Some excellent advice has been offered here. I'll add a few comments. While I am a conservative hiker and always prepared to turn back, sometimes the conditions are acceptable for a windy summit attempt. Case in point: Wright Peak in the 'daks last October. When my brother and I got to tree line, we were blasted with sustained 40+ MPH winds. We evaluated the conditions. The temperatures were around freezing, perhaps a little above so there was little risk of frostbite. We were ascending into the wind, so it would be at our back on the return. The summit was only a couple hundred meters away over relatively clean rock with good footing and good trail markings. Visibility was very good. There was no blowing snow or rime ice. Probably the most important two factors were that there was no sharp drop off down wind in case we got blown over and we were both prepared to turn around at any point.
We dropped our packs in a safe place. We also stashed our poles. While I almost never hike without them, hikers before us told us they had to crawl the last few meters to the summit on all fours. Poles would not have helped in this situation and would have become a danger in the high wind gusts. Staying low in the wind and dropping to all fours during the strong gusts kept us low to the ground and made it less likely we would get blown away.
We did end up having to scramble on all fours to the top of the summit cone where we estimated the winds to be 50-70 MPH. We could not stand up and it was difficult to breath at times. We only stayed a few minutes before carefully making our way back down to our packs. It was quite exhilarating.
Had any of the conditions been different, we would have probably turned around. If the footing was poor, or the temperature lower, or if it wasn’t such a flat summit, it would not have been worth the attempt. Having gotten reports from earlier hikers who made the summit also helped, but one always has to take into account the accuracy of such reports.