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%

--
Nick Gardner
Otter Valley, Devon
20 m amsl
http://www.ottervalleyweather.me.uk