| The Wind chill Index, or Chill Factor, depends on two things: temperature and wind speed. Higher Wind speed and lower temperature together make the temperature feel colder than it actually is. To use this chart, locate temperature along the left-hand column and the windspeed across the top row. The Wind Chill is the number at the intersection of that row and column. | |||||||
| Wind Speed-MPH | |||||||
|---|---|---|---|---|---|---|---|
| Calm | 5 | 10 | 15 | 20 | 25 | 30 | 35 |
| Temperature (Degrees F) | Apparent Temperature | ||||||
| 45 | 43 | 34 | 29 | 26 | 23 | 21 | 20 |
| 40 | 37 | 28 | 23 | 19 | 16 | 13 | 12 |
| 35 | 32 | 22 | 16 | 12 | 8 | 6 | 4 |
| 30 | 27 | 16 | 9 | 4 | 1 | -2 | -4 |
| 25 | 22 | 10 | 2 | -3 | -7 | -10 | -12 |
| 20 | 16 | 3 | -5 | -10 | -15 | -18 | -20 |
| 15 | 11 | -3 | -11 | -17 | -22 | -25 | -27 |
| 10 | 6 | -9 | -18 | -24 | -29 | -33 | -35 |
| 5 | 0 | -15 | -25 | -31 | -36 | -41 | -43 |
| 0 | -5 | -22 | -31 | -39 | -44 | -49 | -52 |
| -5 | -10 | -27 | -38 | -46 | -51 | -59 | -64 |
| -10 | -15 | -34 | -45 | -51 | -59 | -64 | -67 |
| -15 | -21 | -40 | -51 | -60 | -66 | -71 | -74 |
| -20 | -26 | -46 | -58 | -67 | -74 | -79 | -82 |
| -25 | -31 | -52 | -65 | -74 | -81 | -86 | -89 |
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