The Effects of the Weather when Walking, Hiking & Rambling

Mountains accentuate changes in weather conditions and local situations can accentuate these conditions.

Temperature falls markedly the higher you climb. Experts estimate that the temperature can drop by 1 degree Centigrade for every 150m rise in altitude.

In very dry air, the fall may be 1 degree Centigrade for 100m rise in altitude.

In cloudy conditions, this may be 1 degree Centigrade per 200m.

Air is usually drier and warmer on the lee side of a hill.

The precise relationship between wind speed and altitude is hard to establish. However, there is a funneling effect of wind at valley heads - often very noticeable in the Lake District.

It's estimated that an increase in actual wind speed can produce a significantly greater force on an object. If wind speed increases by factor of 3 (say from 10mph to 30mph) then force exerted will increase by factor of 9!!!

In mountain areas, rain is both more frequent and heavier - local conditions and topography can have a profound effect.

Rain or sleet in a valley may mean a blizzard at the top of hills.

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