平年（へいねん）より６日（むいか）、昨年（さくねん）より１２日早（にちはや）い冠雪（かんせつ）です。

Instinct tells me to read that as じゅうににち, but I can't remember if any dates besides 1-10 and 20 get a different reading.


From: http://mainichi.jp/life/edu/maishou/news...9000c.html


Wait a second. Oh, I see. They do not read the number for you unless it is irregular, such as むいか. Duhh.

Just FYI, but dates that end in 4 are also irregular:　じゅうよっか、にじゅうよっか

And the 20th -> はつか