5-day weather forecast for Mercer Island, Washington
Today
37°
44°
Slight Chance Rain
Tomorrow
32°
44°
Chance Rain/Snow
Wednesday
35°
43°
Chance Rain/Snow
Thursday
34°
45°
Chance Rain
Friday
35°
44°
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 | 5.3° | 4.0° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 45% | 50% |
| Chance of precip day after a dry day | 36% | 19% |
Weather forecast accuracy for Seattle, Washington
| The Weather Channel | 81.72% |
| AccuWeather | 81.45% |
| Weather Underground | 80.65% |
| Foreca | 80.11% |
| AerisWeather | 77.15% |
| NWS Digital Forecast | 76.08% |
| Wetter | 72.31% |
| Open Weathermap | 70.70% |
| World Weather Online | 70.16% |
| Persistence | 50.00% |
| Weather News | 47.58% |
| The Weather Channel | 86.76% |
| Weather Underground | 86.57% |
| AccuWeather | 84.09% |
| Foreca | 83.09% |
| NWS Digital Forecast | 78.62% |
| AerisWeather | 78.53% |
| Wetter | 77.92% |
| Open Weathermap | 74.19% |
| World Weather Online | 70.44% |
| Persistence | 54.87% |
| Weather News | 52.99% |
ForecastAdvisor Fact
On average, Persistence's high temperature forecasts for Seattle were off by 4.87 degrees last year.