5-day weather forecast for Mercer Island, Washington
Today
35°
50°
Rain Likely
Tomorrow
38°
52°
Rain
Friday
45°
52°
Rain Likely
Saturday
44°
52°
Rain Likely
Sunday
44°
51°
Rain Likely
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 | 3.0° | 3.9° |
| Average change in low temperature day-to-day | 7.1° | 4.2° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 32% | 30% |
| Chance of precip day after a dry day | 55% | 19% |
Weather forecast accuracy for Seattle, Washington
| Foreca | 84.44% |
| AccuWeather | 83.33% |
| Weather Underground | 83.06% |
| The Weather Channel | 82.50% |
| NWS Digital Forecast | 78.45% |
| MeteoGroup | 75.56% |
| Dark Sky (forecast.io) | 71.67% |
| World Weather Online | 67.22% |
| Persistence | 47.78% |
| The Weather Channel | 85.95% |
| Weather Underground | 85.93% |
| AccuWeather | 84.34% |
| Foreca | 83.90% |
| MeteoGroup | 82.07% |
| NWS Digital Forecast | 79.94% |
| Dark Sky (forecast.io) | 78.75% |
| World Weather Online | 65.39% |
| Persistence | 58.19% |
ForecastAdvisor Fact
ForecastWatch.com is the largest provider of weather forecast accuracy statistics.