"Appreciate your advice and suggestions on whether it would be worthwhile for us to travel to Switzerland in this period":
What do you want to visit:
Historical museums, art museums, watch museums, transport museum, ethnographic museums, red cross museum, olympic museum, medieaval towns (with and without citywall walks), medieval castles, baroque churches and monasteries, roman theatres, celtic lake dwellings, menhirs, modern buildings (Mario Botta, Calatrava, Jean Nouvel, Herzog&Demeuron, Diener&Diener, etc.), lakes with historic steamboats, underground lakes and waterfalls, summer ski areas, the highest wineyard of Europe, the highest village of Europe, the longest glacier of Europe, the steepest (highest gradiant) cog railway and cable car lines of Europe, the highest cableway station of Europe (3800 m), Islands with palm trees and tropical plants (Brissago), scenic mountain railways, concerts, theatres .....
If we know what you are interested in, we can make a proposal.
As public transport is rather expensive in Switzerland, study carefully the sites about Swiss Pass, Swiss Flexipass and Swiss half fare card: http://www.swisstravelsystem.ch/Tickets.16.0.html?&L=2#s_h_f_c
Switzerland has rougly 4 climate zones:
Midlands (Zurich, Basel, Bern, St. Gallen, etc.)
Northern side of the Alps (Gstaad, Grindelwald, Engelberg, Andermatt, Flims, Davos, etc.)
Valais (Verbier, Crans-Montana, Zermatt, Saas Fee, Loetschental, etc.)
Southern Switzerland (Airolo, Locarno, Lugano, Soglio, Poschiavo, etc.)
In the autom and winter, there is often fog in the Midlands and sun in the Alps and in the Jura (mountain chain between Geneva and Basel, along the border with France). There is less fog in the Lausanne-Montreux area.
Valais is the driest and often warmest area.
May be you have a look at
http://www.myswitzerland.com/en/home.html
http://www.swisstravelsystem.ch/en/