Climate
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Like other parts of Papua New Guinea, Madang has a tropical rainforest climate (Köppen climate classification Af), with significant rainfall throughout the year and the temperature being hot year-round. The average annual high temperature is 30.6 °C (87.1 °F), while the average annual low temperature is 23.8 °C (74.8 °F). Temperatures remain consistent throughout the year, but there is variation between the month. February has the highest average high at 31.2 °C (88.2 °F). Multiple months have the highest average low at 23.9 °C (75.0 °F). July and August has the lowest average high at 30.2 °C (86.4 °F). July has the lowest average low at 23.4 °C (74.1 °F).
Madang receives 3,106.8 millimetres (122.31 in) of rain over 224 precipitation days, with abundant rainfall throughout the year but a wetter and drier season. April, the wettest month, receives 389.4 millimetres (15.33 in) of rainfall over 23 precipitation days on average. September receives the least rainfall of any month, receiving 82.6 millimetres (3.25 in) of rainfall over 11 precipitation days. Madang receives 2184 hours of sunshine annually on average, with the sunshine being distributed fairly evenly across the year, with a noticeable dip in the wetter months. September receives the most sunshine, while March receives the least.
Climate data for Madang
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Record high °C (°F)
33.2(91.8)
33.3(91.9)
33.3(91.9)
33.7(92.7)
32.2(90.0)
32.2(90.0)
31.5(88.7)
31.7(89.1)
33.4(92.1)
31.7(89.1)
32.5(90.5)
33.6(92.5)
33.7(92.7)
Mean daily maximum °C (°F)
30.8(87.4)
30.6(87.1)
30.6(87.1)
30.6(87.1)
30.7(87.3)
30.4(86.7)
30.2(86.4)
30.2(86.4)
30.5(86.9)
30.9(87.6)
31.2(88.2)
30.9(87.6)
30.6(87.1)
Mean daily minimum °C (°F)
23.9(75.0)
23.8(74.8)
23.9(75.0)
23.8(74.8)
23.9(75.0)
23.7(74.7)
23.4(74.1)
23.7(74.7)
23.6(74.5)
23.8(74.8)
23.9(75.0)
23.9(75.0)
23.8(74.8)
Record low °C (°F)
21.0(69.8)
20.7(69.3)
20.8(69.4)
21.1(70.0)
20.1(68.2)
19.9(67.8)
20.0(68.0)
18.9(66.0)
20.8(69.4)
20.3(68.5)
20.0(68.0)
19.4(66.9)
18.9(66.0)
Average rainfall mm (inches)
343.8(13.54)
292.0(11.50)
329.8(12.98)
389.4(15.33)
343.4(13.52)
186.4(7.34)
144.2(5.68)
93.8(3.69)
82.6(3.25)
239.2(9.42)
280.2(11.03)
382.0(15.04)
3,106.8(122.31)
Average rainy days
23
21
23
23
21
18
15
12
11
15
19
23
224
Average relative humidity (%)
85
85
85
85
85
84
84
82
83
83
84
84
84
Mean monthly sunshine hours
160
140
144
162
193
195
198
210
227
210
185
160
2,184
Source 1: World Meteorological Organisation
Source 2: Deutscher Wetterdienst (extremes, humidity and sun)