5-day weather forecast for Mercer Island, Washington
Today
51°
75°
Mostly Sunny
Tomorrow
54°
77°
Partly Sunny
Friday
55°
68°
Slight Chance Rain Showers
Saturday
52°
71°
Chance Rain
Showers
Showers
Sunday
54°
78°
Partly Sunny
Click on a forecast to see the forecast trend for that day
Weather changeability for Seattle, Washington
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 3.7° | 3.8° |
| Average change in low temperature day-to-day | 3.5° | 3.9° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 29% | 32% |
| Chance of precip day after a dry day | 38% | 26% |
Weather forecast accuracy for Seattle, Washington
| The Weather Channel | 88.89% |
| Foreca | 88.89% |
| AccuWeather | 88.06% |
| Weather Underground | 87.78% |
| MeteoGroup | 83.61% |
| NWS Digital Forecast | 82.22% |
| Dark Sky | 72.50% |
| World Weather Online | 66.11% |
| Persistence | 58.89% |
| Foreca | 83.63% |
| AccuWeather | 83.59% |
| The Weather Channel | 83.37% |
| Weather Underground | 83.06% |
| MeteoGroup | 82.37% |
| NWS Digital Forecast | 81.38% |
| Dark Sky | 74.46% |
| World Weather Online | 71.13% |
| Persistence | 57.03% |
ForecastAdvisor Fact
16.9% of MeteoGroup's high temperature forecasts for Seattle were exactly right last year.