Summary for January 2010

A very cold and often quite wet month with some snowfall.

Two days with snow falling (6th & 10th). Very wet and quite windy on the
16th with 38.9 mm of rain. A station record 'grass' minimum of -15.8°C (on
top of snow) on the 7th. Very clear skies on the 30th led to an
exceptionally sunny January day with 8.8 hours of sunshine, which is 96% of
the total possible.

Mean Max: 4.9ºC (-3.5ºC)*
Mean Min: -1.1ºC (-3.8ºC)
Mean: 1.9ºC (-3.7ºC)

High Max: 10.7ºC 16th
Low Max: -0.7ºC 7th
High Min: 7.7ºC 22nd
Low Min: -10.7ºC 7th
Grass Min: -15.8ºC 7th

Rain Total (gauge): 102.8 mm (118%)
Rain Total (tipping bucket): 88.1 mm
Rain Days 0.2 mm: 9 Days
Rain Days 1.0 mm: 7 Days
Max 24 hrs: 38.9 mm 16th
Days without any rain: 22

Air Frost: 16 Days
Ground Frost: 24 Days
Snow Falling: 2 Days
Snow (50%) @ 9am: 6 Days
Thunder Heard: 0 Days
Hail 5 mm: 0 Days
Hail 5 mm: 0 Days
Fog @ 9am: 1 Day

Total Monthly Sunshine: 88.5 Hours
Most Sunshine in a Day: 08h:45m 30th
Average Daily Sunshine: 02h:51m
Sunless Days: 4 Days
Cloudless Days: 8 Days
Total Possible Sunshine: 264h:53m
Percentage of Total Sun: 34%

Mean Soil Temp @ 30 cm: 2.6ºC
Mean Soil Temp @ 100 cm: 4.8ºC

Mean Wind: 3.4 mph
Max Gust: 37 mph 16th

Mean Cloud Cover: 73%
Mean RH @ 9am: 88%
Rain Duration 0.1mm/hour: 50.0 Hours
Frost Duration: 238.3 Hours
Max Frost Duration in a Day: 24.0 Hours 7th

Mean Pressu 1015.5 hPa (+0.2 hPa)
Max Pressu 1041.6 hPa 26th
Min Pressu 992.1 hPa 29th

Max Dewpoint: 9.2ºC 16th
Min Dewpoint: -13.0ºC 7th
Mean Dewpoint: -0.7ºC

Max Humidity: 93% 15th
Min Humidity: 61% 30th
Mean Humidity: 86% (-0)

*Anomalies are sort of experimental.
_____________________
Nick
Otter Valley, Devon
83 m amsl
http://www.ottervalley.co.uk