As of 20:27 BST

Weather in Grìanan

+8°

Grìanan, Wednesday, 7 October, 20:27

Overcast. Feels like 6°C. High 11°C, low 4°C.

Pressure1015 mb

Wind7 mph W

Humidity91%

Visibility6.2 mi

Dew point6°C

Detailed hourly forecast

The month ahead in Grìanan: daytime temperatures averaging +11.2° and +7.4° overnight — that is 0.2° below the climate average for October. Rain is expected on 15 days (around 98 mm), against a normal of 9 days and 50 mm. The warmest day should be 14 October (+13.6°), the coolest 7 October (+3.9°).

+11.2°/+7.4°

Average day / night

−0.2°

Below average

15 / 9

Wet days / normal

98 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
7 October – 16 October	+12.1°	+11.7°	+0.4°
17 October – 26 October	+9.7°	+10.8°	-1.1°
27 October – 5 November	near average	+10°	—

October records over 66 years

+18.6°13 October 1990All-time high

+0.3°20 October 1998All-time low

Climate averages and records are calculated from the nearest reference point — Stornoway / Steòrnabhagh (2.9 km away).

Thu, 08+5 ° /12 °

13.7

+12 °

Grìanan, Thursday, 8 October

Rain. High 12°C, low 5°C.

Pressure1017 mb

Wind9 mph S

Humidity66%

Visibility6.2 mi

Dew point4°C

Fri, 09+7 ° /12 °

8.1

+12 °

Grìanan, Friday, 9 October

Rain. High 12°C, low 7°C.

Pressure997 mb

Wind17 mph W

Humidity67%

Visibility6.2 mi

Dew point6°C

Sat, 10+7 ° /11 °

4.5

+11 °

Grìanan, Saturday, 10 October

Light rain. High 11°C, low 7°C.

Pressure998 mb

Wind17 mph NW

Humidity69%

Visibility6.2 mi

Dew point6°C

Sun, 11+7 ° /11 °

0.4

+11 °

Grìanan, Sunday, 11 October

Light rain. High 11°C, low 7°C.

Pressure1011 mb

Wind4 mph NW

Humidity65%

Visibility6.2 mi

Dew point4°C

Mon, 12+8 ° /13 °

4.6

+13 °

Grìanan, Monday, 12 October

Light rain. High 13°C, low 8°C.

Pressure999 mb

Wind19 mph S

Humidity94%

Visibility—

Dew point11°C

Tue, 13+9 ° /13 °

11.6

+13 °

Grìanan, Tuesday, 13 October

Rain. High 13°C, low 9°C.

Pressure1010 mb

Wind23 mph SW

Humidity71%

Visibility—

Dew point6°C

Wed, 14+12 ° /14 °

+14 °

Grìanan, Wednesday, 14 October

Light rain. High 14°C, low 12°C.

Pressure1014 mb

Wind31 mph SW

Humidity88%

Visibility—

Dew point12°C

Thu, 15+8 ° /13 °

4.1

+13 °

Grìanan, Thursday, 15 October

Light rain. High 13°C, low 8°C.

Pressure1005 mb

Wind40 mph S

Humidity70%

Visibility—

Dew point6°C

Fri, 16+9 ° /11 °

1.2

+11 °

Grìanan, Friday, 16 October

Light rain. High 11°C, low 9°C.

Pressure1013 mb

Wind31 mph S

Humidity73%

Visibility—

Dew point6°C

Sat, 17+8 ° /10 °

+10 °

Grìanan, Saturday, 17 October

Rain. High 10°C, low 8°C.

Pressure1000 mb

Wind33 mph S

Humidity63%

Visibility—

Dew point3°C

Sun, 18+8 ° /9 °

2.6

+9 °

Grìanan, Sunday, 18 October

Light rain. High 9°C, low 8°C.

Pressure1003 mb

Wind29 mph SE

Humidity76%

Visibility—

Dew point5°C

Mon, 19+8 ° /10 °

17.4

+10 °

Grìanan, Monday, 19 October

Rain. High 10°C, low 8°C.

Pressure975 mb

Wind33 mph S

Humidity88%

Visibility—

Dew point7°C

Tue, 20+6 ° /9 °

15.3

+9 °

Grìanan, Tuesday, 20 October

Rain. High 9°C, low 6°C.

Pressure982 mb

Wind33 mph S

Humidity71%

Visibility—

Dew point4°C

Wed, 21+7 ° /10 °

2.5

+10 °

Grìanan, Wednesday, 21 October

Light rain. High 10°C, low 7°C.

Pressure994 mb

Wind18 mph S

Humidity70%

Visibility—

Dew point5°C

Thu, 22+6 ° /9 °

3.8

+9 °

Grìanan, Thursday, 22 October

Rain. High 9°C, low 6°C.

Pressure999 mb

Wind20 mph SE

Humidity70%

Visibility—

Dew point4°C

Days 17 onward are based on 60-year climate statistics

Fri, 23+8 ° /11 °

3.8

+11 °

Grìanan, Friday, 23 October

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

Average high11°C

Average low8°C

Average rainfall3.8 mm

Chance of rain60%

Warmest on record+15° (1996)

Coldest on record+3° (1964)

Sat, 24+7 ° /11 °

3.4

+11 °

Grìanan, Saturday, 24 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 rain60%

Warmest on record+15° (1995)

Coldest on record+2° (2002)

Sun, 25+7 ° /10 °

4.4

+10 °

Grìanan, Sunday, 25 October

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

Average high10°C

Average low7°C

Average rainfall4.4 mm

Chance of rain57%

Warmest on record+14° (1975)

Coldest on record+1° (1992)

Mon, 26+7 ° /11 °

4.1

+11 °

Grìanan, Monday, 26 October

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

Average high11°C

Average low7°C

Average rainfall4.1 mm

Chance of rain60%

Warmest on record+14° (2005)

Coldest on record+2° (1962)

Tue, 27+7 ° /11 °

3.8

+11 °

Grìanan, Tuesday, 27 October

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

Average high11°C

Average low7°C

Average rainfall3.8 mm

Chance of rain73%

Warmest on record+17° (2005)

Coldest on record+1° (1970)

Wed, 28+7 ° /10 °

3.4

+10 °

Grìanan, Wednesday, 28 October

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

Average high10°C

Average low7°C

Average rainfall3.4 mm

Chance of rain65%

Warmest on record+16° (2005)

Coldest on record+0° (2008)

Thu, 29+7 ° /10 °

3.5

+10 °

Grìanan, Thursday, 29 October

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

Average high10°C

Average low7°C

Average rainfall3.5 mm

Chance of rain50%

Warmest on record+14° (2009)

Coldest on record+2° (1962)

Fri, 30+7 ° /11 °

5.1

+11 °

Grìanan, Friday, 30 October

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

Average high11°C

Average low7°C

Average rainfall5.1 mm

Chance of rain73%

Warmest on record+15° (2009)

Coldest on record+2° (1990)

Sat, 31+8 ° /10 °

4.4

+10 °

Grìanan, Saturday, 31 October

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

Average high10°C

Average low8°C

Average rainfall4.4 mm

Chance of rain63%

Warmest on record+15° (2014)

Coldest on record+3° (2019)

Sun, 01+7 ° /10 °

3.2

+10 °

Grìanan, Sunday, 1 November

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

Average high10°C

Average low7°C

Average rainfall3.2 mm

Chance of rain65%

Warmest on record+14° (2007)

Coldest on record+3° (2003)

Mon, 02+7 ° /10 °

+10 °

Grìanan, Monday, 2 November

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

Average high10°C

Average low7°C

Average rainfall3 mm

Chance of rain50%

Warmest on record+14° (1971)

Coldest on record+1° (1998)

Tue, 03+7 ° /10 °

3.3

+10 °

Grìanan, Tuesday, 3 November

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

Average high10°C

Average low7°C

Average rainfall3.3 mm

Chance of rain63%

Warmest on record+14° (2011)

Coldest on record+2° (1985)

Wed, 04+6 ° /10 °

+10 °

Grìanan, Wednesday, 4 November

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

Average high10°C

Average low6°C

Average rainfall3 mm

Chance of rain60%

Warmest on record+13° (1978)

Coldest on record+2° (1968)

Thu, 05+6 ° /9 °

2.7

+9 °

Grìanan, Thursday, 5 November

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

Average high9°C

Average low6°C

Average rainfall2.7 mm

Chance of rain53%

Warmest on record+14° (2003)

Coldest on record+1° (2017)

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 Grìanan 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 Grìanan 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.