Bélarga (French pronunciation: [belaʁɡa]; Languedocien: Belargan) is a commune in the Hérault département in the Occitanie region in southern France.

In 2020, Météo-France published a typology of climates in mainland France in which the commune is exposed to a Mediterranean climate and is part of the Provence-Languedoc-Roussillon climatic region, characterized by low rainfall in summer, very good sunshine (2,600 h/year), a hot summer 21.5 °C (71 °F), very dry air in summer, dry conditions in all seasons, strong winds (with a frequency of 40 to 50% for winds > 5 m/s), and little fog.

For the period from 1971 to 2000, the average annual temperature was 14.6 °C (58 °F) with an annual atmospheric temperature of 16.3 °C (61 °F). The average annual total rainfall during this period was 641 mm, with 5.9 days of precipitation in January and 2.6 days in July. For the subsequent period of 1991 to 2020, the average annual temperature observed at the nearest weather station, located in the commune of Saint-André-de-Sangonis, 10.79 km away as the crow flies, is 15.5 °C (60 °F), and the average annual total rainfall is 652.4 mm.

For the future, climate parameters for the municipality projected for 2050, based on different greenhouse gas emission scenarios, can be consulted on a dedicated website published by Météo-France in November 2022.

Changes in the number of inhabitants have been documented through population censuses conducted in the commune since 1793. For communes with fewer than 10,000 inhabitants, a full census of the population is conducted every five years, with the legal populations for the intervening years estimated through interpolation or extrapolation. For this commune, the first complete census under the new system was carried out in 2006.

In 2021, the commune had a population of 668, reflecting an increase of +21.45% since 2015 (Hérault: +7.29%, France excluding Mayotte: +1.84%).

Historical population

Year Pop. ±% p.a. 1793 256 —     1800 263 +0.39% 1806 279 +0.99% 1821 273 −0.14% 1831 369 +3.06% 1836 330 −2.21% 1841 341 +0.66% 1846 331 −0.59% 1851 341 +0.60% 1856 331 −0.59% 1861 375 +2.53% 1866 392 +0.89% 1872 374 −0.78% 1876 362 −0.81% 1881 286 −4.60% 1886 326 +2.65% 1891 295 −1.98% 1896 328 +2.14% 1901 336 +0.48%	Year Pop. ±% p.a. 1906 340 +0.24% 1911 373 +1.87% 1921 321 −1.49% 1926 316 −0.31% 1931 288 −1.84% 1936 295 +0.48% 1946 296 +0.03% 1954 254 −1.89% 1962 250 −0.20% 1968 247 −0.20% 1975 228 −1.14% 1982 245 +1.03% 1990 241 −0.21% 1999 258 +0.76% 2006 397 +6.35% 2011 451 +2.58% 2016 586 +5.38% 2021 668 +2.65%
Source: Ldh/EHESS/Cassini until 1999, and INSEE since 2006.

• Château de Bélarga

• Communes of the Hérault department