Illinois has an increased chance of below-average temperatures and above-average precipitation in July, according to the outlook released by the NWS Climate Prediction Center earlier this week.
The July precipitation forecast is amazing for showing such a large area with an increased chance of above-average precipitation. The odds are especially high in southern Illinois. This does not necessarily mean that July will be record-breaking like June, just wetter than average.
The July temperature forecast shows a large area across the central US with an increased chance of below-average temperatures. Historically, it is not unusual in Illinois for wet conditions in May and June to lead to cooler temperatures in July. The wet soils keeps the air temperatures cooler. At least that’s the theory.