I find AccuWeather.com to be way off in the forecasts and I find that weather.com is more accurate.
Accuweather tends to have a 5 to 10 degree difference between the forecasts when comparing Accuweather to weather.com
I never rely on Accuweather but do rely on weather.com which is my go to website to check the weather.
Accuweather's long range forecast is a good thing to watch to see what the average temperatures are during that time but never rely on the forecast longer than a week.