Late August through September is the preferred time to sow cool season grasses in pastures and hay fields. Several factors make this the best time to sow cool season grasses, including less weed emergence/competition and adequate rainfall in most years.
soil moisture
Garden Weather Woes
Blotchy ripening of tomatoes is associated with cool, cloudy weather and potassium deficiency. Fruit cracking develops during periods of rainy weather. Blossom end rot — occurring early in the fruit development — is caused by uneven soil moisture which reduces the availability of calcium to the plant.
Oldham County Cooperative Extension Blog 