Nope, not too late.
Choose a variety which does well in Northern Gardens. They mature faster, are often smaller, and will produce for you right on time. I recently planted small fruiting melons such as Asian, middle eastern and indian varieties too. Yum.
Beans can go in any time, you can succession sow them.
I planted more tomatoes today, however they were already started (not from seed). You get great tomatoes right into fall if you plant a few late. There is also time for squash!!
GET BUSY!

Congrats on the new home!

GGG

I think you can go ahead and plant your seed. I just planted my watermelon seed last week. The green beans will produce pretty fast if they have enough water.

Not too late! We have a long gardening season. I am planting more beans and cucumbers from seed (already have some going), still planting melons and tomatoes (plants already started).

Some of the garden centers still have vegetable plants. Don't forget to water!

The few times i tried to grow watermelon or canteloup were not successful. I got a few fruit, but they were not worth eating. I think they need that sandy soil from south Georgia. Good luck.

I love watermelon so much but it's so expensive in the stores. Growing it would be great, but the one time I tried, I got a cute little thing about the size of an apple that was of course, inedible.
Would mixing sand in with compost, etc. help? Any growing tips?
Thanks!

Your water melon and other melons will do excellently for you in very well ammended soil. I just put in a special raised "melon bed" for my own - or you can hill them. Mushroom compost, pinebark fines, cow manure or a mix of all, and if you have any some home compost or leaf mold would do wonders. Once they come up, mulch well and water deeply. You should get some delicious fruit!
I planted mine on the EDGE of the raised bed this year. I can lay some of the fruits on the stones around the edge, and let the rest cascade over and sit on thick layers of mulch. This keeps the fruit healthy. Sometimes I prop them up on planting cups (5" rounds as I grow mini-melons at home) to keep them away from insects.

Good luck!

GGG

I have no problem growing melons in non-sandy soil. What they like is lots of compost. I mix it in with my heavy clay soil and make sure they get plenty of water. You want to cut back on watering as the melons ripen to help concentrate the sugar and make them sweet.

I had great success with Sugar Baby watermelons last year. They make smaller "icebox" size melons and grow quickly, so you should have plenty of time for those this year.

I am trying canteloupes and honeydews this year (Charentais, Green Machine, Silver Line, Ambrosia). I just planted some more seeds - I'm trying to spread out the harvest so I don't wind up with a whole bunch of melons all at once. You still have time. Good luck!

Thanks for all the info everyone.Looks like it's gonna be a busy weekend. LOL!