Chichester and Horsham will start sunny changing to overcast by lunchtime, peaking at 14 degrees Celsius before dropping to six overnight. Worthing will start sunny changing to heavy rain in the afternoon, the Met Office said. The town will peak at 15 before dropping to six overnight. Brighton will also start sunny changing to light rain in the afternoon, peaking at 15 before dropping to eight. Eastbourne and Hastings will start sunny changing to heavy rain in the afternoon peaking at 15 before dropping to seven and eight respectively.