The Climate—in regard to temperature, is subject to great variation; upon the mountains, snow will often continue for several months, (and may frequently be seen there of a considerable depth) when there is none in the lower districts. The weather is very inconstant, but mostly runs in extremes. In the Spring months, the cold, piercing, easterly winds are most prevalent; and our longest droughts are always accompanied by them: in some places they have acquired the name of sea-pines, from the slow progress vegetation makes whenever they continue for a few weeks. Rain is of little use while they prevail, from the great cold which always attends them.
The mild western and southern breezes rarely take place before June; they are certain harbingers of rain and vigorous vegetation, and are the most prevailing winds through the Summer and Autumn: In the latter season, they often blow with tempestuous fury, dash out the corn, and disappoint the just hopes of the industrious farmer.
Our greatest falls of snow, or rain, are from the south, or south-east; and whenever we have a very high west wind, it is a certain sign that a great quantity of rain is falling to the westward, in Cumberland and Roxburghshire.
From “General view of the agriculture of the county of Northumberland: with observations on the means of its improvement; drawn up for the consideration of the Board of Agriculture and Internal Improvement”, (1797) which is available here