As of 00:38 BST

Weather in Bwlch-derwin

+8°

Bwlch-derwin, Thursday, 8 October, 00:38

Mainly clear. Feels like 5°C. High 12°C, low 8°C.

Pressure1020 mb

Wind16 mph NW

Humidity81%

Visibility6.2 mi

Dew point5°C

Detailed hourly forecast

The month ahead in Bwlch-derwin: daytime temperatures averaging +12.3° and +9.1° overnight — that is 1° below the climate average for October. Rain is expected on 13 days (around 110 mm), against a normal of 10 days and 80 mm. The warmest day should be 12 October (+16°), the coolest 23 October (+6.5°).

+12.3°/+9.1°

Average day / night

−1°

Below average

13 / 10

Wet days / normal

110 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+13.2°	+13.6°	-0.4°
18 October – 27 October	+10.7°	+12.4°	-1.7°
28 October – 6 November	near average	+11.3°	—

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 (13.4 km away).

Fri, 09+11 ° /15 °

17.1

+15 °

Bwlch-derwin, Friday, 9 October

Rain. High 15°C, low 11°C.

Pressure1010 mb

Wind19 mph NW

Humidity78%

Visibility6.2 mi

Dew point10°C

Sat, 10+10 ° /12 °

4.4

+12 °

Bwlch-derwin, Saturday, 10 October

Light rain. High 12°C, low 10°C.

Pressure1014 mb

Wind19 mph W

Humidity75%

Visibility6.2 mi

Dew point7°C

Sun, 11+10 ° /12 °

0.4

+12 °

Bwlch-derwin, Sunday, 11 October

Light rain. High 12°C, low 10°C.

Pressure1015 mb

Wind7 mph NW

Humidity70%

Visibility6.2 mi

Dew point6°C

Mon, 12+10 ° /16 °

3.4

+16 °

Bwlch-derwin, Monday, 12 October

Light rain. High 16°C, low 10°C.

Pressure1012 mb

Wind21 mph S

Humidity91%

Visibility—

Dew point13°C

Tue, 13+10 ° /16 °

5.2

+16 °

Bwlch-derwin, Tuesday, 13 October

Rain. High 16°C, low 10°C.

Pressure1019 mb

Wind20 mph S

Humidity79%

Visibility—

Dew point10°C

Wed, 14+12 ° /14 °

0.4

+14 °

Bwlch-derwin, Wednesday, 14 October

Light rain. High 14°C, low 12°C.

Pressure1024 mb

Wind19 mph S

Humidity89%

Visibility—

Dew point12°C

Thu, 15+9 ° /13 °

5.3

+13 °

Bwlch-derwin, Thursday, 15 October

Rain. High 13°C, low 9°C.

Pressure1018 mb

Wind26 mph S

Humidity67%

Visibility—

Dew point6°C

Fri, 16+7 ° /11 °

+11 °

Bwlch-derwin, Friday, 16 October

Partly cloudy. High 11°C, low 7°C.

Pressure1019 mb

Wind10 mph S

Humidity72%

Visibility—

Dew point6°C

Sat, 17+8 ° /10 °

14.2

+10 °

Bwlch-derwin, Saturday, 17 October

Rain. High 10°C, low 8°C.

Pressure1011 mb

Wind19 mph W

Humidity70%

Visibility—

Dew point5°C

Sun, 18+7 ° /11 °

3.2

+11 °

Bwlch-derwin, Sunday, 18 October

Light rain. High 11°C, low 7°C.

Pressure1026 mb

Wind19 mph SW

Humidity62%

Visibility—

Dew point3°C

Mon, 19+11 ° /14 °

20.3

+14 °

Bwlch-derwin, Monday, 19 October

Rain. High 14°C, low 11°C.

Pressure1009 mb

Wind25 mph SW

Humidity98%

Visibility—

Dew point13°C

Tue, 20+11 ° /14 °

2.9

+14 °

Bwlch-derwin, Tuesday, 20 October

Light rain. High 14°C, low 11°C.

Pressure1013 mb

Wind26 mph NW

Humidity87%

Visibility—

Dew point12°C

Wed, 21+8 ° /9 °

3.5

+9 °

Bwlch-derwin, Wednesday, 21 October

Light rain. High 9°C, low 8°C.

Pressure1009 mb

Wind28 mph NW

Humidity70%

Visibility—

Dew point4°C

Thu, 22+7 ° /8 °

13.1

+8 °

Bwlch-derwin, Thursday, 22 October

Light rain. High 8°C, low 7°C.

Pressure995 mb

Wind25 mph NW

Humidity78%

Visibility—

Dew point4°C

Fri, 23+7 ° /8 °

+8 °

Bwlch-derwin, Friday, 23 October

Light rain. High 8°C, low 7°C.

Pressure1006 mb

Wind25 mph NW

Humidity70%

Visibility—

Dew point3°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+8 ° /12 °

6.7

+12 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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 °

Bwlch-derwin, 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)

Fri, 06+7 ° /11 °

4.6

+11 °

Bwlch-derwin, Friday, 6 November

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

Average high11°C

Average low7°C

Average rainfall4.6 mm

Chance of rain60%

Warmest on record+17° (2025)

Coldest on record+1° (1964)

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 Bwlch-derwin 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 Bwlch-derwin 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.