The table below shows the monthly rainfall, in inches, for a city over 6 months. What was the average monthly rainfall over these 6 months, rounded to the nearest tenth of an inch?
| Month | Rainfall (inches) |
|---|---|
| Jan | 3.5 |
| Feb | 2.1 |
| Mar | 4.0 |
| Apr | 1.8 |
| May | 2.5 |
| Jun | 3.1 |
2.8
2.9
3.0
17.0
