5-day weather forecast for Portland, Maine

Weather changeability for Portland, Maine

Temperature Last Month Last Year
Average change in high temperature day-to-day 5.5° 6.2°
Average change in low temperature day-to-day 5.2° 6.8°
Precipitation Last Month Last Year
Chance of dry day after a precip day 50% 51%
Chance of precip day after a dry day 13% 28%
 
 

Weather forecast accuracy for Portland, Maine

Last Month
MeteoGroup   84.48%
Weather Underground   80.46%
The Weather Channel   78.74%
Foreca   77.01%
AccuWeather   75.29%
National Weather Service   74.14%
CustomWeather   74.14%
WeatherBug   70.11%
Dark Sky (forecast.io)   61.78%
Persistence   48.21%
Last Year
The Weather Channel   74.78%
MeteoGroup   73.62%
Foreca   72.49%
National Weather Service   70.81%
AccuWeather   70.18%
Weather Underground   69.70%
CustomWeather   67.65%
WeatherBug   67.34%
Persistence   43.90%
 

ForecastAdvisor Fact

9.5% of Persistence's high temperature forecasts for Portland were exactly right last month.