Compare Istanbul and Tehran Weather

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

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

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

Comparison summary

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

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

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

Average Temperature ( °F )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

Precipitation

Precipitation (mm)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

Precipitation (in)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

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
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
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

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

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

Wind Speed

Average Wind Speed ( km/h )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

Average Wind Speed ( mph )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

Average Length of Day ( Hours )

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

Humidity (%)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Ann
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
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

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

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

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