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The average cloud cover of the Earth, 2005-2013. Colors range from blue (no clouds) to white (totally cloudy). [6] (click for more detail) Cloud cover values only vary by 3% from year-to-year averages, whereas the local, day-to-day variability in cloud amounts typically rises to 30% over the globe.
The months of January and February have somewhat less frequent storms. On average, Tutunendo has 280 days with rainfall per year. Over ⅔ of the rain (68%) falls during the night. The average relative humidity is 90% and the average temperature is 26.4 °C. [63]
The initial version of Global Historical Climatology Network was developed in the summer of 1992. [3] This first version, known as Version 1 was a collaboration between research stations and data sets alike to the World Weather Records program and the World Monthly Surface Station Climatology from the National Center for Atmospheric Research. [4]
Guam's climate is moderated by east to northeast trade winds through the year. The average annual rainfall for the island is 86 inches (2,200 mm). [74] There is a distinct dry season from January to June, and a rainy season from July to December. [75] Typhoons frequent the island, which can lead to excessive rainfall. During El Niño years, dry ...
A climograph is a graphical representation of a location's basic climate. Climographs display data for two variables: monthly average temperature; monthly average precipitation. [1] These are useful tools to quickly describe a location's climate.
Annual U.S. temperature compared to the 20th-century average for each U.S. Climate Normals period from 1901–1930 to 1991–2020. Climatological normal or climate normal (CN) is a 30-year average of a weather variable for a given time of year. [1]
Given the Earth's surface area, that means the globally averaged annual precipitation is 990 millimetres (39 in), but over land it is only 715 millimetres (28.1 in). Climate classification systems such as the Köppen climate classification system use average annual rainfall to help differentiate between differing climate regimes.
Data are provided as temperature anomalies against the seasonal average over a past basis period, as well as in absolute temperature values. The baseline period for the published temperature anomalies was changed in January 2021 from 1981-2010 to 1991-2020. [4] All the data products can be downloaded from the UAH server. [5]