Early September 1 September
67°F
Typical afternoon high
31% historical wet-day frequency
Norway · City
Oslo & around
in September.
Is September a good time?
Mild days.
Fewer overnight stays than August.
September averages 62°F afternoons and 61°F seas, with about 10 rain days. Later September is typically cooler.
- Afternoons
- 62°F
- Sea
- 61°F
- Visitor demand
- 71%of July peak
Historical Oslo og Viken regional averages, not a forecast or a measure of queues. Overnight demand compares average stays per day. Covers Oslo; conditions vary within the region.
Overall match
6.2/10 · scores & prioritiesWhat matters most?
Weather 50% · Crowds 30% · Cost 20%
#6 of 12 months here · Balanced mix
Weather6.9/10Good
CrowdsBusy seasonvs its own year; overnight stays do not measure queues
CostExpensivefor Europe
Overall combines weather, overnight demand and cost. It does not include sea temperature.
Plan your September
What to expect.
What should I pack?
Afternoons around 62°F (17°C): light layers; nights around 47°F (9°C): a warm coat. Bring rain gear: about 10 days with at least 1 mm of rain. About 13 hours of daylight.
Can I swim in September?
The sea averages 61°F. Our swimming guide: cold: short dips, or a wetsuit. Your comfort will vary. This is open water near the coast, not a beach-specific reading.
Monthly coastal averages from NOAA, 2011–2025. Sea temperature is separate from the weather and Overall scores.
A typical day: temperatures & daylightAfternoons, nights, sea temperature & daylight Show detailsHide details
About 13 hours of daylight.
The sun rises about 06:46 and sets about 19:46 (local time, mid-month). Mornings start around 47°F (9°C); afternoons reach about 62°F (17°C). Expect rain on about 10 days in a typical September.
Typical afternoon
62°F (17°C)
average daily high, 15 recent Septembers
Night low
47°F (9°C)
average daily minimum
Sea
61°F (16°C)
cold; open water near the coast, NOAA satellite record 2011–2025
Daylight
13h 00m
on the 15th, computed from latitude
Early, middle or late?
Early or late September?
Early September is typically warmer. The afternoon high averages 67°F on the 1st, versus 57°F on the 30th.
Mid September 15 September
63°F
Typical afternoon high
33% historical wet-day frequency
Late September 30 September
57°F
Typical afternoon high
32% historical wet-day frequency
Historical daily averages from 2011–2025, smoothed over two weeks. A seasonal pattern, not a forecast. This does not establish which week has the lowest prices or fewest visitors.
Daily calendar & holiday datesSeptember 2027 · historical weather & dated holidays Show calendarHide calendar
September 2027 calendar
Weather shows historical patterns, not a forecast. Holidays and events use the dates shown for 2027.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 167° | 267° | 367° | 466° | 566° | ||
| 666° | 765° | 865° | 965° | 1064° | 1164° | 1264° |
| 1364° | 1463° | 1563° | 1662° | 1762° | 1861° | 1961° |
| 2060° | 2160° | 2260° | 2359° | 2459° | 2559° | 2658° |
| 2758° | 2858° | 2957° | 3057° |
Afternoon high rain likely (25%+) local school holidays public holiday event
School-holiday dates for September 2027 aren't available in our data yet. A day without a school marker doesn't mean schools are open.
Afternoons cool from about 66°F (19°C) in the first week to 58°F (14°C) in the last. The chance of a wet day runs 29–36%.
Crowds, cost and getting there
Visitor season
Will it be busy?
Busy season. September averages 71% of July's overnight stays per day. Fewer overnight stays than August.
Overnight stays across Oslo og Viken do not measure queues, day visitors or congestion at individual sights.
Hotel price season
Will it be cheaper?
A little above usual. Historical regional hotel revenue (2024–2025 monthly average): €129 per occupied room-night. An average, not a booking quote.
Fewer overnight stays do not automatically mean cheaper rooms. Check actual quotes for your trip.
Historical hotel average
€129
2024–2025 monthly average; hotel revenue per occupied room-night; not a current booking quote. +6% vs this region's usual month.
Norway as a whole
Well above EU average
2024 restaurants and hotels price level: 140 where the EU average is 100. A relative index, not a room rate.
Recorded US nonstop flights · 2024
Recorded this month
from Newark; 2024 schedule, Eurostat
The historical regional amount comes from Statistics Norway (SSB), table 14168: hotel accommodation revenue per occupied room; the country price level is national. Hotel averages are not live booking quotes.
Year-to-year variation
How much does September vary?
Across the recorded years
In the 15 years from 2011 to 2025, the month's afternoons averaged between 59°F (15°C) and 67°F (19°C); in 12 of them they were within 3°F (1.5°C) of the typical 62°F (17°C). Rain days ranged from 5 to 14; half the years had 8–12.
Rain days in each September
Rain days
10
at least 1 mm, typical year; about 13 in a wet year
Mostly sunny days
4 of 30
cloud cover under 30%
Years with a 95°F+ day
0 of 15
no September in the last 15 years had a day at or above 95°F (35°C)
Good weather days
18 of 30
rated very good or better
See every recorded SeptemberHistorical monthly averages, year by year Show detailsHide details
| Year | Afternoon high | Rain days |
|---|---|---|
| 2011 | 62°F | 11 |
| 2012 | 60°F | 11 |
| 2013 | 61°F | 6 |
| 2014 | 64°F | 6 |
| 2015 | 62°F | 13 |
| 2016 | 67°F | 5 |
| 2017 | 59°F | 13 |
| 2018 | 62°F | 10 |
| 2019 | 60°F | 12 |
| 2020 | 63°F | 9 |
| 2021 | 64°F | 8 |
| 2022 | 60°F | 9 |
| 2023 | 65°F | 9 |
| 2024 | 63°F | 10 |
| 2025 | 63°F | 14 |
Checked against 56 local weather stations. How we check
Compare dates
August, September
or October?
| Typical conditions | Aug | Sep | Oct |
|---|---|---|---|
| Afternoons | 69°F | 62°F | 50°F |
| Sea | 65°F | 61°F | 54°F |
| Rain days | 13 | 10 | 12 |
| Overnight demand | 93% | 71% | 63% |
August: Warmer afternoons, warmer sea and more rain days than September. More overnight demand. August guide →
October: Cooler afternoons, cooler sea and more rain days than September. Less overnight demand. October guide →
Overnight demand measures accommodation stays, not queues. Sea temperatures are monthly coastal averages.
Compare any of the 12 monthsChoose another month and compare it with September Show comparisonHide comparison
Yellow marks the top three months on the Balanced mix. September stays as your reference.
April has fewer overnight stays than September, with a similar or higher Weather score.
Your comparison
September or August?
Overnight stays are 93% of the busiest month.
Historical regional hotel revenue (2024–2025 monthly average): €129 per occupied room-night. An average, not a booking quote.
Read the August guide →| Typical conditions | September | August |
|---|---|---|
| Afternoons | 62°F | 69°F |
| Nights | 47°F | 53°F |
| Sea | 61°F | 65°F |
| Rain days | 10 | 13 |
| Visitor season | Busy season | Peak season |
| Overall / 10 | 6.2 | 6.2 |
| Month rank | #6 | #5 |
Every month, in detail Show detailsHide details
| Month | Overall | Rank | High | Low | Sea | Rain days | Weather | Visitor season |
|---|---|---|---|---|---|---|---|---|
| January | 4.4 | #11 | 30°F | 21°F | 40°F | 10 | 3.4 | Moderate season |
| February | 4.9 | #9 | 34°F | 23°F | 38°F | 9 | 3.9 | Moderate season |
| March | 5.9 | #7 | 43°F | 27°F | 39°F | 7 | 5.0 | Moderate season |
| April | 6.6 | #2 | 53°F | 34°F | 44°F | 6 | 6.2 | Moderate season |
| May | 6.7 | #1 | 63°F | 43°F | 52°F | 9 | 7.4 | Busy season |
| June | 6.4 | #3 | 70°F | 51°F | 60°F | 10 | 8.5 | Busy season |
| July | 6.2 | #4 | 73°F | 55°F | 64°F | 12 | 8.7 | Peak season |
| August | 6.2 | #5 | 69°F | 53°F | 65°F | 13 | 8.5 | Peak season |
| September | 6.2 | #6 | 62°F | 47°F | 61°F | 10 | 6.9 | Busy season |
| October | 5.6 | #8 | 50°F | 39°F | 54°F | 12 | 4.9 | Busy season |
| November | 4.8 | #10 | 41°F | 32°F | 49°F | 11 | 3.8 | Moderate season |
| December | 4.4 | #12 | 33°F | 25°F | 44°F | 12 | 3.4 | Moderate season |
Near here
Nearby places in September
Nearby regions, nearest first. Distances are centre to centre, as the crow flies; they are not road distances or journey times.
Southern Norwayabout 90 miles
Balanced Overall 6.9 · Good weather, 63°F (17°C) · Low season · Cost expensive
InnlandetNorway · about 100 miles
Balanced Overall 6.5 · Good weather, 59°F (15°C) · Moderate season · Cost expensive
Western Norway & the fjordsNorway · about 130 miles
Balanced Overall 5.4 · Good weather, 60°F (16°C) · Moderate season · Cost expensive
Dalarna & North Middle Swedenabout 160 miles
Balanced Overall 7.6 · Very good weather, 62°F (17°C) · Low season · Cost moderate
Gothenburg & West Swedenabout 170 miles
Balanced Overall 7.3 · Very good weather, 64°F (18°C) · Low season · Cost pricey
Elsewhere in Europe
Better September weather than Oslo & around
Oslo & around's weather ranks 41 of 41 city regions this month. These city regions outside Norway have clearly better weather on your dates, nearest first, each compared with Oslo & around.
CopenhagenDenmark · about 320 miles
Very good weather (8.3): 4°F warmer afternoons
HamburgGermany · about 450 miles
Very good weather (8.6): 6°F warmer afternoons, cheaper
BremenGermany · about 480 miles
Very good weather (8.6): 6°F warmer afternoons, cheaper
BerlinGermany · about 540 miles
Very good weather (8.9): 8°F warmer afternoons, 2 fewer rain days, cheaper
Amsterdam & North HollandNetherlands · about 550 miles
Very good weather (8.3): 6°F warmer afternoons
How we knowSources, regional scope & scoring method Show detailsHide details
It's busy season, 71% of the busiest month and about average for the year.The figures cover the whole Oslo og Viken region, suburbs included. That means about 36,000 overnight visitors on a typical September night across the region, 67% of them from Norway itself. Rentals booked through Airbnb, Booking, Expedia and Tripadvisor add up to 4,400 more: 12 for every 100 counted above. Some are the same properties counted twice.
| Climate suitability (HCI:Urban, 0–100) | 70 |
| How our weather was checked | 56 open weather stations in this region, January and July: afternoon highs typically within 1°F (0.8°C), night lows within 1°F (0.3°C). |
| Tourist nights per 1,000 residents per day | 17 |
| Busiest month here | July · 24 |
| Visitors as share of people present | 1.7% |
| Rank among Europe's regions this month | 56th percentile |
| Domestic share of nights | 67% |
| Platform rental nights per 100 counted nights | 12 |
| Visitor share if every platform night were extra | 1.9% |
| Population used | 2.1 million |
| Statistical region | NO08 · Oslo og Viken |
Crowds: Eurostat nights spent at tourist accommodation, by month and NUTS 2 region, 2024–2025 average. Overnight visitors per night is the month's nights divided by its days; the per-1,000 figure is Eurostat's, against each year's population. Platform rentals: Eurostat nights booked via Airbnb, Booking, Expedia and Tripadvisor, 2024–2025 average, shown separately because some properties are in both counts. Weather: Holiday Climate Index computed from ERA5 reanalysis with daily highs, night lows and rain days corrected from open national weather-service station records, 2011–2025, population-weighted to the region; day-by-day figures are the same data averaged by date. Heat and rain odds are counted across those years. Sunrise and sunset: NOAA solar equations, local time. Prices: Eurostat price level index and HICP, national; the first figure is regional (Statistics Norway (SSB), table 14168: hotel accommodation revenue per occupied room). Full method · this region's data.