As of 07:00 BST

Weather in Graig Trewyddfa

+10°

Graig Trewyddfa, Thursday, 8 October, 07:00

Overcast. Feels like 8°C. High 16°C, low 9°C.

Pressure1023 mb

Wind7 mph NW

Humidity87%

Visibility6.2 mi

Dew point7°C

Detailed hourly forecast

The month ahead in Graig Trewyddfa: daytime temperatures averaging +15.3° and +10.3° overnight — that is 1.6° above the climate average for October. Rain is expected on 9 days (around 89 mm), against a normal of 8 days and 64 mm. The warmest day should be 9 October (+18.8°), the coolest 17 October (+5.2°).

+15.3°/+10.3°

Average day / night

+1.6°

Above average

9 / 8

Wet days / normal

89 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+15°	+14.1°	+0.9°
18 October – 27 October	+15.9°	+13°	+2.8°
28 October – 6 November	near average	+12°	—

October records over 66 years

+22.2°1 October 2011All-time high

-0.5°30 October 2018All-time low

Climate averages and records are calculated from the nearest reference point — Swansea / Abertawe (4.1 km away).

Fri, 09+11 ° /19 °

7.6

+19 °

Graig Trewyddfa, Friday, 9 October

Rain. High 19°C, low 11°C.

Pressure1012 mb

Wind18 mph W

Humidity97%

Visibility4.5 mi

Dew point15°C

Sat, 10+9 ° /13 °

+13 °

Graig Trewyddfa, Saturday, 10 October

Partly cloudy. High 13°C, low 9°C.

Pressure1015 mb

Wind16 mph W

Humidity67%

Visibility6.2 mi

Dew point7°C

Sun, 11+7 ° /14 °

+14 °

Graig Trewyddfa, Sunday, 11 October

Overcast. High 14°C, low 7°C.

Pressure1016 mb

Wind5 mph W

Humidity69%

Visibility6.2 mi

Dew point8°C

Mon, 12+12 ° /17 °

25.9

+17 °

Graig Trewyddfa, Monday, 12 October

Rain. High 17°C, low 12°C.

Pressure1015 mb

Wind13 mph SE

Humidity95%

Visibility—

Dew point15°C

Tue, 13+13 ° /17 °

6.2

+17 °

Graig Trewyddfa, Tuesday, 13 October

Rain. High 17°C, low 13°C.

Pressure1021 mb

Wind15 mph SW

Humidity95%

Visibility—

Dew point16°C

Wed, 14+9 ° /15 °

+15 °

Graig Trewyddfa, Wednesday, 14 October

Overcast. High 15°C, low 9°C.

Pressure1023 mb

Wind10 mph SW

Humidity77%

Visibility—

Dew point10°C

Thu, 15+10 ° /13 °

13.8

+13 °

Graig Trewyddfa, Thursday, 15 October

Rain. High 13°C, low 10°C.

Pressure1015 mb

Wind27 mph N

Humidity89%

Visibility—

Dew point9°C

Fri, 16+8 ° /13 °

+13 °

Graig Trewyddfa, Friday, 16 October

Clear sky. High 13°C, low 8°C.

Pressure1024 mb

Wind16 mph N

Humidity61%

Visibility—

Dew point5°C

Sat, 17+5 ° /13 °

1.9

+13 °

Graig Trewyddfa, Saturday, 17 October

Light rain. High 13°C, low 5°C.

Pressure1020 mb

Wind7 mph N

Humidity67%

Visibility—

Dew point5°C

Sun, 18+8 ° /14 °

24.1

+14 °

Graig Trewyddfa, Sunday, 18 October

Rain. High 14°C, low 8°C.

Pressure1016 mb

Wind13 mph SE

Humidity95%

Visibility—

Dew point10°C

Mon, 19+13 ° /15 °

1.3

+15 °

Graig Trewyddfa, Monday, 19 October

Light rain. High 15°C, low 13°C.

Pressure1018 mb

Wind10 mph SE

Humidity86%

Visibility—

Dew point12°C

Tue, 20+14 ° /17 °

6.3

+17 °

Graig Trewyddfa, Tuesday, 20 October

Light rain. High 17°C, low 14°C.

Pressure1018 mb

Wind19 mph E

Humidity82%

Visibility—

Dew point13°C

Wed, 21+13 ° /17 °

+17 °

Graig Trewyddfa, Wednesday, 21 October

Overcast. High 17°C, low 13°C.

Pressure1015 mb

Wind20 mph SE

Humidity77%

Visibility—

Dew point12°C

Thu, 22+13 ° /17 °

+17 °

Graig Trewyddfa, Thursday, 22 October

Overcast. High 17°C, low 13°C.

Pressure1012 mb

Wind19 mph E

Humidity71%

Visibility—

Dew point11°C

Fri, 23+11 ° /15 °

+15 °

Graig Trewyddfa, Friday, 23 October

Overcast. High 15°C, low 11°C.

Pressure1016 mb

Wind16 mph E

Humidity67%

Visibility—

Dew point9°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+9 ° /13 °

5.7

+13 °

Graig Trewyddfa, Saturday, 24 October

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

Average high13°C

Average low9°C

Average rainfall5.7 mm

Chance of rain58%

Warmest on record+16° (1995)

Coldest on record+2° (1987)

Sun, 25+9 ° /13 °

5.2

+13 °

Graig Trewyddfa, Sunday, 25 October

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

Average high13°C

Average low9°C

Average rainfall5.2 mm

Chance of rain55%

Warmest on record+16° (2022)

Coldest on record+1° (2010)

Mon, 26+9 ° /13 °

3.5

+13 °

Graig Trewyddfa, Monday, 26 October

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

Average high13°C

Average low9°C

Average rainfall3.5 mm

Chance of rain52%

Warmest on record+17° (2005)

Coldest on record+4° (2003)

Tue, 27+9 ° /13 °

+13 °

Graig Trewyddfa, Tuesday, 27 October

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

Average high13°C

Average low9°C

Average rainfall5 mm

Chance of rain53%

Warmest on record+18° (2022)

Coldest on record+2° (1962)

Wed, 28+9 ° /13 °

4.8

+13 °

Graig Trewyddfa, Wednesday, 28 October

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

Average high13°C

Average low9°C

Average rainfall4.8 mm

Chance of rain62%

Warmest on record+17° (2014)

Coldest on record+2° (2018)

Thu, 29+9 ° /12 °

4.8

+12 °

Graig Trewyddfa, Thursday, 29 October

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

Average high12°C

Average low9°C

Average rainfall4.8 mm

Chance of rain52%

Warmest on record+17° (2022)

Coldest on record+0° (2018)

Fri, 30+9 ° /13 °

5.2

+13 °

Graig Trewyddfa, Friday, 30 October

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

Average high13°C

Average low9°C

Average rainfall5.2 mm

Chance of rain58%

Warmest on record+17° (2015)

Coldest on record0° (2018)

Sat, 31+9 ° /13 °

5.6

+13 °

Graig Trewyddfa, Saturday, 31 October

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

Average high13°C

Average low9°C

Average rainfall5.6 mm

Chance of rain65%

Warmest on record+19° (2014)

Coldest on record+2° (1966)

Sun, 01+9 ° /12 °

+12 °

Graig Trewyddfa, Sunday, 1 November

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

Average high12°C

Average low9°C

Average rainfall5 mm

Chance of rain57%

Warmest on record+16° (2009)

Coldest on record+2° (2008)

Mon, 02+8 ° /12 °

5.7

+12 °

Graig Trewyddfa, Monday, 2 November

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

Average high12°C

Average low8°C

Average rainfall5.7 mm

Chance of rain60%

Warmest on record+16° (2005)

Coldest on record+1° (2018)

Tue, 03+8 ° /12 °

4.3

+12 °

Graig Trewyddfa, Tuesday, 3 November

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

Average high12°C

Average low8°C

Average rainfall4.3 mm

Chance of rain55%

Warmest on record+15° (2011)

Coldest on record+1° (1985)

Wed, 04+8 ° /11 °

3.1

+11 °

Graig Trewyddfa, Wednesday, 4 November

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

Average high11°C

Average low8°C

Average rainfall3.1 mm

Chance of rain48%

Warmest on record+15° (2025)

Coldest on record+0° (2006)

Thu, 05+8 ° /11 °

3.4

+11 °

Graig Trewyddfa, Thursday, 5 November

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

Average high11°C

Average low8°C

Average rainfall3.4 mm

Chance of rain47%

Warmest on record+16° (2025)

Coldest on record+3° (2006)

Fri, 06+8 ° /11 °

+11 °

Graig Trewyddfa, Friday, 6 November

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

Average high11°C

Average low8°C

Average rainfall3 mm

Chance of rain48%

Warmest on record+15° (2025)

Coldest on record+3° (2017)

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 Graig Trewyddfa 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 Graig Trewyddfa 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.