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 — Plymouth
14 real + 16 synthesised
Thu · Today Sunny
21°12°0.4 mm
Fri · Tomorrow Sunny
21°12°4%
Saturday 1/8 Sunny
21°11°6%
Sunday 2/8 Sunny intervals
22°12°5%
Monday 3/8 Sunny
25°15°3%
Tuesday 4/8 Sunny intervals
23°15°6%
Wednesday 5/8 Sunny intervals
23°16°8%
Thursday 6/8 Sunny
23°16°0.7 mm
Friday 7/8 Showers
21°17°5.9 mm
Saturday 8/8 Showers
19°17°2.6 mm
Sunday 9/8 Showers
22°17°1.1 mm
Monday 10/8 Sunny
23°16°9%
Tuesday 11/8 Sunny
22°16°20%
Wednesday 12/8 Sunny
20°13°9%
Thursday 13/8 Rain (climate average)
32°22°7.5 mm
Friday 14/8 Sunny intervals (climate average)
33°22°20%
Saturday 15/8 Sunny intervals (climate average)
32°22°20%
Sunday 16/8 Rain (climate average)
32°22°5.5 mm
Monday 17/8 Sunny intervals (climate average)
31°21°20%
Tuesday 18/8 Sunny intervals (climate average)
28°19°20%
Wednesday 19/8 Rain (climate average)
29°20°8.6 mm
Thursday 20/8 Sunny intervals (climate average)
31°21°20%
Friday 21/8 Sunny intervals (climate average)
33°22°20%
Saturday 22/8 Rain (climate average)
32°22°8.8 mm
Sunday 23/8 Sunny intervals (climate average)
31°21°20%
Monday 24/8 Sunny intervals (climate average)
29°20°20%
Tuesday 25/8 Rain (climate average)
30°20°4.0 mm
Wednesday 26/8 Sunny intervals (climate average)
31°21°20%
Thursday 27/8 Sunny intervals (climate average)
32°22°20%
Friday 28/8 Rain (climate average)
34°23°5.5 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 Plymouth), 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