Qom, Iran climate

Csa Hot-summer Mediterranean

Qom has a strongly seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is July with an average daily high near 36°C, while the coldest is January averaging around −6°C at night. Precipitation totals about 315 mm a year and is strongly seasonal — April alone averages 74 mm while August barely receives 1 mm.

☀️ Summers

Very hot

Highs near 36°C in July.

About 62 days a year above 32 °C

❄️ Winters

Cold

Lows near −6°C in January.

About 47 freezing nights a year

🌧️ Rain

Fairly dry

About 315 mm of rain a year.

Wettest in April

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

−0.8 °C vs 50 years ago

Temperature & precipitation

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

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Qom climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	5	10	15	20	26	33	36	35	31	24	14	8
Avg temp (°C)	−1	4	9	13	19	25	28	27	22	16	8	3
Avg low (°C)	−6	−3	2	5	11	16	20	18	14	8	2	−3
Precipitation (mm)	35	28	50	74	38	9	1	1	3	12	25	37

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	5	10	15	20	26	33
Avg temp (°C)	−1	4	9	13	19	25
Avg low (°C)	−6	−3	2	5	11	16
Precipitation (mm)	35	28	50	74	38	9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	36	35	31	24	14	8
Avg temp (°C)	28	27	22	16	8	3
Avg low (°C)	20	18	14	8	2	−3
Precipitation (mm)	1	1	3	12	25	37

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	5	5	6	7	5	1	0.9	0.4	0.4	3	5	5
Days with high ≥ 32°C (days)	—	—	—	—	1	14	19	20	8	—	—	—
Days with low ≤ 0°C (days)	13	11	5	0.4	0.0	—	—	—	—	0.1	5	12

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	5	5	6	7	5	1
Days with high ≥ 32°C (days)	—	—	—	—	1	14
Days with low ≤ 0°C (days)	13	11	5	0.4	0.0	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.9	0.4	0.4	3	5	5
Days with high ≥ 32°C (days)	19	20	8	—	—	—
Days with low ≤ 0°C (days)	—	—	—	0.1	5	12

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	55	55	55	57	47	26	27	24	23	37	47	50
Clear days (≤ 30% cloud)	7	5	7	6	10	20	19	22	22	15	11	9
Partly cloudy days (30–70%)	14	14	13	13	14	9	10	8	8	12	11	13
Cloudy days (≥ 70%)	10	9	11	11	7	1	1	1	0.7	4	8	9
Relative humidity (%)	68	64	58	54	43	26	22	21	24	38	57	65
Wind speed (m/s)	2.9	3.2	3.3	3.0	2.7	2.6	2.9	2.8	2.4	2.4	2.4	2.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	55	55	55	57	47	26
Clear days (≤ 30% cloud)	7	5	7	6	10	20
Partly cloudy days (30–70%)	14	14	13	13	14	9
Cloudy days (≥ 70%)	10	9	11	11	7	1
Relative humidity (%)	68	64	58	54	43	26
Wind speed (m/s)	2.9	3.2	3.3	3.0	2.7	2.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	27	24	23	37	47	50
Clear days (≤ 30% cloud)	19	22	22	15	11	9
Partly cloudy days (30–70%)	10	8	8	12	11	13
Cloudy days (≥ 70%)	1	1	0.7	4	8	9
Relative humidity (%)	22	21	24	38	57	65
Wind speed (m/s)	2.9	2.8	2.4	2.4	2.4	2.6

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 18 years of daily observations at Arak, a weather station, about 110 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 →