Latest weather update and forecast for London.
London, September 17, 2026 – Residents of London can expect a day marked by a significant chance of rain, with conditions leaning towards a cooler, damp start to the week. The day will begin with light rain, potentially impacting morning commutes and outdoor activities. Temperatures will remain moderate, offering a respite from warmer weather, but the persistent moisture suggests a need for preparedness.
Source: Data referenced in this article is taken from https://www.metoffice.gov.uk
Today, September 17, 2026, Londoners will experience a day characterized by light rain and overcast skies. The maximum temperature is forecast to reach 21°C, while the minimum temperature will be around 11°C. This creates an average temperature of 16.0°C for the day. Humidity levels are expected to be high, reaching up to 92%, which will contribute to the damp feeling in the air. There is a 20% chance of rain throughout the day, with the condition text indicating “Light rain. ” Wind speeds are expected to be moderate, with a maximum of 41.84 kph. The cool temperatures, with a high of 21°C and a low of 11°C, mean that while heat is not a concern, staying dry will be key to comfort. Tomorrow, September 18, promises a sunny day with temperatures reaching up to 21°C and a low of 16°C. This pleasant weather is expected to continue into September 19, with a high of 23°C and a low of 16°C, under cloudy skies. The sun is forecast to return with sunny intervals on September 20 and 21, with temperatures climbing to a peak of 25°C on the 21st, making it the warmest day of the period. The latter part of the week sees a return to cloudier conditions on September 22, with temperatures dropping slightly to a high of 23°C and a low of 15°C, before transitioning back to sunny intervals on September 23 with a high of 21°C and a low of 13°C.
The 20% chance of precipitation, coupled with the “Light rain” condition, indicates that intermittent showers are likely throughout the day. The overall weather pattern suggests a day where outdoor plans may need to be adjusted to accommodate the prevailing damp and cool conditions. This weather pattern is conducive to staying indoors or engaging in activities that are not heavily reliant on clear skies. Planning for a day that requires indoor pursuits or ensuring you are well-equipped for damp conditions is the most practical approach.
The outlook for London over the next seven days indicates a gradual warming trend with a mix of sunny intervals and cloudy conditions, following today’s damp start. After the light rain expected today, the weather is set to improve significantly.