Short Season OP Watermelon Varieties

[SuntannedSwede]

Hello everybody,

I'm hoping to try watermelons again this year now that I have a real garden bed to plant them in. I have narrowed down this year's list to four varieties: 'Blacktail Mountain', 'Bozeman', 'Cream of Saskatchewan' and 'Sweet Siberian'. Summer nights in my area average around 45 degrees fahrenheit / 8 degrees celsius. I thought it would be nice to try and grow something interesting here, I liked the colour of the last two because you can't find watermelons like that in the store around these parts. My only concern would be our cooler nights, has anyone had success growing any of these varieties outside a greenhouse in Zone 3? Blacktail mountain is supposed to be quite hardy but it is a rather plain looking melon.