Great Sand Dunes National Park vs Yellowstone National Park: which is better, month by month

Great Sand Dunes National Park beats Yellowstone National Park in 9 of 12 months — its lead peaks in December (71 vs 42) — while Yellowstone National Park wins July to August; they are within 3 points in June.

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.

Great Sand Dunes National Park

🇺🇸 United States · arid climate

Best month
September 93/100
Months won
9 of 12

Yellowstone National Park

🇺🇸 United States · continental climate

Best month
August 92/100
Months won
2 of 12

Great Sand Dunes National Park vs Yellowstone National Park — all 12 months

MonthGreat Sand Dunes National ParkYellowstone National ParkWinnerGap
January64Cfreezing, dry, clean air45Ffreezing, a little rain, clean airGreat Sand Dunes National Park19
February74Bcold, dry, clean air47Ffreezing, a little rain, clean airGreat Sand Dunes National Park27
March80Acold, dry, reliable snow62Cfreezing, a little rain, muggy airGreat Sand Dunes National Park18
April86Acool, dry, reliable snow71Bcold, a little rain, reliable snowGreat Sand Dunes National Park15
May92Snice, a little rain78Bcold, a little rain, reliable snowGreat Sand Dunes National Park14
June88Awarm, dry86Acool, a little rainTie2
July83Ahot, a little rain, clean air90Snice, dryYellowstone National Park7
August87Awarm, dry, clean air92Snice, a little rain, clean airYellowstone National Park5
September93Snice, dry, clean air84Acool, a little rain, clean airGreat Sand Dunes National Park9
October90Scool, dry, clean air70Bcold, a little rain, clean airGreat Sand Dunes National Park20
November78Bcold, dry, clean air55Dfreezing, a little rain, clean airGreat Sand Dunes National Park23
December71Bcold, dry, clean air42Ffreezing, a little rain, clean airGreat Sand Dunes National Park29

A month is a tie when the two are within 3 points. The widest gap is December (71 vs 42). Tap a month for that month's temperature, rain, humidity and air quality side by side.