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Sunshine Hours
How long has the sun been out today...
Traditionally, the World Meteorological
Organisation, WMO, defines a sunshine hour as “the sum of the time intervals (in
hours) during which the direct normal solar irradiance exceeds a threshold of
120 W/m2”. Recently, the WMO has approved the “pyranometric method” of
calculating sunshine duration from pyranometer measurements (WMO-No. 8, Guide to
Meteorological Instruments). Inside the Mountsorrel & Rothley Weather Station, a
software algorithm calculates sunshine hours by first calculating the 1-second
maximum potential solar radiation possible (clear sky, bright sun) based on the
time and location of the sun proximity to the weather station. If the weather
station' Pyranometer output is greater than 40% of the maximum potential direct solar radiation, then a sun second is recorded. These sun seconds are then totalled up to calculate sun hours per day.
Leicestershire averages 1364 hours of sun a year
Recorded
Sunshine Hours by Month (2019) |
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| 2019 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | TOTAL(hrs) |
| SEP | 8.2 | 4.6 | 6.0 | 4.8 | 6.6 | 3.4 | 5.5 | 6.1 | 0.2 | 4.3 | 4.3 | 4.5 | 9.0 | 8.3 | 3.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
79.0
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| AUG | 3.1 | 4.3 | 6.7 | 4.5 | 4.8 | 5.9 | 4.9 | 8.5 | 0.2 | 3.1 | 5.2 | 7.7 | 9.2 | 0.3 | 7.2 | 0.0 | 7.9 | 6.7 | 6.8 | 6.6 | 5.0 | 4.2 | 7.6 | 10.5 | 9.4 | 7.3 | 5.1 | 2.7 | 5.6 | 5.4 | 5.6 |
172.0
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| JUL | 5.8 | 6.8 | 11.8 | 10.5 | 10.6 | 2.2 | 7.8 | 5.4 | 2.4 | 2.9 | 0.0 | 0.0 | 0.0 | 1.8 | 5.8 | 6.3 | 5.8 | 4.9 | 0.0 | 6.1 | 4.9 | 7.1 | 9.1 | 8.7 | 9.8 | 1.7 | 0.0 | 0.0 | 9.7 | 2.9 | 0.3 |
151.1
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| JUN | 6.9 | 1.5 | 6.4 | 1.6 | 6.0 | 8.6 | 0.9 | 0.7 | 6.7 | 1.1 | 0.0 | 0.0 | 0.8 | 2.4 | 4.6 | 5.5 | 5.2 | 2.2 | 2.1 | 6.0 | 5.7 | 5.2 | 1.5 | 0.0 | 0.0 | 0.0 | 10.8 | 10.2 | 11.5 | 6.1 | 0.0 |
120.2
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| MAY | 3.3 | 4.1 | 0.4 | 5.7 | 2.5 | 1.6 | 3.0 | 0.0 | 0.0 | 2.5 | 4.3 | 8.0 | 10.7 | 10.7 | 10.1 | 6.6 | 0.6 | 0.2 | 2.7 | 3.4 | 10.8 | 0.2 | 12.8 | 8.7 | 8.1 | 5.0 | 2.6 | 4.8 | 3.1 | 7.3 | 4.3 |
148.1
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| APR | 7.9 | 2.3 | 3.7 | 0.4 | 1.8 | 2.7 | 0.6 | 4.6 | 2.7 | 9.4 | 9.0 | 1.3 | 4.2 | 2.0 | 6.2 | 2.4 | 5.6 | 4.9 | 9.8 | 9.9 | 8.9 | 8.6 | 4.1 | 1.9 | 3.8 | 3.5 | 2.3 | 2.6 | 1.7 | 5.6 | 0.0 |
134.4
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Recordred Sunshine Hours by Year |
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| YEAR | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | TOTAL(hrs) |
| 2019 | 0.0 | 0.0 | 0.0 | 134.4 | 148.1 | 120.2 | 151.1 | 172.0 | 79.0 | 0.0 | 0.0 | 0.0 |
804.8
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The Mountsorrel Weather Station is located in Mountsorrel which is just South of Loughborough and just North of Leicester in Leicestershire.
This website is non for profit and is freely maintained by Stormchaser Stuart Robinson whose passion is for all type of weather but especially the more severe types of weather such as Hurricanes, Typhoons and Tornadoes.
Stuart ofterns travels around the globle to experabce severe weather first after seeing hios first tornado on the 9th June 2003.