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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 | 2.5 | 5.3 | 7.4 | 4.1 | 2.4 | 7.3 | 12.1 | 2.7 | 5.1 | 3.9 | 3.8 | 8.1 | 3.3 | 0.0 | 6.5 | 5.1 | 8.0 | 0.8 | 5.4 | 5.4 | 2.7 | 0.0 | 3.2 | 1.5 | 4.2 | 8.0 | 4.0 | 3.8 | 6.4 | 2.2 | 1.2 |
136.4
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| JUN | 0.3 | 10.3 | 11.4 | 8.7 | 0.9 | 0.0 | 5.3 | 8.8 | 12.0 | 10.3 | 10.5 | 7.3 | 13.2 | 13.2 | 10.8 | 11.7 | 4.0 | 4.4 | 10.5 | 2.4 | 11.2 | 7.8 | 4.0 | 7.2 | 8.8 | 8.2 | 0.0 | 0.3 | 10.0 | 0.9 | 0.0 |
214.4
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| MAY | 7.3 | 3.9 | 10.4 | 7.8 | 7.0 | 1.6 | 5.9 | 0.0 | 2.9 | 5.5 | 4.7 | 0.0 | 2.5 | 5.1 | 8.9 | 7.4 | 5.4 | 5.5 | 3.5 | 9.7 | 11.1 | 7.5 | 5.0 | 12.5 | 7.0 | 11.4 | 12.8 | 3.8 | 7.9 | 0.0 | 0.1 |
184.1
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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 | 2.1 | 8.2 | 4.2 | 1.7 | 1.4 | 5.8 | 5.5 | 0.0 |
205.9
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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 | 57.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
217.7
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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 Sunday 28 Apr 2024 to Tuesday 7 May 2024: An uncertain start to the period though likely unsettled as a frontal system continues to push north across the UK, coupled with strong winds and possible coastal gales, this likely followed by a showery day with potential thunderstorms on Sunday and again on Monday. Beyond this, low pressure patterns continue to dominate with wet weather perhaps more likely to develop in parts of the south and east, though all parts are may see some rain at times. Winds further into the period mostly light to moderate. Temperatures will likely trend near or slightly above average, though some cooler interludes remain possible. Into early May, something of a north-south split looks possible, with relatively drier conditions further to the north and the greatest chance of rain further to the south.
UK Outlook for Wednesday 8 May 2024 to Wednesday 22 May 2024: In this period, the chances of unsettled weather are slightly less than usual in the north and about the same as usual further south. Therefore, some spells of wetter weather are likely for all, but perhaps especially southern areas with the driest conditions probably further north. Temperatures probably near average though with some cooler interludes possible.. Also worth noting that average temperatures themselves rise by around 1C per week at this time of year.
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.