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