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 — Uddevalla
14 real + 16 synthesised
Fri · Today Clear
+19°+13°7%
Sat · Tomorrow Clear
+18°+12°4%
Sunday 2/8 Clear
+18°+13°2,6 mm
Monday 3/8 Clear
+19°+12°4%
Tuesday 4/8 Partly cloudy
+22°+10°5%
Wednesday 5/8 Clear
+22°+9°5%
Thursday 6/8 Clear
+21°+10°6%
Friday 7/8 Partly cloudy
+22°+10°8,2 mm
Saturday 8/8 Showers
+17°+11°2,2 mm
Sunday 9/8 Partly cloudy
+20°+9°10%
Monday 10/8 Partly cloudy
+18°+9°6%
Tuesday 11/8 Clear
+20°+8°8%
Wednesday 12/8 Partly cloudy
+22°+11°10%
Thursday 13/8 Clear
+23°+15°8%
Friday 14/8 Rain (climate normal)
+24°+14°8,4 mm
Saturday 15/8 Partly cloudy (climate normal)
+25°+14°20%
Sunday 16/8 Partly cloudy (climate normal)
+27°+15°20%
Monday 17/8 Rain (climate normal)
+24°+14°7,3 mm
Tuesday 18/8 Partly cloudy (climate normal)
+23°+13°20%
Wednesday 19/8 Partly cloudy (climate normal)
+19°+11°20%
Thursday 20/8 Rain (climate normal)
+22°+13°6,2 mm
Friday 21/8 Partly cloudy (climate normal)
+23°+13°20%
Saturday 22/8 Partly cloudy (climate normal)
+24°+14°20%
Sunday 23/8 Rain (climate normal)
+24°+14°4,4 mm
Monday 24/8 Partly cloudy (climate normal)
+25°+14°20%
Tuesday 25/8 Partly cloudy (climate normal)
+21°+12°20%
Wednesday 26/8 Rain (climate normal)
+19°+11°7,3 mm
Thursday 27/8 Partly cloudy (climate normal)
+22°+12°20%
Friday 28/8 Partly cloudy (climate normal)
+24°+14°20%
Saturday 29/8 Rain (climate normal)
+24°+14°6,8 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 (Stockholm baseline with latitude correction for Uddevalla), 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.