As of 18:03 BST

Weather in Penmaenpool / Llyn Penmaen

+12°

Penmaenpool / Llyn Penmaen, Thursday, 8 October, 18:03

Rain. Feels like 12°C. High 13°C, low 6°C.

Pressure1020 mb

Wind11 mph SW

Humidity94%

Visibility3.0 mi

Dew point11°C

Detailed hourly forecast

The month ahead in Penmaenpool / Llyn Penmaen: daytime temperatures averaging +12.7° and +7.8° overnight — that is 1° below the climate average for October. Rain is expected on 9 days (around 90 mm), against a normal of 9 days and 67 mm. The warmest day should be 9 October (+15.7°), the coolest 8 October (+6°).

+12.7°/+7.8°

Average day / night

−1°

Below average

9 / 9

Wet days / normal

90 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+12.5°	+14.1°	-1.5°
18 October – 27 October	+13°	+12.8°	+0.2°
28 October – 6 November	near average	+11.7°	—

October records over 66 years

+24.3°1 October 2011All-time high

-1.9°30 October 2018All-time low

Climate averages and records are calculated from the nearest reference point — Dolgellau (3.4 km away).

Fri, 09+10 ° /16 °

20.1

+16 °

Penmaenpool / Llyn Penmaen, Friday, 9 October

Rain. High 16°C, low 10°C.

Pressure1010 mb

Wind15 mph NW

Humidity86%

Visibility6.2 mi

Dew point10°C

Sat, 10+8 ° /10 °

4.6

+10 °

Penmaenpool / Llyn Penmaen, Saturday, 10 October

Light rain. High 10°C, low 8°C.

Pressure1014 mb

Wind19 mph W

Humidity78%

Visibility5.4 mi

Dew point7°C

Sun, 11+7 ° /11 °

+11 °

Penmaenpool / Llyn Penmaen, Sunday, 11 October

Overcast. High 11°C, low 7°C.

Pressure1013 mb

Wind5 mph W

Humidity68%

Visibility6.2 mi

Dew point6°C

Mon, 12+8 ° /15 °

3.4

+15 °

Penmaenpool / Llyn Penmaen, Monday, 12 October

Light rain. High 15°C, low 8°C.

Pressure1011 mb

Wind11 mph S

Humidity91%

Visibility6.2 mi

Dew point14°C

Tue, 13+11 ° /14 °

12.3

+14 °

Penmaenpool / Llyn Penmaen, Tuesday, 13 October

Rain. High 14°C, low 11°C.

Pressure1020 mb

Wind18 mph SW

Humidity83%

Visibility—

Dew point11°C

Wed, 14+8 ° /14 °

16.3

+14 °

Penmaenpool / Llyn Penmaen, Wednesday, 14 October

Rain. High 14°C, low 8°C.

Pressure1018 mb

Wind18 mph SW

Humidity85%

Visibility—

Dew point11°C

Thu, 15+7 ° /10 °

7.7

+10 °

Penmaenpool / Llyn Penmaen, Thursday, 15 October

Light rain. High 10°C, low 7°C.

Pressure1020 mb

Wind18 mph W

Humidity81%

Visibility—

Dew point6°C

Fri, 16+6 ° /10 °

0.5

+10 °

Penmaenpool / Llyn Penmaen, Friday, 16 October

Light rain. High 10°C, low 6°C.

Pressure1022 mb

Wind9 mph W

Humidity74%

Visibility—

Dew point6°C

Sat, 17+7 ° /12 °

1.9

+12 °

Penmaenpool / Llyn Penmaen, Saturday, 17 October

Light rain. High 12°C, low 7°C.

Pressure1021 mb

Wind9 mph E

Humidity69%

Visibility—

Dew point6°C

Sun, 18+10 ° /12 °

10.7

+12 °

Penmaenpool / Llyn Penmaen, Sunday, 18 October

Rain. High 12°C, low 10°C.

Pressure1019 mb

Wind6 mph N

Humidity97%

Visibility—

Dew point11°C

Mon, 19+9 ° /11 °

0.1

+11 °

Penmaenpool / Llyn Penmaen, Monday, 19 October

Light rain. High 11°C, low 9°C.

Pressure1030 mb

Wind6 mph NE

Humidity84%

Visibility—

Dew point9°C

Tue, 20+7 ° /13 °

+13 °

Penmaenpool / Llyn Penmaen, Tuesday, 20 October

Overcast. High 13°C, low 7°C.

Pressure1033 mb

Wind5 mph E

Humidity64%

Visibility—

Dew point5°C

Wed, 21+7 ° /14 °

+14 °

Penmaenpool / Llyn Penmaen, Wednesday, 21 October

Overcast. High 14°C, low 7°C.

Pressure1031 mb

Wind5 mph E

Humidity57%

Visibility—

Dew point5°C

Thu, 22+8 ° /14 °

+14 °

Penmaenpool / Llyn Penmaen, Thursday, 22 October

Clear sky. High 14°C, low 8°C.

Pressure1026 mb

Wind6 mph E

Humidity66%

Visibility—

Dew point7°C

Fri, 23+7 ° /14 °

+14 °

Penmaenpool / Llyn Penmaen, Friday, 23 October

Clear sky. High 14°C, low 7°C.

Pressure1018 mb

Wind5 mph E

Humidity58%

Visibility—

Dew point5°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+8 ° /13 °

5.6

+13 °

Penmaenpool / Llyn Penmaen, Saturday, 24 October

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

Average high13°C

Average low8°C

Average rainfall5.6 mm

Chance of rain55%

Warmest on record+17° (1995)

Coldest on record+2° (2002)

Sun, 25+8 ° /13 °

+13 °

Penmaenpool / Llyn Penmaen, Sunday, 25 October

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

Average high13°C

Average low8°C

Average rainfall6 mm

Chance of rain62%

Warmest on record+16° (2013)

Coldest on record-1° (2010)

Mon, 26+8 ° /13 °

4.8

+13 °

Penmaenpool / Llyn Penmaen, Monday, 26 October

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

Average high13°C

Average low8°C

Average rainfall4.8 mm

Chance of rain55%

Warmest on record+17° (2005)

Coldest on record+1° (1997)

Tue, 27+8 ° /13 °

6.1

+13 °

Penmaenpool / Llyn Penmaen, Tuesday, 27 October

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

Average high13°C

Average low8°C

Average rainfall6.1 mm

Chance of rain63%

Warmest on record+20° (2005)

Coldest on record+0° (2003)

Wed, 28+8 ° /12 °

6.4

+12 °

Penmaenpool / Llyn Penmaen, Wednesday, 28 October

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

Average high12°C

Average low8°C

Average rainfall6.4 mm

Chance of rain60%

Warmest on record+17° (2014)

Coldest on record+1° (2008)

Thu, 29+7 ° /12 °

+12 °

Penmaenpool / Llyn Penmaen, Thursday, 29 October

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

Average high12°C

Average low7°C

Average rainfall5 mm

Chance of rain55%

Warmest on record+18° (2022)

Coldest on record-1° (2018)

Fri, 30+8 ° /12 °

5.1

+12 °

Penmaenpool / Llyn Penmaen, Friday, 30 October

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

Average high12°C

Average low8°C

Average rainfall5.1 mm

Chance of rain62%

Warmest on record+17° (2015)

Coldest on record-2° (2018)

Sat, 31+8 ° /13 °

+13 °

Penmaenpool / Llyn Penmaen, Saturday, 31 October

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

Average high13°C

Average low8°C

Average rainfall6 mm

Chance of rain63%

Warmest on record+20° (2014)

Coldest on record0° (1988)

Sun, 01+8 ° /12 °

6.6

+12 °

Penmaenpool / Llyn Penmaen, Sunday, 1 November

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

Average high12°C

Average low8°C

Average rainfall6.6 mm

Chance of rain65%

Warmest on record+17° (2015)

Coldest on record0° (1988)

Mon, 02+8 ° /12 °

7.4

+12 °

Penmaenpool / Llyn Penmaen, Monday, 2 November

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

Average high12°C

Average low8°C

Average rainfall7.4 mm

Chance of rain62%

Warmest on record+16° (2005)

Coldest on record+1° (2006)

Tue, 03+7 ° /11 °

5.6

+11 °

Penmaenpool / Llyn Penmaen, Tuesday, 3 November

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

Average high11°C

Average low7°C

Average rainfall5.6 mm

Chance of rain65%

Warmest on record+16° (2011)

Coldest on record-2° (2006)

Wed, 04+7 ° /11 °

4.1

+11 °

Penmaenpool / Llyn Penmaen, Wednesday, 4 November

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

Average high11°C

Average low7°C

Average rainfall4.1 mm

Chance of rain53%

Warmest on record+15° (2025)

Coldest on record-1° (1968)

Thu, 05+7 ° /11 °

4.8

+11 °

Penmaenpool / Llyn Penmaen, Thursday, 5 November

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

Average high11°C

Average low7°C

Average rainfall4.8 mm

Chance of rain52%

Warmest on record+18° (2025)

Coldest on record0° (1965)

Fri, 06+7 ° /11 °

3.7

+11 °

Penmaenpool / Llyn Penmaen, Friday, 6 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 rain53%

Warmest on record+16° (2025)

Coldest on record+2° (1960)

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 Penmaenpool / Llyn Penmaen 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 Penmaenpool / Llyn Penmaen 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.