2025 Compare Cities Climate:
Erwin, TN vs Keystone, SD

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Highlights
- Keystone has 54.3% less rainy days than Erwin.
- Keystone has 12.7% more Sunny Days than Erwin.
- On the BestPlaces comfort index, Keystone scores 11.8% worse than Erwin
 Erwin, TNKeystone, SDUnited States
 Rainfall  Unlock2038
 Snowfall10  Unlock28
 Precipitation  Unlock91106
 Sunny197  Unlock205
 Avg. July High  Unlock8186
 Avg. Jan. Low26  Unlock22
 Comfort Index (higher=better)  Unlock6.77
 UV Index4.4  Unlock4.3
 Elevation  Unlock43312443
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