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 8.2° 6.9°
Average change in low temperature day-to-day 8.5° 7.4°
Precipitation Last Month Last Year
Chance of dry day after a precip day 25% 64%
Chance of precip day after a dry day 29% 31%

Weather forecast accuracy for Portland, Maine

Last Month
Weather Underground   78.77%
The Weather Channel   78.42%
Foreca   76.03%
MeteoGroup   73.97%
AccuWeather   71.58%
NWS Digital Forecast   67.21%
Dark Sky (forecast.io)   63.36%
World Weather Online   57.88%
Persistence   41.18%
Last Year
The Weather Channel   74.62%
Weather Underground   74.62%
MeteoGroup   73.24%
AccuWeather   72.98%
Foreca   72.40%
NWS Digital Forecast   67.40%
Dark Sky (forecast.io)   67.17%
World Weather Online   61.60%
Persistence   41.87%

ForecastAdvisor Fact

53.9% of Dark Sky (forecast.io)'s low temperature forecasts for Portland were within 3 degrees of actual temperatures last year.