5-day weather forecast for Somerville, Massachusetts
Today
27°
38°
Mostly sunny
Sunday
21°
33°
Partly sunny
Monday
26°
43°
Mostly sunny
Tuesday
32°
43°
Partly sunny
Wednesday
29°
39°
Mostly cloudy
Click on a forecast to see the forecast trend for that day
Weather changeability for Boston, Massachusetts
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 8.1° | 6.5° |
| Average change in low temperature day-to-day | 8.4° | 6.2° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 50% | 53% |
| Chance of precip day after a dry day | 32% | 28% |
Weather forecast accuracy for Boston, Massachusetts
| National Weather Service | 77.81% |
| The Weather Channel | 76.72% |
| NWS Digital Forecast | 74.43% |
| Intellicast | 73.56% |
| Weather Underground | 73.51% |
| CustomWeather | 72.99% |
| AccuWeather | 69.29% |
| World Weather Online | 62.64% |
| Persistence | 32.26% |
| The Weather Channel | 74.06% |
| National Weather Service | 70.08% |
| AccuWeather | 69.75% |
| Intellicast | 68.99% |
| CustomWeather | 67.65% |
| NWS Digital Forecast | 66.46% |
| Persistence | 42.03% |
ForecastAdvisor Fact
27.6% of Persistence's high temperature forecasts for Boston were within 3 degrees of actual temperatures last year.