Palm Desert

	Coachella Valley, United States Of America
	33.72 ° N 116.40 ° W
	239 ft
	Desert

BWh

Hot desert climate

BWii

Desert climate with extremely hot summer with extremely hot 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: BWii (Desert climate with extremely hot summer with extremely hot winter)

Desert, in other words arid, climate is characterized by extremely small precipitation. In Koppen classification it is further subdivided into types h and k. Deserts can be both hot and cold. It could be said that it basically includes areas, which although are not classified as polar regions, are in some aspects quite similar to them, especially by the almost complete absence of vegetation due to water insufficiency.

Arid regions have annual precipitation of less than 250 mm, but often much less and there are even areas where there are years with absolutely no rain at all.

Hot desert climate is most often found at around 30 ° latitude, bordering the subtropical zones. There is minimal cloudiness all year round and temperatures are extremely high, often above 40 °C, in some places even more than 45 °C. It in fact includes the warmest places on Earth, however, this is not to say it is not cold here at all. Due to the minimal cloud cover, it cools down very rapidly after sunset and sometimes even freezes in the early morning hours, just before sunrise. Hot deserts are found especially in Northern Africa, the most well-known is the largest desert on Earth, the Sahara desert. Then there are also hot deserts in the Middle East, Central and West Australia or some parts of Southwest U.S. and Southwest Africa.

Cold desert regions have a slightly misleading name because the word “cold” must be considered in context – summers here are still extremely hot and dry. In the winter however, temperatures drop quite significantly, sometimes well below freezing point. Cold desert regions are often found in places with higher altitude. Regions with this climate type are for example in Central Asia, the most well-known is the Mongolian Gobi desert.

extremely hot summer: warmest month with average temperature above 35 °C
extremely hot winter: coldest month with average temperature above 35 °C

Summary

72.97 °F
57.23 / 88.62

5.5 in
18 days

27.92 %

9 h 39 min/day

Temperature

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Min Temperature(°F)	42.3	45.6	48.8	54.1	60.4	67.0	75.2	74.3	68.1	59.4	49.2	42.3	57.2
Avg Temperature(°F)	56.0	59.6	64.2	70.5	77.6	85.2	91.7	90.5	85.0	75.3	64.0	56.0	73.0
Max Temperature (°F)	69.6	73.7	79.3	86.7	94.5	103.0	108.2	106.8	101.7	91.4	78.7	69.8	88.6
Range	27.3	28.1	30.5	32.6	34.1	36.0	33.0	32.5	33.6	32.0	29.5	27.5	31.4

	Max month	Min month	Yearly range
Min Temperature	Jul	Jan, Dec	32.9°F
Avg Temperature	Jul	Jan, Dec	35.7°F
Max Temperature	Jul	Jan	38.6°F
Temperature range	Jun	Jan	65.9°F

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
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	60.4	48.8	54.43	11.6	75.2	67.0	72.17	8.2	68.1	49.2	58.90	18.9	45.6	42.3	43.40	3.3
Avg Temperature	77.6	64.2	70.77	13.4	91.7	85.2	89.13	6.5	85.0	64.0	74.77	21.0	59.6	56.0	57.20	3.6
Max Temperature	94.5	79.3	86.83	15.2	108.2	103.0	106.00	5.2	101.7	78.7	90.60	23.0	73.7	69.6	71.03	4.1

Temperature

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Temperature (°F)	56.0	59.6	64.2	70.5	77.6	85.2	91.7	90.5	85.0	75.3	64.0	56.0	73.0

	Max month	Min month	Yearly range
Avg Temperature	Jul	Jan, Dec	35.7°F

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
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	77.6	64.2	70.77	13.4	91.7	85.2	89.13	6.5	85.0	64.0	74.77	21.0	59.6	56.0	57.20	3.6

Humidity

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Humidity (%)	35.0	34.0	28.0	26.0	25.0	22.0	25.0	24.0	24.0	26.0	30.0	36.0	73.0

	Max month	Min month	Yearly range
Avg Humidity	Dec	Jun	14.0%

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
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	28.0	25.0	26.33	3.0	25.0	22.0	23.67	3.0	30.0	24.0	26.67	6.0	36.0	34.0	35.00	2.0

Precipitation

	Month												Monthly average	Yearly total
	1	2	3	4	5	6	7	8	9	10	11	12	Monthly average	Yearly total
Average monthly precipitation (in)	1.1	1.0	0.6	0.2	0.1	0.1	0.2	0.3	0.3	0.3	0.4	1.0	0.5	5.5
Days with precipitation	4	3	2	1	0	0	1	1	1	1	1	3	2	18
Days with precipitation ratio (%)	12.9 4,27	10.7 3,25	6.5 2,29	3.3 1,29	0.0 0,31	0.0 0,30	3.2 1,30	3.2 1,30	3.3 1,29	3.2 1,30	3.3 1,29	9.7 3,28	4.9 4.93151,95.0685

	Max month	Min month	Max Season	Min Season	Yearly range
Average monthly precipitation	Jan	May, Jun	Winter	Summer	1.1in
Days with precipitation	Jan	May, Jun	Winter	Summer	4

	Month
	1	2	3	4	5	6	7	8	9	10	11	12
Average monthly precipitation (in)
Days with precipitation / 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)	0.6	0.1	0.5	0.8	0.3	0.1	0.2	0.5	0.4	0.3	0.1	1.0	1.1	1.0	0.1	3.1
Days with precipitation	2	0	2	3	1	0	1	2	1	1	0	3	4	3	1	10

Precipitation

	Month												Monthly average	Yearly total
	1	2	3	4	5	6	7	8	9	10	11	12	Monthly average	Yearly total
Average monthly precipitation (in)	1.1	1.0	0.6	0.2	0.1	0.1	0.2	0.3	0.3	0.3	0.4	1.0	0.5	5.5

	Max month	Min month	Max Season	Min Season	Yearly range
Average monthly precipitation	Jan	May, Jun	Winter	Summer	1.1in

	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)	0.6	0.1	0.5	0.8	0.3	0.1	0.2	0.5	0.4	0.3	0.1	1.0	1.1	1.0	0.1	3.1

Sun light / Length of day

	Average daily sunlight	Average day length	Max length of day	Min length of day	Sun light/Length of day
Jan	366 min 6 h 6 min	611 min 10 h 11 min 611,829	632 min 10 h 32 min (31.1.) 632,808	597 min 9 h 57 min (1.1.) 597,843	59.9 % 366,245
Feb	402 min 6 h 42 min	659 min 10 h 59 min 659,781	687 min 11 h 27 min (29.2.) 687,753	633 min 10 h 33 min (1.2.) 633,807	61.0 % 402,257
Mar	534 min 8 h 54 min	720 min 12 h 0 min 720,720	752 min 12 h 32 min (31.3.) 752,688	689 min 11 h 29 min (1.3.) 689,751	74.1 % 534,186
Apr	612 min 10 h 12 min	783 min 13 h 3 min 783,657	811 min 13 h 31 min (30.4.) 811,629	754 min 12 h 34 min (1.4.) 754,686	78.2 % 612,171
May	726 min 12 h 6 min	835 min 13 h 55 min 835,605	854 min 14 h 14 min (31.5.) 854,586	812 min 13 h 32 min (1.5.) 812,628	86.9 % 726,109
Jun	738 min 12 h 18 min	861 min 14 h 21 min 861,579	863 min 14 h 23 min (20.6.) 863,577	855 min 14 h 15 min (1.6.) 855,585	85.7 % 738,123
Jul	720 min 12 h 0 min	847 min 14 h 7 min 847,593	860 min 14 h 20 min (1.7.) 860,580	828 min 13 h 48 min (31.7.) 828,612	85.0 % 720,127
Aug	690 min 11 h 30 min	800 min 13 h 20 min 800,640	827 min 13 h 47 min (1.8.) 827,613	772 min 12 h 52 min (31.8.) 772,668	86.2 % 690,110
Sep	624 min 10 h 24 min	740 min 12 h 20 min 740,700	770 min 12 h 50 min (1.9.) 770,670	710 min 11 h 50 min (30.9.) 710,730	84.3 % 624,116
Oct	552 min 9 h 12 min	678 min 11 h 18 min 678,762	708 min 11 h 48 min (1.10.) 708,732	649 min 10 h 49 min (31.10.) 649,791	81.4 % 552,126
Nov	522 min 8 h 42 min	624 min 10 h 24 min 624,816	647 min 10 h 47 min (1.11.) 647,793	604 min 10 h 4 min (30.11.) 604,836	83.7 % 522,102
Dec	462 min 7 h 42 min	596 min 9 h 56 min 596,844	603 min 10 h 3 min (1.12.) 603,837	594 min 9 h 54 min (20.12.) 594,846	77.5 % 462,134
Year	627 min 10 h 27 min	730 min 12 h 10 min 730,710	863 min 14 h 23 min (20. 6.) 863,577	594 min 9 h 54 min (20. 12.) 594,846	86.0 % 627,102

	Mar, Apr, May				Jun, Jul, Aug				Sep, Oct, Nov				Dec, Jan, Feb
	Max	Min	Average	Sun light/day	Max	Min	Average	Sun light/day	Max	Min	Average	Sun light/day	Max	Min	Average	Sun light/day
Average sunlight (min/day)	726	534	624	80.1% 624,155	738	690	716	85.7% 716,120	624	522	566	83.2% 566,115	462	366	410	66.0% 410,212
Length of day	854	689	779	80.1% 624,155	863	772	836	85.7% 716,120	770	604	681	83.2% 566,115	687	594	622	66.0% 410,212

Length of day

	Average day length	Max length of day	Min length of day
Jan	611 min 10 h 11 min 611,829	632 min 10 h 32 min (Array.1.) 632,808	597 min 9 h 57 min (1.1.) 597,843
Feb	659 min 10 h 59 min 659,781	687 min 11 h 27 min (Array.2.) 687,753	633 min 10 h 33 min (1.2.) 633,807
Mar	720 min 12 h 0 min 720,720	752 min 12 h 32 min (Array.3.) 752,688	689 min 11 h 29 min (1.3.) 689,751
Apr	783 min 13 h 3 min 783,657	811 min 13 h 31 min (Array.4.) 811,629	754 min 12 h 34 min (1.4.) 754,686
May	835 min 13 h 55 min 835,605	854 min 14 h 14 min (Array.5.) 854,586	812 min 13 h 32 min (1.5.) 812,628
Jun	861 min 14 h 21 min 861,579	863 min 14 h 23 min (Array.6.) 863,577	855 min 14 h 15 min (1.6.) 855,585
Jul	847 min 14 h 7 min 847,593	860 min 14 h 20 min (Array.7.) 860,580	828 min 13 h 48 min (31.7.) 828,612
Aug	800 min 13 h 20 min 800,640	827 min 13 h 47 min (Array.8.) 827,613	772 min 12 h 52 min (31.8.) 772,668
Sep	740 min 12 h 20 min 740,700	770 min 12 h 50 min (Array.9.) 770,670	710 min 11 h 50 min (30.9.) 710,730
Oct	678 min 11 h 18 min 678,762	708 min 11 h 48 min (Array.10.) 708,732	649 min 10 h 49 min (31.10.) 649,791
Nov	624 min 10 h 24 min 624,816	647 min 10 h 47 min (Array.11.) 647,793	604 min 10 h 4 min (30.11.) 604,836
Dec	596 min 9 h 56 min 596,844	603 min 10 h 3 min (Array.12.) 603,837	594 min 9 h 54 min (20.12.) 594,846
Year	730 min 12 h 10 min 730,710	863 min 14 h 23 min (21. 6.) 863,577	594 min 9 h 54 min (21. 12.) 594,846