Mel,
Here's my 'take' on your question.

The body has myelinated (with a sheath) and unmyleinated
(with no protective sheath/coating) nerves, naturally.

Myelinated nerves can have the sheath affected and become exposed
due to outside reasons/causes.
Result- neuropathy.

Unmyelinated nerves can be disturbed more easily than myelinated.
(less protection because they naturally never had a sheath)
Disruption of the sheath doesn't necessarily cause the entire nerve to become unmyelinated - just a portion, but that's all that is necessary to cause a neuropathy
These nerves can be affected by weather change due to barometric pressure on our bodies.
Its not the weather itself, but the change of pressure in the atmosphere,
whether you're in the house or out- doesn't matter, the barometer is
the same, unlike the temperature - which can be different than the
outside weather.
The atmospheric pressure is what bothers the neuropathy-
pressure on the nerves that give signals to the brain that are
mixed and 'corrupt'.
The brain interprets theses signals as pain, or other Sx of our PN.