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Ystalyfera weather

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Ystalyfera weather warnings

Met Office yellow, amber and red warnings for Wales

Checking the Met Office for warnings in force for Wales…

Ystalyfera weather in numbers

measured normals and 10 years of recorded weather

Ystalyfera 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 2344 mm of precipitation. Over 10 years of recorded weather it averages 7 days a year at 25°C or above, 16 frost nights, and rain on 208 days.

Warmest month
June
19°C average high
Coldest month
January
3°C average low
Wettest month
March
2344 mm a year
Comfortable
4 months
May, June, July and August
Residents
10,000
share this forecast
Most accurate here
European
98/100 CheckWeather Score
Warm days
7 days
a year at 25°C or above
Frost nights
16 nights
a year below 0°C
Rain days
208 days
a year with 1 mm or more

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

where the models agree, and where they split

Ystalyfera, Wales is at its warmest in Jun (average highs near 19°C) and coldest in Jan (lows around 3°C), with roughly 2344 mm of precipitation across the year. Below, compare what Met Office, European, American forecast for Ystalyfera 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.

Ystalyfera climate by month

average daytime high and overnight low across a typical year
Jan
Feb
Mar
10°
Apr
12°
May
17°
Jun
19°
11°
Jul
18°
12°
Aug
18°
13°
Sep
18°
12°
Oct
14°
10°
Nov
10°
Dec

Which forecast is most accurate in Ystalyfera?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
98
/100rank #1
96±0.2°C98±0.7 mph100100% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
77
/100rank #2
73±1.5°C91±2.8 mph7184% hitNOAA / NCEP (United States)College Park, Maryland, USA
Met Office logo
Met Office
76
/100rank #3
85±0.8°C94±1.8 mph5374% hitMet Office (United Kingdom)Exeter, United Kingdom

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 Ystalyfera today?
On this page we show what Met Office, European, American each forecast for Ystalyfera 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 Ystalyfera today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Met Office, European, American for Ystalyfera 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 Ystalyfera?
Over the last 30 days, the European model has been the most accurate for Ystalyfera (CheckWeather Score 98/100), ahead of the American at 77. We grade every model against the recorded weather. See the UK accuracy scoreboard for the full method.
What is the warmest month in Ystalyfera?
June is typically the warmest month in Ystalyfera, with average highs around 19°C.
How cold does Ystalyfera get?
The coldest month in Ystalyfera is January, when overnight lows average about 3°C.
How much rain does Ystalyfera get?
Ystalyfera sees roughly 2344 mm of precipitation a year, with March usually the wettest month.

Nearby

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