Climate guide for Istanbul, Turkey

Best Time to Visit
Istanbul

How to read the score (0–10)
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01 · Turkey

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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Did you know?

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Travel Tips

01Best time & timing
June leads the year at 9.4/10, with September and May close behind — January (6.2/10) is the one to avoid without a specific reason.
02Weather & what to pack
In June plan for about 22°C; the month brings 42 mm of rain. Pack light clothing, a hat and real sun protection.
03Crowds & value
Crowds build in July and rates follow; May usually pairs good conditions (9.1/10) with the lowest prices of the strong months.

Things to do in Istanbul

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

When to visit Istanbul: the short answer

Plan Istanbul for June, with September, May close behind — the stretch with the most usable temperatures and the fewest lost days to rain: June averages 22°C with 42 mm of rain and about 30 days with 6+ hours of sunshine. The months to avoid unless you have a specific reason are January, December. If budget matters more than perfect weather, March is the strongest of the low-rate months at 7.2/10.

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. In short, Istanbul is not equally good year-round — the gap between its best and worst month is 3.2 points on the same 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

Expect 8°C (46°F) in January. A good month for city streets, viewpoints and long meals; leave swimming for another season.

Budget for roughly 91 mm of rain this month — a flexible day or two helps — with about 19 days with 6+ hours of sunshine and 9.6 hours of daylight to work around it.

That is 6.2/10 on the same scale — 12th of 12 months, versus 9.4/10 for the best month here.

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 — 3.2 points higher on the same scale.

February in Istanbul — workable with trade-offs

Trade-offs · 6.5/10

Expect 7°C (44°F) in February. A good month for city streets, viewpoints and long meals; leave swimming for another season.

Budget for roughly 76 mm of rain this month — a flexible day or two helps — with about 19 days with 6+ hours of sunshine and 10.7 hours of daylight to work around it.

That is 6.5/10 on the same scale — 10th of 12 months, versus 9.4/10 for the best month here.

Budget for 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: strong conditions, 9th of 12

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 days with 6+ hours of sunshine 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.

Figure on low-season pricing, with 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.

Flexible dates? June scores 2.2 points higher here — enough to change the trip.

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

Good · 8.2/10

Temperatures hover around 12°C (54°F) — the kind of month where neither heat nor cold forces the schedule.

Budget for roughly 70 mm of rain this month — a flexible day or two helps — with about 24 days with 6+ hours of sunshine and 13.3 hours of daylight to work around it.

That is 8.2/10 on the same scale — 7th of 12 months, versus 9.4/10 for the best month here.

Budget for 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 is one of the strongest months in Istanbul (3rd)

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 days with 6+ hours of sunshine and 14.5 hours of daylight.

A 9.1/10 puts this among the year's best months in Istanbul (3rd of 12); only June scores higher, at 9.4/10.

Plan for mid-season pricing, with crowds are moderate.

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

June in Istanbul tops the year's climate scores

Best window · 9.4/10

At 22°C (72°F) this is comfortable city weather in June, with sightseeing easiest before lunch and after the afternoon peak.

With around 42 mm of rain, any showers tend to pass through rather than settle in; about 30 days with 6+ hours of sunshine and 15.1 hours of daylight fill the rest.

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 peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack light clothing, a hat and real sun protection.

July holds up well in Istanbul — 5th best month

Good · 8.4/10

At 25°C (78°F) this is comfortable city weather in July, with sightseeing easiest before lunch and after the afternoon peak.

With around 33 mm of rain, any showers tend to pass through rather than settle in; about 31 days with 6+ hours of sunshine and 14.8 hours of daylight fill the rest.

That is 8.4/10 on the same scale — 5th of 12 months, versus 9.4/10 for the best month here.

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

Pack light clothing, a hat and real sun protection.

August in Istanbul: strong conditions, 6th of 12

Good · 8.4/10

August averages 25°C (78°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.

Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine 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.

Figure on mid-season pricing, with this is one of the busiest months here.

Pack light clothing, a hat and real sun protection.

September is one of the strongest months in Istanbul (2nd)

Best window · 9.3/10

September averages 21°C (70°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.

Rainfall runs 49 mm, so plan one flexible day in three; you still get about 29 days with 6+ hours of sunshine and 12.5 hours of daylight.

A 9.3/10 puts this among the year's best months in Istanbul (2nd of 12); only June scores higher, at 9.4/10.

Figure on peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

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

October in Istanbul — one of the year's strongest windows (4th)

Best window · 8.8/10

Temperatures hover around 16°C (61°F) — the kind of month where neither heat nor cold forces the schedule.

Budget for roughly 53 mm of rain this month — a flexible day or two helps — with about 26 days with 6+ hours of sunshine and 11.1 hours of daylight to work around it.

On our climate-comfort scale this is one of the strongest months of the year for Istanbul at 8.8/10 (4th of 12), just behind June at 9.4/10.

Budget for 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 holds up well in Istanbul — 8th best month

Good · 7.4/10

Temperatures hover around 13°C (56°F) — the kind of month where neither heat nor cold forces the schedule.

Budget for roughly 100 mm of rain this month — a flexible day or two helps — with about 22 days with 6+ hours of sunshine and 9.9 hours of daylight to work around it.

That is 7.4/10 on the same scale — 8th of 12 months, versus 9.4/10 for the best month here.

Budget for 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 days with 6+ hours of sunshine 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.

Plan for low-season pricing, with 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.

Flexible dates? June scores 3.1 points higher here — enough to change the trip.

FAQ

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 days with 6+ hours of sunshine.
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 days with 6+ hours of sunshine.
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 days with 6+ hours of sunshine 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 days with 6+ hours of sunshine - weighted for sightseeing and cultural travel.

Climate data: Open-Meteo ERA5 historical archive, the five most recent complete years (2021–2025). Scores are monthly averages for that window, not forecasts, and short-window precipitation can differ from longer-term normals. “Sunny days” count days with at least 6 hours of measured sunshine — they are not dry days.

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Explore by month

Curated in Istanbul

Tickets & experiences