As of 10:09 BST

Weather in Cwm Gwyn

+11°

Cwm Gwyn, Thursday, 8 October, 10:09

Overcast. Feels like 11°C. High 15°C, low 7°C.

Pressure1024 mb

Wind7 mph NW

Humidity79%

Visibility6.2 mi

Dew point8°C

Detailed hourly forecast

The month ahead in Cwm Gwyn: daytime temperatures averaging +14.2° and +9.8° overnight — that is 0.4° above the climate average for October. Rain is expected on 9 days (around 35 mm), against a normal of 8 days and 64 mm. The warmest day should be 13 October (+17.1°), the coolest 17 October (+6.5°).

+14.2°/+9.8°

Average day / night

+0.4°

Above average

9 / 8

Wet days / normal

35 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+14.1°	+14.1°	-0.1°
18 October – 27 October	+14.3°	+13°	+1.3°
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 (2.7 km away).

Fri, 09+11 ° /15 °

6.7

+15 °

Cwm Gwyn, Friday, 9 October

Rain. High 15°C, low 11°C.

Pressure1012 mb

Wind24 mph W

Humidity95%

Visibility2.4 mi

Dew point15°C

Sat, 10+10 ° /13 °

+13 °

Cwm Gwyn, Saturday, 10 October

Mainly clear. High 13°C, low 10°C.

Pressure1016 mb

Wind17 mph NW

Humidity68%

Visibility6.2 mi

Dew point7°C

Sun, 11+7 ° /13 °

0.4

+13 °

Cwm Gwyn, Sunday, 11 October

Light rain. High 13°C, low 7°C.

Pressure1014 mb

Wind3 mph SE

Humidity75%

Visibility6.2 mi

Dew point9°C

Mon, 12+13 ° /16 °

3.9

+16 °

Cwm Gwyn, Monday, 12 October

Light rain. High 16°C, low 13°C.

Pressure1013 mb

Wind15 mph SE

Humidity95%

Visibility—

Dew point15°C

Tue, 13+12 ° /17 °

2.1

+17 °

Cwm Gwyn, Tuesday, 13 October

Light rain. High 17°C, low 12°C.

Pressure1022 mb

Wind15 mph SW

Humidity96%

Visibility—

Dew point16°C

Wed, 14+12 ° /15 °

1.4

+15 °

Cwm Gwyn, Wednesday, 14 October

Light rain. High 15°C, low 12°C.

Pressure1021 mb

Wind15 mph SW

Humidity81%

Visibility—

Dew point11°C

Thu, 15+9 ° /12 °

7.1

+12 °

Cwm Gwyn, Thursday, 15 October

Rain. High 12°C, low 9°C.

Pressure1024 mb

Wind25 mph N

Humidity58%

Visibility—

Dew point4°C

Fri, 16+8 ° /12 °

0.2

+12 °

Cwm Gwyn, Friday, 16 October

Light rain. High 12°C, low 8°C.

Pressure1024 mb

Wind11 mph NW

Humidity60%

Visibility—

Dew point4°C

Sat, 17+7 ° /11 °

+11 °

Cwm Gwyn, Saturday, 17 October

Clear sky. High 11°C, low 7°C.

Pressure1016 mb

Wind12 mph E

Humidity56%

Visibility—

Dew point2°C

Sun, 18+8 ° /13 °

+13 °

Cwm Gwyn, Sunday, 18 October

Light rain. High 13°C, low 8°C.

Pressure1016 mb

Wind9 mph N

Humidity67%

Visibility—

Dew point6°C

Mon, 19+10 ° /13 °

+13 °

Cwm Gwyn, Monday, 19 October

Light rain. High 13°C, low 10°C.

Pressure1025 mb

Wind28 mph NE

Humidity63%

Visibility—

Dew point6°C

Tue, 20+10 ° /13 °

5.1

+13 °

Cwm Gwyn, Tuesday, 20 October

Light rain. High 13°C, low 10°C.

Pressure1018 mb

Wind24 mph E

Humidity87%

Visibility—

Dew point9°C

Wed, 21+13 ° /16 °

0.4

+16 °

Cwm Gwyn, Wednesday, 21 October

Light rain. High 16°C, low 13°C.

Pressure1015 mb

Wind23 mph SE

Humidity79%

Visibility—

Dew point12°C

Thu, 22+13 ° /16 °

+16 °

Cwm Gwyn, Thursday, 22 October

Overcast. High 16°C, low 13°C.

Pressure1012 mb

Wind21 mph E

Humidity74%

Visibility—

Dew point11°C

Fri, 23+11 ° /15 °

+15 °

Cwm Gwyn, Friday, 23 October

Overcast. High 15°C, low 11°C.

Pressure1016 mb

Wind18 mph E

Humidity68%

Visibility—

Dew point8°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+9 ° /13 °

5.7

+13 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 °

Cwm Gwyn, 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 Cwm Gwyn 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 Cwm Gwyn 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.