As of 20:18 BST

Weather in Ystrad Mynach

+22°

Ystrad Mynach, Saturday, 8 August, 20:18

Overcast. Feels like 22°C. High 25°C, low 9°C.

Pressure1016 mb

Wind1 mph W

Humidity51%

Visibility6.2 mi

Dew point11°C

Detailed hourly forecast

Sun, 09+11 ° /26 °

+26 °

Ystrad Mynach, Sunday, 9 August

Partly cloudy. High 26°C, low 11°C.

Pressure1013 mb

Wind10 mph W

Humidity26%

Visibility6.2 mi

Dew point7°C

Mon, 10+11 ° /26 °

+26 °

Ystrad Mynach, Monday, 10 August

Overcast. High 26°C, low 11°C.

Pressure1021 mb

Wind3 mph S

Humidity30%

Visibility6.2 mi

Dew point6°C

Tue, 11+11 ° /29 °

+29 °

Ystrad Mynach, Tuesday, 11 August

Clear sky. High 29°C, low 11°C.

Pressure1024 mb

Wind10 mph SE

Humidity35%

Visibility6.2 mi

Dew point8°C

Wed, 12+13 ° /34 °

+34 °

Ystrad Mynach, Wednesday, 12 August

Overcast. High 34°C, low 13°C.

Pressure1022 mb

Wind8 mph SE

Humidity21%

Visibility6.2 mi

Dew point5°C

Thu, 13+18 ° /36 °

+36 °

Ystrad Mynach, Thursday, 13 August

Mainly clear. High 36°C, low 18°C.

Pressure1017 mb

Wind14 mph S

Humidity9%

Visibility—

Dew point-4°C

Fri, 14+15 ° /27 °

+27 °

Ystrad Mynach, Friday, 14 August

Clear sky. High 27°C, low 15°C.

Pressure1017 mb

Wind16 mph W

Humidity45%

Visibility—

Dew point13°C

Sat, 15+14 ° /24 °

1.6

+24 °

Ystrad Mynach, Saturday, 15 August

Light rain. High 24°C, low 14°C.

Pressure1016 mb

Wind8 mph NW

Humidity60%

Visibility—

Dew point14°C

Sun, 16+15 ° /24 °

+24 °

Ystrad Mynach, Sunday, 16 August

Overcast. High 24°C, low 15°C.

Pressure1014 mb

Wind15 mph W

Humidity36%

Visibility—

Dew point7°C

Mon, 17+12 ° /22 °

0.4

+22 °

Ystrad Mynach, Monday, 17 August

Light rain. High 22°C, low 12°C.

Pressure1013 mb

Wind15 mph NW

Humidity49%

Visibility—

Dew point9°C

Tue, 18+10 ° /20 °

0.2

+20 °

Ystrad Mynach, Tuesday, 18 August

Light rain. High 20°C, low 10°C.

Pressure1011 mb

Wind15 mph NW

Humidity65%

Visibility—

Dew point9°C

Wed, 19+10 ° /23 °

+23 °

Ystrad Mynach, Wednesday, 19 August

Overcast. High 23°C, low 10°C.

Pressure1013 mb

Wind13 mph W

Humidity36%

Visibility—

Dew point5°C

Thu, 20+12 ° /20 °

0.9

+20 °

Ystrad Mynach, Thursday, 20 August

Light rain. High 20°C, low 12°C.

Pressure1007 mb

Wind16 mph NW

Humidity64%

Visibility—

Dew point12°C

Fri, 21+8 ° /21 °

+21 °

Ystrad Mynach, Friday, 21 August

Overcast. High 21°C, low 8°C.

Pressure1014 mb

Wind16 mph NW

Humidity40%

Visibility—

Dew point4°C

Sat, 22+11 ° /20 °

0.6

+20 °

Ystrad Mynach, Saturday, 22 August

Light rain. High 20°C, low 11°C.

Pressure1014 mb

Wind23 mph W

Humidity48%

Visibility—

Dew point8°C

Sun, 23+10 ° /19 °

+19 °

Ystrad Mynach, Sunday, 23 August

Overcast. High 19°C, low 10°C.

Pressure1022 mb

Wind16 mph NW

Humidity37%

Visibility—

Dew point3°C

Questions about the month ahead

How accurate is a month-long forecast?

The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Ystrad Mynach are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.

What does "above average" mean?

We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.

Where do the 66-year records come from?

These are real historical extremes recorded in Ystrad Mynach since 1960: the highest and lowest temperature for each calendar date, with the year it happened.

How often is the 30-day forecast updated?

The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.