5-day weather forecast for Portland, Maine
Today
49°
57°
Rain Showers
Thursday
56°
72°
Thunderstorms Likely
Friday
56°
70°
Chance Rain
Showers
Showers
Saturday
45°
65°
Partly Sunny
Sunday
44°
64°
Partly Sunny
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 | 3.8° | 6.0° |
| Average change in low temperature day-to-day | 4.7° | 7.5° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 50% | 55% |
| Chance of precip day after a dry day | 19% | 32% |
Weather forecast accuracy for Portland, Maine
| The Weather Channel | 80.83% |
| Intellicast | 80.83% |
| AccuWeather | 78.33% |
| CustomWeather | 76.67% |
| Weather Underground | 75.83% |
| National Weather Service | 75.00% |
| World Weather Online | 70.83% |
| NWS Digital Forecast | 67.22% |
| Persistence | 52.42% |
| 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
72.2% of National Weather Service's low temperature forecasts for Portland were within 3 degrees of actual temperatures last month.