Monthly Archives: April 2018

A fine Spring day even with a CF passing through

A cold front moved through here at around 14:30, but all it produced was a thinning band of broken cloud and a sudden shift in wind direction from S to to NW, and a drop in humidity.

Other than that it has been a day of lengthy sunny intervals and a maximum of 19.0C.

A lovely evening with excellent visibility and just a few cumulus here and there.

This April’s mean temperature (11.1C) is now running at nearly 2C above my eLTA and passed 100 hours of sunshine today. Vines are in leaf burst, so better not get a frost!

April warmth

There was a layer of sea fog out in Lyme Bay but it stayed far out and didn’t come anywhere near to spoil another day of unbroken sunshine and much warmer that yesterday.

A maximum of 25.2C at 12:50 then a light sea breeze sprung up and the temperature fell back to around 22C, and that’s where it stayed all afternoon.

Today was the warmest April day since 26.8C on the 23rd in 2011. What is so remarkable about today’s warmth was that if the sea breeze had failed it would have been a couple of degrees higher than that, and also today’s warmth comes after a very long run with a complete absence of any warm days. In 2011, the heat on the 23rd came after two weeks of steadily building heat and dry weather.

Loads of sunburnt people about this afternoon and yet the UV didn’t seem that high, I recorded a UV maximum of only 5.2 which is around normal for this date.

Summary for March 2018

A rather remarkable month after the relatively benign conditions through the winter. The dullest, wettest and snowiest March in my record. In fact it was the snowiest of any month and put December 2010 to shame. The 2nd coldest March after 2013 (5.2C) and the first ‘ice day’ on the 1st since the 25th December 2010. A very high amount of sunless days and no cloudless days!

Mean Max: 9.4ºC
Mean Min: 2.5ºC
Mean: 6.0ºC

High Max: 14.8ºC 10th
Low Max: -1.7ºC 1st
High Min: 9.1ºC 10th
Low Min: -4.4ºC 1st

Grass Min: -5.6ºC 1st
Days >10°C 16 Days
Days >5°C 27 Days
Nights >10°C 0 Days
Nights >5°C 11 Days

Rain Total (gauge): 179.3 mm
Rain Days >0.2 mm: 21 Days
Rain Days >1.0 mm: 19 Days

Air Frost: 10 Days
Grass Frost: 19 Days
Snow Falling: 6 Days
Snow (50%) @ 9am: 4 Days
Ice Days: 1 Day
Thunder Heard: 0 Days
Hail <5 mm: 1 Day
Hail >5 mm: 0 Days
Fog @ 9am: 1 Day

Total Monthly Sunshine: 89.3 Hours
Most Sunshine in a Day: 9.8 Hours 8th
Average Daily Sunshine: 2.9 Hours
Sunless Days: 9 Days
Cloudless Days: 0 Days
Total Possible Sunshine: 369.1 Hours
Percentage of Total Sun: 24%
Average Sunny Interval: 15.2 mins

Ave 10 Min Wind >39 mph: 0.00 Days
Calm: 4.52 Days 15%
Mean Wind: 4.1 mph
Max Gust: 30 mph 29th

Mean Pressure: 1000.5 hPa
Max Pressure: 1034.7 hPa 21st
Min Pressure: 981.9 hPa 5th

Max Dewpoint: 12.0ºC 10th
Min Dewpoint: -8.3ºC 1st
Mean Dewpoint: 3.5ºC

Max Humidity: 100% Several days
Min Humidity: 49% 8th
Mean Humidity: 85%