Excuse me, generally speaking, what impact will rivers have on the climate of a region?

Near local rivers, there is a high content of water vapor in the air. Water vapor can absorb infrared rays in solar radiation, which has a strong weakening effect on solar radiation, but the temperature is not too high during the day, and it absorbs ground radiation at night, which has a heat preservation effect. Generally speaking, the temperature difference between day and night in this area has decreased. But also can increase that precipitation in this area. Make the climate in this area mild and humid.