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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) |
DEC | 0.2 | 0.0 | 0.0 | 0.0 | 0.4 | 0.3 | 0.0 | 1.2 | 0.0 | 0.5 | 1.1 | 0.3 | 0.0 | 0.6 | 0.0 | 0.9 | 0.0 | 0.1 | 0.0 | 0.5 | 0.7 | 0.0 | 0.3 | 0.1 | 0.2 | 1.0 | 0.0 | 0.2 | 0.2 | 0.0 | 0.8 |
9.6
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NOV | 2.1 | 0.5 | 2.9 | 0.0 | 1.5 | 3.7 | 3.0 | 0.0 | 1.6 | 2.0 | 3.8 | 0.0 | 2.1 | 0.2 | 3.1 | 0.0 | 2.1 | 0.0 | 0.1 | 1.0 | 0.5 | 0.1 | 2.0 | 1.4 | 2.4 | 0.0 | 0.0 | 2.1 | 2.3 | 1.9 | 0.0 |
42.4
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OCT | 0.1 | 1.5 | 4.7 | 3.3 | 0.8 | 3.7 | 4.0 | 3.0 | 3.9 | 5.3 | 0.8 | 0.4 | 0.0 | 4.3 | 5.7 | 2.7 | 5.1 | 0.5 | 1.2 | 0.0 | 0.3 | 3.9 | 1.9 | 0.8 | 2.5 | 0.3 | 0.0 | 0.8 | 3.6 | 2.9 | 0.6 |
68.6
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SEP | 1.2 | 6.2 | 9.0 | 10.5 | 8.0 | 5.8 | 8.6 | 6.1 | 7.8 | 2.4 | 3.4 | 0.0 | 6.5 | 0.0 | 6.8 | 2.0 | 2.9 | 2.8 | 0.0 | 0.0 | 5.9 | 5.3 | 4.1 | 1.6 | 6.8 | 3.0 | 0.6 | 1.1 | 6.2 | 2.1 | 0.0 |
126.7
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AUG | 1.4 | 2.7 | 5.5 | 3.2 | 0.0 | 6.3 | 7.6 | 2.5 | 9.0 | 11.0 | 6.6 | 4.5 | 3.0 | 1.7 | 7.1 | 10.4 | 6.9 | 1.9 | 6.5 | 7.0 | 7.2 | 5.7 | 6.0 | 6.7 | 5.0 | 3.4 | 3.2 | 4.9 | 2.1 | 6.0 | 3.6 |
158.6
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JUL | 3.8 | 7.0 | 8.6 | 9.2 | 4.8 | 10.0 | 16.2 | 5.6 | 5.2 | 5.0 | 3.8 | 10.1 | 4.4 | 1.5 | 8.9 | 5.4 | 12.6 | 7.6 | 11.0 | 5.9 | 7.5 | 2.5 | 6.3 | 3.9 | 4.8 | 12.1 | 6.9 | 3.8 | 6.4 | 2.2 | 1.2 |
204.2
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JUN | 1.3 | 18.3 | 12.7 | 9.4 | 4.8 | 3.3 | 8.6 | 13.6 | 14.2 | 13.7 | 11.8 | 9.5 | 15.5 | 15.1 | 13.6 | 15.8 | 8.4 | 7.9 | 13.5 | 6.8 | 17.3 | 11.8 | 7.7 | 11.3 | 15.1 | 14.1 | 4.2 | 4.7 | 13.4 | 1.8 | 0.0 |
319.2
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MAY | 8.6 | 8.3 | 10.4 | 12.0 | 10.5 | 6.3 | 8.6 | 6.3 | 8.9 | 12.8 | 10.4 | 3.7 | 6.3 | 5.7 | 10.6 | 7.4 | 9.2 | 7.5 | 11.2 | 13.8 | 11.2 | 7.9 | 5.0 | 13.1 | 12.9 | 14.2 | 17.1 | 5.6 | 9.7 | 0.9 | 0.3 |
276.4
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APR | 1.7 | 6.8 | 9.3 | 11.4 | 4.9 | 9.1 | 12.2 | 8.8 | 4.4 | 4.3 | 7.8 | 9.8 | 10.8 | 4.6 | 7.2 | 4.3 | 7.5 | 13.6 | 6.4 | 15.8 | 6.8 | 7.6 | 1.9 | 4.3 | 9.3 | 7.1 | 1.8 | 2.7 | 9.4 | 12.3 | 0.0 |
223.9
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MAR | 2.5 | 2.2 | 5.5 | 5.1 | 2.3 | 3.2 | 4.7 | 1.5 | 2.3 | 2.9 | 4.7 | 5.2 | 1.8 | 6.1 | 6.7 | 4.2 | 5.3 | 4.6 | 3.8 | 1.4 | 3.2 | 8.4 | 10.8 | 14.1 | 3.4 | 4.9 | 8.6 | 3.0 | 4.0 | 9.5 | 0.9 |
146.8
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FEB | 5.1 | 2.8 | 2.8 | 0.1 | 5.1 | 5.5 | 6.4 | 5.0 | 5.9 | 3.3 | 2.2 | 5.3 | 3.2 | 2.4 | 5.9 | 3.3 | 2.2 | 2.1 | 8.9 | 9.0 | 0.4 | 0.4 | 7.9 | 7.2 | 6.6 | 5.9 | 4.0 | 0.1 | 0.0 | 0.0 | 0.0 |
119.0
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JAN | 2.7 | 0.7 | 0.7 | 0.8 | 0.1 | 2.6 | 0.2 | 1.5 | 2.1 | 0.6 | 1.4 | 0.0 | 3.1 | 1.0 | 4.1 | 2.8 | 2.8 | 3.7 | 4.0 | 2.4 | 2.5 | 2.7 | 1.4 | 5.2 | 0.1 | 3.1 | 0.6 | 3.2 | 1.7 | 4.6 | 3.4 |
65.8
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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) |
2024 | 31.6 | 47.1 | 81.4 | 75.6 | 92.3 | 104.8 | 67.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
500.6
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2023 | 34.2 | 71.9 | 65.4 | 148.3 | 184.1 | 214.4 | 136.4 | 158.6 | 126.7 | 68.6 | 42.4 | 9.6 |
1260.6
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2022 | 31.9 | 46.9 | 133.6 | 172.3 | 168.4 | 173.9 | 192.1 | 211.4 | 93.8 | 85.4 | 23.5 | 17.4 |
1350.6
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2021 | 18.8 | 61.0 | 82.1 | 210.1 | 149.9 | 170.4 | 135.4 | 93.0 | 100.7 | 63.4 | 28.0 | 6.1 |
1118.9
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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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UK Outlook for Wednesday 31 Jul 2024 to Friday 9 Aug 2024: The end of July and into early August will typically be dominated by a northwest-southeast split. North-western areas will probably experience rather breezy conditions with cloud and some outbreaks of rain or drizzle as weakening Atlantic frontal systems attempt to push eastwards across the UK. Toward the south and east it will tend to be drier and brighter much of the time, although there is also the small possibility of some thundery showers spreading in from the nearby continent at times. Temperatures during this period will probably be close to or slightly above average overall, with the likelihood of some very warm conditions developing in the south and perhaps parts of the east at times.
UK Outlook for Saturday 10 Aug 2024 to Saturday 24 Aug 2024: No single weather type is expected to dominate through this period. Some spells of dry, settled weather will likely alternate with wetter, cloudier conditions at times. The wettest conditions will probably be in the northwest, with the southeast tending to be driest. Through the period as a whole, warmer than average conditions are more probable, perhaps with some short-lived hot spells.
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.