Latest weather updates and forecast for Cardiff.
Source: Data referenced in this article is taken from https://www.metoffice.gov.uk
Today, September 19, 2026, Cardiff will experience a day characterized by light rain. The maximum temperature is forecast to reach 19°C, while the minimum temperature will be around 12°C, resulting in an average temperature of 15.5°C. Humidity levels are expected to be high, reaching 93%, which may make the air feel damp. There is a 40% chance of rain throughout the day, with precipitation expected to be light. Wind speeds could reach up to 51.5 kph, adding a brisk feel to the day. The sunrise is scheduled for 06:54 and sunset for 19:18, providing a typical autumn day length. Saturday, September 20th, will see a shift to sunny skies with a slightly cooler average temperature of 14.5°C, with a minimum of 10°C. The pleasant weather is expected to continue into Sunday, September 21st, with sunny intervals and a rise in the average temperature to 16.0°C. The warmest day of the upcoming week appears to be Monday, September 22nd, with a high of 23°C and an average of 18.5°C, under predominantly sunny skies. The latter half of the week, from Tuesday, September 23rd, to Friday, September 25th, will feature a mix of sunny intervals, with average temperatures generally ranging between 16.5°C and 17.5°C.
Given the forecast of light rain and high humidity, it is advisable for Cardiff residents to carry umbrellas and wear waterproof footwear. The moderate wind speeds might also make it feel cooler than the actual temperature, so a light jacket or sweater would be a sensible addition to your attire. it could still disrupt outdoor plans, particularly in the morning While the rain is not expected to be heavy. It would be wise to check the latest weather updates before embarking on any significant outdoor activities. Following a damp start to the week, Cardiff is set to experience a significant improvement in weather conditions. There is no indication of significant rainfall or strong winds throughout the next seven days, suggesting a period of generally settled and mild autumn weather.