Average change in
Temperature
Average change in high temperature day-to-day
Last Month:
6.0°
Last Year:
4.0°
Average change in low temperature day-to-day
Last Month:
2.9°
Last Year:
3.9°
Average change in
Precipitation
Chance of dry day after a precip day
Last Month:
60%
Last Year:
38%
Chance of precip day after a dry day
Last Month:
24%
Last Year:
19%
ForecastAdvisor Fact
On average, World Weather Online's low temperature forecasts for Mercer Island were off by 3.52 degrees last month.