U.S. Climate Extremes

The United States is a large and diverse land mass with widely varying climate conditions. Local climates are affected by factors that include latitude, topography, elevation, and proximity to oceans, lakes, and rivers. The unique climate conditions of different areas of the country are reflected in the maps and lists of climatologically extreme values which are based on NOAA's 1981-2010 U.S. Climate Normals.

This tool provides information about the location and magnitudes of the highest/lowest values for various annual Normals parameters, which we refer to here as "Climate Extremes." For example, the 10 stations in the contiguous U.S. with the warmest annual mean temperature are located in Florida, Arizona, and Texas. To avoid excessive clustering of climate extremes in the same parts of the country, we limit the candidate stations to 447 stations (412 CONUS, 29 AK, 6 HI) which include many of the key stations that are operated by the National Weather Service and the Federal Aviation Administration.

Being apart from the 48 contiguous states, Alaska and Hawaii have separate climates. The inclusion of these two states in the returned list of values is optional.

Minimum Distance Filter

A minimum distance filter is useful for when many stations are located close to one another in a particular region of extreme climate. If a region is represented by one station, another station must be a specified distance away, outside of the specified radius, to ensure regional representation is more diverse. The station with the most extreme value will represent the region.

Station Locations