Raleigh/ Raleigh-Durham
North Carolina, United States Of America
35.87 ° N
78.78 ° W
440 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

59 °F
48 / 70
41.5 in


Temperature
+

Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Min Temperature(°F) 29.031.039.046.055.064.068.067.061.048.040.032.0 48.0
Avg Temperature(°F) 39.042.050.059.067.074.078.077.071.060.051.043.0 59.0
Max Temperature (°F) 49.053.062.072.079.085.088.087.081.072.063.053.0 70.0
Range 20.022.023.026.024.021.020.020.020.024.023.021.0 22.0


Max month Min month Annual range
Min Temperature Jul Jan 39.0°F
Avg Temperature Jul Jan 39.0°F
Max Temperature Jul Jan 39.0°F
Temperature range Apr Jan, Jul, Aug, Sep 59.0°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 55.0 39.0 46.67 16.0 68.0 64.0 66.33 4.0 61.0 40.0 49.67 21.0 32.0 29.0 30.67 3.0
Avg Temperature 67.0 50.0 58.67 17.0 78.0 74.0 76.33 4.0 71.0 51.0 60.67 20.0 43.0 39.0 41.33 4.0
Max Temperature 79.0 62.0 71.00 17.0 88.0 85.0 86.67 3.0 81.0 63.0 72.00 18.0 53.0 49.0 51.67 4.0

Temperature
+

Month Average
1 2 3 4 5 6 7 8 9 10 11 12
Avg Temperature (°F) 39.042.050.059.067.074.078.077.071.060.051.043.0 59.0


Max month Min month Annual range
Avg Temperature Jul Jan 39.0°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 67.0 50.0 58.67 17.0 78.0 74.0 76.33 4.0 71.0 51.0 60.67 20.0 43.0 39.0 41.33 4.0


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 59.0


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) 3.53.73.82.63.93.74.04.03.22.93.03.2 3.5 41.5
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 Jul, Aug Apr Summer Autumn 1.4in
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) 3.9 2.6 1.3 10.3 4.0 3.7 0.3 11.7 3.2 2.9 0.3 9.1 3.7 3.2 0.5 10.4
Wetdays -9999 -9999 0 -29997 -9999 -9999 0 -29997 60 -9999 10059 -9888 -9999 -9999 0 -29997

Precipitation
+

Month Monthly average Annual total
1 2 3 4 5 6 7 8 9 10 11 12
Average monthly precipitation (in) 3.53.73.82.63.93.74.04.03.22.93.03.2 3.5 41.5


Max month Min month Max Season Min Season Annual range
Average monthly precipitation Jul, Aug Apr Summer Autumn 1.4in
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) 3.9 2.6 1.3 10.3 4.0 3.7 0.3 11.7 3.2 2.9 0.3 9.1 3.7 3.2 0.5 10.4


Sunlight / Day length
+

Max day length Min day length Sunlight/Day length
Jan -9999 min
-167 h 21 min 		602 min
10 h 2 min
602,838 		623 min
10 h 23 min
(31.1.)
623,817 		586 min
9 h 46 min
(1.1.)
586,854 		-1662.1 %
-9999,10601
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 		-1530.3 %
-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 		686 min
11 h 26 min
(1.3.)
686,754 		-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 		-1269.5 %
-9999,10787
May -9999 min
-167 h 21 min 		844 min
14 h 4 min
844,596 		865 min
14 h 25 min
(31.5.)
865,575 		820 min
13 h 40 min
(1.5.)
820,620 		-1184.1 %
-9999,10843
Jun -9999 min
-167 h 21 min 		872 min
14 h 32 min
872,568 		875 min
14 h 35 min
(20.6.)
875,565 		866 min
14 h 26 min
(1.6.)
866,574 		-1146.2 %
-9999,10871
Jul -9999 min
-167 h 21 min 		857 min
14 h 17 min
857,583 		872 min
14 h 32 min
(1.7.)
872,568 		837 min
13 h 57 min
(31.7.)
837,603 		-1166.5 %
-9999,10856
Aug -9999 min
-167 h 21 min 		807 min
13 h 27 min
807,633 		835 min
13 h 55 min
(1.8.)
835,605 		776 min
12 h 56 min
(31.8.)
776,664 		-1239.3 %
-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 		-1348.0 %
-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 		-1483.4 %
-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 		594 min
9 h 54 min
(30.11.)
594,846 		-1625.4 %
-9999,10614
Dec -9999 min
-167 h 21 min 		585 min
9 h 45 min
585,855 		593 min
9 h 53 min
(1.12.)
593,847 		583 min
9 h 43 min
(20.12.)
583,857 		-1708.1 %
-9999,10584
Year -10832 min
-181 h 28 min 		730 min
12 h 10 min
730,710 		875 min
14 h 35 min
(20. 6.)
875,565 		583 min
9 h 43 min
(20. 12.)
583,857 		-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 -1275.6%
-9999,10783 		-9999 -9999 -9999 -1183.1%
-9999,10844 		-9999 -9999 -9,999 -1477.0%
-9999,10676 		-9999 -9999 -9999 -1632.3%
-9999,10612
Day length 865 686 784 875 776 845 774 594 677 683 583 613

Day length
+

Max day length Min day length
Jan 602 min
10 h 2 min
602,838 		623 min
10 h 23 min
(Array.1.)
623,817 		586 min
9 h 46 min
(1.1.)
586,854
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 		686 min
11 h 26 min
(1.3.)
686,754
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 844 min
14 h 4 min
844,596 		865 min
14 h 25 min
(Array.5.)
865,575 		820 min
13 h 40 min
(1.5.)
820,620
Jun 872 min
14 h 32 min
872,568 		875 min
14 h 35 min
(Array.6.)
875,565 		866 min
14 h 26 min
(1.6.)
866,574
Jul 857 min
14 h 17 min
857,583 		872 min
14 h 32 min
(Array.7.)
872,568 		837 min
13 h 57 min
(31.7.)
837,603
Aug 807 min
13 h 27 min
807,633 		835 min
13 h 55 min
(Array.8.)
835,605 		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 		594 min
9 h 54 min
(30.11.)
594,846
Dec 585 min
9 h 45 min
585,855 		593 min
9 h 53 min
(Array.12.)
593,847 		583 min
9 h 43 min
(20.12.)
583,857
Year 730 min
12 h 10 min
730,710 		875 min
14 h 35 min
(21. 6.)
875,565 		583 min
9 h 43 min
(21. 12.)
583,857



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 865 686 784 875 776 845 774 594 677 683 583 613

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