WA
Des Moines and SeaTac have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Des Moines | Metric | SeaTac |
|---|---|---|
| 147 days | Sunny daysclear or partly cloudy skies | 147 days |
| 52 in | Precipitationper year | 52 in |
| 155 days | Wet daysrain or snow per year | 155 days |
| 6 in | Snowfallper year | 6 in |
| 4 days | Hot daysabove 90 °F | 3 days |
| 32 days | Freezing nightsat or below 32 °F | 26 days |
| 79% | Humidityaverage relative | 79% |
| 54 °F | Average temperatureyear round | 54 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Des Moines high | 48 | 51 | 55 | 60 | 67 | 71 | 78 | 78 | 72 | 61 | 52 | 47 |
| SeaTac high | 48 | 50 | 54 | 59 | 66 | 71 | 77 | 78 | 72 | 61 | 52 | 47 |
| Des Moines low | 37 | 37 | 40 | 43 | 49 | 53 | 57 | 57 | 53 | 46 | 40 | 36 |
| SeaTac low | 38 | 38 | 40 | 43 | 49 | 53 | 57 | 57 | 54 | 47 | 41 | 37 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Des Moines | 6.9 | 4.8 | 5.5 | 4.5 | 3.0 | 2.3 | 1.0 | 1.3 | 2.6 | 5.3 | 7.6 | 7.0 |
| SeaTac | 6.9 | 4.8 | 5.5 | 4.5 | 3.0 | 2.3 | 1.0 | 1.3 | 2.6 | 5.3 | 7.6 | 7.0 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Des Moines | 7 | 10 | 9 | 10 | 12 | 13 | 20 | 21 | 18 | 12 | 8 | 7 |
| SeaTac | 7 | 10 | 9 | 10 | 12 | 13 | 20 | 21 | 18 | 12 | 8 | 7 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Des Moines vs another city
- Des Moines vs Normandy Park, WA
- Des Moines vs Lakeland North, WA
- Des Moines vs Kent, WA
- Des Moines vs Federal Way, WA
- Des Moines vs Burien, WA
- Des Moines vs New York, NY
- Des Moines vs Los Angeles, CA
- Des Moines vs Chicago, IL
- Des Moines vs Houston, TX
- Des Moines vs Phoenix, AZ
- Des Moines vs Philadelphia, PA
SeaTac vs another city
- SeaTac vs Normandy Park, WA
- SeaTac vs Tukwila, WA
- SeaTac vs Burien, WA
- SeaTac vs Bryn Mawr-Skyway, WA
- SeaTac vs White Center, WA
- SeaTac vs New York, NY
- SeaTac vs Los Angeles, CA
- SeaTac vs Chicago, IL
- SeaTac vs Houston, TX
- SeaTac vs Phoenix, AZ
- SeaTac vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).