Moving from Seattle to Denver
A climate comparison of two homes: Washington to Colorado. The dates below come from the nearest official weather station to each place.
Climate Match
Your growing season runs 93 days shorter, 247 days becomes 154 days.
Seattle, WA to Denver, CO
The full comparison
| Measure | From | To | Change |
|---|---|---|---|
| Frost-free season | 247 days | 154 days | 93 days shorter |
| Last spring frost | March 13 | May 5 | 53 days later |
| Months below freezing | 0 months | 2 months | 2 more |
| Coldest month | 6C in December | 0C in December | 6C colder |
| Warmest month | 20C in August | 23C in July | 3C hotter |
Moving from Seattle to Denver reshapes the home year. The coldest month is 6C colder. Summers get 3C hotter. Your growing season is 93 days shorter. Plan on a new rhythm for the house and garden.
What changes about the house
- Coldest month: it is colder at the destination. Check local heating needs and winterize before the cold season.
- Freezing months: there are more at the destination. Plan for a longer period of freeze-related home maintenance.
- Cooling: hotter peaks make air conditioning or shading more important. Check attic insulation and window sealing so the house does not trap heat.
- Garden: the frost-free season is shorter or the last spring frost is later. Consider transplants, short-season varieties, and cold frames.
Season by season
Spring starts later
Your last spring frost moves from March 13 to May 5, 53 days later. Delay tender planting and spring openings.
Summers run hotter
The warmest month goes from 20C in August to 23C in July. Air conditioning, shading, and cooling-load planning matter more.
Winters look harsher
Winter coldest month goes from 6C in December to 0C in December; freezing months go from 0 months to 2 months. The winter measures point to a colder season; check local heating and winter-maintenance needs.
Tools for both places
Moving from Seattle to Denver, answered
What is the biggest climate change from Seattle to Denver?
Your growing season runs 93 days shorter, 247 days becomes 154 days. That is the largest shift in the 30-year climate record.
How are these numbers computed?
From official 30-year climate normals at the nearest station to each place: Seattle Boeing Fld near Seattle and Denver Centennial Ap near Denver. They are planning averages, not forecasts; local microclimates can run a week or two off the station record.
Does the comparison work in reverse?
Yes. Open the comparison tool and swap the two places; the deltas reverse direction but the match score stays the same.
Method and sources
Temperatures and frost dates are from the 30-year climate normals at Seattle Boeing Fld (near Seattle, WA) and Denver Centennial Ap (near Denver, CO). Canadian data is from Environment and Climate Change Canada; United States data is from NOAA NCEI. These are planning averages, not forecasts. See themethodology page for the full calculation.