For the first two weeks of August, weather continued where July left off. The middle of the month contained another extreme heat event, before returning to typical August temperatures. The opening fortnight was dominated by the same high pressure that had defined July, particularly across southern parts. Daytime temperatures were high and rainfall was scarce and sunshine was plentiful.
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July 2026 was one of the best months for solar generation the UK has seen in recorded history. The UK recorded 258.7 irradiance hours against a long-term average of around 173 – 149% of normal, with records going back to 1919. England, Wales, Scotland and Northern Ireland all came in well above average.
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Like May, June 2026 solar generation finished in record-breaking fashion after a relatively slow start. During the first two weeks, a westerly Atlantic flow kept dragging cloud and rain across the country, and daily temperatures through much of this period barely reached the high teens.
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May 2026 started poorly for solar generation and finished in record-breaking fashion. The opening two weeks were largely written off in generation terms. Unsettled conditions, persistent cloud cover, occasional heavy showers and below-average temperatures across the UK suppressed output from the start of the month.
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Solar generation in April 2026 started slowly but finished strongly. The first two thirds of the month were poor in generation terms. A succession of Atlantic low pressure systems, including Storm Dave on 4th April, brought persistent cloud cover, heavy rain and high winds across Ireland.
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