Alnsjøen Lake

Reservoir lake in Oslo supplying municipal water

Lake on Oslo's outskirts used for walking, cross-country skiing in winter and local fishing; it serves as an accessible green space for day trips from the city.

Main image

Alnsjøen at a Glance#

Address: Alnsjøen, Oslo Municipality, Norway

How to Get to Alnsjøen#

From Oslo city center, take local buses toward the Alna/Grorud areas and follow signs to the lake; cycling routes also connect directly from the capital. Exact bus lines vary by stop; check Ruter schedules.

Tips for Visiting Alnsjøen#

  • Use the marked trails for the best shoreline views and to protect sensitive areas.
  • If visiting in winter, check local ice safety notices before attempting to skate or walk on the lake.
  • Birdwatchers should bring binoculars - the lake attracts species during migration windows.

Best Time to Visit Alnsjøen#

Summer for hiking and water access; winter offers a stark, snowy landscape for experienced outdoorspeople.

Summer
June-August · 12-22°C
Pleasant for walking, picnics, and water activities; local trails are busiest then.
Winter
December-February · -10-0°C
Frozen scenes and cross‑country skiing in nearby terrain; check ice safety.

Weather & Climate near Alnsjøen#

Climate

Alnsjøen's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -7°C to 21°C. Moderate rainfall (928 mm/year).

Air Quality: AQI 28 Good
Best Time to Visit
JuneJulyMay
Temperature & Rainfall
Temperature Range
31°
Warmest Month
-31°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor -7° - -2° -9° 65 mm overcast 98% 3.4 m/s 0.0 low 6.7h
February Poor -7° - -1° -9° 45 mm overcast 98% 3.3 m/s 0.1 low 9.0h
March Poor -4° - 3° -5° 64 mm overcast 93% 3.4 m/s 0.3 low 11.6h
April Acceptable -1° - 8° 1° 53 mm partly cloudy 83% 3.3 m/s 0.6 moderate 14.3h
May Good 5° - 15° 8° 55 mm partly cloudy 79% 3.5 m/s 1.0 high 16.8h
June Good 9° - 19° 14° 82 mm partly cloudy 78% 3.4 m/s 1.4 high 18.2h
July Good 11° - 21° 16° 90 mm overcast 81% 3.2 m/s 1.3 high 17.5h
August Good 10° - 19° 15° 94 mm overcast 84% 3.1 m/s 0.9 moderate 15.3h
September Acceptable 6° - 14° 8° 101 mm overcast 87% 3.5 m/s 0.5 low 12.6h
October Poor 2° - 8° 2° 108 mm overcast 93% 3.4 m/s 0.1 low 10.0h
November Poor -2° - 3° -4° 100 mm overcast 96% 3.3 m/s 0.0 low 7.4h
December Poor -6° - -1° -8° 71 mm overcast 97% 3.3 m/s 0.0 low 5.9h

Nearby Attractions to Alnsjøen#