Updated: 2026-07-31
The hottest July day in the official record for the area around London reached 38.8°C maximum temperature on 19 July 2022. That date, 2022-07-19, marks the absolute peak of the July series at the station that serves as the closest measuring point to the capital. No other July day in the period analysed has gone higher.
The point of measurement closest to London is the high-beach station in the province of Essex, situated at an altitude of 110 m, at a distance of about 20.8 km from the city centre. These are its official historical records. Because London sits near a large river and spreads across varied terrain, its actual local climate can differ from what this station registers — but when we ask what the hottest July on record is for the London area, this is the best reference available from the Met Office archive.
That 38.8°C reading on 19 July 2022 stands out not just as a number on a page but as a genuinely extreme day. It arrived during a week when much of southern England was under a severe heat warning, and it represents the kind of temperature that was essentially unheard of in the region for decades. The fact that it took until 2022 to be set is a reminder of how unusual it is — and how the July record at this station has been broken only rarely across the nearly five decades covered by this series.
What makes the 38.8°C figure especially striking is the context of the station itself. high-beach, at 110 m of altitude, is not a location known for extreme heat spikes like some inland valleys or enclosed basins. It sits in Essex, relatively open to weather systems moving in from the continent or the Atlantic. That a reading this high was registered there suggests the scale of the heat event on 19 July 2022. It was not a localised anomaly in a sheltered spot; it was a broad, powerful episode that covered much of the southeast.
For anyone planning outdoor events in London in July, or for researchers tracking how summer extremes are evolving, the 2022 record is the benchmark. The series begins in 1978, which means the record covers more than four decades of Julys — and none of them produced a day as hot as 19 July 2022. That longevity gives the record real weight: it is not a recent blip in a short dataset but the peak of a long, consistent observational record.
The Met Office daily series for high-beach records the maximum temperature for each day. The July maximum for the entire period was logged on 2022-07-19 with a value of 38.8°C. That is the single highest July temperature in the station's history from 1978 to the end of 2025. The table below shows the essential fact of the record in plain form.
| July record maximum temperature | Date |
|---|---|
| 38.8 | 2022-07-19 |
The dataset for high-beach spans from 1978-08-01 to 2025-12-31. That is the period for which daily records are available at this station, and it defines the scope of the July analysis. Every July within those years has been scanned, and the maximum of 38.8°C on 19 July 2022 is what came out on top.
Because the earliest date in the series is 1 August 1978, the July record technically begins with the July of 1979 — the first full July in the record. That means the record of 38.8°C beats every July day from 1979 through 2025, a sweep of more than four decades of summer heat. It is a recent record, set only a few years before the end of the series, and it has held since.
For a city that is not historically associated with extreme heat, a July day at 38.8°C is a major event. It changes expectations. Anyone who lived through 19 July 2022 in the London area will remember the sense of intensity — the kind of heat that affects transport, health services, and daily routines. The fact that this is the hottest July day in the official record, measured at the closest station, gives that experience a concrete historical dimension.
This is also why it is worth checking the data rather than relying on memory. The 38.8°C figure is the literal maximum from the Met Office archive, not an estimate or a recollection. It is the number that future Julys will be measured against, and it is the reference point for any discussion of how summer extremes in the London area are changing.
It should also be noted that the record is specific to this station. If future urban development, local conditions, or very localised weather systems produce even higher temperatures in London itself, those would not appear in this series unless they are also captured at high-beach. But as things stand, the official Met Office data for the closest measuring point to London says this: the hottest July day on record is 38.8°C, set on 19 July 2022.
Source: Met Office — high-beach station, Essex. Period covered: 1978–2025.
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