Cardiff · days 1-14 from weather models · days 15-30 typical range (1991-2020)
🗺️ 14-day forecast map
Cardiff & nearby cities — press play
Real forecast data for every city shown, from the same weather models as the city pages, updated several times a day. Icons show each day’s overall weather; the figure is the daytime maximum.
Next 14 days at a glance
From the model forecast
Warmest day
25°
Sun 20 Sep
Coldest night
8°
Fri 18 Sep
Days with rain
7 / 14
of 14 forecast days
Best day out
Sat 19 Sep
mild, dry & light wind
The next 4 weekends
For planning ahead
Sat 12 – Sun 13 Sep
21° 11°
75% rain risk
Sat 19 – Sun 20 Sep
25° 11°
22% rain risk
Sat 26 – Sun 27 Sep
25° 15°
typical range
Sat 3 – Sun 4 Oct
20° 11°
typical range
30 days — Cardiff
14 real + 16 synthesised
Sat · Today Sunny intervals
20°11°0.2 mm⌄
Wind18 mph W
Gusts30 mph
UV index3 – Moderate
Chance of rain37%
Sunrise06:43
Sunset19:34
Sun · Tomorrow Cloudy
21°15°2.6 mm⌄
Wind16 mph W
Gusts29 mph
UV index4 – Moderate
Chance of rain75%
Sunrise06:44
Sunset19:32
Monday 14/9 Sunny
23°15°0.7 mm⌄
Wind17 mph W
Gusts24 mph
UV index4 – Moderate
Chance of rain57%
Sunrise06:46
Sunset19:30
Tuesday 15/9 Sunny
19°12°17%⌄
Wind16 mph W
Gusts26 mph
UV index5 – Moderate
Chance of rain17%
Sunrise06:47
Sunset19:27
Wednesday 16/9 Showers
17°10°0.5 mm⌄
Wind15 mph W
Gusts21 mph
UV index4 – Moderate
Chance of rain44%
Sunrise06:49
Sunset19:25
Thursday 17/9 Showers
17°10°2.9 mm⌄
Wind17 mph W
Gusts29 mph
UV index4 – Moderate
Chance of rain74%
Sunrise06:51
Sunset19:23
Friday 18/9 Sunny
18°8°9%⌄
Wind12 mph W
Gusts16 mph
UV index5 – Moderate
Chance of rain9%
Sunrise06:52
Sunset19:21
Saturday 19/9 Sunny
21°14°22%⌄
Wind6 mph SE
Gusts13 mph
UV index6 – High
Chance of rain22%
Sunrise06:54
Sunset19:18
Sunday 20/9 Sunny
25°11°4%⌄
Wind12 mph SE
Gusts17 mph
UV index6 – High
Chance of rain4%
Sunrise06:55
Sunset19:16
Monday 21/9 Sunny
23°13°1.3 mm⌄
Wind10 mph SW
Gusts14 mph
UV index6 – High
Chance of rain57%
Sunrise06:57
Sunset19:14
Tuesday 22/9 Sunny
17°11°5.3 mm⌄
Wind16 mph W
Gusts22 mph
UV index5 – Moderate
Chance of rain77%
Sunrise06:59
Sunset19:11
Wednesday 23/9 Showers
17°11°11.8 mm⌄
Wind23 mph S
Gusts37 mph
UV index4 – Moderate
Chance of rain90%
Sunrise07:00
Sunset19:09
Thursday 24/9 Showers
18°12°5.8 mm⌄
Wind21 mph SW
Gusts31 mph
UV index5 – Moderate
Chance of rain78%
Sunrise07:02
Sunset19:07
Friday 25/9 Showers
17°9°7.0 mm⌄
Wind19 mph S
Gusts32 mph
UV index4 – Moderate
Chance of rain82%
Sunrise07:03
Sunset19:04
Saturday 26/9 Rain (climate average)
24°15°3.7 mm⌄
Day≈21–27°
Night≈12–18°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Sunday 27/9 Sunny intervals (climate average)
25°16°20%⌄
Day≈22–28°
Night≈13–19°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Monday 28/9 Sunny intervals (climate average)
29°18°20%⌄
Day≈26–32°
Night≈15–21°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climate average)
27°17°4.4 mm⌄
Day≈24–30°
Night≈14–20°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Wednesday 30/9 Sunny intervals (climate average)
24°15°20%⌄
Day≈21–27°
Night≈12–18°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Thursday 1/10 Sunny intervals (climate average)
17°11°20%⌄
Day≈14–20°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climate average)
17°11°6.0 mm⌄
Day≈14–20°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Saturday 3/10 Sunny intervals (climate average)
17°11°20%⌄
Day≈14–20°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Sunday 4/10 Sunny intervals (climate average)
20°13°20%⌄
Day≈17–23°
Night≈10–16°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Monday 5/10 Rain (climate average)
22°14°2.8 mm⌄
Day≈19–25°
Night≈11–17°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Tuesday 6/10 Sunny intervals (climate average)
19°12°20%⌄
Day≈16–22°
Night≈9–15°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Wednesday 7/10 Sunny intervals (climate average)
17°11°20%⌄
Day≈14–20°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Thursday 8/10 Rain (climate average)
17°10°3.2 mm⌄
Day≈14–20°
Night≈7–13°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Friday 9/10 Sunny intervals (climate average)
18°11°20%⌄
Day≈15–21°
Night≈8–14°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Saturday 10/10 Sunny intervals (climate average)
19°12°20%⌄
Day≈16–22°
Night≈9–15°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Sunday 11/10 Rain (climate average)
21°13°5.2 mm⌄
Day≈18–24°
Night≈10–16°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
How does the long-range forecast work?
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.
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 Cardiff), 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