Changchun in the heart of the Songliao Plain in Northeast China's, a vast flat extension of land with elevations ranging from 250 to 350 meters at the transitional belt between the humid eastern mountains and the semi-arid western plains, has a semi-humid temperate continental monsoon climate. Its characteristics are: four distinct seasons, short, dry and windy springs; warm and rainy summers with few days of extreme high temperature; cool autumn with large temperature difference between day and night; and long cold winters. For five months of the year, the mean temperature is below 0 C. In spring, temperature recovers slowly: the monthly mean temperature does not rise above 0 C until April. Spring is the also season strong winds visit most frequently. The warm weather and green shades in summer have earned it the fame of "Spring City of North Borders". In the warmest month of July, the mean temperature is only 23.1 C. The humid summer has rich precipitation: there is a 350-400 mm precipitation from June to August, over 60 percent of the yearly total. With a weaker wind force in autumn than in spring, it may remain sunny and warm for several consecutive days but day-night temperature varies greatly. The winter is lastingly cold: the mean temperature drops to -15.1 C in January when there is little precipitation, dry climate, sometimes blizzards or even snowstorms.

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pressure (hPa)	9951	9935	9899	9834	9803	9776	9770	9804	9857	9902	9933	9946

Pressure (hPa)
9951	9935	9899	9834	9803	9776	9770	9804	9857	9902	9933	9946
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)	4.8	12.7	28.4	46.2	59.5	69	73.5	70.8	59.7	44.6	25.8	10.7
Temp (oC)	-15.1	-10.7	-2	7.9	15.3	20.6	23.1	21.6	15.4	7	-3.4	-11.8

Temperature (oC|oF)
-15.1 oC 4.8 oF	-10.7 oC 12.7 oF	-2 oC 28.4 oF	7.9 oC 46.2 oF	15.3 oC 59.5 oF	20.6 oC 69 oF	23.1 oC 73.5 oF	21.6 oC 70.8 oF	15.4 oC 59.7 oF	7 oC 44.6 oF	-3.4 oC 25.8 oF	-11.8 oC 10.7 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)	-3.5	3.5	18.6	35.4	48.7	59.9	66.3	63.1	50.1	35.4	17.9	3.2
Min Temp (oC)	-19.7	-15.8	-7.4	1.9	9.3	15.5	19.1	17.3	10.1	1.9	-7.8	-16
Max Temp (oF)	14.7	23.1	38.6	57.3	70.5	78.9	81.6	79.5	70.3	55	35	20.1
Max Temp (oC)	-9.6	-4.9	3.7	14.1	21.4	26.1	27.6	26.4	21.3	12.8	1.7	-6.6

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min Temp (oF)	-27.4	-18.6	-17.4	10	26.4	40.1	51.9	43.3	29.4	7.8	-12.5	-23.8
Min Temp (oC)	-33	-28.1	-27.4	-12.2	-3.1	4.5	11.1	6.3	-1.4	-13.4	-24.7	-31
Max Temp (oF)	40.2	58.1	67.1	82.9	95.3	96.2	94.1	93.7	87	82	69.2	53
Max Temp (oC)	4.6	14.5	19.5	28.3	35.2	35.7	34.5	34.3	30.6	27.8	20.7	11.7

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hunidity (%)	66	61	53	49	51	65	78	79	69	61	63	66

Hunidity (%)
66	61	53	49	51	65	78	79	69	61	63	66
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 (%)	13	6	2	3	3	6	21	28	13	8	11	17

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	3.2	4.5	12.3	21.9	49.9	99.7	161.1	121.7	51.9	28.9	10.3	5
Days (Precipitation<0.1mm)	3.7	4.6	5.5	7.1	9.8	13.6	15.4	12.4	8.8	6.7	5.7	5.4
Days (Precipitation<10mm)	0	0	.2	.4	1.4	3	4.8	3.9	1.6	.7	.1	0
Days (Precipitation<25mm)	0	0	0	.1	.3	.9	1.6	1.3	.2	.2	0	0
Days (Precipitation<50mm)	0	0	0	0	0	.1	.5	.4	0	0	0	0

Precipitation (mm)
3.2	4.5	12.3	21.9	49.9	99.7	161.1	121.7	51.9	28.9	10.3	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)	7.5	8.9	-20	34.6	37	65.3	130.4	122	54.6	44.7	14.5	15.7

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Wind Speed (m/s)	3.6	3.6	4.4	5.3	4.8	3.7	3.1	2.9	3.2	3.9	4.1	3.7

Wind Speed (m/s)
3.6	3.6	4.4	5.3	4.8	3.7	3.1	2.9	3.2	3.9	4.1	3.7
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)	24	25.3	23	28.3	31	23.3	15.7	16.3	18.3	21.3	20.3	21

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Duration (hour)	188.5	195.3	239.2	241.3	261.2	247.6	220.3	235.2	234.8	214.3	174.6	164.3

Duration (hour)
188.5	195.3	239.2	241.3	261.2	247.6	220.3	235.2	234.8	214.3	174.6	164.3
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 (%)	66	66	65	60	58	54	47	54	63	63	60	60

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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