Data

• Rainfall, "tr": means trace (or anything less than 0.05 mm of rain), treat as 0 in any calculation
• Cloud cover: this is measured in oktas, discrete integer values from 0 to 8. This measures how many eighths of the sky is covered in clouds
• Max gust: measured in knots. 1km = 1.15 mph. The Great Storm in the UK was on October 15th and 16th in 1987