Long term weather forecast for Lucerne accurate?

Hi,

Many posters previously told me to ignore weather forecasts for Grindelwald/Wengen beyond 2 days, as they are very unreliable. I was wondering if anyone knows the accuracy of weather forecasts for other cities, such as Lucerne? Today is 6/23 and weather forecasts from 6/27 to 6/30 shows rain in Lucerne. Is this reliable prediction of the weather?



As side note, does anyone know if weather forecasts for Interlaken beyond 2 days are accurate? Since Interlaken is down in the valley and surrounded by lakes, is that city's weather more predictable than Grindelwald/Wengen?

Please help.



Thanks!



I didn't find the right solution from the Internet.



References:

www.tripadvisor.in/ShowTopic-g188045-i336-k10598594-Long_term_weather_forecast_for_Lucerne_accurate-Switzerland.html

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