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Over the contiguous United States, total annual precipitation increased at an average rate of 6.1 percent per century since 1900, with the greatest increases within the East North Central climate region (11.6 percent per century) and the South (11.1 percent). Hawaii was the only region to show a decrease (−9.25 percent). [89]
Columbus, Ohio has a humid continental (Köppen climate classification Dfa) climate, characterized by humid, hot summers and cold winters, with no dry season.The Dfa climate has average temperatures above 22 °C (72 °F) during the warmest months, with at least four months averaging above 10 °C (50 °F), and below 0 °C (32 °F) during the coldest.
The annual precipitation of 39.3 inches (998 mm) peaks, but not strongly so, in the latter half of spring and then summer; July is the wettest month while February is the driest. Passing cold fronts in winter frequently produce snow that is occasionally heavy, with a seasonal average of 28.1 inches (71.4 cm).
A publication by the Climate System Research Center of the University of Massachusetts Amherst projects that, under the higher emissions scenario where global average temperature increases by 4.0–6.1 °C (7.2–11.0 °F), Cincinnati would experience over 80 days a year with temperatures over 90 °F (32 °C), and 29 days a year over 100 °F ...
The precipitation threshold (in millimetres) involves first multiplying the average annual temperature in °C by 20, then adding 280 if 70% or more of the total precipitation is in the high-sun summer half of the year (April through September in the Northern Hemisphere, or October through March in the Southern), or 140 if 30–70% of the total ...
The Desert Research Institute is partnering with the group to try to increase winter precipitation by 10%. "It's feast or famine for the Vegas area for winter precipitation," Desert Research ...
A map of Africa showing the ecological break around the Sahara. The northern half of the continent is primarily desert, containing the vast Sahara Desert, while its southern areas contain both savanna and plains, and its central portion contains very dense jungle regions.
The average household size was 2.43 and the average family size was 3.01. In the city the population was spread out, with 28.1% under the age of 18, 10.0% from 18 to 24, 29.1% from 25 to 44, 19.9% from 45 to 64, and 12.9% who were 65 years of age or older.