As of 19:18 BST

Weather in Cemmaes

+10°

Cemmaes, Wednesday, 7 October, 19:18

Mainly clear. Feels like 8°C. High 13°C, low 10°C.

Pressure1017 mb

Wind7 mph NW

Humidity100%

Visibility6.2 mi

Dew point9°C

Detailed hourly forecast

The month ahead in Cemmaes: daytime temperatures averaging +12.6° and +6.3° overnight — that is 1° below the climate average for October. Rain is expected on 11 days (around 95 mm), against a normal of 8 days and 58 mm. The warmest day should be 12 October (+15.8°), the coolest 18 October (+3.3°).

+12.6°/+6.3°

Average day / night

−1°

Below average

11 / 8

Wet days / normal

95 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+13.3°	+14.1°	-0.7°
17 October – 26 October	+11.4°	+12.8°	-1.4°
27 October – 5 November	near average	+11.8°	—

October records over 66 years

+24.3°1 October 2011All-time high

-2.9°30 October 2018All-time low

Climate averages and records are calculated from the nearest reference point — Machynlleth (10.6 km away).

Thu, 08+8 ° /15 °

3.3

+15 °

Cemmaes, Thursday, 8 October

Light rain. High 15°C, low 8°C.

Pressure1024 mb

Wind10 mph NW

Humidity68%

Visibility6.2 mi

Dew point6°C

Fri, 09+9 ° /14 °

+14 °

Cemmaes, Friday, 9 October

Heavy rain. High 14°C, low 9°C.

Pressure1010 mb

Wind16 mph W

Humidity97%

Visibility4.4 mi

Dew point12°C

Sat, 10+7 ° /10 °

+10 °

Cemmaes, Saturday, 10 October

Light rain. High 10°C, low 7°C.

Pressure1012 mb

Wind17 mph W

Humidity87%

Visibility6.2 mi

Dew point7°C

Sun, 11+4 ° /11 °

0.7

+11 °

Cemmaes, Sunday, 11 October

Light rain. High 11°C, low 4°C.

Pressure1014 mb

Wind8 mph W

Humidity78%

Visibility6.2 mi

Dew point7°C

Mon, 12+4 ° /16 °

5.5

+16 °

Cemmaes, Monday, 12 October

Light rain. High 16°C, low 4°C.

Pressure1009 mb

Wind13 mph SW

Humidity94%

Visibility—

Dew point13°C

Tue, 13+9 ° /15 °

5.9

+15 °

Cemmaes, Tuesday, 13 October

Rain. High 15°C, low 9°C.

Pressure1021 mb

Wind15 mph SW

Humidity77%

Visibility—

Dew point10°C

Wed, 14+8 ° /15 °

+15 °

Cemmaes, Wednesday, 14 October

Overcast. High 15°C, low 8°C.

Pressure1029 mb

Wind8 mph SW

Humidity73%

Visibility—

Dew point9°C

Thu, 15+5 ° /13 °

2.3

+13 °

Cemmaes, Thursday, 15 October

Light rain. High 13°C, low 5°C.

Pressure1017 mb

Wind8 mph SW

Humidity96%

Visibility—

Dew point12°C

Fri, 16+5 ° /12 °

+12 °

Cemmaes, Friday, 16 October

Overcast. High 12°C, low 5°C.

Pressure1025 mb

Wind4 mph S

Humidity64%

Visibility—

Dew point4°C

Sat, 17+4 ° /13 °

0.8

+13 °

Cemmaes, Saturday, 17 October

Light rain. High 13°C, low 4°C.

Pressure1011 mb

Wind8 mph SW

Humidity79%

Visibility—

Dew point9°C

Sun, 18+3 ° /13 °

0.7

+13 °

Cemmaes, Sunday, 18 October

Light rain. High 13°C, low 3°C.

Pressure1012 mb

Wind11 mph S

Humidity55%

Visibility—

Dew point2°C

Mon, 19+7 ° /13 °

20.4

+13 °

Cemmaes, Monday, 19 October

Rain. High 13°C, low 7°C.

Pressure996 mb

Wind14 mph SW

Humidity88%

Visibility—

Dew point6°C

Tue, 20+6 ° /9 °

10.1

+9 °

Cemmaes, Tuesday, 20 October

Light rain. High 9°C, low 6°C.

Pressure996 mb

Wind13 mph SW

Humidity91%

Visibility—

Dew point6°C

Wed, 21+4 ° /9 °

9.4

+9 °

Cemmaes, Wednesday, 21 October

Rain. High 9°C, low 4°C.

Pressure1006 mb

Wind11 mph W

Humidity77%

Visibility—

Dew point5°C

Thu, 22+6 ° /11 °

7.6

+11 °

Cemmaes, Thursday, 22 October

Rain. High 11°C, low 6°C.

Pressure1006 mb

Wind9 mph SE

Humidity76%

Visibility—

Dew point6°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+8 ° /13 °

2.9

+13 °

Cemmaes, Friday, 23 October

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

Average high13°C

Average low8°C

Average rainfall2.9 mm

Chance of rain53%

Warmest on record+18° (1996)

Coldest on record+1° (1987)

Sat, 24+8 ° /13 °

4.7

+13 °

Cemmaes, Saturday, 24 October

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

Average high13°C

Average low8°C

Average rainfall4.7 mm

Chance of rain47%

Warmest on record+17° (1995)

Coldest on record+2° (2002)

Sun, 25+8 ° /12 °

5.2

+12 °

Cemmaes, Sunday, 25 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 rain58%

Warmest on record+16° (2013)

Coldest on record-1° (2010)

Mon, 26+8 ° /13 °

3.7

+13 °

Cemmaes, Monday, 26 October

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

Average high13°C

Average low8°C

Average rainfall3.7 mm

Chance of rain47%

Warmest on record+17° (2005)

Coldest on record+0° (1997)

Tue, 27+8 ° /13 °

4.8

+13 °

Cemmaes, Tuesday, 27 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 rain53%

Warmest on record+19° (2005)

Coldest on record0° (2003)

Wed, 28+8 ° /12 °

4.8

+12 °

Cemmaes, Wednesday, 28 October

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

Average high12°C

Average low8°C

Average rainfall4.8 mm

Chance of rain58%

Warmest on record+17° (2014)

Coldest on record0° (2019)

Thu, 29+7 ° /12 °

4.1

+12 °

Cemmaes, Thursday, 29 October

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

Average high12°C

Average low7°C

Average rainfall4.1 mm

Chance of rain52%

Warmest on record+18° (2022)

Coldest on record-1° (2018)

Fri, 30+8 ° /12 °

4.4

+12 °

Cemmaes, Friday, 30 October

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

Average high12°C

Average low8°C

Average rainfall4.4 mm

Chance of rain53%

Warmest on record+17° (2015)

Coldest on record-3° (2018)

Sat, 31+8 ° /13 °

5.2

+13 °

Cemmaes, Saturday, 31 October

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

Average high13°C

Average low8°C

Average rainfall5.2 mm

Chance of rain62%

Warmest on record+20° (2014)

Coldest on record0° (1988)

Sun, 01+8 ° /12 °

5.2

+12 °

Cemmaes, Sunday, 1 November

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

Average high12°C

Average low8°C

Average rainfall5.2 mm

Chance of rain58%

Warmest on record+17° (2015)

Coldest on record0° (1988)

Mon, 02+7 ° /12 °

6.1

+12 °

Cemmaes, Monday, 2 November

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

Average high12°C

Average low7°C

Average rainfall6.1 mm

Chance of rain60%

Warmest on record+16° (2005)

Coldest on record+0° (1986)

Tue, 03+7 ° /11 °

4.5

+11 °

Cemmaes, Tuesday, 3 November

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

Average high11°C

Average low7°C

Average rainfall4.5 mm

Chance of rain65%

Warmest on record+16° (2011)

Coldest on record-2° (2006)

Wed, 04+7 ° /11 °

3.1

+11 °

Cemmaes, Wednesday, 4 November

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

Average high11°C

Average low7°C

Average rainfall3.1 mm

Chance of rain47%

Warmest on record+15° (2025)

Coldest on record-1° (1968)

Thu, 05+7 ° /11 °

3.9

+11 °

Cemmaes, Thursday, 5 November

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

Average high11°C

Average low7°C

Average rainfall3.9 mm

Chance of rain47%

Warmest on record+18° (2025)

Coldest on record-1° (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 Cemmaes 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 Cemmaes 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.