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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 | 9.9 | 7.3 | 7.4 | 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 |
152.4
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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 | 47.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
479.0
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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 Saturday to Monday: Area of rain and heavy thundery showers clears northward Saturday morning, further showers during the afternoon. Sunday likely seeing showers and sunny spells, Monday drier. Temperatures cooling over the weekend.
UK Outlook for Monday 16 Jun 2025 to Wednesday 25 Jun 2025: On Monday, cloudy with spells of rain still holding on across Scotland and Northern Ireland. Further south, high pressure to the southwest of the UK will extend northeastwards, bringing settled and fair weather mainly across England and Wales. Cloud and rain will eventually ease across western Scotland and Northern Ireland, and the weather should turn drier and brighter across eastern Scotland where sheltered by high ground. From mid week, high pressure is signalled to dominate much of the UK, bringing dry and fine weather, and feeling warm in the sunshine with light winds for most. Any early morning mist or fog will be quick to clear, and daytime temperature will likely trend around or above normal for the 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.