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CheckWeather UKLlandaff

Llandaff weather

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Llandaff weather warnings

Met Office yellow, amber and red warnings for Wales

Checking the Met Office for warnings in force for Wales…

Llandaff weather in numbers

measured normals and 10 years of recorded weather

Llandaff swings 18°C across the year, from 20°C highs in June to 2°C lows in January, and October is usually the wettest month in a year that brings about 1510 mm of precipitation. Over 10 years of recorded weather it averages 10 days a year at 25°C or above, 1 of them at 30°C or above, 22 frost nights, and rain on 171 days.

Warmest month
June
20°C average high
Coldest month
January
2°C average low
Wettest month
October
1510 mm a year
Comfortable
4 months
May, June, July and August
Residents
8,776
share this forecast
Most accurate here
European
96/100 CheckWeather Score
Warm days
10 days
a year at 25°C or above
Frost nights
22 nights
a year below 0°C
Rain days
171 days
a year with 1 mm or more

Day counts are from the ERA5 reanalysis for Llandaff’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 Llandaff and nearby towns.Live rain radar →
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Llandaff 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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Llandaff 10-day forecast, out to 14 days

where the models agree, and where they split

Llandaff, Wales is at its warmest in Jun (average highs near 20°C) and coldest in Jan (lows around 2°C), with roughly 1510 mm of precipitation across the year. Below, compare what Met Office, European, American forecast for Llandaff 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.

Llandaff climate by month

average daytime high and overnight low across a typical year
Jan
Feb
10°
Mar
10°
Apr
12°
May
17°
Jun
20°
11°
Jul
19°
12°
Aug
20°
13°
Sep
19°
12°
Oct
15°
Nov
11°
Dec
10°

Which forecast is most accurate in Llandaff?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
96
/100rank #1
96±0.2°C98±0.5 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
Met Office logo
Met Office
83
/100rank #2
91±0.5°C95±1.5 mph6581% hitMet Office (United Kingdom)Exeter, United Kingdom
American logo
American
76
/100rank #3
89±0.6°C89±3.4 mph5374% 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.

Common questions

What's the weather in Llandaff today?
On this page we show what Met Office, European, American each forecast for Llandaff 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 Llandaff today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Met Office, European, American for Llandaff 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 Llandaff?
Over the last 30 days, the European model has been the most accurate for Llandaff (CheckWeather Score 96/100), ahead of the Met Office at 83. We grade every model against the recorded weather. See the UK accuracy scoreboard for the full method.
What is the warmest month in Llandaff?
June is typically the warmest month in Llandaff, with average highs around 20°C.
How cold does Llandaff get?
The coldest month in Llandaff is January, when overnight lows average about 2°C.
How much rain does Llandaff get?
Llandaff sees roughly 1510 mm of precipitation a year, with October usually the wettest month.

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