The humid subtropical monsoon climate of Nanjing is characterized by temperate weather; four distinct seasons, hot summer and cold winter; simultaneous advent of adequate precipitation, sunshine and heat. Subject to the influence of the Eurasian continental air mass, the weather in winter is sunny, cold and dry. In early summer with the impact of the frontal rain, Nanjing enters into the rainy season with remarkable increase in precipitation and the frequency of downpours and rainstorms. The height of summer follows with sunny weather and droughts. Spring and autumn mark the turn of winter and summer and are marked by dry and cool weathers. A frost-free period of about 225 days is good for crop growth. At times might occur floods, droughts, rainstorms, lingering rains, typhoons, high temperatures, strong convective weathers (including thunderstorms, squall lines, hails, etc.), cold waves, low temperatures, frosts, high winds, fogs and other disasters.

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pressure (hPa)	10267	10245	10204	10145	10101	10054	10036	10055	10129	10195	10241	10270

Pressure (hPa)
10267	10245	10204	10145	10101	10054	10036	10055	10129	10195	10241	10270
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

fig.1 monthly mean pressure

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Temp (oF)	36.3	39.5	47.6	59.3	68.9	75.9	82	81.5	73	62.7	50.7	40.1
Temp (oC)	2.4	4.2	8.7	15.2	20.5	24.4	27.8	27.5	22.8	17.1	10.4	4.5

Temperature (oC|oF)
2.4 oC 36.3 oF	4.2 oC 39.5 oF	8.7 oC 47.6 oF	15.2 oC 59.3 oF	20.5 oC 68.9 oF	24.4 oC 75.9 oF	27.8 oC 82 oF	27.5 oC 81.5 oF	22.8 oC 73 oF	17.1 oC 62.7 oF	10.4 oC 50.7 oF	4.5 oC 40.1 oF
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

fig.2 monthly mean temperature

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min Temp (oF)	30	33	40.6	51	60.6	69.2	76.2	75.5	66.5	55.2	42.9	32.7
Min Temp (oC)	-1.1	.6	4.8	10.6	15.9	20.7	24.6	24.2	19.2	12.9	6.1	.4
Max Temp (oF)	44.6	47.8	56.1	68.5	78	83.8	89.4	89	81.1	71.9	60.6	50
Max Temp (oC)	7	8.8	13.4	20.3	25.6	28.8	31.9	31.7	27.3	22.2	15.9	10

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min Temp (oF)	8.4	12.9	23	32	44.6	54.8	62.2	62.9	45.8	33	20.6	8.4
Min Temp (oC)	-13.1	-10.6	-5	0	7	12.7	16.8	17.2	7.7	.6	-6.3	-13.1
Max Temp (oF)	69.8	79.5	85.1	91.9	96.2	100.2	103.4	100.7	99.6	90.8	83.4	71.4
Max Temp (oC)	21	26.4	29.5	33.3	35.7	37.9	39.7	38.2	37.6	32.7	28.6	21.9

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hunidity (%)	76	74	74	73	74	79	81	81	79	77	77	74

Hunidity (%)
76	74	74	73	74	79	81	81	79	77	77	74
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

fig.3 monthly mean hunidity

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hunidity (%)	10	8	9	11	14	18	31	31	20	14	4	13

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	37.4	47.1	81.8	73.4	102.1	193.4	185.5	129.2	72.1	65.1	50.8	24.5
Days (Precipitation<0.1mm)	8.1	9.1	12.1	10.4	10.4	11.3	12.4	11.3	8.9	8.2	7.4	5.7
Days (Precipitation<10mm)	1.2	1.6	2.9	2.7	3	4.7	4.9	3.8	2.1	2.2	1.6	.7
Days (Precipitation<25mm)	0	.2	.7	.7	1.1	2.5	2.1	1.7	.8	.5	.5	.1
Days (Precipitation<50mm)	0	0	0	.1	.4	1	.9	.4	.2	.2	.1	0

Precipitation (mm)
37.4	47.1	81.8	73.4	102.1	193.4	185.5	129.2	72.1	65.1	50.8	24.5
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

fig.4 monthly mean precipitation

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	32.7	32.2	87	51.8	140.5	172.5	179.3	140.5	61.9	78.8	54.7	30.5

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Wind Speed (m/s)	2.4	2.7	2.9	2.8	2.6	2.6	2.5	2.6	2.3	2.2	2.2	2.2

Wind Speed (m/s)
2.4	2.7	2.9	2.8	2.6	2.6	2.5	2.6	2.3	2.2	2.2	2.2
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

fig.5 monthly mean wind speed

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Wind Speed (m/s)	15	14.7	15.8	21	15.7	25	16	18.5	18.7	15	14.1	13

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Duration (hour)	129.1	123.3	136.1	168.1	194	171.9	205.6	214.7	167.2	169.1	153.5	150.2

Duration (hour)
129.1	123.3	136.1	168.1	194	171.9	205.6	214.7	167.2	169.1	153.5	150.2
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

fig.5 monthly mean sunshine duration

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Percentage (%)	41	40	37	44	46	41	47	52	45	48	49	48

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.

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