Cool and Dry means Not Great for Veggies

Despite the drizzly conditions the last few days, the farm has seen very little precipitation in the last 6 weeks. We have only received 3 tenths of an inch since early June. Considering good plant growth requires about an inch of water a week, we are seriously under-watered right now. Every weather system containing precipitation has either just missed the farm, or dissipated before getting to us. We can irrigate the transplants with our drip system, and we do our best to keep moving the sprinkler on the direct seeded garden but nothing compares to a good, steady rain.
The field crop garden has no irrigation at all, and is dependent on rainfall to water the plants there.
Now that the blooms are on the peas, and potato's we really, really need rain in order for the plants to set their fruit.
Add to this the unseasonably cool weather we've had and plant growth is nowhere near what we've seen in the last 8 years. Normally our first CSA share would include Romaine lettuce, but our first heads won't be ready until this coming week, the fourth CSA share drop. We have had Broccoli as early as the second CSA share, this year it looks like it wont be until the fifth share, although there are a few heads starting to form now.
July has been downright cold, cold enough that we have had a few wood fires in the stove to drive the chill out of the house. We have never, ever had a fire in the house in the month's of July or August. Considering this is usually the hottest time of the year, when corn, melons and peppers are thriving, we're becoming concerned that some of those heat loving crops may not be ready before the first frost in fall.