As of 11:36 BST

Weather in Merthyr Vale / Ynysowen

+14°

Merthyr Vale / Ynysowen, Thursday, 8 October, 11:36

Overcast. Feels like 13°C. High 14°C, low 7°C.

Pressure1024 mb

Wind10 mph NW

Humidity75%

Visibility6.2 mi

Dew point10°C

Detailed hourly forecast

The month ahead in Merthyr Vale / Ynysowen: daytime temperatures averaging +13.7° and +8.1° overnight — that is 0.3° above the climate average for October. Rain is expected on 9 days (around 59 mm), against a normal of 7 days and 57 mm. The warmest day should be 13 October (+17.6°), the coolest 17 October (+2.4°).

+13.7°/+8.1°

Average day / night

+0.3°

Above average

9 / 7

Wet days / normal

59 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+14°	+13.8°	+0.3°
18 October – 27 October	+13.1°	+12.6°	+0.6°
28 October – 6 November	near average	+11.4°	—

October records over 66 years

+23.5°1 October 2011All-time high

-2.3°16 October 1993All-time low

Climate averages and records are calculated from the nearest reference point — Treharris (3.4 km away).

Fri, 09+10 ° /15 °

8.8

+15 °

Merthyr Vale / Ynysowen, Friday, 9 October

Rain. High 15°C, low 10°C.

Pressure1012 mb

Wind19 mph SW

Humidity99%

Visibility1.5 mi

Dew point14°C

Sat, 10+8 ° /12 °

0.1

+12 °

Merthyr Vale / Ynysowen, Saturday, 10 October

Light rain. High 12°C, low 8°C.

Pressure1016 mb

Wind16 mph W

Humidity66%

Visibility6.2 mi

Dew point5°C

Sun, 11+7 ° /13 °

+13 °

Merthyr Vale / Ynysowen, Sunday, 11 October

Overcast. High 13°C, low 7°C.

Pressure1014 mb

Wind6 mph W

Humidity72%

Visibility6.2 mi

Dew point7°C

Mon, 12+10 ° /16 °

6.3

+16 °

Merthyr Vale / Ynysowen, Monday, 12 October

Rain. High 16°C, low 10°C.

Pressure1013 mb

Wind12 mph SE

Humidity97%

Visibility—

Dew point15°C

Tue, 13+12 ° /18 °

5.7

+18 °

Merthyr Vale / Ynysowen, Tuesday, 13 October

Light rain. High 18°C, low 12°C.

Pressure1022 mb

Wind15 mph SW

Humidity99%

Visibility—

Dew point16°C

Wed, 14+10 ° /16 °

+16 °

Merthyr Vale / Ynysowen, Wednesday, 14 October

Overcast. High 16°C, low 10°C.

Pressure1021 mb

Wind13 mph SW

Humidity76%

Visibility—

Dew point10°C

Thu, 15+7 ° /12 °

+12 °

Merthyr Vale / Ynysowen, Thursday, 15 October

Rain. High 12°C, low 7°C.

Pressure1023 mb

Wind19 mph NW

Humidity60%

Visibility—

Dew point4°C

Fri, 16+5 ° /12 °

+12 °

Merthyr Vale / Ynysowen, Friday, 16 October

Clear sky. High 12°C, low 5°C.

Pressure1023 mb

Wind9 mph NW

Humidity57%

Visibility—

Dew point3°C

Sat, 17+2 ° /11 °

+11 °

Merthyr Vale / Ynysowen, Saturday, 17 October

Clear sky. High 11°C, low 2°C.

Pressure1016 mb

Wind10 mph E

Humidity60%

Visibility—

Dew point2°C

Sun, 18+5 ° /12 °

1.4

+12 °

Merthyr Vale / Ynysowen, Sunday, 18 October

Light rain. High 12°C, low 5°C.

Pressure1016 mb

Wind7 mph N

Humidity78%

Visibility—

Dew point7°C

Mon, 19+9 ° /13 °

+13 °

Merthyr Vale / Ynysowen, Monday, 19 October

Rain. High 13°C, low 9°C.

Pressure1025 mb

Wind25 mph SE

Humidity69%

Visibility—

Dew point6°C

Tue, 20+8 ° /12 °

+12 °

Merthyr Vale / Ynysowen, Tuesday, 20 October

Light rain. High 12°C, low 8°C.

Pressure1019 mb

Wind18 mph E

Humidity95%

Visibility—

Dew point10°C

Wed, 21+11 ° /13 °

6.7

+13 °

Merthyr Vale / Ynysowen, Wednesday, 21 October

Rain. High 13°C, low 11°C.

Pressure1016 mb

Wind12 mph E

Humidity84%

Visibility—

Dew point10°C

Thu, 22+9 ° /15 °

0.8

+15 °

Merthyr Vale / Ynysowen, Thursday, 22 October

Light rain. High 15°C, low 9°C.

Pressure1023 mb

Wind5 mph N

Humidity70%

Visibility—

Dew point9°C

Fri, 23+8 ° /14 °

+14 °

Merthyr Vale / Ynysowen, Friday, 23 October

Overcast. High 14°C, low 8°C.

Pressure1030 mb

Wind7 mph NE

Humidity69%

Visibility—

Dew point7°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+7 ° /12 °

4.6

+12 °

Merthyr Vale / Ynysowen, Saturday, 24 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall4.6 mm

Chance of rain52%

Warmest on record+16° (1995)

Coldest on record0° (1987)

Sun, 25+7 ° /12 °

4.2

+12 °

Merthyr Vale / Ynysowen, Sunday, 25 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall4.2 mm

Chance of rain48%

Warmest on record+16° (2013)

Coldest on record-2° (2010)

Mon, 26+7 ° /13 °

3.2

+13 °

Merthyr Vale / Ynysowen, Monday, 26 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall3.2 mm

Chance of rain48%

Warmest on record+17° (2005)

Coldest on record+0° (1997)

Tue, 27+7 ° /12 °

3.9

+12 °

Merthyr Vale / Ynysowen, Tuesday, 27 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall3.9 mm

Chance of rain48%

Warmest on record+18° (2005)

Coldest on record-1° (2003)

Wed, 28+7 ° /12 °

4.9

+12 °

Merthyr Vale / Ynysowen, Wednesday, 28 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall4.9 mm

Chance of rain52%

Warmest on record+18° (2014)

Coldest on record+0° (2012)

Thu, 29+7 ° /12 °

3.9

+12 °

Merthyr Vale / Ynysowen, Thursday, 29 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall3.9 mm

Chance of rain45%

Warmest on record+16° (1984)

Coldest on record-2° (2008)

Fri, 30+7 ° /12 °

4.4

+12 °

Merthyr Vale / Ynysowen, Friday, 30 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall4.4 mm

Chance of rain57%

Warmest on record+17° (2001)

Coldest on record-1° (1983)

Sat, 31+7 ° /12 °

5.5

+12 °

Merthyr Vale / Ynysowen, Saturday, 31 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall5.5 mm

Chance of rain58%

Warmest on record+19° (2014)

Coldest on record-1° (1992)

Sun, 01+7 ° /12 °

+12 °

Merthyr Vale / Ynysowen, Sunday, 1 November

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall4 mm

Chance of rain50%

Warmest on record+16° (2014)

Coldest on record+0° (1988)

Mon, 02+7 ° /11 °

5.2

+11 °

Merthyr Vale / Ynysowen, Monday, 2 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low7°C

Average rainfall5.2 mm

Chance of rain57%

Warmest on record+16° (2005)

Coldest on record-2° (2006)

Tue, 03+7 ° /11 °

3.2

+11 °

Merthyr Vale / Ynysowen, Tuesday, 3 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low7°C

Average rainfall3.2 mm

Chance of rain48%

Warmest on record+15° (1979)

Coldest on record-2° (2006)

Wed, 04+6 ° /11 °

2.7

+11 °

Merthyr Vale / Ynysowen, Wednesday, 4 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low6°C

Average rainfall2.7 mm

Chance of rain40%

Warmest on record+15° (1978)

Coldest on record-2° (2006)

Thu, 05+6 ° /11 °

3.1

+11 °

Merthyr Vale / Ynysowen, Thursday, 5 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low6°C

Average rainfall3.1 mm

Chance of rain40%

Warmest on record+15° (1978)

Coldest on record0° (1988)

Fri, 06+6 ° /10 °

2.4

+10 °

Merthyr Vale / Ynysowen, Friday, 6 November

Climate average for this date — the mean of the last 60 years.

Average high10°C

Average low6°C

Average rainfall2.4 mm

Chance of rain42%

Warmest on record+16° (2015)

Coldest on record+1° (2006)

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 Merthyr Vale / Ynysowen 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 Merthyr Vale / Ynysowen 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.