Last year this time, I decided to start a crocheted Temperature Blanket running January to December 2016. Afraid that it was going to turn out huge, I tried a variety of stitches to see what would work best. The Linen Stitch or also know as the Moss Stitch was the best fit for what I needed. I used Stylecraft Special DK yarn with a G hook. I kept a rolling list of each days high temperature and crossed off each day as I finished it.
My temperature chart consisted of 12 sections in 5 degree Fahrenheit increments. I used at least 2 skeins of each color. Unfortunately, I didn't keep very good track over the year as to how many I went back to buy.
56-60 Dark Green (Not sure which shade)
Here in the UK, we had very few Dark Red days and only one Grey.
Wanting to keep the border fairly simple, I used the interlocking border stitch found here. My finished size ended up about 50 x 80 inches.