Climate · Americas
Boise climate, year-round
United States · Semi-arid (Treasure Valley) · Updated May 2026
Best months
May · Jun · Jul · Aug · Sep · Oct
Best for: Idaho high-desert nomads who base in the warm-season window for dry sunny days.
Year at a glance
Cells coloured by typical daytime average temperature. ★ = best months for nomads.
Jan
-1°C
72%
1mm
Feb
2°C
65%
1mm
Mar
7°C
58%
2mm
Apr
12°C
55%
2mm
May
17°C
52%
2mm
Jun
22°C
45%
1mm
Jul
26°C
40%
0mm
Aug
25°C
42%
0mm
Sep
20°C
45%
1mm
Oct
13°C
55%
2mm
Nov
6°C
72%
2mm
Dec
0°C
75%
2mm
Summer peak
26°C
July · 40% humidity
Winter low
-1°C
January · 72% humidity
Climate type
Semi-arid (Treasure Valley)
Dry summers, Moderate winters
Field notes
Semi-arid (Treasure Valley) — high-desert at 820m altitude. Winter (December–February, -1 to 2°C average) brings regular snow but rarely brutal cold. Summer (June–August, 22–26°C average, peaks above 35°C) is hot dry with humidity below 45%. Spring (April–May) and autumn (September–October) are the cleanest shoulder windows. UV is strong year-round at altitude.
Visa for nomads
Low nomad-friendlyPathway
Extendable tourist
Program
—
Typical max stay
6 months
No US DNV. ESTA Visa Waiver (90 days) or B-2 tourist visa (up to 180 days). Idaho state income tax 5.8% flat.
Editorial summary, not legal advice. Verify with the relevant consulate before applying — visa programs change with little notice.
Cost of living in Boise: ~$2,550/mo
Mid-tier monthly across rent, food, transport, utilities, and coworking.
Cities with a similar climate
Useful while you’re in Boise
- Travel insuranceLong-term, nomad-friendly cover that travels with you to Boise
- Multi-currency bankingAvoid the 4% conversion fees foreign cards rack up in United States
- eSIM data planDay-one connectivity in United States without local-SIM friction
- Coworking & colivingDay passes, monthly memberships, and verified workspaces in Boise
- Flight dealsCheapest routes in and out of Boise
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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.