | 5.4°C | 1.7°C | 9.3°C | 1.6 | 256 | 19 | 0% |
| December | 3.0°C | -0.7°C | 7.5°C | 1.2 | 269 | 20 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in September
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Norwegian Fjords in September FAQs
Plain answers, grounded in the averages.
Is Norwegian Fjords hot in September?
Norwegian Fjords is cool in September: the average daytime high is 14.2°C and nights average 9.0°C. Days over 25°C are rare in September.
Can you swim in the sea in Norwegian Fjords in September?
The sea around Norwegian Fjords averages 13.6°C in September, which is cold for swimming without a wetsuit. Between 1991 and 2020 it ranged from 13°C to 15°C depending on the year.
How much does it rain in Norwegian Fjords in September?
Norwegian Fjords sees about 18 rainy days (1 mm or more) and 245 mm of rain in a typical September. The wettest September between 1991 and 2020 was 2018 (569 mm) and the driest was 1993 (44 mm).
How sunny is Norwegian Fjords in September?
Norwegian Fjords gets around 3.3 hours of sunshine a day in September out of 12.5 hours of daylight (estimated from average cloud cover).
How does Norwegian Fjords compare with the UK in September?
Norwegian Fjords is on average 4.4°C cooler than London by day in September (14.2°C against 18.6°C).
What is the hottest September on record in Norwegian Fjords?
Between 1991 and 2020 the hottest September day in Norwegian Fjords reached 23.5°C on 2016-09-16, and the coldest night dropped to 0.4°C on 1995-09-30.
Is the sea warm enough for swimming?
The sea averages 13.6°C in September, which is cold rather than comfortably swimmable. If relaxed sea swimming is important to your holiday, this is not a good fit. Treat any swim as a cold-water activity, not a way to cool off.
How does it compare with London in September?
The Norwegian Fjords are noticeably cooler: the average daytime high is 14.2°C, compared with London's 18.6°C, a difference of 4.4°C. Pack for that cooler feel rather than assuming clothes suited to September in London will be enough.
Which months are better alternatives?
May, July and June are the strongest alternatives for overall weather. September is still among the warmer months locally, but its cool, wet conditions make it less suitable if weather is your main reason for choosing when to travel.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Bergen. Sea temperature from the nearest 5 km sea cell, 2 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C