Casper, WY Snowfall A-

First snow Oct 4 · Last snow May 6 · 71.6 in/yr · Station: CASPER-NATRONA COUNTY AP

Avg First Snow

Oct 4

Median over 28 seasons 14d late

Avg Last Snow

May 6

Median over 28 seasons

Snow Season

215 days

SepJun

Avg Annual Snowfall

71.6 in

Rank #40 of 217 tracked

Latest season (2025–26): first measurable snowfall arrived 14 days later than the 30-year normal.

Average Monthly Snowfall (inches)

1.2

Sep

7.1

Oct

9.2

Nov

10.5

Dec

8.9

Jan

11.0

Feb

10.4

Mar

10.8

Apr

2.5

May

0.1

Jun

How Casper Compares

Casper snowfall vs Wyoming and U.S. medians
Measure	Casper	Wyoming median	U.S. median
Avg annual snowfall	71.6 in	66.5 in	39.1 in
Avg first snowfall	Oct 4	Oct 13	Nov 16
Avg last snowfall	May 6	May 4	Apr 3
Snow season length	215 days	204 days	139 days

Medians are taken across tracked cities with regular snowfall (6 in Wyoming, 201 nationally).

Nearby Tracked Cities

Ski Resorts in Wyoming

Data source: NOAA GHCN-Daily records for CASPER-NATRONA COUNTY AP (USW00024089), 14 km from the city center, accessed via the ACIS web service. Normals window: 1990–91 through 2019–20 snow seasons. Measurable snow = ≥ 0.1 in.