Belfast · days 1-14 from weather models · days 15-30 typical range (1991-2020)
🗺️ 14-day forecast map
Belfast & 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
21°
Mon 14 Sep
Coldest night
6°
Fri 25 Sep
Days with rain
8 / 14
of 14 forecast days
Best day out
Sun 20 Sep
mild, dry & light wind
The next 4 weekends
For planning ahead
Sat 12 – Sun 13 Sep
19° 11°
92% rain risk
Sat 19 – Sun 20 Sep
20° 10°
15% rain risk
Sat 26 – Sun 27 Sep
25° 13°
typical range
Sat 3 – Sun 4 Oct
17° 8°
typical range
30 days — Belfast
14 real + 16 synthesised
Sat · Today Showers
19°11°24.6 mm⌄
Wind16 mph W
Gusts37 mph
UV index3 – Moderate
Chance of rain92%
Sunrise06:51
Sunset19:48
Sun · Tomorrow Sunny intervals
19°11°35%⌄
Wind7 mph SW
Gusts20 mph
UV index3 – Moderate
Chance of rain35%
Sunrise06:53
Sunset19:46
Monday 14/9 Cloudy
21°14°15.0 mm⌄
Wind15 mph SW
Gusts26 mph
UV index3 – Low
Chance of rain91%
Sunrise06:54
Sunset19:43
Tuesday 15/9 Showers
16°11°2.7 mm⌄
Wind21 mph SW
Gusts33 mph
UV index4 – Moderate
Chance of rain75%
Sunrise06:56
Sunset19:41
Wednesday 16/9 Showers
15°9°0.5 mm⌄
Wind16 mph NW
Gusts27 mph
UV index4 – Moderate
Chance of rain52%
Sunrise06:58
Sunset19:38
Thursday 17/9 Showers
15°9°3.0 mm⌄
Wind17 mph W
Gusts30 mph
UV index3 – Moderate
Chance of rain77%
Sunrise07:00
Sunset19:36
Friday 18/9 Cloudy
16°8°26%⌄
Wind15 mph SW
Gusts30 mph
UV index4 – Moderate
Chance of rain26%
Sunrise07:02
Sunset19:33
Saturday 19/9 Sunny
19°10°15%⌄
Wind11 mph S
Gusts26 mph
UV index5 – Moderate
Chance of rain15%
Sunrise07:04
Sunset19:30
Sunday 20/9 Sunny
20°13°15%⌄
Wind13 mph SE
Gusts23 mph
UV index5 – Moderate
Chance of rain15%
Sunrise07:05
Sunset19:28
Monday 21/9 Fog
19°12°0.5 mm⌄
Wind12 mph SE
Gusts22 mph
UV index4 – Moderate
Chance of rain53%
Sunrise07:07
Sunset19:25
Tuesday 22/9 Showers
14°8°7.7 mm⌄
Wind22 mph W
Gusts34 mph
UV index3 – Moderate
Chance of rain90%
Sunrise07:09
Sunset19:23
Wednesday 23/9 Showers
15°7°1.8 mm⌄
Wind20 mph SE
Gusts42 mph
UV index4 – Moderate
Chance of rain73%
Sunrise07:11
Sunset19:20
Thursday 24/9 Showers
16°10°1.3 mm⌄
Wind19 mph S
Gusts35 mph
UV index5 – Moderate
Chance of rain57%
Sunrise07:13
Sunset19:18
Friday 25/9 Sunny intervals
15°6°5.1 mm⌄
Wind14 mph SW
Gusts28 mph
UV index4 – Moderate
Chance of rain76%
Sunrise07:15
Sunset19:15
Saturday 26/9 Rain (climate average)
22°13°5.1 mm⌄
Day≈19–25°
Night≈10–16°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Sunday 27/9 Sunny intervals (climate average)
25°14°20%⌄
Day≈22–28°
Night≈11–17°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Monday 28/9 Sunny intervals (climate average)
23°14°20%⌄
Day≈20–26°
Night≈11–17°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climate average)
23°13°6.4 mm⌄
Day≈20–26°
Night≈10–16°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Wednesday 30/9 Sunny intervals (climate average)
21°12°20%⌄
Day≈18–24°
Night≈9–15°
Rain≈55 mm / September
(climate average)Typical range for these dates · 1991–2020
Thursday 1/10 Sunny intervals (climate average)
14°8°20%⌄
Day≈11–17°
Night≈5–11°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climate average)
15°8°4.8 mm⌄
Day≈12–18°
Night≈5–11°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Saturday 3/10 Sunny intervals (climate average)
14°8°20%⌄
Day≈11–17°
Night≈5–11°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Sunday 4/10 Sunny intervals (climate average)
17°10°20%⌄
Day≈14–20°
Night≈7–13°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Monday 5/10 Rain (climate average)
17°10°3.3 mm⌄
Day≈14–20°
Night≈7–13°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Tuesday 6/10 Sunny intervals (climate average)
16°9°20%⌄
Day≈13–19°
Night≈6–12°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Wednesday 7/10 Sunny intervals (climate average)
13°7°20%⌄
Day≈10–16°
Night≈4–10°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Thursday 8/10 Rain (climate average)
14°8°5.3 mm⌄
Day≈11–17°
Night≈5–11°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Friday 9/10 Sunny intervals (climate average)
13°7°20%⌄
Day≈10–16°
Night≈4–10°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Saturday 10/10 Sunny intervals (climate average)
16°9°20%⌄
Day≈13–19°
Night≈6–12°
Rain≈50 mm / October
(climate average)Typical range for these dates · 1991–2020
Sunday 11/10 Rain (climate average)
19°10°6.7 mm⌄
Day≈16–22°
Night≈7–13°
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 Belfast), 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