Boulder vs Kelowna: which is better, month by month

Boulder beats Kelowna in 6 of 12 months — its lead peaks in December (67 vs 38) — while Kelowna wins May and September; they are within 3 points in the other 4 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.

Boulder

🇺🇸 United States · mild climate

Best month: September 90/100
Months won: 6 of 12

Kelowna

🇨🇦 Canada · mild climate

Best month: September 94/100
Months won: 2 of 12

Boulder vs Kelowna — all 12 months

Month	Boulder	Kelowna	Winner	Gap
January	62Ccold, dry, clean air	42Fcold, a little rain, clean air	Boulder	20
February	66Ccold, a little rain, clean air	49Fcold, a little rain, clean air	Boulder	17
March	74Bcool, a little rain, clean air	66Ccold, a little rain, clean air	Boulder	8
April	80Acool, a little rain, reliable snow	78Bcool, a little rain, clean air	Tie	2
May	83Anice, rainy, clean air	92Snice, a little rain, clean air	Kelowna	9
June	88Ahot, a little rain, clean air	89Awarm, a little rain, clean air	Tie	1
July	84Ahot, a little rain	83Ahot, dry, clean air	Tie	1
August	87Ahot, a little rain, clean air	85Ahot, dry	Tie	2
September	90Swarm, a little rain, clean air	94Snice, a little rain, clean air	Kelowna	4
October	86Anice, dry, clean air	70Bcool, a little rain, clean air	Boulder	16
November	73Bcool, dry, clean air	54Dcold, rainy, clean air	Boulder	19
December	67Ccold, dry, clean air	38Fcold, rainy, clean air	Boulder	29

A month is a tie when the two are within 3 points. The widest gap is December (67 vs 38). Tap a month for that month's temperature, rain, humidity and air quality side by side.