Phân tích chất lượng không khí lịch sử Helena Valley West Central, Montana, United States

16°C11/20°C

15°C7/22°C

18°C9/27°C

20°C12/27°C

19°C12/25°C

19°C12/27°C

18°C11/26°C

17°C10/24°C

16°C10/23°C

16°C10/23°C

17°C10/24°C

14°C8/19°C

15°C11/20°C

15°C9/22°C

17°C9/24°C

17°C10/25°C

18°C11/27°C

18°C11/27°C

13°C8/19°C

13°C6/23°C

17°C8/27°C

18°C8/27°C

16°C10/21°C

15°C6/25°C

16°C9/25°C

18°C11/27°C

16°C11/21°C

15°C10/21°C

14°C8/21°C

12°C9/19°C

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