This will help to prevent your seedlings and plants dying in the frost. Email: Location: Barrow Birmingham Bury Camberley Cambridge Cardiff Chepstow Chester Chiseldon Christchurch City of Derry Airport Colchester Doncaster Edinburgh Glasgow Godalming Godalming Grays Guildford Halesowen Khatmandu Kingston Upon Thames Leicester Lewes Liverpool London Manchester Market Drayton Market Drayton Meopham Moscow Mytchett Newcastle upon Tyne Newport Oulu Oxford Reading Reykjavik Rugby San Francisco Selsey Sheffield Swindon Walney Island Airport Watford Whitchurch Withernsea York Lower than Temperature: degrees C