Climate:

Bhutan has four seasons.

Southern Bhutan has a hot, humid sub-tropical climate with temperatures between 15-30°C year-round. The central region experiences cooler temperatures, temperate forests, warm summers, and cool, dry winters. The northern areas are cold in winter, with snow-covered mountain peaks and cool lower areas due to high altitude.

In Bhutan, spring is usually dry and starts in early March, lasting until May. It’s a time for flowers to bloom and birds to appear. The temperature is between 17–22°C. In lower areas like Punakha and Wangdiphodrang (1300 meters), the temperature is around 28–30°C.

Summer begins in mid-June with occasional rain and continues until late August. The rain is often heavy, especially in the southern parts of Bhutan. Temperatures range from 20–30°C, and it gets cooler in the evenings.

Autumn lasts from late September to November and brings sunny days with some early snowfall in higher areas. Temperatures are between 20–25°C, and the nights are cold.

Winter starts in late November and lasts until March. There is frost in many areas, and snowfall is common at elevations above 3000 meters. Eastern Bhutan is warmer than Western Bhutan. Winter is dry, with temperatures around 16°C in the valleys and clear blue skies. Nights can be very cold, sometimes below freezing.

Average Temperatures in Bhutan recorded from the valley floor (in Celsius).

Month	Celsius	Paro	Thimphu	Punakha	Trongsa	Bumthang	Mongar	Tashigang
January	Minimum	-6	-3	4	0	-5	8	10
	Maximum	9	12	17	13	11	16	20
February	Minimum	1	2	8	4	-1	8	12
	Maximum	13	14	19	14	10	16	22
March	Minimum	1	4	10	4	3	12	14
	Maximum	15	16	23	17	16	20	25
April	Minimum	4	7	13	7	4	14	17
	Maximum	18	20	26	20	19	23	28
May	Minimum	10	13	17	11	9	17	22
	Maximum	24	23	29	21	21	25	30
June	Minimum	14	15	20	14	13	19	22
	Maximum	25	24	29	22	23	26	31
July	Minimum	15	16	20	15	14	20	23
	Maximum	27	26	30	25	24	17	32
August	Minimum	14	16	20	15	14	19	23
	Maximum	25	25	29	24	23	25	30
September	Minimum	11	15	19	14	12	19	22
	Maximum	23	23	28	22	22	25	30
October	Minimum	7	10	15	12	6	16	17
	Maximum	18	22	26	22	20	23	29
November	Minimum	1	5	9	6	0	11	14
	Maximum	14	18	23	20	16	20	26
December	Minimum	-1	-1	6	3	-2	10	12
	Maximum	11	15	19	18	12	18	23