As of 15:06 BST

Weather in Llantrisant

+13°

Llantrisant, Wednesday, 7 October, 15:06

Mainly clear. Feels like 12°C. High 13°C, low 10°C.

Pressure1017 mb

Wind14 mph NW

Humidity67%

Visibility6.2 mi

Dew point6°C

Detailed hourly forecast

The month ahead in Llantrisant: daytime temperatures averaging +13.5° and +9.9° overnight — that is 0.1° above the climate average for October. Rain is expected on 12 days (around 60 mm), against a normal of 8 days and 49 mm. The warmest day should be 12 October (+16.1°), the coolest 18 October (+7.2°).

+13.5°/+9.9°

Average day / night

+0.1°

Above average

12 / 8

Wet days / normal

60 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+14.2°	+13.8°	+0.4°
17 October – 26 October	+12.3°	+12.7°	-0.4°
27 October – 5 November	near average	+11.8°	—

October records over 66 years

+21.7°10 October 2018All-time high

-2.9°30 October 2018All-time low

Climate averages and records are calculated from the nearest reference point — Llangefni (12.3 km away).

Thu, 08+9 ° /14 °

4.5

+14 °

Llantrisant, Thursday, 8 October

Rain. High 14°C, low 9°C.

Pressure1024 mb

Wind11 mph NW

Humidity66%

Visibility6.2 mi

Dew point6°C

Fri, 09+12 ° /15 °

10.9

+15 °

Llantrisant, Friday, 9 October

Rain. High 15°C, low 12°C.

Pressure1009 mb

Wind21 mph W

Humidity76%

Visibility6.2 mi

Dew point9°C

Sat, 10+11 ° /13 °

4.1

+13 °

Llantrisant, Saturday, 10 October

Light rain. High 13°C, low 11°C.

Pressure1010 mb

Wind25 mph W

Humidity79%

Visibility6.2 mi

Dew point8°C

Sun, 11+9 ° /13 °

0.5

+13 °

Llantrisant, Sunday, 11 October

Light rain. High 13°C, low 9°C.

Pressure1014 mb

Wind8 mph W

Humidity75%

Visibility6.2 mi

Dew point8°C

Mon, 12+10 ° /16 °

2.8

+16 °

Llantrisant, Monday, 12 October

Light rain. High 16°C, low 10°C.

Pressure1007 mb

Wind24 mph S

Humidity94%

Visibility—

Dew point15°C

Tue, 13+13 ° /16 °

8.9

+16 °

Llantrisant, Tuesday, 13 October

Rain. High 16°C, low 13°C.

Pressure1021 mb

Wind26 mph SW

Humidity70%

Visibility—

Dew point9°C

Wed, 14+13 ° /15 °

+15 °

Llantrisant, Wednesday, 14 October

Overcast. High 15°C, low 13°C.

Pressure1028 mb

Wind21 mph S

Humidity83%

Visibility—

Dew point12°C

Thu, 15+10 ° /14 °

4.9

+14 °

Llantrisant, Thursday, 15 October

Rain. High 14°C, low 10°C.

Pressure1018 mb

Wind29 mph S

Humidity78%

Visibility—

Dew point8°C

Fri, 16+10 ° /13 °

+13 °

Llantrisant, Friday, 16 October

Overcast. High 13°C, low 10°C.

Pressure1025 mb

Wind12 mph S

Humidity59%

Visibility—

Dew point5°C

Sat, 17+8 ° /13 °

3.2

+13 °

Llantrisant, Saturday, 17 October

Light rain. High 13°C, low 8°C.

Pressure1011 mb

Wind22 mph SW

Humidity86%

Visibility—

Dew point8°C

Sun, 18+7 ° /14 °

2.3

+14 °

Llantrisant, Sunday, 18 October

Light rain. High 14°C, low 7°C.

Pressure1011 mb

Wind34 mph S

Humidity67%

Visibility—

Dew point5°C

Mon, 19+10 ° /13 °

8.8

+13 °

Llantrisant, Monday, 19 October

Rain. High 13°C, low 10°C.

Pressure993 mb

Wind31 mph SW

Humidity65%

Visibility—

Dew point5°C

Tue, 20+8 ° /11 °

0.8

+11 °

Llantrisant, Tuesday, 20 October

Light rain. High 11°C, low 8°C.

Pressure1001 mb

Wind16 mph NW

Humidity65%

Visibility—

Dew point4°C

Wed, 21+9 ° /12 °

2.1

+12 °

Llantrisant, Wednesday, 21 October

Light rain. High 12°C, low 9°C.

Pressure1009 mb

Wind23 mph NW

Humidity65%

Visibility—

Dew point5°C

Thu, 22+9 ° /12 °

2.8

+12 °

Llantrisant, Thursday, 22 October

Light rain. High 12°C, low 9°C.

Pressure1014 mb

Wind15 mph NW

Humidity92%

Visibility—

Dew point9°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+9 ° /13 °

2.5

+13 °

Llantrisant, Friday, 23 October

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

Average high13°C

Average low9°C

Average rainfall2.5 mm

Chance of rain47%

Warmest on record+18° (1996)

Coldest on record+3° (1987)

Sat, 24+9 ° /13 °

3.7

+13 °

Llantrisant, Saturday, 24 October

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

Average high13°C

Average low9°C

Average rainfall3.7 mm

Chance of rain47%

Warmest on record+18° (1995)

Coldest on record+3° (1987)

Sun, 25+9 ° /12 °

+12 °

Llantrisant, Sunday, 25 October

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

Average high12°C

Average low9°C

Average rainfall4 mm

Chance of rain57%

Warmest on record+17° (2024)

Coldest on record+1° (2010)

Mon, 26+9 ° /12 °

2.8

+12 °

Llantrisant, Monday, 26 October

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

Average high12°C

Average low9°C

Average rainfall2.8 mm

Chance of rain48%

Warmest on record+17° (2005)

Coldest on record+2° (1997)

Tue, 27+9 ° /13 °

+13 °

Llantrisant, Tuesday, 27 October

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

Average high13°C

Average low9°C

Average rainfall4 mm

Chance of rain53%

Warmest on record+19° (2005)

Coldest on record+2° (1962)

Wed, 28+9 ° /12 °

3.9

+12 °

Llantrisant, Wednesday, 28 October

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

Average high12°C

Average low9°C

Average rainfall3.9 mm

Chance of rain62%

Warmest on record+17° (2005)

Coldest on record+3° (1997)

Thu, 29+8 ° /12 °

3.2

+12 °

Llantrisant, Thursday, 29 October

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

Average high12°C

Average low8°C

Average rainfall3.2 mm

Chance of rain52%

Warmest on record+18° (2022)

Coldest on record-1° (2018)

Fri, 30+8 ° /12 °

3.2

+12 °

Llantrisant, Friday, 30 October

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

Average high12°C

Average low8°C

Average rainfall3.2 mm

Chance of rain55%

Warmest on record+16° (2005)

Coldest on record-3° (2018)

Sat, 31+9 ° /12 °

3.9

+12 °

Llantrisant, Saturday, 31 October

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

Average high12°C

Average low9°C

Average rainfall3.9 mm

Chance of rain63%

Warmest on record+18° (2014)

Coldest on record-1° (1988)

Sun, 01+8 ° /12 °

4.4

+12 °

Llantrisant, Sunday, 1 November

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

Average high12°C

Average low8°C

Average rainfall4.4 mm

Chance of rain58%

Warmest on record+15° (2020)

Coldest on record+1° (1988)

Mon, 02+8 ° /12 °

4.6

+12 °

Llantrisant, Monday, 2 November

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

Average high12°C

Average low8°C

Average rainfall4.6 mm

Chance of rain60%

Warmest on record+16° (2005)

Coldest on record+1° (1986)

Tue, 03+8 ° /11 °

3.9

+11 °

Llantrisant, Tuesday, 3 November

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

Average high11°C

Average low8°C

Average rainfall3.9 mm

Chance of rain62%

Warmest on record+16° (2011)

Coldest on record0° (2006)

Wed, 04+7 ° /11 °

2.6

+11 °

Llantrisant, Wednesday, 4 November

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

Average high11°C

Average low7°C

Average rainfall2.6 mm

Chance of rain55%

Warmest on record+15° (2010)

Coldest on record+0° (1968)

Thu, 05+7 ° /11 °

3.7

+11 °

Llantrisant, Thursday, 5 November

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

Average high11°C

Average low7°C

Average rainfall3.7 mm

Chance of rain57%

Warmest on record+17° (2025)

Coldest on record+2° (1965)

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 Llantrisant 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 Llantrisant 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.