Mind you I ran my first PFT in 18 degrees, same place too, but in the winter you kinda expect it and you dress for it. 35-45 degrees and windy just sucks because you CANT dress for it. You dress heavy and you'll get really hot, you dress light and you'll get cold until the last half mile when you finally start to generate enough of your own body heat to feel better. Well, enough bitching. Here's how I did...
The Marine Corps PFT is scored out of 300 pts, 100 pts for each of 3 areas: run, pullups, situps. Basically upper, core, and lower body. You get 2 minutes to do as many situps as you can, max score being 100. You get infinite time to do as many pullups as you can, max score being 20. You run 3 miles and max score time is 18:00 total. Each crunch is worth 1 pt, each pullup worth 5, and each 10 seconds on the run worth 1 pt (or 6 pts per minute).
I did 21 pullups, 100 crunches, 22:45 which comes out to 272/300. I was happy with it because my first PFT was 201, my second I contracted with 236.
The purpose of this from the Marine Corps side was basically just to make sure nobody had let themselves go to hell since their last PFT, which would equate to getting below a 225 (minimum acceptance), but really not improving was something they'd raise a flag about.
Out of everyone there, I got the 2nd highest. My buddy who already went through OCS and has been doing CrossFit for a year got a 283 because his run time was 20:50, though.
A "First Class" PFT is considered 225 or above in the Fleet, but for aspiring officer candidates, you're expected to perform in the 250+ range. To put that in perspective, the guys who generally make Force Reconassaince, the Marine Corps' special forces, kinda have to perform at 295-300. Most people would say they have to get 300 but I'm sure you can get in with slightly less as long as you have some incredibly marketable skill (perfect expert marksmanship on rifle and pistol, arabic proficiency, etc).
) run their 1.5 in around high 9's or 10 I think. I came in at the 1.5 mi mark at 10:56 today.
That takes a lot of discipline. 
Old lady time has settled in permanently. 
Of course I was also thirty pounds lighter. I used to be slim and could eat a gallon of ice cream at one sitting if it was a very hot day and I had been working outside for hours. And not gain an ounce. Now all I have to do is LOOK at a container of ice cream and I gain weight. Best I can do now is not running, but swimming. Twenty laps takes me forty minutes. God, am I slooow. Well, at least I am alive, right? 