Farmers around Illinois getting set for harvest, but also have their eyes on diesel prices.

Typically, gas prices decline in the fall, but Patrick DeHaan at GasBuddy says diesel prices could climb for those working the fields.

Farmers may have noticed a recent uptick in the price at the pump.

DeHaan says that was due to a power outage at an Exxon Mobile refinery in the Chicagoland area.