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Sunshine duration is about 2,500-2,700 hours per year, from 147 – average 4.7 hours of sunshine per day in December to 338 – average 10.9 hours of sunshine per day in July. [8]
This is a list of cities by average temperature (monthly and yearly). The temperatures listed are averages of the daily highs and lows. Thus, the actual daytime temperature in a given month may be considerably higher than the temperature listed here, depending on how large the difference between daily highs and lows is.
Between the north and south there can be a considerable difference in temperature, ... C (41.0–42.8 °F), Rome 7 ... in late November or late March and even April. ...
Some parts of the empire, however, saw better precipitation. A weather diary, compiled by Ptolemy in Alexandria in around 120, mentioned rain in every month except August and thunder throughout the summer. It helps to explain the agricultural prosperity of Roman Africa (the granary of Rome), and the prosperity of southern Spain in the Roman era ...
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The Roman Warm Period, or Roman Climatic Optimum, was a period of unusually-warm weather in Europe and the North Atlantic that ran from approximately 250 BC to AD 400. [1] Theophrastus (371 – c. 287 BC) wrote that date trees could grow in Greece if they were planted but that they could not set fruit there.
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