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.
The forecast for Fredrikstad and the places around it comes from the same weather models as the place pages. Radar: RainViewer, images from the last two hours.
30 days — Fredrikstad
14 real + 16 synthesised
Tue · Today Clear
+10°+3°0,9 mm
Wed · Tomorrow Showers
+10°+7°2,0 mm
Thursday 22/10 Light rain
+10°+10°14,0 mm
Friday 23/10 Showers
+11°+7°0,3 mm
Saturday 24/10 Showers
+11°+7°2,5 mm
Sunday 25/10 Showers
+9°+6°19,1 mm
Monday 26/10 Showers
+10°+8°5,4 mm
Tuesday 27/10 Showers
+10°+5°0,4 mm
Wednesday 28/10 Showers
+12°+10°12,3 mm
Thursday 29/10 Showers
+10°+8°11,9 mm
Friday 30/10 Clear
+9°+4°0,5 mm
Saturday 31/10 Drizzle
+6°+3°3,0 mm
Sunday 1/11 Partly cloudy
+8°+3°0,3 mm
Monday 2/11 Clear
+6°+2°12%
Tuesday 3/11 Rain (climate normal)
+3°-1°6,6 mm
Wednesday 4/11 Partly cloudy (climate normal)
+6°+1°20%
Thursday 5/11 Partly cloudy (climate normal)
+5°0°20%
Friday 6/11 Rain (climate normal)
+4°0°5,1 mm
Saturday 7/11 Partly cloudy (climate normal)
+3°-1°20%
Sunday 8/11 Partly cloudy (climate normal)
+1°-2°20%
Monday 9/11 Rain (climate normal)
0°-2°3,7 mm
Tuesday 10/11 Partly cloudy (climate normal)
+3°-1°20%
Wednesday 11/11 Partly cloudy (climate normal)
+5°0°20%
Thursday 12/11 Rain (climate normal)
+6°+1°3,9 mm
Friday 13/11 Partly cloudy (climate normal)
+4°0°20%
Saturday 14/11 Partly cloudy (climate normal)
+2°-2°20%
Sunday 15/11 Rain (climate normal)
0°-2°9,2 mm
Monday 16/11 Partly cloudy (climate normal)
0°-2°20%
Tuesday 17/11 Partly cloudy (climate normal)
+3°-1°20%
Wednesday 18/11 Rain (climate normal)
+6°+1°7,5 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.