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WMO Climatological Standard Normals for 1991-2020 (NCEI Accession 0253808)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: October 04, 2025 | Last Modified: 2025-01-22T00:00:00.000+00:00
The World Meteorological Organization (WMO) Climatological Standard Normals are a large suite of data products that provide information about typical climate conditions for thousands of locations across the world. Normals act both as a ruler to compare today’s weather and tomorrow’s forecast, and as a predictor of conditions on a calendar basis. The Normals are calculated for a uniform 30-year period, and consist of monthly averages and statistics of temperature, precipitation, and other climatological variables observed in all member countries. Member countries follow a standard set of methods for performing these calculations, WMO No.1203. The Normals are generated every 10 years in keeping with the needs of our users and the requirements of the WMO. These data allow travelers to pack the right clothes, farmers to plant the best crop varieties, and utilities to plan for seasonal energy usage. Many other important economic decisions that are made beyond the predictive range of standard weather forecasts are either based on or influenced by climate Normals. Finally, they are used most commonly in broadcast meteorology. These valuable data are stored by the World Data Center for Meteorology - Asheville.

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0253808 AIR TEMPERATURE BAROMETRIC PRESSURE cloud amount/frequency INCOMING SOLAR RADIATION PRECIPITATION AMOUNT RELATIVE HUMIDITY sunshine VISIBILITY WIND DIRECTION WIND SPEED anemometer barometer ceilometer pyranometer rain gauge thermistor thermometer in situ World Meteorological Organization World-Wide Distribution climatology UN/WMO > World Meteorological Organization, United Nations EARTH SCIENCE > ATMOSPHERE > AEROSOLS > DUST/ASH/SMOKE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > INCOMING SOLAR RADIATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR RADIATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SUNSHINE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > DEW POINT TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY > RELATIVE HUMIDITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND DIRECTION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD FREQUENCY EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN > FREEZING RAIN EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > SOLID PRECIPITATION > HAIL EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > SOLID PRECIPITATION > SNOW EARTH SCIENCE > ATMOSPHERE > WEATHER EVENTS > FOG EARTH SCIENCE > ATMOSPHERE > WEATHER EVENTS > LIGHTNING EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS > SNOW DEPTH EARTH SCIENCE > CLIMATE INDICATORS > LAND SURFACE/AGRICULTURE INDICATORS > SOIL TEMPERATURE EARTH SCIENCE > OCEANS > OCEAN OPTICS Vapor Pressure ANEMOMETERS > ANEMOMETERS BAROMETERS > BAROMETERS CEILOMETERS > CEILOMETERS PYRANOMETERS > PYRANOMETERS RAIN GAUGES > RAIN GAUGES THERMISTORS > THERMISTORS THERMOMETERS > THERMOMETERS CONTINENT > AFRICA CONTINENT > ANTARCTICA CONTINENT > ASIA CONTINENT > AUSTRALIA/NEW ZEALAND CONTINENT > EUROPE CONTINENT > NORTH AMERICA CONTINENT > SOUTH AMERICA GEOGRAPHIC REGION > GLOBAL OCEAN OCEAN Global LNGHHU

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