Yes , It does seem to be very aggressive this year.

laceyvail, I'm a novice gardener so not real experienced. Mine is a new, first-year garden. I planted Ashley cucumbers this year...OP but noted for DM resistance. These were planted late (May 28th) and were hardly a foot and a half up the trellis when they started getting the yellow spots. I pulled them last week after getting a very sad harvest...I may have let them grow on but the pickle worms found them. Over the last two months we've had 32 days of reported rain with high heat and humidity along overcast days when not raining. Sunshine has been minimal. A perfect incubator for disease...like a petri dish. We've just had the longest stretch of good sunshine that we've had all summer...4 days. Starting tomorrow we go back to 40-60 percent chance of rain.<sigh>

In case you haven't seen this DM Epidemic map I'll post a link for you... Downy Mildew Map .