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 5.0° 6.5°
Average change in low temperature day-to-day 4.2° 7.2°
Precipitation Last Month Last Year
Chance of dry day after a precip day 63% 69%
Chance of precip day after a dry day 22% 33%

Weather forecast accuracy for Portland, Maine

Last Month
NWS Digital Forecast   76.01%
Foreca   75.98%
Weather Underground   75.62%
AccuWeather   74.70%
The Weather Channel   74.11%
MeteoGroup   72.02%
World Weather Online   68.15%
Dark Sky (forecast.io)   67.56%
Persistence   50.63%
Last Year
Weather Underground   74.90%
The Weather Channel   74.86%
AccuWeather   73.47%
MeteoGroup   71.90%
Foreca   71.03%
NWS Digital Forecast   66.30%
Dark Sky (forecast.io)   65.35%
World Weather Online   60.59%
Persistence   41.61%

ForecastAdvisor Fact

1.9% of Weather Underground's low temperature forecasts for Portland were off by more than 10 degrees last year.