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CheckWeather UKLlantwit Major
Forecast confidence: High · models disagree by 1°C

Llantwit Major weather

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Light drizzle,rain likely tomorrow

Met Office, the European and the American model agree on a high near 17° in Llantwit Major today. Tomorrow looks drizzle around 18°, with a 100% chance of rain.

17°12°
18°15°
18°13°
19°13°
20°14°
20°12°
Todaymodels agreeTomorrowmodels agreeSundaymodels agreeMondaysplit ±3°Tuesdaysplit ±4°Wednesdaysplit ±5°
Met OfficeUKMO model
17°
Overcast
Feels 15° · Wind 15 mph · Humidity 76%
EuropeanECMWF
16°
Overcast
Feels 14° · Wind 15 mph · Humidity 87%
AmericanNOAA GFS
16°
Overcast
Feels 13° · Wind 18 mph · Humidity 84%

Latest for Llantwit Major: Met Office (UKMO model): 17° Overcast · European (ECMWF): 16° Overcast · American (NOAA GFS): 16° Overcast.

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Llantwit Major weather warnings

Met Office yellow, amber and red warnings for Wales

Checking the Met Office for warnings in force for Wales…

Llantwit Major weather in numbers

measured normals and 10 years of recorded weather

Llantwit Major swings 16°C across the year, from 19°C highs in June to 3°C lows in January, and March is usually the wettest month in a year that brings about 1488 mm of precipitation. Over 10 years of recorded weather it averages 5 days a year at 25°C or above, 14 frost nights, and rain on 177 days.

Warmest month
June
19°C average high
Coldest month
January
3°C average low
Wettest month
March
1488 mm a year
Comfortable
4 months
May, June, July and August
Residents
14,000
share this forecast
Most accurate here
European
91/100 CheckWeather Score
Warm days
5 days
a year at 25°C or above
Frost nights
14 nights
a year below 0°C
Rain days
177 days
a year with 1 mm or more

Day counts are from the ERA5 reanalysis for Llantwit Major’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.

The weather map: all three models at once

Met Office, European, American side by side around Llantwit Major and nearby towns.Live rain radar →
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Llantwit Major hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Llantwit Major 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Light drizzle
17° 12°
models agree
Tomorrow
Drizzle
18° 15°
models agree
Sun
Cloudy
18° 13°
models agree
Mon
Light drizzle
19° 13°
±3°
Tue
Light drizzle
20° 14°
±4°
Wed
Light drizzle
20° 12°
±5°
Thu
Cloudy
20° 11°
±6°
Fri
Light drizzle
22° 13°
±7°
Sat
Drizzle
18° 13°
±2°
Sun
Light drizzle
17° 10°
models agree
Mon
Partly cloudy
18° 11°
models agree
Tue
Cloudy
20° 11°
±3°
Wed
Light drizzle
17° 13°
models agree
Thu
Cloudy
16° 10°
models agree

Llantwit Major, Wales is at its warmest in Jun (average highs near 19°C) and coldest in Jan (lows around 3°C), with roughly 1488 mm of precipitation across the year. Below, compare what Met Office, European, American forecast for Llantwit Major right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United Kingdom before you trust any single number.

Llantwit Major climate by month

average daytime high and overnight low across a typical year
Jan
Feb
10°
Mar
10°
Apr
12°
May
16°
10°
Jun
19°
12°
Jul
18°
14°
Aug
19°
14°
Sep
19°
13°
Oct
15°
11°
Nov
11°
Dec
10°

Which forecast is most accurate in Llantwit Major?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
91
/100rank #1
91±0.5°C93±2.2 mph8994% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
Met Office logo
Met Office
87
/100rank #2
92±0.5°C95±1.4 mph7687% hitMet Office (United Kingdom)Exeter, United Kingdom
American logo
American
79
/100rank #3
81±1.0°C94±1.7 mph6581% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1887 cities. Lower error means a higher score. See which forecast model is most accurate in United Kingdom, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United Kingdom? Give each 1 to 5 stars.

Met OfficeUKMO model
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EuropeanECMWF
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AmericanNOAA GFS
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°16° to 17°±74%23% to 97% chance
Tomorrowmodels agree18° to 19°±22%78% to 100% chance
Sun±1°18° to 19°±23%17% to 40% chance
Mon±3°18° to 21°±10%0% to 10% chance
Tue±4°19° to 22°±6%0% to 6% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Llantwit Major

today, local time
Sunrise
06:53
Sunset
19:21
Daylight
12h 28m

Common questions

What's the weather in Llantwit Major today?
On this page we show what Met Office, European, American each forecast for Llantwit Major today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Llantwit Major today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Met Office, European, American for Llantwit Major and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Llantwit Major?
Over the last 30 days, the European model has been the most accurate for Llantwit Major (CheckWeather Score 91/100), ahead of the Met Office at 87. We grade every model against the recorded weather. See the UK accuracy scoreboard for the full method.
What is the warmest month in Llantwit Major?
June is typically the warmest month in Llantwit Major, with average highs around 19°C.
How cold does Llantwit Major get?
The coldest month in Llantwit Major is January, when overnight lows average about 3°C.
How much rain does Llantwit Major get?
Llantwit Major sees roughly 1488 mm of precipitation a year, with March usually the wettest month.

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