There were 105 tornadoes in Iowa in 2008.
Iowa averages 35 tornadoes every year.
In the 30 year period of 1981-2010 Iowa averaged about 1 tornado related death per year. However, it varies widely from year to year. Some years saw not deaths from tornadoes in that state, while in 2008 13 people died from tornadoes in Iowa, 9 of them from a single tornado.
35 is an average number of tornadoes per Year in Iowa.
1,200 a year in the U.S. on average. Worldwide figures are not known.
5000
About a Thousand each year.
not enough
6
5
There were 33 confirmed tornadoes in Iowa in 2010.
365 days
Yes, though they are most common in spring and summer.