Frost-free days

What we are showing here is the range of days recorded each year between the last frost of spring and the first frost of autumn. Normally the max-min style of chart is used vertically, but for this data it seemed to make more sense to show the span of time across the page.

View example as VML

View example as SVG

This is a good use of the arrowheads, which add a nice emphasis to the range, without being too visually dominant.