I don't know what the weather is like in your country but here in Luxembourg it gets better day by day. And as far as I am concerned, this sunny weather gives me a little punch to put on my Nike Freeruns and have a nice run outside. I am so in love with these shoes, I got Nike's Freerun 5.0 for outdoor sports and a pair of Flyknit's to hit the gym.
Personally I don't think that you should wear Flyknit's if you are jogging outside, because your foot isn't well-held in this shoe and you are more likely to sprain your ankle if your track is a little stony or full of branches.
If you are thinking about getting your own pair of Freerun's, you should definitely consider their customize service which allows you to create your own unique pair of Nike's.
Here's some inspiration just for you