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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
Sunshine Hours by Month (2024) |
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| 2024 | 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) |
| JAN | 1.3 | 0.9 | 1.7 | 0.7 | 0.0 | 1.6 | 1.3 | 0.0 | 2.5 | 0.9 | 0.2 | 0.0 | 1.6 | 1.2 | 2.5 | 2.7 | 0.9 | 2.5 | 2.8 | 2.1 | 0.7 | 2.0 | 0.3 | 4.0 | 1.9 | 2.9 | 2.8 | 3.1 | 2.2 | 3.8 | 0.5 |
51.6
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| FEB | 3.4 | 4.1 | 1.2 | 0.8 | 2.1 | 2.1 | 1.2 | 0.0 | 0.6 | 1.5 | 1.0 | 5.3 | 0.1 | 1.6 | 1.5 | 3.6 | 3.2 | 5.5 | 3.2 | 2.7 | 0.1 | 1.7 | 3.9 | 6.9 | 6.9 | 3.2 | 5.7 | 2.5 | 0.0 | 0.0 | 0.0 |
75.6
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| MAR | 6.2 | 5.5 | 9.9 | 9.6 | 7.0 | 6.9 | 2.5 | 6.1 | 8.0 | 0.1 | 2.1 | 2.3 | 3.4 | 5.6 | 5.6 | 4.8 | 2.2 | 9.8 | 7.4 | 5.6 | 2.1 | 3.3 | 6.1 | 11.4 | 0.7 | 6.5 | 9.2 | 6.5 | 8.9 | 9.0 | 7.2 |
181.5
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| APR | 7.8 | 9.1 | 6.8 | 4.8 | 10.1 | 11.4 | 8.5 | 8.2 | 5.7 | 7.3 | 10.1 | 9.4 | 5.6 | 6.4 | 5.1 | 7.2 | 9.5 | 5.1 | 2.6 | 8.8 | 6.3 | 6.3 | 6.2 | 4.2 | 6.1 | 6.1 | 7.2 | 8.0 | 10.9 | 14.2 | 0.0 |
225.0
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| MAY | 8.0 | 8.8 | 4.5 | 6.9 | 6.9 | 7.1 | 7.1 | 6.5 | 12.5 | 14.1 | 12.7 | 10.8 | 12.0 | 8.2 | 1.9 | 7.7 | 7.4 | 4.4 | 11.7 | 9.4 | 7.1 | 2.0 | 5.3 | 1.2 | 9.2 | 4.7 | 5.4 | 5.8 | 7.0 | 4.1 | 5.3 |
225.7
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| JUN | 5.0 | 13.2 | 4.5 | 6.0 | 5.2 | 6.6 | 4.8 | 9.0 | 4.1 | 4.2 | 1.3 | 2.2 | 2.3 | 1.9 | 2.8 | 4.1 | 4.4 | 3.5 | 3.0 | 4.4 | 6.1 | 4.0 | 3.7 | 4.1 | 6.3 | 5.9 | 4.2 | 4.4 | 3.4 | 0.9 | 0.0 |
135.5
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| JUL | 1.3 | 1.7 | 1.2 | 5.1 | 2.4 | 2.7 | 4.1 | 2.9 | 0.1 | 1.1 | 0.0 | 2.0 | 1.1 | 1.5 | 2.4 | 0.3 | 4.6 | 6.8 | 5.6 | 0.5 | 4.8 | 2.5 | 3.1 | 2.4 | 0.6 | 4.1 | 3.6 | 5.6 | 7.1 | 5.3 | 6.7 |
93.2
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| AUG | 3.9 | 5.7 | 1.8 | 0.7 | 0.4 | 2.2 | 1.9 | 2.0 | 4.7 | 1.3 | 6.2 | 4.6 | 6.3 | 0.3 | 1.4 | 5.7 | 2.3 | 3.5 | 0.9 | 4.0 | 2.7 | 1.0 | 3.5 | 0.9 | 2.9 | 2.9 | 0.7 | 1.0 | 3.9 | 4.1 | 3.0 |
86.4
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| SEP | 1.7 | 0.2 | 0.4 | 1.9 | 0.0 | 2.7 | 0.0 | 2.7 | 0.7 | 0.5 | 1.8 | 2.7 | 3.3 | 3.6 | 1.6 | 4.4 | 2.2 | 0.7 | 0.3 | 0.1 | 2.2 | 0.0 | 0.0 | 1.9 | 2.3 | 1.4 | 0.7 | 3.4 | 0.4 | 0.0 | 0.0 |
43.8
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| OCT | 0.0 | 0.1 | 3.2 | 2.7 | 1.9 | 0.1 | 2.0 | 1.1 | 0.8 | 1.4 | 3.0 | 0.8 | 1.6 | 0.0 | 0.0 | 0.0 | 2.9 | 1.1 | 0.9 | 0.0 | 0.0 | 1.2 | 1.1 | 1.1 | 0.0 | 0.4 | 2.7 | 0.3 | 0.1 | 0.0 | 0.0 |
30.5
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| NOV | 0.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 1.1 | 0.0 | 2.1 | 1.2 | 0.7 | 0.5 | 1.0 | 0.8 | 0.0 | 1.2 | 0.0 | 1.5 | 0.0 | 0.0 | 1.5 | 1.3 | 0.2 | 0.9 | 0.3 | 0.0 | 0.0 |
14.6
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| DEC | 0.0 | 0.0 | 0.2 | 0.1 | 0.0 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.1 | 0.5 | 0.0 | 0.0 | 0.4 | 0.4 | 0.1 | 0.5 | 0.0 | 0.1 | 0.3 | 0.0 | 0.0 | 0.0 | 0.2 | 0.4 | 0.1 |
5.3
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Sunshine Hours by Year |
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| YEAR | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | TOTAL(hrs) |
| 2025 | 20.0 | 28.5 | 100.1 | 149.4 | 133.4 | 30.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
462.1
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| 2024 | 31.6 | 47.1 | 81.4 | 75.6 | 92.3 | 104.8 | 93.2 | 86.4 | 43.8 | 30.5 | 14.6 | 5.3 |
706.6
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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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Outlook for Wednesday to Friday: Dry with sunny spells Wednesday. Dry at first Thursday, before heavy thundery rain arrives overnight. Further thundery downpours are possible later on Friday. Increasingly very warm or hot and humid.
UK Outlook for Friday 13 Jun 2025 to Sunday 22 Jun 2025: The start of this period is likely to be quite unsettled but also widely warm or very warm and humid, perhaps locally hot in parts of the south and east. Some rain or showers and thunderstorms are likely to affect most parts but there will also be some sunshine. Later in the weekend and into the start of the following week, most parts will become drier but also cooler and fresher. Another brief spell of rain or showers may then affect some parts before high pressure likely builds in more firmly from midweek, and the rest of the following week looks like being mainly dry with variable cloud and some sunshine and mostly warm or very warm. The north may be cloudier with some rain at times though.
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.