5-day weather forecast for Long Island, Maine
Today
54°
64°
Mostly cloudy
Saturday
57°
83°
Partly sunny
Sunday
55°
71°
Slight Chance Rain Showers
Monday
53°
72°
Slight Chance Rain Showers
Tuesday
54°
68°
Chance Rain
Showers
Showers
Click on a forecast to see the forecast trend for that day
Weather changeability for Portland, Maine
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 4.2° | 6.0° |
| Average change in low temperature day-to-day | 6.6° | 7.5° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 71% | 55% |
| Chance of precip day after a dry day | 19% | 32% |
Weather forecast accuracy for Portland, Maine
| The Weather Channel | 70.54% |
| Intellicast | 70.54% |
| CustomWeather | 65.18% |
| Weather Underground | 64.88% |
| National Weather Service | 64.88% |
| AccuWeather | 62.80% |
| NWS Digital Forecast | 61.54% |
| World Weather Online | 57.14% |
| Persistence | 48.81% |
| The Weather Channel | 71.37% |
| Intellicast | 71.30% |
| AccuWeather | 68.04% |
| National Weather Service | 67.31% |
| NWS Digital Forecast | 66.73% |
| CustomWeather | 66.57% |
| Persistence | 41.66% |
ForecastAdvisor Fact
2.7% of NWS Digital Forecast's high temperature forecasts for Portland were off by more than 10 degrees last year.