Hi SophiePickle
Doesnt look like blight to me. I would also say its just a tad early. Cool, wet weather encourages the development of the fungus after a hot dry spell so if you have just had it hot and muggy then I wouldnt worry too much and put it down to lack of water and general lack of TLC. If you see dark marks on the stems on your outdoor ones then I would panic
The scaring could be something called odema which is when the plants get too hot and close their stoma to avoid loosing too much water, but then you water them and the roots are taking up more water than the than the now closed stoma can get rid of it so the plants form corky scales and distorted leaf growth. Very common on geranuins..... Boils down to regular watering, little and often.....