As of 08:21 BST

Weather in Tal-y-llyn

+9°

Tal-y-llyn, Thursday, 8 October, 08:21

Overcast. Feels like 7°C. High 12°C, low 6°C.

Pressure1022 mb

Wind7 mph NW

Humidity95%

Visibility6.2 mi

Dew point7°C

Detailed hourly forecast

The month ahead in Tal-y-llyn: daytime temperatures averaging +12° and +7.2° overnight — that is 1.6° below the climate average for October. Rain is expected on 8 days (around 85 mm), against a normal of 9 days and 67 mm. The warmest day should be 21 October (+14.9°), the coolest 17 October (+2.1°).

+12°/+7.2°

Average day / night

−1.6°

Below average

8 / 9

Wet days / normal

85 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+11.6°	+14.1°	-2.4°
18 October – 27 October	+12.7°	+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 (8.6 km away).

Fri, 09+9 ° /13 °

23.5

+13 °

Tal-y-llyn, Friday, 9 October

Heavy rain. High 13°C, low 9°C.

Pressure1010 mb

Wind17 mph W

Humidity91%

Visibility6.2 mi

Dew point12°C

Sat, 10+7 ° /10 °

5.2

+10 °

Tal-y-llyn, Saturday, 10 October

Light rain. High 10°C, low 7°C.

Pressure1014 mb

Wind18 mph W

Humidity78%

Visibility6.2 mi

Dew point7°C

Sun, 11+6 ° /10 °

0.3

+10 °

Tal-y-llyn, Sunday, 11 October

Light rain. High 10°C, low 6°C.

Pressure1015 mb

Wind6 mph W

Humidity69%

Visibility6.2 mi

Dew point6°C

Mon, 12+6 ° /14 °

8.2

+14 °

Tal-y-llyn, Monday, 12 October

Light rain. High 14°C, low 6°C.

Pressure1013 mb

Wind12 mph S

Humidity96%

Visibility—

Dew point12°C

Tue, 13+9 ° /14 °

+14 °

Tal-y-llyn, Tuesday, 13 October

Rain. High 14°C, low 9°C.

Pressure1018 mb

Wind16 mph SW

Humidity99%

Visibility—

Dew point14°C

Wed, 14+6 ° /13 °

0.5

+13 °

Tal-y-llyn, Wednesday, 14 October

Light rain. High 13°C, low 6°C.

Pressure1022 mb

Wind9 mph SW

Humidity80%

Visibility—

Dew point9°C

Thu, 15+6 ° /11 °

15.1

+11 °

Tal-y-llyn, Thursday, 15 October

Rain. High 11°C, low 6°C.

Pressure1016 mb

Wind16 mph N

Humidity89%

Visibility—

Dew point7°C

Fri, 16+4 ° /10 °

+10 °

Tal-y-llyn, Friday, 16 October

Clear sky. High 10°C, low 4°C.

Pressure1025 mb

Wind10 mph NE

Humidity64%

Visibility—

Dew point3°C

Sat, 17+2 ° /9 °

0.2

+9 °

Tal-y-llyn, Saturday, 17 October

Light rain. High 9°C, low 2°C.

Pressure1021 mb

Wind7 mph NE

Humidity69%

Visibility—

Dew point3°C

Sun, 18+5 ° /8 °

6.7

+8 °

Tal-y-llyn, Sunday, 18 October

Light rain. High 8°C, low 5°C.

Pressure1016 mb

Wind7 mph E

Humidity94%

Visibility—

Dew point7°C

Mon, 19+9 ° /13 °

0.5

+13 °

Tal-y-llyn, Monday, 19 October

Light rain. High 13°C, low 9°C.

Pressure1017 mb

Wind5 mph E

Humidity76%

Visibility—

Dew point8°C

Tue, 20+11 ° /13 °

1.6

+13 °

Tal-y-llyn, Tuesday, 20 October

Light rain. High 13°C, low 11°C.

Pressure1018 mb

Wind15 mph E

Humidity95%

Visibility—

Dew point11°C

Wed, 21+11 ° /15 °

+15 °

Tal-y-llyn, Wednesday, 21 October

Overcast. High 15°C, low 11°C.

Pressure1016 mb

Wind17 mph SE

Humidity71%

Visibility—

Dew point9°C

Thu, 22+10 ° /14 °

+14 °

Tal-y-llyn, Thursday, 22 October

Overcast. High 14°C, low 10°C.

Pressure1013 mb

Wind16 mph E

Humidity76%

Visibility—

Dew point9°C

Fri, 23+7 ° /12 °

+12 °

Tal-y-llyn, Friday, 23 October

Mainly clear. High 12°C, low 7°C.

Pressure1018 mb

Wind12 mph E

Humidity67%

Visibility—

Dew point5°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+8 ° /13 °

5.6

+13 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 °

Tal-y-llyn, 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 Tal-y-llyn 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 Tal-y-llyn 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.