Planting vinca burgundy and french marigolds in va.?

It is 49 and cloudy today. Tomorrow there will be a high of 59 but still cloudy. I bought these flowers yesterday and am just wondering if I should wait until tomorrow to put them in the ground or until an even warmer day. If so, should I store them inside my house or leave them outside on the covered porch? I am new to gardening. Thank you in advance.