Climate guide for Istanbul, Turkey

Best Time to Visit
Istanbul

How to read the score (0–10)
05810
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About Istanbul

From April to June, Istanbul reveals its best self: explore Hagia Sophia, wander the Grand Bazaar, and cross to the Asian side free from summer's heavy humidity. Glide the strait at golden hour, then drift between rooftop meze as the soft evenings linger.

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Travel Tips

Timing & weather
Check Istanbul's monthly climate scores before locking flights - temperate patterns shift comfort for sightseeing trips across the year.
Getting around
In Istanbul, pair a walkable core day with one transit or transfer buffer - crowds and traffic vary by season in Turkey.
Tickets & access
Reserve popular museums and day trips from Istanbul ahead in peak months; shoulder seasons are more flexible.
Pack for the profile
Comfortable walking shoes and a day bag matter more than formal wear for most Istanbul sightseeing days.

Things to do in Istanbul

Istanbul, Turkey. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Istanbul: the short answer

The best time to visit Istanbul is June, followed by September, May. Those months combine the most usable temperatures with the fewest lost days to rain: June averages 22°C with 42 mm of rain and about 30 sunny days. The months to avoid unless you have a specific reason are January, December. If budget matters more than perfect weather, February is the strongest of the low-rate months at 6.5/10.

Across the year Istanbul swings from 7°C in February to 25°C in July, a 19-degree spread, while rainfall ranges from 20 mm in August to 100 mm in November. That is the whole planning problem in one sentence: Istanbul is not equally good year-round, and the difference between the best and worst month here is 3.2 points on a 10-point scale.

Warmest month: July (25°C). Coolest: February (7°C). Driest: August (20 mm). Wettest: November (100 mm).

Istanbul month by month

January in Istanbul — workable with trade-offs

Trade-offs · 6.2/10

January averages 8°C (46°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

Rainfall runs 91 mm, so plan one flexible day in three; you still get about 19 sunny days and 9.6 hours of daylight.

It scores 6.2/10 here, 12th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.

If your dates are flexible, June is materially better in Istanbul — 3.2 points higher on the same scale.

February in Istanbul — workable with trade-offs

Trade-offs · 6.5/10

February averages 7°C (44°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

Rainfall runs 76 mm, so plan one flexible day in three; you still get about 19 sunny days and 10.7 hours of daylight.

It scores 6.5/10 here, 10th of 12 months, against 9.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.

If your dates are flexible, June is materially better in Istanbul — 2.9 points higher on the same scale.

March in Istanbul — reliably good (9th best month)

Good · 7.2/10

March averages 8°C (47°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

Rainfall runs 76 mm, so plan one flexible day in three; you still get about 21 sunny days and 12 hours of daylight.

It scores 7.2/10 here, 9th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.

If your dates are flexible, June is materially better in Istanbul — 2.2 points higher on the same scale.

April in Istanbul — reliably good (7th best month)

Good · 8.2/10

April averages 12°C (54°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

Rainfall runs 70 mm, so plan one flexible day in three; you still get about 24 sunny days and 13.3 hours of daylight.

It scores 8.2/10 here, 7th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.

May in Istanbul — the year's strongest window

Best window · 9.1/10

May averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

Rainfall runs 57 mm, so plan one flexible day in three; you still get about 27 sunny days and 14.5 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Istanbul at 9.1/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.

June in Istanbul — the year's strongest window

Best window · 9.4/10

June averages 22°C (72°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 42 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 15.1 daylight hours.

On our climate-comfort scale this is the top-ranked month of the year for Istanbul at 9.4/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection.

July in Istanbul — reliably good (5th best month)

Good · 8.4/10

July averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 33 mm of rain — occasional showers rather than washed-out days — alongside about 31 sunny days and 14.8 daylight hours.

It scores 8.4/10 here, 5th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and this is one of the busiest months here.

Pack light clothing, swimwear and real sun protection.

August in Istanbul — reliably good (6th best month)

Good · 8.4/10

August averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 31 sunny days and 13.8 daylight hours.

It scores 8.4/10 here, 6th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and this is one of the busiest months here.

Pack light clothing, swimwear and real sun protection.

September in Istanbul — the year's strongest window

Best window · 9.3/10

September averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 49 mm, so plan one flexible day in three; you still get about 29 sunny days and 12.5 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Istanbul at 9.3/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, a packable rain layer.

October in Istanbul — the year's strongest window

Best window · 8.8/10

October averages 16°C (61°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

Rainfall runs 53 mm, so plan one flexible day in three; you still get about 26 sunny days and 11.1 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Istanbul at 8.8/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.

November in Istanbul — reliably good (8th best month)

Good · 7.4/10

November averages 13°C (56°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.

Rainfall runs 100 mm, so plan one flexible day in three; you still get about 22 sunny days and 9.9 hours of daylight.

It scores 7.4/10 here, 8th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.

If your dates are flexible, June is materially better in Istanbul — 2 points higher on the same scale.

December in Istanbul — workable with trade-offs

Trade-offs · 6.3/10

December averages 10°C (49°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

Rainfall runs 90 mm, so plan one flexible day in three; you still get about 17 sunny days and 9.3 hours of daylight.

It scores 6.3/10 here, 11th of 12 months, against 9.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.

If your dates are flexible, June is materially better in Istanbul — 3.1 points higher on the same scale.

Frequently asked

When is the best time to visit Istanbul, Turkey?
In Ideal Weather mode, the best months to visit Istanbul are June, September, May, October, July, August. June is the single peak month with an Ideal Weather score of 9.4/10 based on temperature, rainfall, humidity, daylight and historical sunny days.
What is the weather like in Istanbul year-round?
Istanbul has a climate profile suited to sightseeing and cultural travel. Average monthly temperatures range from 7°C in February to 25°C in July, with Ideal Weather scores between 6.2 and 9.4 out of 10.
Which months should I avoid in Istanbul?
The lowest Ideal Weather-scoring months in Istanbul are January (6.2/10), December (6.3/10), February (6.5/10). These months typically combine less comfortable temperatures, higher rainfall or fewer sunny days.
When is the rainy season in Istanbul?
November is the wettest month in Istanbul, averaging about 100 mm of rainfall. August is the driest, at roughly 20 mm.
Which is the sunniest month in Istanbul?
July sees the most sun in Istanbul, with about 31 sunny days on average - ideal for outdoor plans.
Is Istanbul a good destination for sightseeing and cultural travel?
Istanbul is well suited to sightseeing and cultural travel. Its highest Ideal Weather window (June, September, May, October, July, August) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Istanbul calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Istanbul: temperature comfort, precipitation, humidity, daylight hours, and historical sunny days - weighted for sightseeing and cultural travel.

Explore by month

Curated in Istanbul

Tickets & experiences

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