Days 1-14 are a real forecast from weather models. Days 15-30 are season-typical values based on 1991-2020 climate averages — good for planning, NOT an exact forecast that far ahead.
30 days — Sunderland
14 real + 16 synthesised
Wed · Today Sunny intervals
23°17°0.3 mm
Thu · Tomorrow Sunny
21°14°7%
Friday 31/7 Sunny
19°10°6%
Saturday 1/8 Sunny intervals
20°12°6%
Sunday 2/8 Sunny
19°11°7%
Monday 3/8 Sunny intervals
15°13°7.1 mm
Tuesday 4/8 Showers
15°12°15.3 mm
Wednesday 5/8 Sunny intervals
16°13°17%
Thursday 6/8 Sunny intervals
17°12°8%
Friday 7/8 Sunny intervals
18°14°10%
Saturday 8/8 Sunny intervals
20°13°7%
Sunday 9/8 Sunny intervals
18°14°11%
Monday 10/8 Cloudy
21°16°7%
Tuesday 11/8 Sunny
22°16°5%
Wednesday 12/8 Rain (climate average)
25°16°4.6 mm
Thursday 13/8 Sunny intervals (climate average)
28°17°20%
Friday 14/8 Sunny intervals (climate average)
30°19°20%
Saturday 15/8 Rain (climate average)
28°17°5.7 mm
Sunday 16/8 Sunny intervals (climate average)
24°15°20%
Monday 17/8 Sunny intervals (climate average)
23°15°20%
Tuesday 18/8 Rain (climate average)
23°15°3.5 mm
Wednesday 19/8 Sunny intervals (climate average)
28°17°20%
Thursday 20/8 Sunny intervals (climate average)
29°18°20%
Friday 21/8 Rain (climate average)
29°18°5.5 mm
Saturday 22/8 Sunny intervals (climate average)
29°18°20%
Sunday 23/8 Sunny intervals (climate average)
27°17°20%
Monday 24/8 Rain (climate average)
25°16°3.5 mm
Tuesday 25/8 Sunny intervals (climate average)
25°15°20%
Wednesday 26/8 Sunny intervals (climate average)
27°17°20%
Thursday 27/8 Rain (climate average)
27°17°7.0 mm
How does the long-range forecast work?
Days 1-14: Fetched live from weather models (UKV, 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 max/min from 1991-2020 climate data (London baseline with latitude correction for Sunderland), with mild weekly variation.
Use: "Roughly how warm is it usually in London in the last week of July?" — a good question for days 15-30. "Will it rain on 27 May?" — no serious forecast can say.
Forecasts from the UK Met Office UKV model, global weather models and official UK environmental data · Met Office UKV model · Environment Agency · Copernicus CAMS · NOAA