I had one customer a few years ago insisting I spray axial even after pointing at the sky and showing the radar. An hour into the spray job the sky opened up. The axial that had half an hour was fine, the rest did not work. Since you had an hour on it you will be fine.
I had a very similar thing happen spraying glyphosate on canola. Sky was unfriendly and the radar was not encouraging but the customer said it would be fine so I loaded a tank (200 acres) and went to work. Started to sprinkle before i was done and the radar was showing a system heading our way and not far away. Got back to the truck and told the customer "I guess that will be it for today", he said, "we'll do another tank". I showed him the radar , he looked at it and said "hmm.....we'll do another tank". So, under protest I filled another 200 acres and went out. Rained on and off throughout the entire tank so when I got back to the truck I said, "well, I guess that's it then", he said, "we'll do another tank" WHAT!!!. So I load up and sprayed it in a light rain. This went in for 5 tanks and on the last one I called him and said, "I'm throwing mud clods all over the place which means I'm pulling plants out of the ground!!". He said "yeah, we'll finish this tank and call it a day". If it was up to me I would have packed it in after the first tank. As it turned out, it ALL worked and rain settled in the next day and we never did get a chance to spray the rest. This is good example of why I say that a custom applicator with any amount of experience has more actual experience than a farmer who has been spraying his own for decades. Each of us has our own "limits" when it comes to risk. a farmer only sprays within his/her own limits and so ALL of their experience is limited to only within those limits. Speed, rain, wind, cold, hot, etc. A custom applicator has the experience of ALL of this customers risk limits. Some will spray in conditions that most others won't but won't spray in some conditions that others will. We get to learn from ALL different risk types where the individual farmer typically won't spray outside of his own.