Last Frost Date - Knowledgebase Question

HELENA, Mo
Question by wjp1950
March 30, 2009
On the average could you tell me what the last frost date for the Helena area in Montana area is? Thank You!


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Answer from NGA
March 30, 2009

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The last average frost date for Helena is May 18. The first frost of the season usually arrives around September 18. That gives you about 122 frost free days. Enjoy!

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