Concrete Walkway Repair?

[DD716TED]

I have a concrete walkway that has developed a crack across it... Now that cold weather is approaching I have a question.. Would it do any good to try to fill the crack before any more water gets into it and then freezes or am I to late for that and best to wait to fill the crack next summer when things are warmer and dryer?

[HayZee518]

Is the crack big? Why did the walk crack? lack of re-bar in the slab or did the ground shift and settle? if the crack in hazardous you could make a patch with a latex concrete binder or use a hydraulic cement to plug the crack. hydraulic cement expands when it cures. regular mortar will contract slightly.