Choyr, Mongolia climate

BWk Cold desert

Choyr has a strongly seasonal subarctic climate (Cold desert, Köppen BWk). The hottest month is July with an average daily high near 27°C, while the coldest is January averaging around −25°C at night. Precipitation totals about 114 mm a year and is strongly seasonal — August alone averages 27 mm while January barely receives 1 mm.

☀️ Summers

Warm

Highs near 27°C in July.

❄️ Winters

Bitterly cold

Lows near −25°C in January.

🌧️ Rain

Very dry

About 114 mm of rain a year.

Wettest in August

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Choyr climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	−14	−8	2	11	19	25	27	25	19	9	−3	−13
Avg temp (°C)	−20	−15	−6	4	11	18	21	18	12	2	−9	−18
Avg low (°C)	−25	−21	−13	−4	3	10	14	12	4	−5	−15	−23
Precipitation (mm)	1	2	2	3	10	24	27	27	11	4	2	2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	−14	−8	2	11	19	25
Avg temp (°C)	−20	−15	−6	4	11	18
Avg low (°C)	−25	−21	−13	−4	3	10
Precipitation (mm)	1	2	2	3	10	24

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	27	25	19	9	−3	−13
Avg temp (°C)	21	18	12	2	−9	−18
Avg low (°C)	14	12	4	−5	−15	−23
Precipitation (mm)	27	27	11	4	2	2

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	42	46	49	54	57	63	62	55	48	45	47	47
Relative humidity (%)	81	71	52	40	37	41	47	50	50	54	66	80
Wind speed (m/s)	3.1	3.2	3.6	4.1	4.1	3.3	2.7	2.6	2.8	2.9	3.2	3.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	42	46	49	54	57	63
Relative humidity (%)	81	71	52	40	37	41
Wind speed (m/s)	3.1	3.2	3.6	4.1	4.1	3.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	62	55	48	45	47	47
Relative humidity (%)	47	50	50	54	66	80
Wind speed (m/s)	2.7	2.6	2.8	2.9	3.2	3.2

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Choir, a weather station, about 15 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →