Last year from around the middle of May through June Bank Holiday weekend climates and weather almost mirrored that of what we are having now.
With reference to lawns here are the articles that I wrote then:
**images 4 & 5 are a patch of grass I started to repair about 6 weeks ago. The rest of the images are from last year 
One should really take the first article and read it well. The second of course being my sense of humour but still a very logic answer.
I have prepared lawns that have had full seed germination within 10 days. I have also prepared lawns where very little to nothing will happen…
- as long as one of the factors required for the growth of any plant is missing
- as long as it is not ‘logic’ for the seed to germinate
- as long as we do not have ‘typical irish weather’
And the answer to that of course is when it comes to nature sometimes patience is the greatest asset. My own lawn prepared about a month before I wrote the above articles is clear evidence of that and hence where I got the photographs from, The lawn sown in the pebbles almost a better germination…?
One may have had the soil prepared and presented well when the contractor left the garden… the soil may have dipped and hollowed slightly… some may have the ‘sahara desert’ cracking effect… in some cases some stone has been brought to the surface… all in all it looks a bit rough. I assure you – unless one has a bottom-less supply of rolled turf, a fire hydrant on full blast over night where the lawn will take in the most water and a shaded [completely] garden – no green [or very little] will appear… Funny thing is, the weeds will most likely grow there first.
I have just re-read – again – my article from last year…. and I once again realise that not even a degree in horticulture will help one here… it didn’t help me. It just helped me to understand better the why and why nots.
The truth is even when all of that is overcome…. the shelves of the supermarket gardens centres are brimmed with horticultural paraphernalia to help you and your lawn… and for very good reason. Clover, moss, weeds, fertiliser the list goes on *and* has done for eons…