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