Columns headers are:
1. Year
2. Month
3. Day
4. Hour
5. Pressure (hPa)
6. Temperature (C)
7. Relative Humidity (%)
8. Precipitation (inches)
9. Solar Radiation (W/m^2)
10. Average Wind Speed (m/s)
11. Maximum Wind Speed (m/s)
12. Wind Direction (degrees)
13. NOT USED (MISSING)
14. NOT USED (MISSING)
15. NOT USED (MISSING)
16. NOT USED (MISSING)
17. NOT USED (MISSING)
18. NOT USED (MISSING)
19. NOT USED (MISSING)
20. NOT USED (MISSING)