5-day weather forecast for Mercer Island, Washington
Today
47°
61°
Chance Rain
Showers
Showers
Friday
47°
64°
Chance Rain
Showers
Showers
Saturday
49°
66°
Chance Rain
Showers
Showers
Sunday
49°
66°
Chance Rain
Showers
Showers
Monday
51°
67°
Chance Rain
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 | 4.2° | 3.5° |
| Average change in low temperature day-to-day | 4.8° | 4.5° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 29% | 35% |
| Chance of precip day after a dry day | 38% | 31% |
Weather forecast accuracy for Seattle, Washington
| AccuWeather | 81.11% |
| The Weather Channel | 81.11% |
| Intellicast | 81.11% |
| CustomWeather | 80.56% |
| National Weather Service | 79.17% |
| NWS Digital Forecast | 78.89% |
| Weather Underground | 76.67% |
| World Weather Online | 58.05% |
| Persistence | 49.17% |
| Intellicast | 77.53% |
| The Weather Channel | 77.51% |
| AccuWeather | 76.99% |
| National Weather Service | 75.65% |
| CustomWeather | 75.01% |
| NWS Digital Forecast | 74.28% |
| Persistence | 54.31% |
ForecastAdvisor Fact
71.1% of NWS Digital Forecast's low temperature forecasts for Seattle were within 3 degrees of actual temperatures last month.