As of 17:54 BST

Weather in St y-Nyll

+14°

St y-Nyll, Wednesday, 7 October, 17:54

Mainly clear. Feels like 13°C. High 14°C, low 10°C.

Pressure1016 mb

Wind17 mph N

Humidity62%

Visibility6.2 mi

Dew point7°C

Detailed hourly forecast

The month ahead in St y-Nyll: daytime temperatures averaging +14.6° and +8.2° overnight — that is 0.8° above the climate average for October. Rain is expected on 9 days (around 73 mm), against a normal of 8 days and 58 mm. The warmest day should be 12 October (+18.3°), the coolest 21 October (+5.2°).

+14.6°/+8.2°

Average day / night

+0.8°

Above average

9 / 8

Wet days / normal

73 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+15.3°	+14.2°	+1.1°
17 October – 26 October	+13.5°	+13.1°	+0.5°
27 October – 5 November	near average	+12°	—

October records over 66 years

+22.9°1 October 2011All-time high

-0.9°30 October 2018All-time low

Climate averages and records are calculated from the nearest reference point — Pontyclun (6.5 km away).

Thu, 08+9 ° /15 °

0.4

+15 °

St y-Nyll, Thursday, 8 October

Light rain. High 15°C, low 9°C.

Pressure1025 mb

Wind10 mph NW

Humidity62%

Visibility6.2 mi

Dew point6°C

Fri, 09+11 ° /16 °

10.9

+16 °

St y-Nyll, Friday, 9 October

Rain. High 16°C, low 11°C.

Pressure1012 mb

Wind24 mph W

Humidity96%

Visibility1.9 mi

Dew point15°C

Sat, 10+9 ° /14 °

+14 °

St y-Nyll, Saturday, 10 October

Partly cloudy. High 14°C, low 9°C.

Pressure1014 mb

Wind16 mph W

Humidity63%

Visibility6.2 mi

Dew point6°C

Sun, 11+7 ° /13 °

+13 °

St y-Nyll, Sunday, 11 October

Mainly clear. High 13°C, low 7°C.

Pressure1015 mb

Wind5 mph W

Humidity69%

Visibility6.2 mi

Dew point7°C

Mon, 12+9 ° /18 °

7.9

+18 °

St y-Nyll, Monday, 12 October

Rain. High 18°C, low 9°C.

Pressure1011 mb

Wind12 mph W

Humidity96%

Visibility—

Dew point16°C

Tue, 13+10 ° /17 °

1.4

+17 °

St y-Nyll, Tuesday, 13 October

Light rain. High 17°C, low 10°C.

Pressure1021 mb

Wind14 mph W

Humidity70%

Visibility—

Dew point11°C

Wed, 14+9 ° /17 °

+17 °

St y-Nyll, Wednesday, 14 October

Partly cloudy. High 17°C, low 9°C.

Pressure1031 mb

Wind8 mph SW

Humidity64%

Visibility—

Dew point8°C

Thu, 15+7 ° /16 °

0.2

+16 °

St y-Nyll, Thursday, 15 October

Light rain. High 16°C, low 7°C.

Pressure1020 mb

Wind12 mph SW

Humidity73%

Visibility—

Dew point11°C

Fri, 16+6 ° /12 °

+12 °

St y-Nyll, Friday, 16 October

Overcast. High 12°C, low 6°C.

Pressure1026 mb

Wind6 mph NW

Humidity60%

Visibility—

Dew point4°C

Sat, 17+8 ° /14 °

5.2

+14 °

St y-Nyll, Saturday, 17 October

Light rain. High 14°C, low 8°C.

Pressure1012 mb

Wind8 mph W

Humidity98%

Visibility—

Dew point12°C

Sun, 18+7 ° /15 °

0.2

+15 °

St y-Nyll, Sunday, 18 October

Light rain. High 15°C, low 7°C.

Pressure1013 mb

Wind22 mph S

Humidity70%

Visibility—

Dew point7°C

Mon, 19+9 ° /15 °

13.7

+15 °

St y-Nyll, Monday, 19 October

Light rain. High 15°C, low 9°C.

Pressure1000 mb

Wind24 mph SW

Humidity71%

Visibility—

Dew point6°C

Tue, 20+8 ° /11 °

9.4

+11 °

St y-Nyll, Tuesday, 20 October

Light rain. High 11°C, low 8°C.

Pressure998 mb

Wind19 mph SW

Humidity76%

Visibility—

Dew point6°C

Wed, 21+5 ° /12 °

+12 °

St y-Nyll, Wednesday, 21 October

Light rain. High 12°C, low 5°C.

Pressure1007 mb

Wind10 mph W

Humidity64%

Visibility—

Dew point4°C

Thu, 22+6 ° /13 °

14.5

+13 °

St y-Nyll, Thursday, 22 October

Rain. High 13°C, low 6°C.

Pressure1007 mb

Wind15 mph SE

Humidity75%

Visibility—

Dew point8°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+9 ° /13 °

3.4

+13 °

St y-Nyll, Friday, 23 October

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

Average high13°C

Average low9°C

Average rainfall3.4 mm

Chance of rain47%

Warmest on record+17° (2022)

Coldest on record+3° (1987)

Sat, 24+9 ° /13 °

5.1

+13 °

St y-Nyll, Saturday, 24 October

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

Average high13°C

Average low9°C

Average rainfall5.1 mm

Chance of rain57%

Warmest on record+17° (1995)

Coldest on record+1° (1987)

Sun, 25+8 ° /13 °

3.9

+13 °

St y-Nyll, Sunday, 25 October

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

Average high13°C

Average low8°C

Average rainfall3.9 mm

Chance of rain55%

Warmest on record+16° (2013)

Coldest on record0° (2010)

Mon, 26+9 ° /13 °

3.3

+13 °

St y-Nyll, Monday, 26 October

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

Average high13°C

Average low9°C

Average rainfall3.3 mm

Chance of rain50%

Warmest on record+17° (2005)

Coldest on record+3° (1997)

Tue, 27+8 ° /13 °

4.5

+13 °

St y-Nyll, Tuesday, 27 October

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

Average high13°C

Average low8°C

Average rainfall4.5 mm

Chance of rain53%

Warmest on record+19° (2022)

Coldest on record+0° (2003)

Wed, 28+8 ° /13 °

4.9

+13 °

St y-Nyll, Wednesday, 28 October

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

Average high13°C

Average low8°C

Average rainfall4.9 mm

Chance of rain53%

Warmest on record+18° (2014)

Coldest on record+2° (2018)

Thu, 29+8 ° /12 °

4.2

+12 °

St y-Nyll, Thursday, 29 October

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

Average high12°C

Average low8°C

Average rainfall4.2 mm

Chance of rain47%

Warmest on record+17° (2022)

Coldest on record+0° (2018)

Fri, 30+8 ° /12 °

4.5

+12 °

St y-Nyll, Friday, 30 October

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

Average high12°C

Average low8°C

Average rainfall4.5 mm

Chance of rain58%

Warmest on record+17° (2001)

Coldest on record-1° (2018)

Sat, 31+8 ° /13 °

5.5

+13 °

St y-Nyll, Saturday, 31 October

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

Average high13°C

Average low8°C

Average rainfall5.5 mm

Chance of rain60%

Warmest on record+19° (2014)

Coldest on record+0° (1992)

Sun, 01+8 ° /12 °

4.2

+12 °

St y-Nyll, Sunday, 1 November

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

Average high12°C

Average low8°C

Average rainfall4.2 mm

Chance of rain53%

Warmest on record+16° (2014)

Coldest on record+1° (1988)

Mon, 02+7 ° /12 °

5.5

+12 °

St y-Nyll, Monday, 2 November

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

Average high12°C

Average low7°C

Average rainfall5.5 mm

Chance of rain62%

Warmest on record+17° (2005)

Coldest on record0° (2006)

Tue, 03+7 ° /11 °

3.9

+11 °

St y-Nyll, Tuesday, 3 November

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

Average high11°C

Average low7°C

Average rainfall3.9 mm

Chance of rain53%

Warmest on record+15° (2011)

Coldest on record-1° (2006)

Wed, 04+7 ° /11 °

+11 °

St y-Nyll, Wednesday, 4 November

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

Average high11°C

Average low7°C

Average rainfall3 mm

Chance of rain47%

Warmest on record+15° (1978)

Coldest on record-1° (2006)

Thu, 05+7 ° /11 °

+11 °

St y-Nyll, Thursday, 5 November

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

Average high11°C

Average low7°C

Average rainfall3 mm

Chance of rain40%

Warmest on record+15° (2025)

Coldest on record+1° (2021)

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 St y-Nyll 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 St y-Nyll 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.