Weather data information for Chiang Rai

Climate table for Chiang Rai - northern Thailand. Information provided by Thailand Meterological Department.

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	All
Mean temperature (^oC)
Daily	19.1	21.2	24.4	26.9	27.0	27.1	26.5	26.2	25.9	24.7	22.0	18.9	24.2
Morning Mininum	12.1	13.0	16.4	20.1	22.3	23.2	23.1	22.9	22.3	20.6	17.0	12.9	18.8
Extreme Min	1.5	7.0	6.0	14.6	18.0	20.5	19.0	19.5	16.4	11.0	5.0	1.5	1.5
Afternoon Maximun	28.1	31.0	33.8	34.8	33.1	31.9	30.9	30.7	30.8	30.0	28.3	26.6	30.8
Extreme Max	33	36.3	39.3	40.7	40.8	39.6	36.2	35.6	37	34.3	33.8	32.9	40.8
Mean relative humidity(%)
at 0700 am.	94	91	86	86	89	90	92	93	94	94	94	94	91
at 0100 pm.	51	40	36	44	58	65	69	71	69	65	59	54	57
Surface wind
Mean Speed (km./hr.)	1.5	2.0	2.4	3.2	3.2	3.2	3.0	2.5	2.2	2.4	2.2	2.0	2.5
Direction	south	south	south	south	south	south	south	south	south	noretheast	noretheast	noretheast	south
Mean rainfall
Amount (mm./month)	11.2	12.2	20.9	94.6	194.7	194.8	319.1	377.7	271.2	130.7	56.6	18.5	1702.2
Rainy Day (day/month)	1.5	1.4	2.8	10.1	17.5	18.7	22.4	23.5	17.5	11	5.1	2.1	133.6
Heavy Rainy Day (day/month) Greater Than 35 mm./day	0	0.1	0.1	0.8	0.9	1.1	2.0	3.0	2.2	0.6	0.6	0.1	11.3
Visibility (km.)
Time 07.00	5.2	5.6	3.1	6	11.2	11.8	11.1	10.2	8.3	7.4	6.9	5.2	7.7
Daily	7.9	7	4.2	7.1	11.6	12.1	11.6	11.0	10.5	10.1	10	8.9	9.3
Mean sunshine duration
Daily	8.3	8.8	7.6	8	7	5.1	4.2	4.4	5.4	6.3	6.3	7.3	6.6

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