Raisin, California is a small unincorporated community located in Fresno County, in the heart of the San Joaquin Valley. The climate in Raisin is classified as Mediterranean, characterized by hot, dry summers and mild, wet winters. Summers often experience high temperatures, frequently reaching triple digits, while winter temperatures are generally mild, rarely dropping below freezing. Rainfall is relatively low, with most precipitation occurring between November and April.

As for hydrology constituents, Raisin is situated in a region heavily reliant on irrigation for agriculture. The area benefits from the nearby Kings River, which provides a vital water source for both farming and recreational activities. The river supports various aquatic species and offers opportunities for fishing and boating.

In terms of outdoor recreation, Raisin is surrounded by picturesque landscapes, making it an ideal destination for nature enthusiasts. Nearby, you can find the Kings River itself, where activities like canoeing, kayaking, and rafting are popular. Additionally, the region is dotted with parks and wildlife areas, such as the San Joaquin River National Wildlife Refuge and the Sierra National Forest, which provide ample opportunities for hiking, camping, wildlife viewing, and birdwatching.