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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 (2021) |
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| 2021 | 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 | 0.0 | 0.7 | 0.8 | 0.3 | 6.5 | 7.3 | 9.3 | 8.9 | 3.9 | 1.4 | 4.0 | 1.8 | 1.8 | 0.0 | 1.4 | 3.6 | 3.0 | 4.0 | 1.5 | 4.4 | 6.8 | 7.0 | 6.3 | 2.5 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
88.2
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| AUG | 2.5 | 2.6 | 3.8 | 6.7 | 3.9 | 4.2 | 5.0 | 3.6 | 3.2 | 4.3 | 4.7 | 10.0 | 4.9 | 3.1 | 4.0 | 3.1 | 0.5 | 0.5 | 2.4 | 3.8 | 0.1 | 2.0 | 7.3 | 0.3 | 0.0 | 2.0 | 0.0 | 3.8 | 0.1 | 0.0 | 0.6 |
93.0
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| JUL | 6.8 | 5.1 | 1.7 | 3.0 | 4.8 | 3.0 | 3.4 | 2.0 | 4.5 | 5.5 | 4.6 | 2.2 | 2.4 | 10.9 | 5.8 | 10.3 | 8.5 | 0.0 | 0.6 | 1.6 | 7.9 | 9.7 | 0.9 | 3.7 | 3.5 | 7.2 | 1.5 | 3.1 | 8.5 | 0.9 | 1.8 |
135.4
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| JUN | 11.3 | 9.4 | 6.0 | 3.2 | 11.3 | 4.0 | 5.5 | 13.0 | 10.4 | 2.6 | 4.4 | 10.2 | 10.4 | 8.9 | 12.5 | 11.6 | 1.4 | 0.0 | 1.7 | 1.3 | 1.1 | 7.3 | 11.7 | 1.1 | 0.7 | 2.9 | 0.2 | 0.0 | 3.0 | 3.3 | 0.0 |
170.4
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| MAY | 5.0 | 5.8 | 0.8 | 3.7 | 9.3 | 6.6 | 5.8 | 0.0 | 5.2 | 5.2 | 4.3 | 7.9 | 2.1 | 0.8 | 1.2 | 4.9 | 4.8 | 5.2 | 9.1 | 0.1 | 0.3 | 3.1 | 3.7 | 5.2 | 5.0 | 3.1 | 5.0 | 9.0 | 8.3 | 10.7 | 8.7 |
149.9
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| APR | 0.4 | 2.8 | 3.2 | 10.6 | 7.0 | 7.8 | 5.0 | 4.0 | 0.5 | 3.7 | 6.3 | 9.0 | 9.2 | 8.6 | 6.8 | 3.8 | 11.7 | 11.6 | 12.3 | 8.7 | 6.2 | 12.3 | 11.8 | 11.8 | 7.5 | 10.1 | 0.3 | 5.1 | 5.1 | 6.9 | 0.0 |
210.1
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| MAR | 0.0 | 0.0 | 0.0 | 0.3 | 0.1 | 0.0 | 5.5 | 2.0 | 4.0 | 0.0 | 3.9 | 4.8 | 2.9 | 1.4 | 1.9 | 1.5 | 3.0 | 1.3 | 0.2 | 0.5 | 3.2 | 2.6 | 1.9 | 4.6 | 5.5 | 2.6 | 3.7 | 0.7 | 5.0 | 9.6 | 9.4 |
82.1
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| FEB | 2.9 | 0.5 | 0.1 | 0.2 | 0.9 | 0.8 | 0.1 | 0.9 | 1.9 | 4.3 | 4.7 | 2.9 | 3.8 | 0.0 | 2.3 | 0.6 | 1.6 | 2.7 | 0.0 | 0.1 | 0.7 | 0.8 | 2.9 | 2.3 | 4.5 | 5.5 | 6.2 | 6.8 | 0.0 | 0.0 | 0.0 |
61.0
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| JAN | 0.2 | 1.1 | 0.3 | 0.5 | 2.0 | 0.3 | 1.7 | 0.0 | 0.1 | 0.5 | 0.1 | 0.2 | 0.0 | 0.0 | 0.0 | 0.1 | 1.7 | 0.0 | 0.0 | 0.0 | 1.1 | 2.2 | 1.0 | 0.0 | 2.1 | 0.3 | 0.2 | 0.8 | 1.2 | 0.0 | 1.1 |
18.8
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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) |
| 2021 | 18.8 | 61.0 | 82.1 | 210.1 | 149.9 | 170.4 | 135.4 | 93.0 | 88.2 | 0.0 | 0.0 | 0.0 |
1008.9
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| 2020 | 29.2 | 69.8 | 133.8 | 232.5 | 258.3 | 152.7 | 149.5 | 143.2 | 156.3 | 44.0 | 34.5 | 14.6 |
1418.4
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| 2019 | 0.0 | 0.0 | 0.0 | 134.4 | 148.1 | 120.2 | 151.1 | 172.0 | 141.9 | 76.4 | 24.5 | 19.5 |
988.1
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Outlook for Tuesday to Thursday: Showers or longer spells of rain on Tuesday after a fine and dry start. Wednesday windy with rain or showers clearing east, then further patchy rain spreading east later Thursday.
UK Outlook for Thursday 30 Sep 2021 to Saturday 9 Oct 2021: A low pressure system will cross the country at the start of this period, bringing heavy rain and isolated thunderstorms for all. Thereafter, further low pressure systems will affect the UK, particularly northwestern areas. This will bring organised bands of rain, heavy at times, interspersed with cooler and showery periods but some sunny spells too. Drier and more settled conditions are likely across southern and eastern parts of the country, but there is still a chance that bands of rain and strong winds from the north and west could extend into these areas. The temperatures are most likely to be slightly below average for this time of the year during the start of the period, but will gradually return to near average later.
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.