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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) |
| APR | 0.4 | 2.8 | 3.2 | 10.6 | 7.0 | 7.8 | 5.0 | 4.0 | 0.5 | 3.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
44.5
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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 | 44.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
206.4
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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 Thursday 15 Apr 2021 to Saturday 24 Apr 2021: The most likely scenario for the start of this period is for mainly settled conditions to be in place across the country. Unsettled conditions with rain showers may spread erratically from the west at times. The heaviest and most prolonged rain as well as the strongest winds, are most likely for western and north-western areas, with eastern areas likely remaining drier and brighter. Temperatures will likely remain at or slightly below average at first, before recovering to potentially slightly above average for a time over the weekend. Confidence decreases after this, however towards the end of this period it will likely be turning less unsettled with more dry and bright interludes. Generally, it is expected to feel rather warm, although temperatures could be supressed in wetter areas.
UK Outlook for Sunday 25 Apr 2021 to Sunday 9 May 2021: Confidence remains low for this period, however, mixed and slowly evolving weather patterns, typical of spring, are most likely through the late-April into May. Fine and dry weather is likely to be more prevalent overall, especially during late-April, with this signal waning during May, although all areas are likely to see some showers or longer spells of rain at times. Temperatures probably close to average with some warmer spells are possible at times.
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.