Warm start to week to make way for wetter and windier conditions
Summary
This week will start warm and sunny but will become wetter and windier as a strong jet stream brings low-pressure weather systems to the UK. Temperatures will drop to normal September levels, and while higher pressure might return later in the month, a late-September heatwave is unlikely.Key Facts
- Monday will be the warmest day, with temperatures above 20°C in many areas and up to 26°C in parts of southern England.
- The jet stream, a fast-moving air current high above the Earth, will strengthen and bring rain and wind later in the week.
- Winds will shift to westerly or north-westerly by Thursday, making the weather cooler and fresher.
- Temperatures will fall to around 14-16°C in Scotland and Northern Ireland and 17-20°C in England and Wales by midweek.
- Low-pressure systems will cause unsettled weather with rain and wind towards next weekend, possibly causing minor disruption.
- High pressure may return near the end of September, possibly bringing drier weather and warmer days.
- There is no current sign of a late-September heatwave; cooler, chillier mornings are possible as nights get longer.
- Long-range weather forecasts can change, so updates should be checked regularly.
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