Climate · Americas
Boulder climate, year-round
United States · Semi-arid continental (mountain west) · Updated May 2026
Best months
May · Jun · Sep · Oct
Best for: Cooler version of Denver's pattern with more wind off the Front Range.
Year at a glance
Cells coloured by typical daytime average temperature. ★ = best months for nomads.
Jan
0°C
52%
1mm
Feb
2°C
52%
1mm
Mar
5°C
50%
2mm
Apr
9°C
48%
2mm
May
14°C
53%
3mm
Jun
20°C
48%
2mm
Jul
23°C
45%
2mm
Aug
22°C
47%
2mm
Sep
17°C
48%
2mm
Oct
11°C
50%
1mm
Nov
4°C
52%
1mm
Dec
0°C
54%
1mm
Summer peak
23°C
July · 45% humidity
Winter low
0°C
January · 52% humidity
Climate type
Semi-arid continental (mountain west)
Dry summers, Dry winters
Field notes
Same Denver pattern with marginally cooler temperatures and significantly more wind — chinook winds off the Flatirons can hit 80mph in winter. Summer thunderstorms are afternoon-reliable. Altitude (1,650m) and intense UV — sunburn happens fast even on cool days.
Visa for nomads
Low nomad-friendlyPathway
Extendable tourist
Program
—
Typical max stay
6 months
ESTA Visa Waiver (90 days) for most western passports, no extensions in-country; B-2 visitor visa up to 6 months. No US digital-nomad visa exists. Long-term residence requires H-1B / O-1 / EB green-card paths.
Editorial summary, not legal advice. Verify with the relevant consulate before applying — visa programs change with little notice.
Cost of living in Boulder: ~$3,780/mo
Mid-tier monthly across rent, food, transport, utilities, and coworking.
Cities with a similar climate
Editorial estimates aggregated from public climatological summaries — typical monthly averages, not forecasts. Treat as order-of-magnitude. Microclimate, altitude, and recent extreme weather can swing these values significantly.