Cardiff weather forecast: Overcast with 40% chance of rain and high humidity today

Cardiff, September 14, 2026 – Residents of Cardiff can expect an overcast day with a moderate chance of rain as the week begins. Temperatures will be mild, with a high of 21°C and a low of 16°C. The humidity is expected to be high, reaching 98%, making the air feel damp throughout the day.The day's weather is characterized by a significant chance of rain, with a 40% probability. While no specific precipitation amounts are detailed, the overcast conditions suggest a possibility of light showers. The maximum wind speed is predicted to be around 33.8 kph, which may bring a noticeable breeze.Cardiff Weather TodayToday, September 14, 2026, Cardiff will experience overcast skies for most of the day. The temperature will peak at a comfortable 21°C, offering a mild climate. As the day progresses, the temperature will drop to a low of 16°C, providing a cooler evening. The high humidity level of 98% will be a prominent feature, potentially making the air feel heavy and damp.There is a 40% chance of rain, so residents should be prepared for the possibility of precipitation. While the forecast does not specify the intensity or duration of any potential rainfall, the overcast conditions are a strong indicator. Wind speeds are expected to reach a maximum of 33.8 kph, which could contribute to a breezy atmosphere. The overall conditions suggest a day where outdoor activities might be somewhat limited by the cloud cover and the chance of rain.Umbrellas and waterproof footwear advisedGiven the overcast skies and a 40% chance of rain, it would be prudent for Cardiff residents to carry an umbrella or wear waterproof footwear today. The high humidity level means that even without direct rainfall, the air will feel moist. This combination of factors suggests that it might not be the most ideal day for prolonged outdoor excursions, especially if the rain materializes.Those planning to spend time outdoors should dress in layers to accommodate the mild temperatures, which will range from 16°C to 21°C. The moderate wind speeds of up to 33.8 kph could make it feel slightly cooler, particularly if there is any rain. It is advisable to check local updates throughout the day for any changes in the weather pattern, as the overcast conditions could shift.Cardiff Weather for Upcoming 7 DaysThe weather in Cardiff is set to see a mix of conditions over the next seven days, with a gradual cooling trend and varied cloud cover. Following today's overcast and potentially wet conditions, the forecast indicates a shift towards sunnier intervals.Tomorrow, September 15, is expected to be brighter with sunny intervals, though the maximum temperature will drop slightly to 19°C, with a low of 12°C. This trend of sunny intervals continues on September 16, with similar temperature ranges, a high of 18°C and a low of 13°C.By September 17, the weather is forecast to bring light showers, with temperatures remaining around 18°C for the high and 11°C for the low. The latter half of the week shows a return to more settled conditions. September 18 is predicted to have sunny intervals, with a high of 18°C and a low of 16°C.The weekend appears to offer a pleasant outlook, with September 19 forecast to be overcast but with a warmer high of 20°C and a low of 16°C. The week concludes with continued cloudy conditions on September 20, featuring a high of 21°C and a low of 15°C.DateMax Temp (C)Min Temp (C)Avg Temp (C)Condition2026-09-14211618.5Overcast2026-09-15191215.5Sunny intervals2026-09-16181315.5Sunny intervals2026-09-17181114.5Light showers2026-09-18181617.0Sunny intervals2026-09-19201618.0Overcast2026-09-20211518.0CloudySource: Data referenced in this article is taken from the latest World News and Live updates. Download the TOI app.