Last Full Update: 02 Aug 2026, 10:10 BSTUpdated: 02 Aug 26 10:10
Data Charts – Mean Temperature
Variable
Measure
Timescale
Aggregation
Period
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Data from before 2009 are mostly from the historical site at Whitestone Pond, Hampstead; where missing, nearby sites (St James's Park, Heathrow, Kew) were used, adjusted for site differences. Source: Met Office MIDAS Open.
Mean air temperature for the day (midnight to midnight, local time), averaged from the logged readings.