Table 5. Descriptive statistics and trend values for variables of thermal suitability and daily meteorological variables for WNV transmission between March and October from 1997 to 2019.
| Variable | Minimum | Maximum | Mean | Std. deviation | Median | tau | Sen’s slope coefficient | p-value |
|---|---|---|---|---|---|---|---|---|
| Daily temperature (°C) | -9.10 | 40.00 | 18.13 | 8.08 | 17.1 | 0.05 | 0.0004 | <0.001* |
| Precipitation (mm) | 0 | 72.20 | 0.98 | 3.56 | 0 | 0.02 | 0 | 0.05* |
| Relative humidity (%) | 6 | 100 | 53 | 21 | 55 | -0.14 | -0.003 | <0.001* |
| Sum of ET1 (0C) | 927.7 | 1555.2 | 1191.7 | 162.2 | 1190.3 | 0.42 | 14.73 | <0.001* |
| The beginning of SET2 and SEI3 | 5 March | 9April | 27 March | 11.0 days | 31 March | 0.19 | -0.538 | 0.058 |
| The end of SEI | 25 August | 17 September | 6 September | 6.6 days | 5 September | 0.11 | 0.176 | 0.479 |
| The end of SET | 7 October | 25 November | 25 October | 10.8 days | 25 October | -0.12 | -0.333 | 0.431 |
| The length of SET (days) | 184.0 | 239.0 | 212.1 | 13.4 | 212.5 | -0.20 | -0.67 | 0.214 |
| The length of SEI (days) | 145.0 | 187.0 | 162.5 | 12.2 | 161.5 | -0.15 | -0.4 | 0.352 |
1 –effective temperatures (ET); 2 –season of effective temperatures (SET); 3 –season of effective infectiveness of mosquitoes (SEI)
* mark statistically significant values