We've had spells of about a week here and there where the daytime temps would reach 70-75F and nights down as low as 30F. This brought growth to a standstill and did cause some of the new growth near the tips to discolor somewhat but the recent increase in temps have things back on track. Every year brings new issues!
That's exactly what I experienced. First, the plants appeared to shut down, and then the newest growth turned yellow. The established cultivar that took the hardest hit was Cascade, which is strange because I consider Cascade to be cockroach of the hop world. One of my Cascade hills looked like it had bitten the dust, but it has been sending up new healthy shoots now that the unseasonably low night-time cold fronts have passed. The hop with no name and Spalt Select slowed to a crawl. I replaced Santium, Horizon, and Fuggle with Early Cluster, Southern Cross, and Wye Yeoman field-grade plants last fall. The new cultivars were really struggling with the weather.
Another complicating factor has been the lack of rain. I was late installing my revised drip system. I usually do not have to supplement rainfall until mid-June. We were in drought by April this year.
The problem not only affected my hops. All of the crops that are grown in my area appear to be much smaller than they should be by this point in time.
Edit: fixed quote tag