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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) |
| DEC | 1.1 | 1.9 | 0.3 | 1.5 | 0.0 | 0.2 | 1.5 | 1.4 | 1.8 | 0.0 | 0.8 | 0.0 | 0.1 | 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 | 0.0 | 0.0 |
10.6
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| NOV | 0.0 | 0.8 | 1.5 | 2.6 | 0.0 | 0.5 | 0.0 | 2.2 | 0.4 | 2.0 | 1.9 | 0.5 | 2.3 | 0.0 | 0.1 | 0.7 | 0.0 | 1.6 | 0.6 | 2.3 | 0.0 | 0.6 | 0.0 | 0.1 | 0.0 | 0.4 | 0.5 | 0.0 | 2.2 | 0.7 | 0.0 |
24.5
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| OCT | 0.0 | 6.8 | 1.1 | 1.1 | 0.4 | 3.4 | 0.0 | 5.1 | 4.9 | 3.6 | 0.6 | 2.9 | 0.7 | 0.0 | 0.1 | 3.1 | 3.7 | 2.7 | 2.9 | 2.3 | 1.0 | 3.9 | 1.8 | 0.3 | 0.2 | 0.0 | 5.7 | 4.8 | 5.4 | 4.5 | 3.4 |
76.4
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| 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 | 1.6 | 8.1 | 6.6 | 8.4 | 7.7 | 8.0 | 0.3 | 5.5 | 0.3 | 2.6 | 5.0 | 1.5 | 1.3 | 0.9 | 5.1 | 0.0 |
141.9
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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 | 141.9 | 76.4 | 24.5 | 10.6 |
979.2
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Outlook for Sunday to Tuesday: Sunshine and showers Sunday with strong winds. Drier and clearer on Monday with sunshine, but still the risk of a shower. Dry Tuesday with sunny spells and winds easing.
UK Outlook for Tuesday 17 Dec 2019 to Thursday 26 Dec 2019: A less windy interlude is likely for many at the start of next week with longer drier, brighter spells but also night frost and patchy fog. However, there may be further rain in the southeast on Tuesday, perhaps extending further north. From mid-week it will turn milder and unsettled again as further bands of rain and strong winds edge in from the west, after which unsettled and sometimes windy conditions will probably last for the rest of the period. Most of the rain will probably be in the west with drier spells more likely in the east and southeast. Snow may occur at times in the north, mainly on high ground. There remains a chance of brief drier, colder interludes, with an increased risk of frost and fog.
Mountsorrel is a village in Leicestershire on the River Soar, just south of Loughborough with a population of 6,662 inhabitants. A castle was built in 1080 by Hugh Lupus, but there is evidence of an earlier Norman settlement in the area in the form
of pottery fragments. A Roman villa is supposed to have existed on Broad Hill during the 4th century AD, the site of today's quarry, as quarrying during the late 1800s revealed many artefacts including a preserved wooden bucket. However, the first recording of the village was in 1377, when it had a population of 156.
The Mountsorrel Weather Station is located in Mountsorrel which is just South of Loughborough andjust North of Leicester, 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 oftens travels the globle to experabce severe weather first after seeing his first tornado outside a town called Stuart in Nebraska, USA on the 9th June 2003.