Retire City Finder
Back to Boulder

Colorado

Climate in Boulder, Colorado

Climate comfort can shape daily life, travel timing, health routines, and whether a place feels practical across the year.

Climate Comfort

Overall Comfort

3.1 / 5 · Good

Summer Feel

4.5 / 5 · Excellent

Average Summer High

Hot · 97°F

Days Above 90°F

35 days/year

Winter Feel

0.8 / 5 · Very Poor

Average Winter Low

7°F / -14°C

Days Below Freezing

150 days/year

Humidity

Comfortable · 49% average

Comfortable Months

9 months

Solar Exposure

1,673 peak-sun-hr/yr · Moderate

Weather Signals

Air Quality

4.4 / 5 · Excellent

Current AQI

AQI 34 · Good

Recent Fine-Particle Pollution

Good · 5.4 µg/m³ multi-year average

Best Months

APR, MAY, AUG

Toughest Months

DEC, JAN, FEB

Allergy Levels

Good

Heat Risk

Moderate

Drought Risk

High

Weather Volatility

3.1 / 5 · Moderate

How to use this tab

Climate comfort helps estimate how practical daily life may feel across the year, especially for heat, humidity, cold, and seasonal constraints.

What to verify

Seasonal timing, health conditions, air conditioning, air quality, and elevation can change the lived experience.