Ölgii, Mongolia climate

BWk Cold desert

Ölgii has a strongly seasonal subarctic climate (Cold desert, Köppen BWk). The hottest month is July with an average daily high near 24°C, while the coldest is January averaging around −23°C at night. Precipitation totals about 89 mm a year and is strongly seasonal — July alone averages 27 mm while January barely receives 1 mm.

☀️ Summers

Mild

Highs near 24°C in July.

❄️ Winters

Bitterly cold

Lows near −23°C in January.

🌧️ Rain

Very dry

About 89 mm of rain a year.

Wettest in July

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

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)

Ölgii climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	−11	−6	2	10	16	22	24	22	16	8	−2	−9
Avg temp (°C)	−17	−13	−5	3	9	16	18	15	9	1	−8	−14
Avg low (°C)	−23	−20	−13	−4	3	9	12	9	2	−5	−13	−20
Precipitation (mm)	1	1	2	4	10	17	27	17	7	2	2	1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	−11	−6	2	10	16	22
Avg temp (°C)	−17	−13	−5	3	9	16
Avg low (°C)	−23	−20	−13	−4	3	9
Precipitation (mm)	1	1	2	4	10	17

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	24	22	16	8	−2	−9
Avg temp (°C)	18	15	9	1	−8	−14
Avg low (°C)	12	9	2	−5	−13	−20
Precipitation (mm)	27	17	7	2	2	1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	53	56	64	71	67	67	68	63	60	62	60	57
Relative humidity (%)	82	74	59	46	43	44	49	49	49	52	66	76
Wind speed (mph)	6.7	6.7	7.2	7.8	7.2	5.6	4.7	4.7	5.5	6.4	7.7	7.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	53	56	64	71	67	67
Relative humidity (%)	82	74	59	46	43	44
Wind speed (mph)	6.7	6.7	7.2	7.8	7.2	5.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	68	63	60	62	60	57
Relative humidity (%)	49	49	49	52	66	76
Wind speed (mph)	4.7	4.7	5.5	6.4	7.7	7.3

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Ulgi, a weather station, about 4 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 →