| Variable | PNECRIAN |
| Ozone | 0.135 |
| Precipitation | −0.076 |
| Humidity | −0.174 |
| Wind-speed | 0.096 |
| Maximum ET | −0.028 |
| Minimum ET | −0.092 |
| Mean ET | −0.046 |
| Maximum WET | −0.007 |
| Minimum WET | −0.049 |
| Mean WET | −0.034 |