Overview
- The Met Office’s outlook expects a largely dry, increasingly warm period from around September 22 into late September with London reaching about 25C on the warmest day.
- High‑resolution model maps from Netweather using the GFS model show localized higher peaks of up to about 28C and suggest more than 30 areas could top 25C, especially in eastern counties.
- Temperatures will vary sharply across the country, with the south and east warming into the mid‑20s while Scotland is likely to stay much cooler with readings in the teens.
- Forecasters attribute the spell to a deep Atlantic low pulling warmer continental and subtropical air northward followed by a build of high pressure that will create the fine, short‑lived conditions.
- The warm burst is expected to be brief and timing remains subject to change, with the Met Office warning October will likely bring more frequent Atlantic lows, rain and stronger winds.