Census ZIP Code Tabulation Area
Will ZIP 83406 have a white Christmas?
Snow-on-the-ground odds near Ammon, ID, for December 25, 2026.
The historical picture
The validated 1991–2020 spatial model indicates an estimated 85% chance of at least one inch of snow on the ground at this ZCTA’s Census internal point.
ACS population
19,696
Land area
32.03 sq mi
Nearest station
10 mi
3DEP elevation
4,977 ft
Climate period
1991–2020
This is a Census ZCTA, not a USPS delivery-route boundary. Its internal point is 3 miles from Ammon. The estimate retains all four NOAA source stations and their interpolation weights.
Frequently asked questions
- Will ZIP 83406 have a white Christmas?
- Its validated 1991–2020 historical estimate is 85%, or about about 9 years in 10. Inside the forecast window, live ensemble guidance is blended with that history.
- Is this the exact USPS ZIP boundary?
- No. The Census Bureau creates ZIP Code Tabulation Areas to approximate the geography of USPS ZIP Codes. USPS delivery routes can change and do not form a permanent national polygon dataset.