5-day weather forecast for Harwich Port, Massachusetts
Today
50°
58°
Rain Showers
Likely
Likely
Sunday
42°
60°
Chance Rain
Showers
Showers
Monday
47°
67°
Mostly Sunny
Tuesday
51°
66°
Mostly Sunny
Wednesday
56°
66°
Slight Chance Rain Showers
Click on a forecast to see the forecast trend for that day
Weather changeability for Chatham, Massachusetts
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 5.1° | 5.1° |
| Average change in low temperature day-to-day | 4.7° | 6.6° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 55% | 46% |
| Chance of precip day after a dry day | 29% | 38% |
Weather forecast accuracy for Chatham, Massachusetts
| National Weather Service | 80.46% |
| AccuWeather | 78.74% |
| The Weather Channel | 75.57% |
| Intellicast | 75.57% |
| Weather Underground | 72.99% |
| CustomWeather | 72.13% |
| NWS Digital Forecast | 69.54% |
| World Weather Online | 64.66% |
| Persistence | 42.67% |
| The Weather Channel | 69.21% |
| Intellicast | 69.19% |
| NWS Digital Forecast | 68.68% |
| CustomWeather | 68.51% |
| National Weather Service | 67.04% |
| AccuWeather | 65.78% |
| Persistence | 42.62% |
ForecastAdvisor Fact
0.0% of AccuWeather's high temperature forecasts for Chatham were off by more than 10 degrees last month.