May
Wk 19–21
Best balance of weather comfort and space: crowd level around 33 out of 100, weather comfort near 54.
- Crowd level
- 32–33
- Comfort
- 48–59
Photo by Stock Birken on Unsplash
Norway
Best time to visit Oslo og Viken
When is it busiest here, and when is it quietest? The answer runs week by week through the region's own year, from official EU overnight-stay statistics.
Busiest week
JulyCrowd level 100
Wk 30 · 367,298 overnight stays
Quietest weeks
JanuaryCrowd level 0–1
Wk 2–4 · measured against the region's own year, not against other regions
Sweet spot
MayCrowd level 32–33
Wk 19–21 · a good balance of weather comfort and crowd level
Warmest month
18 °CComfort 61
July · around 195 mm of rain in the month
Crowding Index 1.1 · As of 06/08/2026 · Crowding score 0–100, season-relative
Oslo og Viken (Norway) is quietest in January: across Wk 2–4 the crowd level runs from 0 to 1 out of 100. The busiest single week falls in July (Wk 30), at 100 out of 100 with roughly 367,298 overnight stays. Calculated from open official data; the values are modelled, not counted.
When is Oslo og Viken busy, when is it quiet?
Click a week. The panel on the right explains why it is busy or quiet.
Weather profile
Weather comfort is an absolute scale (0 = poor, 100 = ideal) and a second axis next to the season-relative crowd level.
JanuaryØ 4
FebruaryØ 19
MarchØ 25
AprilØ 22
MayØ 36
JuneØ 63
JulyØ 89
AugustØ 77
SeptemberØ 43
OctoberØ 31
NovemberØ 24
DecemberØ 13
Colour = season-relative crowd levelBar = weather comfort (Sun & warmth), absolute 0–100
Why this week?
May · Wk 19
Crowd level32/100 · fairly quiet
quietbusy
Weather comfort11/100 · Sun & warmth
-4 % versus the region's annual average.
- Contributing months
- May (100 %)
- Overnight stays/week
- 213,512
- School-holiday pressure (source markets)
- 2 % of source markets on school holidays · -1 % crowding from holidays
- Main source markets
- Germany (35 %) · Netherlands (14 %) · United Kingdom (11 %) · 18% of guests modelled
- Region range
- 140,201–367,298 (avg 223,502)
- Base years
- 2022, 2023, 2024, 2025 (excluding 2020, 2021)
v1: Crowd-Score aus der Eurostat-Basisschicht (Übernachtungen), moduliert vom Schulferien-Druck der Quellmärkte, region-spezifisch gewichtet mit dem Quellland-Mix. Season-relativ zur Region. Event-Schichten folgen.
Plan your trip
Pre-filled with the next date in week 19.
DestinationOslo og Viken
Travel datesPick a week in the calendar
FlightSearch flights (opens in a new tab)
StayFind stays (opens in a new tab)
ActivityExplore activities (opens in a new tab)Ad · commission link
Photos: Johny Goerend · reisetopia · Dino Reichmuth on Unsplash
The travel year in Oslo og Viken, month by month
The year as a table to read and to cite: crowd level for every month, plus weather comfort and temperature from the climate normals.
| Month | Crowd level0–100, season-relative | Weather comfort0–100, profile “mild” | Avg temperature |
|---|---|---|---|
| January | 4 | 2 | -6 °C |
| February | 19 | 4 | -3 °C |
| March | 25 | 10 | 1 °C |
| April | 22 | 25 | 6 °C |
| May | 36 | 53 | 12 °C |
| June | 63 | 65 | 17 °C |
| July | 89 | 61 | 18 °C |
| August | 77 | 57 | 17 °C |
| September | 43 | 44 | 12 °C |
| October | 31 | 25 | 6 °C |
| November | 24 | 10 | 0 °C |
| December | 13 | 3 | -4 °C |
The crowd level is season-relative: 100 is the annual peak of Oslo og Viken itself, not the busiest destination in Europe. The figures say when it is quiet here — not where it is quieter than elsewhere.
Weather comfort 0–100 from the climate normals, profile “mild” – the same profile as the recommendation above, not the selection in the calendar. A “–” means the data for that month is missing.
Index 1.1 · As of 06/08/2026
The windows worth catching
Three windows from the model, weighing crowd level against weather comfort.
September
Wk 36–38
A quieter choice in the other half of the year: crowd level around 44, weather comfort near 46.
- Crowd level
- 41–49
- Comfort
- 42–50
July–August
Wk 29–31
The region's peak: crowd level around 94 out of 100. Only if the dates are fixed.
- Crowd level
- 90–100
- Comfort
- 59–60
Oslo og Viken compared with Europe
How dense it gets here measured against Europe — on the one figure that lets two destinations be compared.
- Crowd density in Oslo og Viken
- 8.93
- European median
- 11.80
overnight stays per km² and week
overnight stays per km² and week
Furthest from the median: August, at 0.6× the value. Closest to the median: December, at 1.0× the value.
Mean across 12 months, weighted by their weeks. This density compares destinations with each other. The crowd level in the table above compares Oslo og Viken with itself. The two figures are never combined.
Index 1.1 · As of 06/08/2026
Climate through the year
Average temperature with day/night range and precipitation across the twelve months.
- Avg temperature
- Day/night range
- Precipitation
| Month | Avg temperature (°C) | Day avg (°C) | Night avg (°C) | Precipitation (mm) |
|---|---|---|---|---|
| Jan | -6 | -6 | -6 | 105 |
| Feb | -4 | -3 | -5 | 59 |
| Mar | -1 | 1 | -2 | 69 |
| Apr | 4 | 6 | 2 | 77 |
| May | 10 | 12 | 8 | 55 |
| Jun | 15 | 17 | 13 | 110 |
| Jul | 17 | 18 | 15 | 195 |
| Aug | 15 | 17 | 14 | 179 |
| Sep | 11 | 12 | 10 | 153 |
| Oct | 5 | 6 | 5 | 108 |
| Nov | 0 | 0 | 0 | 73 |
| Dec | -4 | -4 | -4 | 80 |
The band shows mean daytime to nighttime temperature. Precipitation shown as monthly total (mm). Typical monthly value (climate normal), not a forecast.
How sunny?
Average daily solar energy across the twelve months. The higher the value, the sunnier.
2.7 kWh/m²/Tag
Annual average
Jun
Sunniest month
| Month | Solar irradiance (kWh/m²/day) |
|---|---|
| Jan | 0.4 |
| Feb | 1.1 |
| Mar | 2.5 |
| Apr | 4.2 |
| May | 5.3 |
| Jun | 5.7 |
| Jul | 5.1 |
| Aug | 3.8 |
| Sep | 2.3 |
| Oct | 1.1 |
| Nov | 0.4 |
| Dec | 0.2 |
Mean daily solar irradiance in kWh/m²/day (≈ peak-sun-hours equivalent). Typical monthly value (climate normal), not a forecast. Generated using Copernicus Climate Change Service information 2025.
Directly reachable from
Destination airports of Oslo og Viken and every European departure airport with a direct connection to them.
Destination airports
Select a destination airport to see the direct departure airports.
“Directly reachable” means a direct connection exists according to our sources. We do not show a live timetable. Availability and flight days can vary by season and airline.
Data sources: direct connections from Wikipedia (“Airlines and destinations”, licensed CC BY-SA 4.0, aggregated and modified by us), cross-checked with Eurostat, Destatis and the UK Civil Aviation Authority; airport data from OurAirports (Public Domain). The derived connection data is licensed under CC BY-SA 4.0.
Data as of: August 2026
Ski areas in Oslo og Viken
Mapped ski areas in this region with slope kilometres, lifts and elevation, plus the long-term snow average from our climate data.
- Ski areas
- 46
- Slopes in total
- 247 km
- Lifts
- 168
- Highest point
- 1,298 m
On a long-term average, February sees the most snow: 90 cm mean snow depth across the region. In 7 months of the year the regional average reaches at least 10 cm of snow depth.
| Ski area | Slopes | Lifts | Elevation |
|---|---|---|---|
| Ski Geilo | 34.85 km0.93 km cross-country | 18 | 779–1,163 m384 m vertical drop |
| Hemsedal skisenter | 31.17 km | 10 | 642–721 m79 m vertical drop |
| Norefjell | 18.24 km | 10 | 192–1,161 m969 m vertical drop |
| Uvdal alpinsenter (Senteret) | 17.64 km | 7 | 691–1,209 m518 m vertical drop |
| Hemsedal | 16.84 km | 13 | 643–1,298 m655 m vertical drop |
| Nesfjellet Alpinsenter | 14.6 km701.24 km cross-country | 8 | 735–1,093 m359 m vertical drop |
| Geilo | 13.47 km0.92 km cross-country | 9 | 779–1,065 m286 m vertical drop |
| Ål skisenter | 12.82 km | 5 | 567–1,037 m470 m vertical drop |
| Skimore Oslo | 11.34 km | 11 | 153–530 m377 m vertical drop |
| Skagahøgdi skisenter | 10.08 km | 2 | 439–873 m434 m vertical drop |
| Kongsberg | 9.68 km40.91 km cross-country | 9 | 241–567 m326 m vertical drop |
| Hallingskarvet skisenter | 7.72 km | 3 | 741–1,225 m485 m vertical drop |
| Norefjell | 7.42 km | 5 | 194–995 m801 m vertical drop |
| Storefjell Resort | 6.98 km | 5 | 946–1,147 m201 m vertical drop |
| Hurdal Skisenter | 4.81 km | 4 | 302–523 m221 m vertical drop |
| Turufjell Skisenter | 4.61 km | 3 | 672–812 m140 m vertical drop |
| Solheisen | 3.93 km | 2 | 730–1,050 m321 m vertical drop |
| Oslo Skisenter | 3.15 km | 4 | 213–370 m157 m vertical drop |
| Kjerringåsen | 2.35 km | 2 | 83–209 m126 m vertical drop |
| Høgevarde | 2.33 km223.39 km cross-country | 4 | 799–997 m198 m vertical drop |
| Vegglifjell | 2.29 km | 1 | 966–1,112 m145 m vertical drop |
| Skarslia Ski- og Akesenter | 2.16 km | 2 | 894–1,072 m178 m vertical drop |
| Hurdal Skisenter | 1.43 km | 1 | 321–523 m203 m vertical drop |
| SNØ Oslo | 1.34 km | 3 | 168–241 m73 m vertical drop |
| Nannestad Skisenter | 1.16 km | 1 | 208–352 m144 m vertical drop |
and 21 more areas in this region
Slope, lift and elevation figures come from open mapping and are complete to varying degrees. “Not available” means not mapped, not “does not exist”. Opening hours and season are not included. Snow figures are long-term averages for the whole region, not snow depth on the mountain and not a forecast.
Data sources: ski areas from OpenSkiMap, based on OpenStreetMap, licensed under ODbL 1.0; snow depths from ERA5-Land (Copernicus Climate Change Service).
Frequently asked questions about the best time to visit Oslo og Viken
Short answers on timing, weather and getting there, all from the data on this page.
When is the best time to visit Oslo og Viken?
- The best time to visit Oslo og Viken is May (Wk 19–21): in this window the crowd level is low at around 33 out of 100 and weather comfort is good at about 54 out of 100.
When is Oslo og Viken quietest?
- January (Wk 2–4) is the quietest time in Oslo og Viken. Crowd levels there sit at 0–1 out of 100, the lowest across the year.
When is Oslo og Viken busiest?
- Oslo og Viken is busiest in July (Wk 30) with around 367,298 overnight stays in the peak week.
What is the weather like in Oslo og Viken and when is it warmest?
- It is warmest in Oslo og Viken in July with an average of 18 °C and around 195 mm of rain in the month.
When is there the most snow in Oslo og Viken and when are ski conditions best?
- Oslo og Viken has the most snow in February with an average of around 90 cm. Those are the most reliable weeks for winter sports.
When is Oslo og Viken least busy while still having good snow?
- The best time for quiet winter sports in Oslo og Viken is January: with still around 82 cm of snow, the crowd level of about 4 out of 100 is below peak season.
How do you get to Oslo og Viken?
- Oslo og Viken is reachable via the destination airport Oslo Airport Gardermoen (OSL) with direct flights.
All figures are approximations derived from open data (crowd level from Eurostat overnight stays, climate from Copernicus/ERA5-Land), not measurements.
Quiet travel windows across Europe, once a month
The Crowd Report names the emptiest weeks of the coming months — for every region, not just this one. Free, unsubscribe any time.
Back to the map
v1 approximation, calculated from Eurostat overnight stays. Day tourism and cruises (Venice, Dubrovnik …) are still missing, so we show these destinations as quieter than they are. The crowd score is a model-based forecast, not a measurement.