As of 16:07 BST

Weather in Terfyn

+10°

Terfyn, Wednesday, 7 October, 16:07

Mainly clear. Feels like 9°C. High 12°C, low 9°C.

Pressure1017 mb

Wind13 mph NW

Humidity75%

Visibility6.2 mi

Dew point6°C

Detailed hourly forecast

The month ahead in Terfyn: daytime temperatures averaging +12° and +6.9° overnight — that is 1° below the climate average for October. Rain is expected on 14 days (around 111 mm), against a normal of 8 days and 51 mm. The warmest day should be 12 October (+15.9°), the coolest 18 October (+3.7°).

+12°/+6.9°

Average day / night

−1°

Below average

14 / 8

Wet days / normal

111 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+13°	+13.4°	-0.4°
17 October – 26 October	+10.4°	+12.2°	-1.7°
27 October – 5 November	near average	+11.2°	—

October records over 66 years

+22.7°1 October 1985All-time high

-2.7°31 October 1988All-time low

Climate averages and records are calculated from the nearest reference point — Bethesda (5.8 km away).

Thu, 08+8 ° /14 °

5.4

+14 °

Terfyn, Thursday, 8 October

Rain. High 14°C, low 8°C.

Pressure1024 mb

Wind8 mph NW

Humidity71%

Visibility6.2 mi

Dew point6°C

Fri, 09+9 ° /14 °

19.8

+14 °

Terfyn, Friday, 9 October

Rain. High 14°C, low 9°C.

Pressure1010 mb

Wind14 mph W

Humidity85%

Visibility6.2 mi

Dew point9°C

Sat, 10+8 ° /11 °

9.2

+11 °

Terfyn, Saturday, 10 October

Light rain. High 11°C, low 8°C.

Pressure1011 mb

Wind18 mph W

Humidity84%

Visibility4.3 mi

Dew point7°C

Sun, 11+7 ° /11 °

1.8

+11 °

Terfyn, Sunday, 11 October

Light rain. High 11°C, low 7°C.

Pressure1014 mb

Wind7 mph W

Humidity84%

Visibility6.2 mi

Dew point8°C

Mon, 12+8 ° /16 °

4.1

+16 °

Terfyn, Monday, 12 October

Light rain. High 16°C, low 8°C.

Pressure1008 mb

Wind18 mph S

Humidity96%

Visibility—

Dew point14°C

Tue, 13+9 ° /15 °

12.1

+15 °

Terfyn, Tuesday, 13 October

Rain. High 15°C, low 9°C.

Pressure1021 mb

Wind21 mph S

Humidity75%

Visibility—

Dew point9°C

Wed, 14+9 ° /14 °

0.5

+14 °

Terfyn, Wednesday, 14 October

Light rain. High 14°C, low 9°C.

Pressure1028 mb

Wind13 mph SW

Humidity84%

Visibility—

Dew point11°C

Thu, 15+7 ° /12 °

+12 °

Terfyn, Thursday, 15 October

Rain. High 12°C, low 7°C.

Pressure1018 mb

Wind19 mph S

Humidity95%

Visibility—

Dew point8°C

Fri, 16+5 ° /11 °

+11 °

Terfyn, Friday, 16 October

Overcast. High 11°C, low 5°C.

Pressure1025 mb

Wind7 mph SW

Humidity65%

Visibility—

Dew point4°C

Sat, 17+4 ° /10 °

3.8

+10 °

Terfyn, Saturday, 17 October

Light rain. High 10°C, low 4°C.

Pressure1011 mb

Wind11 mph S

Humidity95%

Visibility—

Dew point7°C

Sun, 18+4 ° /12 °

1.3

+12 °

Terfyn, Sunday, 18 October

Light rain. High 12°C, low 4°C.

Pressure1011 mb

Wind15 mph S

Humidity64%

Visibility—

Dew point2°C

Mon, 19+7 ° /12 °

21.4

+12 °

Terfyn, Monday, 19 October

Rain. High 12°C, low 7°C.

Pressure994 mb

Wind25 mph SW

Humidity77%

Visibility—

Dew point5°C

Tue, 20+7 ° /9 °

11.3

+9 °

Terfyn, Tuesday, 20 October

Light rain. High 9°C, low 7°C.

Pressure995 mb

Wind23 mph SW

Humidity72%

Visibility—

Dew point4°C

Wed, 21+5 ° /9 °

3.2

+9 °

Terfyn, Wednesday, 21 October

Light rain. High 9°C, low 5°C.

Pressure1005 mb

Wind16 mph W

Humidity73%

Visibility—

Dew point4°C

Thu, 22+5 ° /10 °

6.2

+10 °

Terfyn, Thursday, 22 October

Rain. High 10°C, low 5°C.

Pressure1004 mb

Wind8 mph S

Humidity79%

Visibility—

Dew point6°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+8 ° /12 °

2.4

+12 °

Terfyn, Friday, 23 October

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

Average high12°C

Average low8°C

Average rainfall2.4 mm

Chance of rain48%

Warmest on record+18° (1996)

Coldest on record+1° (1997)

Sat, 24+8 ° /12 °

3.5

+12 °

Terfyn, Saturday, 24 October

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

Average high12°C

Average low8°C

Average rainfall3.5 mm

Chance of rain45%

Warmest on record+17° (1995)

Coldest on record0° (2007)

Sun, 25+7 ° /12 °

4.2

+12 °

Terfyn, Sunday, 25 October

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

Average high12°C

Average low7°C

Average rainfall4.2 mm

Chance of rain60%

Warmest on record+17° (2024)

Coldest on record-2° (2010)

Mon, 26+7 ° /12 °

3.3

+12 °

Terfyn, Monday, 26 October

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

Average high12°C

Average low7°C

Average rainfall3.3 mm

Chance of rain47%

Warmest on record+17° (2005)

Coldest on record0° (1997)

Tue, 27+8 ° /12 °

4.2

+12 °

Terfyn, Tuesday, 27 October

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

Average high12°C

Average low8°C

Average rainfall4.2 mm

Chance of rain55%

Warmest on record+20° (2005)

Coldest on record+0° (1962)

Wed, 28+7 ° /12 °

+12 °

Terfyn, Wednesday, 28 October

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

Average high12°C

Average low7°C

Average rainfall4 mm

Chance of rain63%

Warmest on record+16° (2005)

Coldest on record+0° (1997)

Thu, 29+7 ° /11 °

3.4

+11 °

Terfyn, Thursday, 29 October

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

Average high11°C

Average low7°C

Average rainfall3.4 mm

Chance of rain53%

Warmest on record+17° (2009)

Coldest on record-2° (1997)

Fri, 30+7 ° /12 °

3.2

+12 °

Terfyn, Friday, 30 October

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

Average high12°C

Average low7°C

Average rainfall3.2 mm

Chance of rain53%

Warmest on record+16° (2009)

Coldest on record-2° (2018)

Sat, 31+8 ° /12 °

3.9

+12 °

Terfyn, Saturday, 31 October

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

Average high12°C

Average low8°C

Average rainfall3.9 mm

Chance of rain57%

Warmest on record+19° (2014)

Coldest on record-3° (1988)

Sun, 01+7 ° /11 °

4.7

+11 °

Terfyn, Sunday, 1 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 rain58%

Warmest on record+15° (2015)

Coldest on record-1° (1988)

Mon, 02+7 ° /11 °

4.9

+11 °

Terfyn, Monday, 2 November

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

Average high11°C

Average low7°C

Average rainfall4.9 mm

Chance of rain62%

Warmest on record+16° (2005)

Coldest on record0° (1986)

Tue, 03+7 ° /11 °

4.7

+11 °

Terfyn, Tuesday, 3 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 rain60%

Warmest on record+15° (2011)

Coldest on record-2° (2006)

Wed, 04+6 ° /10 °

2.7

+10 °

Terfyn, Wednesday, 4 November

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

Average high10°C

Average low6°C

Average rainfall2.7 mm

Chance of rain55%

Warmest on record+14° (1971)

Coldest on record-2° (1967)

Thu, 05+6 ° /11 °

3.9

+11 °

Terfyn, Thursday, 5 November

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

Average high11°C

Average low6°C

Average rainfall3.9 mm

Chance of rain57%

Warmest on record+17° (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 Terfyn 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 Terfyn 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.