| Meteorological data (1980–2010, May–Sept.) |
| County-wide humidex range (across all years; °C (°F)) |
| Minimum |
6.66 °C (44.0 °F) |
| Maximum |
22.4 °C (72.3 °F) |
| Heat days above relative risk threshold (n days (% of total days)) |
| 99th percentile 36.1 °C (97.0 °F) |
114 (2.40 %) |
| County-wide maximum humidex range |
| Average (°C (°F)) |
| Humidex |
38.7 °C (101.7 °F) |
| Temperature |
30.9 °C (87.6 °F) |
| Minimum (°C (°F)) |
| Humidex |
36.1 °C (97 °F) |
| Temperature |
28.0 °C (82.4 °F) |
| Maximum (°C (°F)) |
| Humidex |
46.3 °C (115.3 °F) |
| Temperature |
34.9 °C (94.8 °F) |
| Heat days above time series threshold (n days (% of total days)) |
| 36.0 °C (96.8 °F) |
117 (2.47 %) |
| County-wide maximum humidex range |
|
| Average (°C (°F)) |
| Humidex |
38.6 °C (101.4 °F) |
| Temperature |
30.8 °C (87.4 °F) |
| Minimum (°C (°F)) |
| Humidex |
36.0 °C (96.8 °F) |
| Temperature |
28.0 °C (82.4 °F) |
| Maximum (°C (°F)) |
| Humidex |
46.3 °C (115.3 °F) |
| Temperature |
34.9 °C (94.8 °F) |
| Heat day duration |
| Relative risk threshold 36.1 °C (97.0 °F) |
Time series threshold 36.0 °C (96.8 °F) |
