Some English questions about weather forecast?

Question

1.What does it mean?
"It is important to know what elements of the forecast are subject to error."

2.What is "a physics degree" in "a job which is enjoyable and utilizes my physics degree" ?

3. a sentence from a weather forecast
"Overnight into the 16th September 2004..."
Would the forecast tell us the weather of the night or the day" ?

4.What does "pull in" mean in "those mighty winds pulled in a bank of cloud" ?

5.Please put the following sentence, especially "drop well into single figures resulting" into simple English if possible.
"clearer skies and much lighter winds allowed temperatures to drop well into single figures resulting in a touch of ground frost in some rural areas."

6."The winds picked up a little." Does it say that the winds speed up a little?

7.What does "struggle" mean in "Temperatures struggled in the wet and windy conditions." ?

Answer 1

1. For example: could your prediction of wind speed be wrong? could two systems meet at a different place?
2. That would be a completed education program in the field of physics.
3. Night.
4. The clouds came closer because of the wind.
5. The temperatures were low because of no clouds or wind, so the countryside got cold.
6. Yes, that means to speed up.
7. The temperatures could not get warmer because of the wet and windy conditions.