Days 1-14 are a real forecast from global weather models. Days 15-30 are season-typical values based on climate normals 1991-2020 (MET) — good for planning, NOT an exact forecast that far ahead.
30 days — Bergen
14 real + 16 synthesised
Sat · Today Showers
+14°+12°7,1 mm
Sun · Tomorrow Showers
+14°+11°5,8 mm
Monday 7/9 Showers
+15°+12°33,4 mm
Tuesday 8/9 Showers
+14°+10°21,4 mm
Wednesday 9/9 Cloudy
+15°+10°17%
Thursday 10/9 Showers
+13°+11°5,2 mm
Friday 11/9 Showers
+13°+10°0,8 mm
Saturday 12/9 Clear
+14°+10°8%
Sunday 13/9 Partly cloudy
+12°+11°0,1 mm
Monday 14/9 Cloudy
+14°+9°26%
Tuesday 15/9 Showers
+13°+12°6,5 mm
Wednesday 16/9 Showers
+13°+12°8,1 mm
Thursday 17/9 Clear
+13°+9°3,6 mm
Friday 18/9 Clear
+12°+6°8%
Saturday 19/9 Rain (climate normal)
+13°+8°18,9 mm
Sunday 20/9 Partly cloudy (climate normal)
+15°+9°20%
Monday 21/9 Partly cloudy (climate normal)
+17°+11°20%
Tuesday 22/9 Rain (climate normal)
+16°+10°33,0 mm
Wednesday 23/9 Partly cloudy (climate normal)
+12°+8°20%
Thursday 24/9 Partly cloudy (climate normal)
+11°+7°20%
Friday 25/9 Rain (climate normal)
+13°+8°30,2 mm
Saturday 26/9 Partly cloudy (climate normal)
+15°+10°20%
Sunday 27/9 Partly cloudy (climate normal)
+16°+10°20%
Monday 28/9 Rain (climate normal)
+18°+11°34,9 mm
Tuesday 29/9 Partly cloudy (climate normal)
+17°+11°20%
Wednesday 30/9 Partly cloudy (climate normal)
+12°+8°20%
Thursday 1/10 Rain (climate normal)
+8°+4°32,5 mm
Friday 2/10 Partly cloudy (climate normal)
+8°+4°20%
Saturday 3/10 Partly cloudy (climate normal)
+10°+5°20%
Sunday 4/10 Rain (climate normal)
+14°+8°33,4 mm
How does the long-range forecast work?
Days 1-14: Fetched live from global weather models (ECMWF, GFS) with statistical correction. Reliability about 85 % for days 1-3, about 60 % for days 7-10, about 45 % for days 11-14.
Days 15-30: A real forecast does not exist that far ahead (chaotic system). Instead we show season-typical values: the monthly average Tmax/Tmin from climate normals 1991-2020, with mild weekly variation.
Use: «About how warm is it usually in Oslo the last week of July?» — a good question for days 15-30. «Will it rain on 27 May?» — no serious forecast can answer that.