Ne’er cast a clout…
…till May be out. Does it refer to the month or the hawthorn blossom? There’s plenty of the latter (a pleasant perfume in the air), and though the temperature is comfortable, it’s no more than that (and certainly cooler than the past two days). Wait until June, in other words!

View OS map on Streetmap http://www.streetmap.co.uk/map?X=361910&Y=302130&A=Y&Z=120