As of 20:40 BST

Weather in Llandecwyn

+10°

Llandecwyn, Wednesday, 7 October, 20:40

Mainly clear. Feels like 10°C. High 13°C, low 10°C.

Pressure1018 mb

Wind10 mph N

Humidity98%

Visibility6.2 mi

Dew point10°C

Detailed hourly forecast

The month ahead in Llandecwyn: daytime temperatures averaging +13.2° and +8.8° overnight — that is 0.1° below the climate average for October. Rain is expected on 14 days (around 126 mm), against a normal of 10 days and 81 mm. The warmest day should be 12 October (+16.2°), the coolest 18 October (+5.2°).

+13.2°/+8.8°

Average day / night

−0.1°

Below average

14 / 10

Wet days / normal

126 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+13.8°	+13.7°	+0.1°
17 October – 26 October	+12.2°	+12.5°	-0.3°
27 October – 5 November	near average	+11.5°	—

October records over 66 years

+23°1 October 2011All-time high

-1.2°25 October 2010All-time low

Climate averages and records are calculated from the nearest reference point — Porthmadog (5.4 km away).

Thu, 08+10 ° /14 °

7.8

+14 °

Llandecwyn, Thursday, 8 October

Rain. High 14°C, low 10°C.

Pressure1024 mb

Wind10 mph NW

Humidity65%

Visibility6.2 mi

Dew point6°C

Fri, 09+11 ° /15 °

19.5

+15 °

Llandecwyn, Friday, 9 October

Heavy rain. High 15°C, low 11°C.

Pressure1010 mb

Wind15 mph NW

Humidity83%

Visibility6.2 mi

Dew point10°C

Sat, 10+10 ° /12 °

5.7

+12 °

Llandecwyn, Saturday, 10 October

Light rain. High 12°C, low 10°C.

Pressure1012 mb

Wind17 mph W

Humidity82%

Visibility6.2 mi

Dew point8°C

Sun, 11+8 ° /12 °

0.7

+12 °

Llandecwyn, Sunday, 11 October

Light rain. High 12°C, low 8°C.

Pressure1014 mb

Wind7 mph W

Humidity78%

Visibility6.2 mi

Dew point8°C

Mon, 12+10 ° /16 °

6.4

+16 °

Llandecwyn, Monday, 12 October

Light rain. High 16°C, low 10°C.

Pressure1009 mb

Wind16 mph SW

Humidity94%

Visibility—

Dew point15°C

Tue, 13+11 ° /16 °

10.2

+16 °

Llandecwyn, Tuesday, 13 October

Rain. High 16°C, low 11°C.

Pressure1021 mb

Wind19 mph SW

Humidity78%

Visibility—

Dew point10°C

Wed, 14+11 ° /15 °

1.4

+15 °

Llandecwyn, Wednesday, 14 October

Light rain. High 15°C, low 11°C.

Pressure1029 mb

Wind13 mph SW

Humidity91%

Visibility—

Dew point13°C

Thu, 15+9 ° /14 °

5.6

+14 °

Llandecwyn, Thursday, 15 October

Rain. High 14°C, low 9°C.

Pressure1018 mb

Wind17 mph S

Humidity96%

Visibility—

Dew point12°C

Fri, 16+7 ° /12 °

+12 °

Llandecwyn, Friday, 16 October

Overcast. High 12°C, low 7°C.

Pressure1025 mb

Wind7 mph S

Humidity70%

Visibility—

Dew point6°C

Sat, 17+6 ° /12 °

3.8

+12 °

Llandecwyn, Saturday, 17 October

Light rain. High 12°C, low 6°C.

Pressure1010 mb

Wind11 mph S

Humidity93%

Visibility—

Dew point11°C

Sun, 18+5 ° /14 °

1.2

+14 °

Llandecwyn, Sunday, 18 October

Light rain. High 14°C, low 5°C.

Pressure1012 mb

Wind25 mph S

Humidity66%

Visibility—

Dew point4°C

Mon, 19+9 ° /14 °

29.3

+14 °

Llandecwyn, Monday, 19 October

Rain. High 14°C, low 9°C.

Pressure995 mb

Wind25 mph SW

Humidity78%

Visibility—

Dew point7°C

Tue, 20+9 ° /11 °

18.5

+11 °

Llandecwyn, Tuesday, 20 October

Rain. High 11°C, low 9°C.

Pressure995 mb

Wind25 mph SW

Humidity75%

Visibility—

Dew point6°C

Wed, 21+7 ° /10 °

5.9

+10 °

Llandecwyn, Wednesday, 21 October

Light rain. High 10°C, low 7°C.

Pressure1006 mb

Wind16 mph W

Humidity74%

Visibility—

Dew point6°C

Thu, 22+7 ° /12 °

8.5

+12 °

Llandecwyn, Thursday, 22 October

Rain. High 12°C, low 7°C.

Pressure1005 mb

Wind12 mph S

Humidity83%

Visibility—

Dew point8°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+8 ° /12 °

4.7

+12 °

Llandecwyn, Friday, 23 October

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

Average high12°C

Average low8°C

Average rainfall4.7 mm

Chance of rain63%

Warmest on record+18° (1996)

Coldest on record+1° (1993)

Sat, 24+8 ° /12 °

6.7

+12 °

Llandecwyn, Saturday, 24 October

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

Average high12°C

Average low8°C

Average rainfall6.7 mm

Chance of rain65%

Warmest on record+17° (1995)

Coldest on record+2° (2002)

Sun, 25+8 ° /12 °

7.3

+12 °

Llandecwyn, Sunday, 25 October

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

Average high12°C

Average low8°C

Average rainfall7.3 mm

Chance of rain67%

Warmest on record+17° (2024)

Coldest on record-1° (2010)

Mon, 26+8 ° /12 °

5.2

+12 °

Llandecwyn, Monday, 26 October

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

Average high12°C

Average low8°C

Average rainfall5.2 mm

Chance of rain67%

Warmest on record+17° (2005)

Coldest on record+1° (1997)

Tue, 27+8 ° /12 °

6.7

+12 °

Llandecwyn, Tuesday, 27 October

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

Average high12°C

Average low8°C

Average rainfall6.7 mm

Chance of rain62%

Warmest on record+19° (2005)

Coldest on record+0° (1962)

Wed, 28+8 ° /12 °

7.1

+12 °

Llandecwyn, Wednesday, 28 October

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

Average high12°C

Average low8°C

Average rainfall7.1 mm

Chance of rain67%

Warmest on record+17° (2022)

Coldest on record+2° (2008)

Thu, 29+7 ° /12 °

5.1

+12 °

Llandecwyn, Thursday, 29 October

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

Average high12°C

Average low7°C

Average rainfall5.1 mm

Chance of rain63%

Warmest on record+18° (2022)

Coldest on record0° (1997)

Fri, 30+8 ° /12 °

5.7

+12 °

Llandecwyn, Friday, 30 October

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

Average high12°C

Average low8°C

Average rainfall5.7 mm

Chance of rain68%

Warmest on record+16° (2009)

Coldest on record-1° (1988)

Sat, 31+8 ° /12 °

6.5

+12 °

Llandecwyn, Saturday, 31 October

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

Average high12°C

Average low8°C

Average rainfall6.5 mm

Chance of rain65%

Warmest on record+19° (2014)

Coldest on record-1° (1988)

Sun, 01+8 ° /11 °

+11 °

Llandecwyn, Sunday, 1 November

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

Average high11°C

Average low8°C

Average rainfall8 mm

Chance of rain68%

Warmest on record+17° (2015)

Coldest on record-1° (1988)

Mon, 02+7 ° /11 °

7.6

+11 °

Llandecwyn, Monday, 2 November

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

Average high11°C

Average low7°C

Average rainfall7.6 mm

Chance of rain68%

Warmest on record+16° (2015)

Coldest on record+0° (1986)

Tue, 03+7 ° /11 °

6.7

+11 °

Llandecwyn, Tuesday, 3 November

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

Average high11°C

Average low7°C

Average rainfall6.7 mm

Chance of rain72%

Warmest on record+15° (2011)

Coldest on record-2° (2006)

Wed, 04+7 ° /11 °

4.7

+11 °

Llandecwyn, Wednesday, 4 November

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

Average high11°C

Average low7°C

Average rainfall4.7 mm

Chance of rain65%

Warmest on record+14° (2015)

Coldest on record-1° (1968)

Thu, 05+7 ° /11 °

5.6

+11 °

Llandecwyn, Thursday, 5 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 rain58%

Warmest on record+18° (2025)

Coldest on record0° (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 Llandecwyn 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 Llandecwyn 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.