SeasonMapBig Sky vs Sun Valley: which is better, month by month
Big Sky beats Sun Valley in 5 of 12 months — its lead peaks in April (77 vs 58) — and they are within 3 points in the other 7 months.
Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Big Sky vs Sun Valley — all 12 months
| Month | Big Sky | Sun Valley | Winner | Gap |
|---|---|---|---|---|
| January | 90Sfreezing, a little rain, clean air | 86Afreezing, a little rain, clean air | Big Sky | 4 |
| February | 94Sfreezing, a little rain, clean air | 91Sfreezing, a little rain, clean air | Tie | 3 |
| March | 83Afreezing, a little rain, reliable snow | 83Acold, a little rain, muggy air | Tie | 0 |
| April | 77Bcold, a little rain, reliable snow | 58Dcold, a little rain, reliable snow | Big Sky | 19 |
| May | 50Dcool, rainy, reliable snow | 34Fcool, a little rain, reliable snow | Big Sky | 16 |
| June | 20Fnice, rainy, clean air | 20Fnice, dry, clean air | Tie | 0 |
| July | 14Fwarm, a little rain, clean air | 12Fwarm, dry, clean air | Tie | 2 |
| August | 12Fnice, a little rain, clean air | 14Fwarm, dry, clean air | Tie | 2 |
| September | 23Fnice, a little rain, clean air | 18Fnice, dry, clean air | Big Sky | 5 |
| October | 59Dcold, a little rain, clean air | 45Fcold, a little rain, clean air | Big Sky | 14 |
| November | 74Bfreezing, a little rain, clean air | 72Bcold, a little rain, clean air | Tie | 2 |
| December | 87Afreezing, a little rain, clean air | 88Afreezing, a little rain, clean air | Tie | 1 |
A month is a tie when the two are within 3 points. The widest gap is April (77 vs 58). Tap a month for that month's temperature, rain, humidity and air quality side by side.