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 6.8° 6.5°
Average change in low temperature day-to-day 6.3° 7.2°
Precipitation Last Month Last Year
Chance of dry day after a precip day 55% 69%
Chance of precip day after a dry day 41% 33%

Weather forecast accuracy for Portland, Maine

Last Month
AccuWeather   72.13%
The Weather Channel   69.25%
Weather Underground   68.97%
Foreca   67.53%
Dark Sky (forecast.io)   67.53%
MeteoGroup   66.95%
NWS Digital Forecast   62.50%
World Weather Online   62.50%
Persistence   35.19%
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

On average, NWS Digital Forecast's low temperature forecasts for Portland were off by 4.12 degrees last month.