What is the average annual rainfall for Nebraska?

The average annual rainfall for Nebraska is approximately 22 inches. This value reflects the typical precipitation the state receives throughout the year, accounting for variations across different regions. Nebraska's geography, which includes plains and varying elevations, contributes to this average. It is important to note that rainfall can differ significantly within the state, with eastern Nebraska receiving more precipitation than western regions due to factors such as climate and topography.

The other options either underestimate or overestimate the average rainfall based on historical data and climatological studies. For instance, figures like 15 inches, while they may represent drier areas or specific locations, do not capture the state's overall average. Similarly, numbers like 30 inches and 40 inches are generally associated with more humid regions or states and do not accurately reflect Nebraska's climate profile. Understanding the average rainfall is crucial for agricultural practices, water resource management, and ecological studies in the state.