Monthly average daily sun hours in the United Kingdom (UK) 2015-2020

During this period, both January and December had consistently lower average daily sun hours than any other months each year. The highest daily sun hours recorded since 2015 was in July of 2018, at an average of 8.8 hours per day. This was an increase of 2.6 hours per day when compared to the 10-year mean for this month.

High levels of monthly sunlight in 2018

  Since 2014, the pattern of monthly hours of sunlight remained relatively similar up until 2018. In this year there was a noticeable increase in sunlight hours in May, June and July, with May recording 246 hours of sunlight. The following year the pattern returned to normal.

Annual sun hours

The average annual number of daily sun hours in the UK has remained above 4 hours per day since 2001 but has not increased above 5. Daily sun hours were highest in 2003 at 4.9 hours per day. The following years saw sun hours remain at a similar level, until an increase to 4.7 hours in 2018.

Monthly average daily sun hours in the United Kingdom (UK) from 2015 to 2020

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Source

Release date

March 2020

Region

United Kingdom

Survey time period

2015 to 2020

Special properties

weighted by location of UK solar PV resources

Supplementary notes

* Provisional data

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Statistics on "Weather in the UK"

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