Monthly Archives: December 2018

Summary for Autumn 2018

Average temperature, rainfall and sunshine belies a season of contrasts and extremes.

Mean Max: 16.4ºC
Mean Min: 7.7ºC
Mean: 12.1ºC

High Max: 25.9ºC 3 Sep
Low Max: 7.8ºC 20 Nov
High Min: 17.1ºC 13 Oct
Low Min: -4.3ºC 30 Oct
Grass Min: -6.1ºC 30 Oct

Days >25°C 1 Day
Days >20°C 23 Days
Days >15°C 51 Days
Days <10°C 7 Days

Rain Total (gauge): 253.6 mm
Rain Days >0.2 mm: 30 Days
Rain Days >1.0 mm: 26 Days
Max 24 hrs: 25.6 mm 22 Sep
Days without any rain: 60

Air Frost: 6 Days
Grass Frost: 12 Days
Snow Falling: 0 Days
Thunder Heard: 3 Days
Hail <5 mm: 4 Days
Hail >5 mm: 2 Days
Fog @ 9am: 1 Day

Total Autumn Sunshine: 411.8 Hours
Most Sunshine in a Day: 11.3 Hours 26 Sep
Average Daily Sunshine: 4.5 Hours
Sunless Days: 11 Days
Cloudless Days: 13 Days
Total Possible Sunshine: 980 Hours
Percentage of Total Sun: 42%

Summary for November 2018

A little warmer than average but very wet and rather cloudy. Warmest November since 2015 (mean = 11.2C); wettest since 2012 (187 mm); dullest since 2015 (49 hours).

Mean Max: 12.5ºC
Mean Min: 6.9ºC
Mean: 9.7ºC

High Max: 14.7ºC 5th
Low Max: 7.8ºC 20th
High Min: 12.6ºC 16th
Low Min: -2.3ºC 2nd
Grass Min: -4.4ºC 2nd

Days >10°C 24 Days
Days >5°C 30 Days
Nights >10°C 10 Days
Nights <5°C 9 Days

Rain Total (gauge): 150.9 mm
Rain Days >0.2 mm: 15 Days
Rain Days >1.0 mm: 14 Days
Max 24 hrs: 21.4 mm 27th
Days without any rain: 14
Air Frost: 3 Days
Grass Frost: 6 Days
Snow Falling: 0 Days
Thunder Heard: 3 Days
Hail <5 mm: 3 Days
Hail >5 mm: 2 Days
Fog @ 9am: 0 Days

Total Monthly Sunshine: 72.9 Hours
Most Sunshine in a Day: 9.0 Hours 2nd
Average Daily Sunshine: 2.4 Hours
Sunless Days: 7 Days
Cloudless Days: 2 Days
Total Possible Sunshine: 269.6 Hours
Percentage of Total Sun: 27%
Average Sunny Interval: 15.3 mins

Ave 10 Min Wind >39 mph: 0.00 Days
Calm: 4.07 Days 16%
Mean Wind: 5.4 mph
Max Gust: 74 mph 29th

Mean Cloud Cover: 67%
Mean RH @ 9am: 92%
Frost Duration: 18.7 Hours
Air Frost in a Day: 9.0 Hours 2nd

Mean Pressure: 1009.6 hPa
Max Pressure: 1027.5 hPa 2nd
Min Pressure: 986.9 hPa 7th

Max Dewpoint: 13.4ºC 6th
Min Dewpoint: -3.2ºC 2nd
Mean Dewpoint: 7.3ºC

Max Humidity: 100% several days
Min Humidity: 51% 1st
Mean Humidity: 87%