London is poised for a short return to warmer weather after weeks of cooler conditions, with the Met Office forecasting temperatures to climb to roughly 25C in the capital on Monday. The warmer spell is expected to bring sunshine interspersed with the odd shower but will not meet the technical definition of a heatwave.
What the Met Office is saying
Forecasters say the brief uptick in temperature will bring a taste of late-summer warmth, but it is unlikely to persist. The Met Office notes that for an event to be classed as a heatwave, qualifying temperatures must be exceeded for three consecutive days, and the threshold varies across the UK. In London the standard is higher than in much of the rest of Britain.
“The conditions we’ve seen this summer have broken UK climate records once again. These records are now breaking with increasing frequency, reflecting the influence of human-induced climate change on the temperatures we’re experiencing in the UK,”
The quoted remarks were made by Dr Amy Doherty, head of the National Climate Information Centre at the Met Office, emphasising that this summer’s extremes form part of a continuing trend.
How warm will it get — and for how long?
Temperatures are forecast to rise over the coming days, reaching around 25C in London on Monday, with sunshine likely though the odd shower could appear. After that, models indicate a gradual easing, with mean daytime temperatures dropping to about 19C by the end of next week. The Met Office also says the overall pattern will remain changeable — spells of dry, settled weather mixing with showers.
Local residents in central boroughs welcomed the prospect of warmer weather. One person in Greenwich, reacting to the forecast, said: "It's been gloomy — a few sunny days would be welcome before autumn proper sets in." Community gardeners remain cautious, however, after a summer that left many parks brown and parched.
Context: a summer of records and impact on green spaces
Thursday’s bulletin points to a summer that has already been unusually hot across the UK. The country recorded 40 days with temperatures above 30C this year, and prolonged dry spells caused visible damage to city parks and open spaces. Areas including Greenwich Park were left yellowed and parched; nationally, drought was declared over more than two-thirds of England at the height of the dry period.
Dr Doherty’s analysis highlights how recent years are shifting statistical baselines: the UK’s top summer mean temperature records have been repeatedly broken since 2003, and the most recent figures even move the notorious hot summer of 1976 down the rankings.
Practical guidance for Londoners
Although the coming warmth will not meet the heatwave definition, there are sensible steps residents and visitors can take to stay comfortable and protect local green spaces:
- Keep hydrated and carry a bottle of water when out and about.
- Protect small trees and plants with watering where permitted — check borough guidance on communal planting.
- Be ready for mixed conditions: pack a light waterproof as showers remain possible.
Local councils advise that watering restrictions introduced during the drought remain under review and to consult council websites before using hosepipes in communal areas.
Outlook for the rest of September
Looking further ahead, the Met Office says that high pressure could gain greater influence later in the month, potentially producing longer stretches of drier weather and some warmer-than-average days. However, forecasters stress that uncertainty increases with time and that most of the remainder of September could remain changeable.
| Day | Expected high (London) |
|---|---|
| Monday | ~25C |
| End of next week | ~19C |
For commuters and businesses, the brief warmer spell is unlikely to prompt major changes to operations, but it offers a small window for outdoor work and maintenance that may have been delayed by cooler, wetter conditions.
As the capital moves towards autumn, the episode underlines a broader point: short-term swings in temperature remain possible even after an unusually hot summer, and the recent run of record-breaking seasons is a reminder of the shifting climate baseline affecting city life and public services.
Reporting from London, I’ve seen how the summer’s extremes left their mark on neighbourhoods, and this upcoming warm spell will be a brief respite rather than a lasting return to summer heat.
