Summary of the Day: Today, Londoners can expect a largely overcast day marked by persistent rainfall. The temperatures will be relatively mild, ranging between a minimum of 12°C and a maximum of 15°C. The likelihood of precipitation is high, with a 100% chance of rain, accompanied by a brisk wind gusting at 22 mph.

Detailed Weather Forecast: Sunday's forecast calls for predominantly cloudy skies stretching throughout the day. The atmospheric mood will be sombre and grey, with rain being a consistent feature on this autumn day. Temperatures are expected to be in the moderate bracket for this time of year. The mercury will likely bottom out at around 12°C in the early hours before ascending to a modest high of 15°C during the day. Cloud cover will be thick, limiting any sunshine intervals and ensuring a cool ambiance. Humidity levels will remain elevated at 84%, contributing to a damp and somewhat chilly feel. The probability of rain is certain at 100%, turning even the briefest of outdoor ventures into potentially wet affairs. The showery spells may vary in intensity but are expected to persist at intervals from morning till night. Alongside the rain, expect a noticeable breeze, with winds reaching up to 22 mph. This brisk wind may amplify the chill factor, necessitating adequate layers for those venturing outside.

Commuting Advice: For those commuting today, it's advisable to allow extra travel time due to the potential wet and windy conditions. Public transport users should be prepared for possible delays and ensure they carry an umbrella or waterproof clothing to stay dry while waiting. Motorists should exercise caution, as surface water and spray might affect visibility and road grip.

Advice for the Day: Given the inclement weather, it's a good day to consider indoor activities. If plans necessitate being outdoors, suitable rain gear, including waterproof jackets and boots, will be essential. Keep an eye on any weather updates through the day, especially if you plan to travel. For those staying indoors, this could be a perfect opportunity for a cosy day with a warm beverage, embraced within the comforts of home.