Death Valley
California, United States Of America
36.45 ° N
116.87 ° W
167 ft
Subtropical desert
BWh Hot desert climate
+
Csil Subtropical climate with dry summer with extremely hot summer with mild winter
Traditional Koppen classification: BWh (Hot desert climate)

Official definition:
  • B – 70 % or more of the total annual rainfall is during the summer half of the year and r (r = average total annual precipitation in mm) is less than 20t + 280 (t = average annual temperature in °C), or 70 % or more of total annual precipitation is during the winter half of the year and r is less than 20t, or no half of the year has less than 70 % of total annual rainfall and r less than 20t + 140. Summer half of the year in the Northern hemisphere is from April to September, on the Southern hemisphere from October to March.
  • W – r is less than the upper limit for B type classification parameter
  • h - t is greater than or equal to 18 °C

The desert climate is characterized by extremely small rainfall. In general it includes areas, which have such little precipitation, that there is hardly any vegetation at all.

The total annual precipitation is at most 250 mm, but quite often much less and regions with no rainfall during the entire year are not an exception. In specific cases this climate type is also assigned to places with more than 250 mm of rainfall annually, but where more water is lost by evapotranspiration than falls with rain (for example some parts in Arizona).

Hot desert climate is also defined by very high temperatures all year round. Most commonly these regions are around the 30 ° latitude on both hemispheres. Temperatures can be extreme, exceeding 40 °C and sometimes even above 45 °C. However, due to the fact they are usually far inland, the differences between day and night can also be extreme and during night it is sometimes even freezing. Areas with BWh climate type are the ones where the absolutely highest temperatures on Earth have been measured (Death Valley, some parts in Libya etc.).

The most well-known region with this climate is the largest desert on Earth, the Sahara in Africa. Other areas with this climate include the deserts in Libya, parts in southern Africa (Namib desert, Kalahari desert), some parts of Mexico, large areas especially in the central Australia and also some regions in the Middle East.

Very low precipitation also means very little cloudiness, some regions can have clouds only less than 30 days per year.


Modern Trewartha classification: Csil (Subtropical climate with dry summer with extremely hot summer with mild winter)

Subtropical in the Koppen and Trewartha classification is defined as a region, where at least eight months has an average temperature of more than 10 °C, but the coldest month has an average temperature of less than 18 °C. The individual subtypes then differ in their annual precipitation distribution. In Trewartha classification there is a condition of maximum annual precipitation of 900 mm.

In general the subtropical climate is usually found in areas polewards from the tropical zones. It can also be found inside tropical zones at places with higher altitude. Typical are for example citrus trees or palm trees.

The Cs subtype in the Trewartha classification represents a subtropical climate with dry summer, sometimes referred to as the Mediterranean climate. It is characterized by hot and dry summers and mild winters, during which most of the precipitation is observed. High pressure is the dominating factor in the summer, when precipitation is very small and if there is some, it is usually in the form of very short, but intense thunderstorms. In the winter it can sometimes snow, especially at higher altitudes, but in general the winters are mild.

This climate type is most common in western coasts of continents in the middle latitudes, for example it includes areas on the West coast of the U.S. such as California, Southern Europe or Southwest tip of Australia.

  • extremely hot summer: warmest month with average temperature above 35 °C
  • mild winter: coldest month with average temperature between 10 and 18 °C

Summary

76 °F
62 / 91

1.9 in
15 days


Temperature
+

Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Min Temperature(°F) 37.043.052.063.072.079.088.084.075.063.046.039.0 62.0
Avg Temperature(°F) 52.057.066.077.085.093.0101.099.091.078.062.053.0 76.0
Max Temperature (°F) 66.072.081.091.099.0108.0115.0113.0106.093.077.066.0 91.0
Range 29.029.029.028.027.029.027.029.031.030.031.027.0 29.0


Max month Min month Annual range
Min Temperature Jul Jan 51.0°F
Avg Temperature Jul Jan 49.0°F
Max Temperature Jul Jan, Dec 49.0°F
Temperature range Sep, Nov May, Jul, Dec 78.0°F
Average
1 2 3 4 5 6 7 8 9 10 11 12
Min Temperature(°F)
Avg Temperature(°F)
Max Temperature(°F)


Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Average Range Max Min Average Range Max Min Average Range Max Min Average Range
Min Temperature 72.0 52.0 62.33 20.0 88.0 79.0 83.67 9.0 75.0 46.0 61.33 29.0 43.0 37.0 39.67 6.0
Avg Temperature 85.0 66.0 76.00 19.0 101.0 93.0 97.67 8.0 91.0 62.0 77.00 29.0 57.0 52.0 54.00 5.0
Max Temperature 99.0 81.0 90.33 18.0 115.0 108.0 112.00 7.0 106.0 77.0 92.00 29.0 72.0 66.0 68.00 6.0

Temperature
+

Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Avg Temperature (°F) 52.057.066.077.085.093.0101.099.091.078.062.053.0 76.0


Max month Min month Annual range
Avg Temperature Jul Jan 49.0°F
Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Avg Temperature (°F)


Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Average Range Max Min Average Range Max Min Average Range Max Min Average Range
Avg Temperature 85.0 66.0 76.00 19.0 101.0 93.0 97.67 8.0 91.0 62.0 77.00 29.0 57.0 52.0 54.00 5.0


Humidity
+

Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Avg Humidity (%) -9999.0-9999.0-9999.0-9999.0-9999.0-9999.0-9999.0-9999.0-9999.0-9999.0-9999.0-9999.0 76.0


Max month Min month Annual range
Avg Humidity 0, Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec 0, Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec 0.0%
Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Avg Humidity (%)


Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Average Range Max Min Average Range Max Min Average Range Max Min Average Range
Avg Humidity -9999.0 -9999.0 -9999.00 0.0 -9999.0 -9999.0 -9999.00 0.0 -9999.0 -9999.0 -9999.00 0.0 -9999.0 -9999.0 -9999.00 0.0


Precipitation
+

Month Monthly average Annual total
1 2 3 4 5 6 7 8 9 10 11 12
Average monthly precipitation (in) 0.20.20.20.20.10.00.10.20.10.10.20.3 0.2 1.9
Wetdays 122111111112 1 15
Wetdays ratio (%) 3.2
1,30
7.1
2,26
6.5
2,29
3.3
1,29
3.2
1,30
3.3
1,29
3.2
1,30
3.2
1,30
3.3
1,29
3.2
1,30
3.3
1,29
6.5
2,29
4.1
4.10959,95.8904


Max month Min month Max Season Min Season Annual range
Average monthly precipitation Dec Jun Winter Summer 0.3in
Wetdays Feb, Mar, Dec Jan, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov Autumn Summer 1
Month
1 2 3 4 5 6 7 8 9 10 11 12
Average monthly precipitation (in)
Wetdays / month


Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Range Total Max Min Range Total Max Min Range Total Max Min Range Total
Average monthly precipitation (in) 0.2 0.1 0.1 0.4 0.2 0.0 0.1 0.3 0.2 0.1 0.1 0.4 0.3 0.2 0.1 0.8
Wetdays 2 1 1 4 1 1 0 3 78 1 77 141 2 1 1 5

Precipitation
+

Month Monthly average Annual total
1 2 3 4 5 6 7 8 9 10 11 12
Average monthly precipitation (in) 0.20.20.20.20.10.00.10.20.10.10.20.3 0.2 1.9


Max month Min month Max Season Min Season Annual range
Average monthly precipitation Dec Jun Winter Summer 0.3in
Month
1 2 3 4 5 6 7 8 9 10 11 12
Average monthly precipitation (in)


Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Range Total Max Min Range Total Max Min Range Total Max Min Range Total
Average monthly precipitation (in) 0.2 0.1 0.1 0.4 0.2 0.0 0.1 0.3 0.2 0.1 0.1 0.4 0.3 0.2 0.1 0.8


Sunlight / Day length
+

Max day length Min day length Sunlight/Day length
Jan -9999 min
-167 h 21 min
600 min
9 h 60 min
600,840
623 min
10 h 23 min
(31.1.)
623,817
583 min
9 h 43 min
(1.1.)
583,857
-1666.8 %
-9999,10599
Feb -9999 min
-167 h 21 min
654 min
10 h 54 min
654,786
684 min
11 h 24 min
(29.2.)
684,756
625 min
10 h 25 min
(1.2.)
625,815
-1529.9 %
-9999,10653
Mar -9999 min
-167 h 21 min
721 min
12 h 1 min
721,719
756 min
12 h 36 min
(31.3.)
756,684
687 min
11 h 27 min
(1.3.)
687,753
-1386.1 %
-9999,10720
Apr -9999 min
-167 h 21 min
791 min
13 h 11 min
791,649
821 min
13 h 41 min
(30.4.)
821,619
759 min
12 h 39 min
(1.4.)
759,681
-1264.6 %
-9999,10790
May -9999 min
-167 h 21 min
848 min
14 h 8 min
848,592
869 min
14 h 29 min
(31.5.)
869,571
823 min
13 h 43 min
(1.5.)
823,617
-1178.7 %
-9999,10847
Jun -9999 min
-167 h 21 min
876 min
14 h 36 min
876,564
878 min
14 h 38 min
(19.6.)
878,562
870 min
14 h 30 min
(1.6.)
870,570
-1141.7 %
-9999,10875
Jul -9999 min
-167 h 21 min
859 min
14 h 19 min
859,581
875 min
14 h 35 min
(1.7.)
875,565
838 min
13 h 58 min
(31.7.)
838,602
-1163.7 %
-9999,10858
Aug -9999 min
-167 h 21 min
807 min
13 h 27 min
807,633
836 min
13 h 56 min
(1.8.)
836,604
775 min
12 h 55 min
(31.8.)
775,665
-1239.0 %
-9999,10806
Sep -9999 min
-167 h 21 min
740 min
12 h 20 min
740,700
773 min
12 h 53 min
(1.9.)
773,667
707 min
11 h 47 min
(30.9.)
707,733
-1350.5 %
-9999,10739
Oct -9999 min
-167 h 21 min
671 min
11 h 11 min
671,769
705 min
11 h 45 min
(1.10.)
705,735
639 min
10 h 39 min
(31.10.)
639,801
-1489.6 %
-9999,10670
Nov -9999 min
-167 h 21 min
611 min
10 h 11 min
611,829
637 min
10 h 37 min
(1.11.)
637,803
590 min
9 h 50 min
(30.11.)
590,850
-1635.4 %
-9999,10610
Dec -9999 min
-167 h 21 min
582 min
9 h 42 min
582,858
589 min
9 h 49 min
(1.12.)
589,851
579 min
9 h 39 min
(20.12.)
579,861
-1717.8 %
-9999,10581
Year -10832 min
-181 h 28 min
730 min
12 h 10 min
730,710
878 min
14 h 38 min
(19. 6.)
878,562
579 min
9 h 39 min
(20. 12.)
579,861
-1483.4 %
-10832,11562



Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Average Sunlight/day Max Min Average Sunlight/day Max Min Average Sunlight/day Max Min Average Sunlight/day
(min/day) -9999 -9999 -9999 -1270.9%
-9999,10786
-9999 -9999 -9999 -1180.4%
-9999,10846
-9999 -9999 -9,999 -1482.8%
-9999,10673
-9999 -9999 -9999 -1636.7%
-9999,10610
Day length 869 687 787 878 775 847 773 590 674 684 579 611

Day length
+

Max day length Min day length
Jan 600 min
9 h 60 min
600,840
623 min
10 h 23 min
(Array.1.)
623,817
583 min
9 h 43 min
(1.1.)
583,857
Feb 654 min
10 h 54 min
654,786
684 min
11 h 24 min
(Array.2.)
684,756
625 min
10 h 25 min
(1.2.)
625,815
Mar 721 min
12 h 1 min
721,719
756 min
12 h 36 min
(Array.3.)
756,684
687 min
11 h 27 min
(1.3.)
687,753
Apr 791 min
13 h 11 min
791,649
821 min
13 h 41 min
(Array.4.)
821,619
759 min
12 h 39 min
(1.4.)
759,681
May 848 min
14 h 8 min
848,592
869 min
14 h 29 min
(Array.5.)
869,571
823 min
13 h 43 min
(1.5.)
823,617
Jun 876 min
14 h 36 min
876,564
878 min
14 h 38 min
(Array.6.)
878,562
870 min
14 h 30 min
(1.6.)
870,570
Jul 859 min
14 h 19 min
859,581
875 min
14 h 35 min
(Array.7.)
875,565
838 min
13 h 58 min
(31.7.)
838,602
Aug 807 min
13 h 27 min
807,633
836 min
13 h 56 min
(Array.8.)
836,604
775 min
12 h 55 min
(31.8.)
775,665
Sep 740 min
12 h 20 min
740,700
773 min
12 h 53 min
(Array.9.)
773,667
707 min
11 h 47 min
(30.9.)
707,733
Oct 671 min
11 h 11 min
671,769
705 min
11 h 45 min
(Array.10.)
705,735
639 min
10 h 39 min
(31.10.)
639,801
Nov 611 min
10 h 11 min
611,829
637 min
10 h 37 min
(Array.11.)
637,803
590 min
9 h 50 min
(30.11.)
590,850
Dec 582 min
9 h 42 min
582,858
589 min
9 h 49 min
(Array.12.)
589,851
579 min
9 h 39 min
(20.12.)
579,861
Year 730 min
12 h 10 min
730,710
878 min
14 h 38 min
(20. 6.)
878,562
579 min
9 h 39 min
(21. 12.)
579,861



Mar, Apr, May

Jun, Jul, Aug

Sep, Oct, Nov

Dec, Jan, Feb
Max Min Average Max Min Average Max Min Average Max Min Average
Day length 869 687 787 878 775 847 773 590 674 684 579 611

Units






Units

Language