|

Providing advertising-free access to reference, educational and literary materials.
|
|
Wind Chill Temperatures and Charts |
|
The Wind Chill Temperature (WCT) is also known
as the "feels like" temperature and is based
on the rate of heat loss from exposed human
skin caused by the combined effects of wind
and cold. As the wind increases, the body
cools at a faster rate, causing a drop in
skin temperature and eventually the internal
body temperature.
While the summertime heat index chart
combines the effects of high air temperatures
with high humidity levels to reach its "feels
like" temperature, wind chill charts combine
the effects of low air temperatures with wind
speed to attain the wintertime "feels like"
temperature.
Exposure to low wind chills can be life
threatening to both humans and animals alike,
so when venturing outdoors when wind chill
temperatures are low, it is imperative that
you dress in multiple layers of warm clothing,
wear a warm hat, keep dry at all times, and
try to stay out of the wind. Although all
exposed skin should be covered, the most
vulnerable parts of the body are the extremities
such as fingers, toes, ears, and the nose, so it
is crucial that these areas be protected from
exposure to the cold air and wind. In extreme
cold, it's best to cover your mouth to protect
your lungs from the bitter cold, and wear a
warm pair of mittens since they offer better
protection than gloves.
NOTE: The threshold for Wind Chill temperatures
is normally considered temperatures at or below
50 degrees Fahrenheit and wind speeds above 3
miles per hour. Wind Chill temperatures also
assume no impact from the sun (i.e., a clear
night sky), since bright sunshine may increase
the Wind Chill temperature by as much as 10 to
18 degrees Fahrenheit.
National Weather Service Wind Chill Warnings
When Wind Chill conditions reach critical
thresholds the U.S. National Weather Service
(NWS) issues either a Wind Chill Warning or a
Wind Chill Advisory. A Wind Chill Warning is
issued when wind chill temperatures are life
threatening. The NWS issues a Wind Chill Advisory
when wind chill temperatures are potentially
hazardous.
|
|
|
|
New Fahrenheit and Celsius Wind Chill Charts |
|

Wind Chill Chart (Celsius)
| | Temperature (degrees Celsius) |
|---|
| | 10 °C | 5 °C | 0 °C | -5 °C | -10 °C | -15 °C | -20 °C | -25 °C | -30 °C | -35 °C | -40 °C | -45 °C | -50 °C |
|---|
Wind speed
(kph) | 10 km/h | 8.6 | 2.7 | -3.3 | -9.3 | -15.3 | -21.1 | -27.2 | -33.2 | -39.2 | -45.1 | -51.1 | -57.1 | -63.0 |
|---|
| 15 km/h | 7.9 | 1.7 | -4.4 | -10.6 | -16.7 | -22.9 | -29.1 | -35.2 | -41.4 | -47.6 | -53.7 | -59.9 | -66.1 |
|---|
| 20 km/h | 7.4 | 1.1 | -5.2 | -11.6 | -17.9 | -24.2 | -30.5 | -36.8 | -43.1 | -49.4 | -55.7 | -62.0 | -68.3 |
|---|
| 25 km/h | 6.9 | 0.5 | -5.9 | -12.3 | -18.8 | -25.2 | -31.6 | -38.0 | -44.5 | -50.9 | -57.3 | -63.7 | -70.2 |
|---|
| 30 km/h | 6.6 | 0.1 | -6.5 | -13.0 | -19.5 | -26.0 | -32.6 | -39.1 | -45.6 | -52.1 | -58.7 | -65.2 | -71.7 |
|---|
| 35 km/h | 6.3 | -0.4 | -7.0 | -13.6 | -20.2 | -26.8 | -33.4 | -40.0 | -46.6 | -53.2 | -59.8 | -66.4 | -73.1 |
|---|
| 40 km/h | 6.0 | -0.7 | -7.4 | -14.1 | -20.8 | -27.4 | -34.1 | -40.8 | -47.5 | -54.2 | -60.9 | -67.6 | -74.2 |
|---|
| 45 km/h | 5.7 | -1.0 | -7.8 | -14.5 | -21.3 | -28.0 | -34.8 | -41.5 | -48.3 | -55.1 | -61.8 | -68.6 | -75.3 |
|---|
| 50 km/h | 5.5 | -1.3 | -8.1 | -15.0 | -21.8 | -28.6 | -35.4 | -42.2 | -49.0 | -55.8 | -62.7 | -69.5 | -76.3 |
|---|
| 55 km/h | 5.3 | -1.6 | -8.5 | -15.3 | -22.2 | -29.1 | -36.0 | -42.8 | -49.7 | -56.6 | -63.4 | -70.3 | -77.2 |
|---|
| 60 km/h | 5.1 | -1.8 | -8.8 | -15.7 | -22.6 | -29.5
| -36.5 | -43.4 | -50.3 | -57.2 | -64.2 | -71.1 | -78.0 |
|---|
|
|
|
|
Temperature Conversion Between Celsius and Fahrenheit |
°Celsius = (°Fahrenheit - 32) ÷ 1.8
°Fahrenheit = (°Celsius x 1.8) + 32
| Condition |
Fahrenheit |
Celsius |
| Boiling point of water |
212° |
100° |
| A very hot day |
104° |
40° |
| Normal body temperature |
98.6° |
37° |
| A warm day |
86° |
30° |
| A mild day |
68° |
20° |
| A cool day |
50° |
10° |
| Freezing point of water |
32° |
0° |
| Temperature
Conversion |
| Celsius |
Fahrenheit |
|
Celsius |
Fahrenheit |
|
Celsius |
Fahrenheit |
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
32.0
33.8
35.6
37.4
39.2
41.0
42.8
44.6
46.4
48.2
50.0
51.8
53.6
55.4
57.2
59.0
60.8
62.6
64.4
66.2
68.0
|
|
21
22
23
24
25
26
27
28
29
30
33
32
33
34
35
36
37
38
39
40
41
|
69.8
71.6
73.4
75.2
77.0
78.8
80.6
82.4
84.2
86.0
87.8
89.6
91.4
93.2
95.0
96.8
98.6
100.4
102.2
104.0
105.8
|
|
42
43
44
45
46
47
48
49
50
55
52
53
54
55
56
57
58
59
60
100
|
107.6
109.4
111.2
113.0
114.8
116.6
118.4
120.2
122.0
123.8
125.6
127.4
129.2
131.0
132.8
134.6
136.4
138.2
140.0
212
|
|
|
|
|
OLD Wind Chill Chart (In use until 2001) |
|
In 2000, the National Weather Service brought
together a large group of experts to revise the
old Wind Chill Chart that was found to offer
inaccurate wind chill values that were often
far lower than they should have been. The
large number of wind chill temperatures in
excess of 100 below zero found on the lower
right side of the chart below illustrates
that very point. The former WCT Index utilized
by the National Weather Service in the United
States and the Meteorological Services of
Canada, was based on the outdated Siple and
Passel Index that dated back to 1945.
Extensive clinical trials were undertaken
to help develop a more accurate formula
to calculate how wind-blown cold air feels
on human skin and determine frostbite
threshold values. The end result is a
Wind Chill Temperature Index that is more
accurate, understandable and useful in
determining the dangers from wind coupled
with cold temperatures. The new Wind Chill
Chart is presented above, while the old
Wind Chill Chart -- in use until late in
2001 -- is shown below.


This Wind Chill Temperature comparison chart
contrasts the old Wind Chill formula with the new.
|
|

If you find the above data useful, please
link to this page from your blog or website.
Alternatively, consider making a donation
to Internet Accuracy Project. Our organization
relies on donations to run our various
educational projects.
Copyright © 2005 INTERNET ACCURACY PROJECT. All rights reserved. All
content, is the exclusive property of Internet Accuracy Project
and may not be reproduced (on the Web, in print, or otherwise)
without the express written permission of our organization.
BY ACCESSING THIS SITE YOU ARE STATING THAT YOU AGREE TO
BE BOUND BY OUR TERMS AND CONDITIONS
regardless of whether you reside in the United States of
America or not. Our Privacy
Policy.
|