As of 15:21 BST

Weather in Garnlydan

+15°

Garnlydan, Wednesday, 7 October, 15:21

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

Pressure1015 mb

Wind14 mph N

Humidity71%

Visibility6.2 mi

Dew point8°C

Detailed hourly forecast

The month ahead in Garnlydan: daytime temperatures averaging +11.9° and +5.3° overnight — that is 0.3° below the climate average for October. Rain is expected on 8 days (around 56 mm), against a normal of 7 days and 55 mm. The warmest day should be 12 October (+15.1°), the coolest 21 October (+1.8°).

+11.9°/+5.3°

Average day / night

−0.3°

Below average

8 / 7

Wet days / normal

56 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+12.6°	+12.6°	+0°
17 October – 26 October	+10.6°	+11.4°	-0.8°
27 October – 5 November	near average	+10.3°	—

October records over 66 years

+22.3°1 October 2011All-time high

-3.7°16 October 1993All-time low

Climate averages and records are calculated from the nearest reference point — Brynmawr (2.5 km away).

Thu, 08+6 ° /12 °

0.1

+12 °

Garnlydan, Thursday, 8 October

Light rain. High 12°C, low 6°C.

Pressure1024 mb

Wind12 mph NW

Humidity67%

Visibility6.2 mi

Dew point5°C

Fri, 09+8 ° /14 °

5.8

+14 °

Garnlydan, Friday, 9 October

Rain. High 14°C, low 8°C.

Pressure1011 mb

Wind19 mph W

Humidity98%

Visibility1.7 mi

Dew point13°C

Sat, 10+7 ° /10 °

+10 °

Garnlydan, Saturday, 10 October

Overcast. High 10°C, low 7°C.

Pressure1013 mb

Wind16 mph W

Humidity66%

Visibility6.2 mi

Dew point4°C

Sun, 11+5 ° /10 °

+10 °

Garnlydan, Sunday, 11 October

Overcast. High 10°C, low 5°C.

Pressure1015 mb

Wind7 mph W

Humidity66%

Visibility6.2 mi

Dew point4°C

Mon, 12+7 ° /15 °

5.5

+15 °

Garnlydan, Monday, 12 October

Light rain. High 15°C, low 7°C.

Pressure1011 mb

Wind14 mph SW

Humidity99%

Visibility—

Dew point13°C

Tue, 13+7 ° /14 °

2.5

+14 °

Garnlydan, Tuesday, 13 October

Light rain. High 14°C, low 7°C.

Pressure1021 mb

Wind17 mph NW

Humidity74%

Visibility—

Dew point9°C

Wed, 14+6 ° /14 °

+14 °

Garnlydan, Wednesday, 14 October

Mainly clear. High 14°C, low 6°C.

Pressure1030 mb

Wind11 mph SW

Humidity65%

Visibility—

Dew point6°C

Thu, 15+5 ° /13 °

0.3

+13 °

Garnlydan, Thursday, 15 October

Light rain. High 13°C, low 5°C.

Pressure1019 mb

Wind15 mph SW

Humidity86%

Visibility—

Dew point10°C

Fri, 16+4 ° /10 °

+10 °

Garnlydan, Friday, 16 October

Overcast. High 10°C, low 4°C.

Pressure1026 mb

Wind7 mph SE

Humidity58%

Visibility—

Dew point1°C

Sat, 17+5 ° /12 °

0.7

+12 °

Garnlydan, Saturday, 17 October

Light rain. High 12°C, low 5°C.

Pressure1012 mb

Wind11 mph W

Humidity89%

Visibility—

Dew point9°C

Sun, 18+4 ° /12 °

0.2

+12 °

Garnlydan, Sunday, 18 October

Light rain. High 12°C, low 4°C.

Pressure1012 mb

Wind21 mph S

Humidity69%

Visibility—

Dew point5°C

Mon, 19+7 ° /12 °

9.7

+12 °

Garnlydan, Monday, 19 October

Light rain. High 12°C, low 7°C.

Pressure999 mb

Wind27 mph SW

Humidity79%

Visibility—

Dew point4°C

Tue, 20+5 ° /9 °

11.8

+9 °

Garnlydan, Tuesday, 20 October

Rain. High 9°C, low 5°C.

Pressure997 mb

Wind18 mph SW

Humidity76%

Visibility—

Dew point4°C

Wed, 21+2 ° /9 °

3.3

+9 °

Garnlydan, Wednesday, 21 October

Light rain. High 9°C, low 2°C.

Pressure1007 mb

Wind12 mph W

Humidity67%

Visibility—

Dew point2°C

Thu, 22+3 ° /10 °

12.3

+10 °

Garnlydan, Thursday, 22 October

Rain. High 10°C, low 3°C.

Pressure1007 mb

Wind14 mph SE

Humidity78%

Visibility—

Dew point5°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+6 ° /11 °

3.2

+11 °

Garnlydan, Friday, 23 October

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

Average high11°C

Average low6°C

Average rainfall3.2 mm

Chance of rain35%

Warmest on record+15° (2011)

Coldest on record-1° (1987)

Sat, 24+6 ° /11 °

4.3

+11 °

Garnlydan, Saturday, 24 October

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

Average high11°C

Average low6°C

Average rainfall4.3 mm

Chance of rain48%

Warmest on record+15° (1995)

Coldest on record-2° (1964)

Sun, 25+6 ° /11 °

3.9

+11 °

Garnlydan, Sunday, 25 October

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

Average high11°C

Average low6°C

Average rainfall3.9 mm

Chance of rain48%

Warmest on record+15° (2013)

Coldest on record-3° (2010)

Mon, 26+6 ° /11 °

3.3

+11 °

Garnlydan, Monday, 26 October

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

Average high11°C

Average low6°C

Average rainfall3.3 mm

Chance of rain47%

Warmest on record+16° (2005)

Coldest on record-1° (1997)

Tue, 27+6 ° /11 °

3.7

+11 °

Garnlydan, Tuesday, 27 October

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

Average high11°C

Average low6°C

Average rainfall3.7 mm

Chance of rain48%

Warmest on record+17° (2005)

Coldest on record-3° (2003)

Wed, 28+6 ° /11 °

4.4

+11 °

Garnlydan, Wednesday, 28 October

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

Average high11°C

Average low6°C

Average rainfall4.4 mm

Chance of rain50%

Warmest on record+16° (2014)

Coldest on record-1° (2012)

Thu, 29+5 ° /10 °

3.7

+10 °

Garnlydan, Thursday, 29 October

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

Average high10°C

Average low5°C

Average rainfall3.7 mm

Chance of rain45%

Warmest on record+16° (2022)

Coldest on record-4° (2008)

Fri, 30+5 ° /11 °

4.1

+11 °

Garnlydan, Friday, 30 October

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

Average high11°C

Average low5°C

Average rainfall4.1 mm

Chance of rain55%

Warmest on record+15° (2001)

Coldest on record-2° (1983)

Sat, 31+6 ° /11 °

5.2

+11 °

Garnlydan, Saturday, 31 October

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

Average high11°C

Average low6°C

Average rainfall5.2 mm

Chance of rain60%

Warmest on record+18° (2014)

Coldest on record-3° (1992)

Sun, 01+6 ° /11 °

3.7

+11 °

Garnlydan, Sunday, 1 November

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

Average high11°C

Average low6°C

Average rainfall3.7 mm

Chance of rain50%

Warmest on record+15° (2014)

Coldest on record-1° (2008)

Mon, 02+5 ° /10 °

+10 °

Garnlydan, Monday, 2 November

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

Average high10°C

Average low5°C

Average rainfall5 mm

Chance of rain57%

Warmest on record+15° (2005)

Coldest on record-3° (2006)

Tue, 03+5 ° /10 °

3.1

+10 °

Garnlydan, Tuesday, 3 November

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

Average high10°C

Average low5°C

Average rainfall3.1 mm

Chance of rain48%

Warmest on record+14° (1979)

Coldest on record-4° (2006)

Wed, 04+4 ° /9 °

2.7

+9 °

Garnlydan, Wednesday, 4 November

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

Average high9°C

Average low4°C

Average rainfall2.7 mm

Chance of rain38%

Warmest on record+14° (1978)

Coldest on record-3° (2006)

Thu, 05+4 ° /9 °

3.1

+9 °

Garnlydan, Thursday, 5 November

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

Average high9°C

Average low4°C

Average rainfall3.1 mm

Chance of rain40%

Warmest on record+14° (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 Garnlydan 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 Garnlydan 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.