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