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 6.7° 6.8°
Average change in low temperature day-to-day 3.6° 7.3°
Precipitation Last Month Last Year
Chance of dry day after a precip day 60% 50%
Chance of precip day after a dry day 60% 38%

Weather forecast accuracy for Portland, Maine

Last Month
AccuWeather   82.74%
Weather Underground   80.06%
The Weather Channel   79.46%
Foreca   79.46%
MeteoGroup   76.19%
Dark Sky   75.60%
NWS Digital Forecast   74.70%
World Weather Online   71.73%
Persistence   40.83%
Last Year
The Weather Channel   79.37%
Weather Underground   78.82%
Foreca   78.13%
AccuWeather   76.55%
MeteoGroup   75.47%
Dark Sky   72.08%
NWS Digital Forecast   71.79%
World Weather Online   60.13%
Persistence   39.65%

ForecastAdvisor Fact

On average, Persistence's high temperature forecasts for Portland were off by 7.20 degrees last month.