Here is another site to look at weather. It gives you an idea of daily temperatures of the past. Here is the link for March 2010.
http://www.wunderground.com/history/....html#calendar
This should bring you directly to a calender. If not scroll up or down. On the top of the calender you should see links to adjust year or adjust months, etc. Hope this helps.
March is winters last chance, but as Bill said it is generally nice.