Climate

It has a tropical monsoon type of climate; from May-Sep the south monsoon starts, and the country is dominated by south to southeasterly winds. From Oct-April, the north monsoon is strong with northerly to northeasterly winds. In between the seasons the winds are light and variable. Vietnam has a single rainy season during the south monsoon (May-Sep). Rainfall is uncommon and light during the remainder of the year. Rainfall is abundant, with annual rainfall exceeding 1000mm almost everywhere. Annual rainfall is even higher in the hills, especially those facing the sea, in the range of 2000-2500mm.

Vietnam Weather Averages

	Average Minimum Temperatures in Vietnam (°C)	Average Maximum Temperature in Vietnam (°C)	Vietnam Average Temperature (°C)	Average Sea Temp (°C)	Average Precipitation/ Rainfall (mm)	Wet Days (>0.1 mm)	Average Sunlight Hours/ Day	Relative Humidity (%)	Average Wind Speed in Vietnam (Beaufort)	Average Number of Days with Frost
Weather in Vietnam in January	13	20	17	-	18	7	1.4	68	-	0	Average Temperature in Vietnam in January
Weather in Vietnam in February	14	21	18	-	28	13	1.4	70	-	0	Average Temperature in Vietnam in February
Weather in Vietnam in March	17	23	20	-	38	15	1.3	76.0	-	0	Average Temperature in Vietnam in March
Weather in Vietnam in April	21	28	24	-	81	14	2.2	75	-	0	Average Temperature in Vietnam in April
Weather in Vietnam in May	23	32	28	-	196	15	4.2	69	-	0	Average Temperature in Vietnam in May
Weather in Vietnam in June	26	33	30	-	237	14	5.0	71	-	0	Average Temperature in Vietnam in June
Weather in Vietnam in July	26	33	29	-	323	15	4.8	72	-	0	Average Temperature in Vietnam in July
Weather in Vietnam in August	26	32	29	-	343	16	4.2	75	-	0	Average Temperature in Vietnam in August
Weather in Vietnam in September	24	31	28	-	254	14	4.3	73	-	0	Average Temperature in Vietnam in September
Weather in Vietnam in October	22	29	25	-	99	9	4.2	69	-	0	Average Temperature in Vietnam in October
Weather in Vietnam in November	18	26	22	-	43	7	3.2	68	-	0	Average Temperature in Vietnam in November
Weather in Vietnam in December	15	22	19	-	20	7	2.1	67	-	0	Average Temperature in Vietnam in December

Graph from: http://www.climatetemp.info/vietnam/