Chapel Hill

	North Carolina, United States Of America
	36.00 ° N 79.00 ° W
	499 ft
	Warm temperate moist forest

Cfa

Humid subtropical climate

Cfak

Subtropical climate with evenly distributed precipitation with hot summer with cool winter

Traditional Koppen classification: Cfa (Humid subtropical climate)

Official definition:

C – temperature of warmest month greater than or equal to 10 °C and temperature of coldest month less than 18 °C, but higher than -3 °C
f – precipitation is relatively evenly distributed throughout the year and do not fulfill classification criteria for s or w type
a - temperature of warmest month above 22 °C

The Cfa climate type is typical for areas on the Eastern coasts of continents, mostly between 20th and 30th latitude. The average temperature of the warmest month is higher than 22 °C and the temperature throughout the year range from usually -3 to 18 °C. In the winter, however, in some cases it can be well below freezing point.

Precipitation is relatively evenly distributed during the entire year. Humidity tends to be higher during the summer half year, when the conditions resemble the humid tropical climate. The total annual rainfall can be quite variable, most commonly between 650 and 2500 mm. Thunderstorms during the summer are frequent.

Cfa climate type can be found for example in the Southeastern USA, Northern part of Argentina, Uruguay and Southern part of Brazil, Southern Japan and South of China.

Modern Trewartha classification: Cfak (Subtropical climate with evenly distributed precipitation with hot summer with cool 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 Cf subtype is characterized by precipitation evenly distributed throughout the year.

It can be found for example in Eastern part of South America, in large areas in Southeast U.S., Northern Italy, the Southwest tip of Russia, in Southeast Asia, some parts of Japan or East coast of Australia.

hot summer: warmest month with average temperature between 23 and 28 °C
cool winter: coldest month with average temperature between 0 and 10 °C

Summary

58 °F
46 / 70

46.0 in

Temperature

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Min Temperature(°F)	26.0	28.0	36.0	44.0	53.0	61.0	65.0	64.0	57.0	45.0	37.0	29.0	46.0
Avg Temperature(°F)	37.0	40.0	49.0	58.0	66.0	73.0	77.0	76.0	69.0	58.0	50.0	41.0	58.0
Max Temperature (°F)	49.0	52.0	62.0	71.0	78.0	85.0	89.0	87.0	82.0	72.0	63.0	53.0	70.0
Range	23.0	24.0	26.0	27.0	25.0	24.0	24.0	23.0	25.0	27.0	26.0	24.0	24.0

	Max month	Min month	Annual range
Min Temperature	Jul	Jan	39.0°F
Avg Temperature	Jul	Jan	40.0°F
Max Temperature	Jul	Jan	40.0°F
Temperature range	Apr, Oct	Jan, Aug	63.0°F

													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	53.0	36.0	44.33	17.0	65.0	61.0	63.33	4.0	57.0	37.0	46.33	20.0	29.0	26.0	27.67	3.0
Avg Temperature	66.0	49.0	57.67	17.0	77.0	73.0	75.33	4.0	69.0	50.0	59.00	19.0	41.0	37.0	39.33	4.0
Max Temperature	78.0	62.0	70.33	16.0	89.0	85.0	87.00	4.0	82.0	63.0	72.33	19.0	53.0	49.0	51.33	4.0

Temperature

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
Avg Temperature (°F)	37.0	40.0	49.0	58.0	66.0	73.0	77.0	76.0	69.0	58.0	50.0	41.0	58.0

	Max month	Min month	Annual range
Avg Temperature	Jul	Jan	40.0°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	66.0	49.0	57.67	17.0	77.0	73.0	75.33	4.0	69.0	50.0	59.00	19.0	41.0	37.0	39.33	4.0

Humidity

	Month												Average
	1	2	3	4	5	6	7	8	9	10	11	12	Average
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	58.0

	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	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	-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	Monthly average	Annual total
Average monthly precipitation (in)	3.7	3.9	4.2	3.2	4.5	4.4	4.1	4.5	3.2	3.5	3.5	3.5	3.8	46.0
Wetdays	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-9999	-119988
Wetdays ratio (%)	-32254.8 -9999,10030	-35710.7 -9999,10027	-32254.8 -9999,10030	-33330.0 -9999,10029	-32254.8 -9999,10030	-33330.0 -9999,10029	-32254.8 -9999,10030	-32254.8 -9999,10030	-33330.0 -9999,10029	-32254.8 -9999,10030	-33330.0 -9999,10029	-32254.8 -9999,10030	-32873.4 -32873.4,32973.4

	Max month	Min month	Max Season	Min Season	Annual range
Average monthly precipitation	May	Sep	Summer	Autumn	1.3in
Wetdays	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	Autumn	Spring, Summer, Winter	0

	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)	4.5	3.2	1.3	11.9	4.5	4.1	0.4	12.9	3.5	3.2	0.3	10.2	3.9	3.5	0.4	11.1
Wetdays	-9999	-9999	0	-29997	-9999	-9999	0	-29997	58	-9999	10057	-9891	-9999	-9999	0	-29997

Precipitation

	Month												Monthly average	Annual total
	1	2	3	4	5	6	7	8	9	10	11	12	Monthly average	Annual total
Average monthly precipitation (in)	3.7	3.9	4.2	3.2	4.5	4.4	4.1	4.5	3.2	3.5	3.5	3.5	3.8	46.0

	Max month	Min month	Max Season	Min Season	Annual range
Average monthly precipitation	May	Sep	Summer	Autumn	1.3in

	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)	4.5	3.2	1.3	11.9	4.5	4.1	0.4	12.9	3.5	3.2	0.3	10.2	3.9	3.5	0.4	11.1

Sunlight / Day length

			Max day length	Min day length	Sunlight/Day length
Jan	-9999 min -167 h 21 min	601 min 10 h 1 min 601,839	623 min 10 h 23 min (31.1.) 623,817	585 min 9 h 45 min (1.1.) 585,855	-1663.8 % -9999,10600
Feb	-9999 min -167 h 21 min	653 min 10 h 53 min 653,787	683 min 11 h 23 min (29.2.) 683,757	625 min 10 h 25 min (1.2.) 625,815	-1531.2 % -9999,10652
Mar	-9999 min -167 h 21 min	720 min 11 h 60 min 720,720	754 min 12 h 34 min (31.3.) 754,686	685 min 11 h 25 min (1.3.) 685,755	-1389.4 % -9999,10719
Apr	-9999 min -167 h 21 min	788 min 13 h 8 min 788,652	818 min 13 h 38 min (30.4.) 818,622	756 min 12 h 36 min (1.4.) 756,684	-1269.0 % -9999,10787
May	-9999 min -167 h 21 min	845 min 14 h 5 min 845,595	865 min 14 h 25 min (31.5.) 865,575	820 min 13 h 40 min (1.5.) 820,620	-1183.2 % -9999,10844
Jun	-9999 min -167 h 21 min	873 min 14 h 33 min 873,567	876 min 14 h 36 min (20.6.) 876,564	866 min 14 h 26 min (1.6.) 866,574	-1145.2 % -9999,10872
Jul	-9999 min -167 h 21 min	858 min 14 h 18 min 858,582	873 min 14 h 33 min (1.7.) 873,567	838 min 13 h 58 min (31.7.) 838,602	-1165.6 % -9999,10857
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	776 min 12 h 56 min (31.8.) 776,664	-1238.7 % -9999,10806
Sep	-9999 min -167 h 21 min	742 min 12 h 22 min 742,698	774 min 12 h 54 min (1.9.) 774,666	709 min 11 h 49 min (30.9.) 709,731	-1347.9 % -9999,10741
Oct	-9999 min -167 h 21 min	674 min 11 h 14 min 674,766	707 min 11 h 47 min (1.10.) 707,733	642 min 10 h 42 min (31.10.) 642,798	-1483.9 % -9999,10673
Nov	-9999 min -167 h 21 min	615 min 10 h 15 min 615,825	640 min 10 h 40 min (1.11.) 640,800	593 min 9 h 53 min (30.11.) 593,847	-1626.9 % -9999,10614
Dec	-9999 min -167 h 21 min	585 min 9 h 45 min 585,855	592 min 9 h 52 min (1.12.) 592,848	582 min 9 h 42 min (20.12.) 582,858	-1710.2 % -9999,10584
Year	-10832 min -181 h 28 min	730 min 12 h 10 min 730,710	876 min 14 h 36 min (19. 6.) 876,564	582 min 9 h 42 min (19. 12.) 582,858	-1483.6 % -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	-1275.1% -9999,10783	-9999	-9999	-9999	-1182.2% -9999,10845	-9999	-9999	-9,999	-1477.6% -9999,10676	-9999	-9999	-9999	-1633.8% -9999,10611
Day length	865	685	784	-1275.1% -9999,10783	876	776	846	-1182.2% -9999,10845	774	593	677	-1477.6% -9999,10676	683	582	612	-1633.8% -9999,10611

Day length

		Max day length	Min day length
Jan	601 min 10 h 1 min 601,839	623 min 10 h 23 min (Array.1.) 623,817	585 min 9 h 45 min (1.1.) 585,855
Feb	653 min 10 h 53 min 653,787	683 min 11 h 23 min (Array.2.) 683,757	625 min 10 h 25 min (1.2.) 625,815
Mar	720 min 11 h 60 min 720,720	754 min 12 h 34 min (Array.3.) 754,686	685 min 11 h 25 min (1.3.) 685,755
Apr	788 min 13 h 8 min 788,652	818 min 13 h 38 min (Array.4.) 818,622	756 min 12 h 36 min (1.4.) 756,684
May	845 min 14 h 5 min 845,595	865 min 14 h 25 min (Array.5.) 865,575	820 min 13 h 40 min (1.5.) 820,620
Jun	873 min 14 h 33 min 873,567	876 min 14 h 36 min (Array.6.) 876,564	866 min 14 h 26 min (1.6.) 866,574
Jul	858 min 14 h 18 min 858,582	873 min 14 h 33 min (Array.7.) 873,567	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	776 min 12 h 56 min (31.8.) 776,664
Sep	742 min 12 h 22 min 742,698	774 min 12 h 54 min (Array.9.) 774,666	709 min 11 h 49 min (30.9.) 709,731
Oct	674 min 11 h 14 min 674,766	707 min 11 h 47 min (Array.10.) 707,733	642 min 10 h 42 min (31.10.) 642,798
Nov	615 min 10 h 15 min 615,825	640 min 10 h 40 min (Array.11.) 640,800	593 min 9 h 53 min (30.11.) 593,847
Dec	585 min 9 h 45 min 585,855	592 min 9 h 52 min (Array.12.) 592,848	582 min 9 h 42 min (20.12.) 582,858
Year	730 min 12 h 10 min 730,710	876 min 14 h 36 min (21. 6.) 876,564	582 min 9 h 42 min (21. 12.) 582,858

	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	865	685	784	876	776	846	774	593	677	683	582	612

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