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 — Drammen
14 real + 16 synthesised
Mon · Today Clear
+22°+6°3%
Tue · Tomorrow Clear
+21°+8°1,6 mm
Wednesday 5/8 Fog
+23°+12°2,1 mm
Thursday 6/8 Showers
+23°+11°18,7 mm
Friday 7/8 Clear
+22°+10°1,1 mm
Saturday 8/8 Partly cloudy
+21°+10°2,4 mm
Sunday 9/8 Showers
+21°+10°0,4 mm
Monday 10/8 Partly cloudy
+22°+10°6%
Tuesday 11/8 Clear
+21°+8°7%
Wednesday 12/8 Cloudy
+18°+10°2,9 mm
Thursday 13/8 Showers
+14°+12°17,3 mm
Friday 14/8 Fog
+17°+10°1,3 mm
Saturday 15/8 Partly cloudy
+20°+9°1,3 mm
Sunday 16/8 Partly cloudy
+22°+8°11%
Monday 17/8 Rain (climate normal)
+21°+12°11,9 mm
Tuesday 18/8 Partly cloudy (climate normal)
+24°+13°20%
Wednesday 19/8 Partly cloudy (climate normal)
+22°+12°20%
Thursday 20/8 Rain (climate normal)
+20°+11°9,8 mm
Friday 21/8 Partly cloudy (climate normal)
+18°+10°20%
Saturday 22/8 Partly cloudy (climate normal)
+17°+9°20%
Sunday 23/8 Rain (climate normal)
+20°+11°11,6 mm
Monday 24/8 Partly cloudy (climate normal)
+19°+11°20%
Tuesday 25/8 Partly cloudy (climate normal)
+22°+12°20%
Wednesday 26/8 Rain (climate normal)
+24°+14°9,2 mm
Thursday 27/8 Partly cloudy (climate normal)
+20°+11°20%
Friday 28/8 Partly cloudy (climate normal)
+20°+11°20%
Saturday 29/8 Rain (climate normal)
+18°+10°6,8 mm
Sunday 30/8 Partly cloudy (climate normal)
+17°+9°20%
Monday 31/8 Partly cloudy (climate normal)
+19°+11°20%
Tuesday 1/9 Rain (climate normal)
+17°+8°10,2 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.