World
North America
Helena Regional Airport (1188m)
Wind-direction (January 2000 - December 2008)
| N | 9 % |  |
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| NE | 4 % | |
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| E | 7 % | |
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| SE | 3 % | |
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| S | 6 % | |
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| SW | 11 % | |
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| W | 46 % | |
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| NW | 13 % | |
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