Compare Tehran and Istanbul Weather

Tehran is 2039.5 kilometers (1267.3 miles) away and 1.5 hours ahead of Istanbul, Turkey. Both Tehran and Istanbul are in the same climate zone with Mediterranean, hot summer (Köppen climate classification: Csa).

Tehran generally has warmer weather than Istanbul. The average mean temperature in Tehran is 18.76°C (65.77°F) while Istanbul’s temperature is 16.97°C (62.55°F) and the difference is 1.79°C (35.22°F). Tehran is hottest on average in July, when the day time temperature may reach 33.5°C (92.3°F), while Istanbul is hottest in August when the average high temperature is 26.52°C (79.74°F). Tehran is coldest in January when the average low temperature is -2.46°C (27.57°F), while January is the coldest month in Istanbul, when night time temperature often falls below 5.57°C (42.03°F).

Finally, Tehran has about 1.48 times less rainfall than Istanbul, (Tehran’s 48.59mm vs Istanbul’s average of 71.68mm).

Comparison summary

Weather	Tehran	Istanbul	Difference
Hottest month	July: 33.5°C (92.3°F)	August: 26.52°C (79.74°F)	6.98°C (44.56°F)
Coldest month	January: -2.46°C (27.57°F)	January: 5.57°C (42.03°F)	8.03°C (46.45°F)
Wettest month	April: 81.42mm (3.21in)	October: 106.39mm (4.19in)	24.97mm (0.98in)
Driest month	September: 15.74mm (0.62in)	August: 21.0mm (0.83in)	5.26mm (0.21in)

Contents [show]

Temperature
Precipitation
Number of days with rainfall
Wind Speed
Average Length of Day
Humidity
Comments

Temperature

Average Temperature ( °C )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	4.46	5.9	11.28	17.45	24.92	31.28	33.5	31.91	27.5	19.83	10.91	6.22	18.76
Istanbul	7.45	8.55	10.66	14.03	19.36	24.08	26.36	26.52	23.51	18.39	14.72	9.97	16.97

City Tehran

Jan4.46
Feb5.9
Mar11.28
Apr17.45
May24.92
Jun31.28
Jul33.5
Aug31.91
Sep27.5
Oct19.83
Nov10.91
Dec6.22
Yea18.76

City Istanbul

Jan7.45
Feb8.55
Mar10.66
Apr14.03
May19.36
Jun24.08
Jul26.36
Aug26.52
Sep23.51
Oct18.39
Nov14.72
Dec9.97
Yea16.97

Average Temperature ( °F )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	40.03	42.62	52.3	63.41	76.86	88.3	92.3	89.44	81.5	67.69	51.64	43.2	65.77
Istanbul	45.41	47.39	51.19	57.25	66.85	75.34	79.45	79.74	74.32	65.1	58.5	49.95	62.55

City Tehran

Jan40.03
Feb42.62
Mar52.3
Apr63.41
May76.86
Jun88.3
Jul92.3
Aug89.44
Sep81.5
Oct67.69
Nov51.64
Dec43.2
Yea65.77

City Istanbul

Jan45.41
Feb47.39
Mar51.19
Apr57.25
May66.85
Jun75.34
Jul79.45
Aug79.74
Sep74.32
Oct65.1
Nov58.5
Dec49.95
Yea62.55

Precipitation

Precipitation (mm)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	51.19	59.55	64.68	81.42	77.92	34.85	24.36	20.74	15.74	48.35	59.56	44.67	48.59
Istanbul	100.68	88.12	80.84	67.37	74.29	62.75	30.1	21.0	58.57	106.39	68.77	101.32	71.68

City Tehran

Jan51.19
Feb59.55
Mar64.68
Apr81.42
May77.92
Jun34.85
Jul24.36
Aug20.74
Sep15.74
Oct48.35
Nov59.56
Dec44.67
Yea48.59

City Istanbul

Jan100.68
Feb88.12
Mar80.84
Apr67.37
May74.29
Jun62.75
Jul30.1
Aug21.0
Sep58.57
Oct106.39
Nov68.77
Dec101.32
Yea71.68

Precipitation (in)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	2.02	2.34	2.55	3.21	3.07	1.37	0.96	0.82	0.62	1.9	2.34	1.76	1.91
Istanbul	3.96	3.47	3.18	2.65	2.92	2.47	1.19	0.83	2.31	4.19	2.71	3.99	2.82

City Tehran

Jan2.02
Feb2.34
Mar2.55
Apr3.21
May3.07
Jun1.37
Jul0.96
Aug0.82
Sep0.62
Oct1.9
Nov2.34
Dec1.76
Yea1.91

City Istanbul

Jan3.96
Feb3.47
Mar3.18
Apr2.65
May2.92
Jun2.47
Jul1.19
Aug0.83
Sep2.31
Oct4.19
Nov2.71
Dec3.99
Yea2.82

Number of days with rainfall

Average Number of Rainy Days ( Days )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	8.18	10.0	11.45	15.91	15.91	7.36	4.36	5.27	3.55	7.91	9.18	7.09	8.85
Istanbul	14.73	13.55	11.55	10.91	11.82	8.55	4.27	2.91	8.0	11.82	9.36	12.73	10.02

City Tehran

Jan8.18
Feb10.0
Mar11.45
Apr15.91
May15.91
Jun7.36
Jul4.36
Aug5.27
Sep3.55
Oct7.91
Nov9.18
Dec7.09
Yea8.85

City Istanbul

Jan14.73
Feb13.55
Mar11.55
Apr10.91
May11.82
Jun8.55
Jul4.27
Aug2.91
Sep8.0
Oct11.82
Nov9.36
Dec12.73
Yea10.02

Wind Speed

Average Wind Speed ( km/h )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	6.55	7.1	8.52	8.37	9.02	9.43	8.95	7.54	6.85	6.38	5.22	5.23	7.43
Istanbul	19.47	19.21	17.28	15.24	14.25	15.26	17.66	20.79	18.66	17.81	17.97	18.85	17.7

City Tehran

Jan6.55
Feb7.1
Mar8.52
Apr8.37
May9.02
Jun9.43
Jul8.95
Aug7.54
Sep6.85
Oct6.38
Nov5.22
Dec5.23
Yea7.43

City Istanbul

Jan19.47
Feb19.21
Mar17.28
Apr15.24
May14.25
Jun15.26
Jul17.66
Aug20.79
Sep18.66
Oct17.81
Nov17.97
Dec18.85
Yea17.7

Average Wind Speed ( mph )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	4.07	4.41	5.29	5.2	5.6	5.86	5.56	4.69	4.26	3.96	3.24	3.25	4.62
Istanbul	12.1	11.94	10.74	9.47	8.85	9.48	10.97	12.92	11.59	11.07	11.17	11.71	11.0

City Tehran

Jan4.07
Feb4.41
Mar5.29
Apr5.2
May5.6
Jun5.86
Jul5.56
Aug4.69
Sep4.26
Oct3.96
Nov3.24
Dec3.25
Yea4.62

City Istanbul

Jan12.1
Feb11.94
Mar10.74
Apr9.47
May8.85
Jun9.48
Jul10.97
Aug12.92
Sep11.59
Oct11.07
Nov11.17
Dec11.71
Yea11.0

Average Length of Day ( Hours )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	8.33	8.33	11.31	12.76	13.97	14.47	14.13	13.4	12.41	8.76	8.21	8.32	11.2
Istanbul	7.16	8.62	9.79	10.66	13.61	14.12	14.28	11.57	11.01	9.84	7.34	6.58	10.38

City Tehran

Jan8.33
Feb8.33
Mar11.31
Apr12.76
May13.97
Jun14.47
Jul14.13
Aug13.4
Sep12.41
Oct8.76
Nov8.21
Dec8.32
Yea11.2

City Istanbul

Jan7.16
Feb8.62
Mar9.79
Apr10.66
May13.61
Jun14.12
Jul14.28
Aug11.57
Sep11.01
Oct9.84
Nov7.34
Dec6.58
Yea10.38

Humidity (%)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
Tehran	49.85	51.76	44.43	38.12	29.37	20.38	19.5	21.23	21.97	32.6	45.68	48.62	35.29
Istanbul	76.23	77.04	72.84	69.7	70.14	67.4	66.95	68.14	67.36	71.63	71.7	73.42	71.05

City Tehran

Jan49.85
Feb51.76
Mar44.43
Apr38.12
May29.37
Jun20.38
Jul19.5
Aug21.23
Sep21.97
Oct32.6
Nov45.68
Dec48.62
Yea35.29

City Istanbul

Jan76.23
Feb77.04
Mar72.84
Apr69.7
May70.14
Jun67.4
Jul66.95
Aug68.14
Sep67.36
Oct71.63
Nov71.7
Dec73.42
Yea71.05

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