Skip to main content

Weather Code Explanation

The World Meteorological Organization (WMO) uses a series of standardized weather codes to describe various weather phenomena and conditions. These codes are commonly used in weather reports and forecasts to standardize and simplify the transmission of weather information. Below are the codes involved in meteorological data.

WMO Weather Codes

CodeDescriptionCommon Name
0Clear weatherClear
1, 2, 3Partly cloudy, locally cloudy, overcastPartly cloudy, few clouds, overcast
45, 48Fog and hoarfrost depositFog, freezing fog
51, 53, 55Drizzle not freezing, intensity light, moderate, heavyDrizzle
56, 57Drizzle freezing, intensity light, moderate to heavyFreezing drizzle
61, 63, 65Rain, intensity light, moderate, heavyLight rain, moderate rain, heavy rain
66, 67Freezing rain, intensity light, heavyFreezing rain
71, 73, 75Snow, intensity light, moderate, heavyLight snow, moderate snow, heavy snow
77Ice pelletsIce pellets
80, 81, 82Showers, intensity light, moderate, heavyLight showers, showers, heavy showers
85, 86Snow showers, intensity light, moderate to heavyLight snow showers, snow showers
95Thunderstorm, light to moderate, no hailThunderstorm
96Thunderstorm, light to moderate, with hailThunderstorm with hail
99Thunderstorm, heavy, with hailThunderstorm with hail

Reference the standardized code table for weather phenomena.