With wheat the main problem is that it isn't ripen and I might be too cold in this time of year that it will. If I try swathing how long it would take untill I can combine it? How does dew affect? And how about one small rain? Like two or three millimeters? During a day it will be 12-14C, but cloudy.
I would say if you have a decent 10 day window, actually down to 9 now, you could swath it and have it in the bin, it still might not be as dry as you would prefer, which is likely what you're up against. It's very similar to trying to get dry hay, in which case 9 days of generally good weather is a no brainer in the north. You're still going to have to pick and chose the sunny or breezy spells when you can pick up the swath.
For most crops, harvest can normally commence within 4-10 days after desiccation. However, late fall applications and adverse weather conditions such as rainfall, cool temperatures and high humidity will slow plant desiccation and keep seed moisture levels high which can delay commencement of harvest beyond 10 days after application. When those conditions prevail after REGLONE ION desiccation, commence harvest when plant material is dry and seed moisture level allows efficient harvesting. To minimize seed loss and to maintain seed quality, harvest of desiccated crops should commence as soon as seed moisture reaches the level for normal harvest.
For what it's worth, I've quit haying here for this year, not done, just have plenty already and I'm saving moisture and nutrients for next year which will certainly begin with much drier soils than the past number of years. With our present forecast, if I wanted more hay I would start cutting on Saturday if the next 6 days looked somewhat decent then.
I don't know how many hundreds of thousands of miles of swaths I've picked up in the last 50 years, but the only ones I ever left behind were in the water, the rest were dry or very close.