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First Frost Date Near Helena Valley Southeast, MT
Median first fall frost dates based on long-term climate normals.
Median First Fall Frost Date
- Median first fall frost date: Sep 20
- Day of year: 264
- This date is based on long-term climate normals and is best used as a planning benchmark, not a short-term forecast.
Lookup median first frost dates for ZIP codes in Helena Valley Southeast, MT
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