The best time to visit Istanbul is April to June and September to October: 16 to 26 °C (61 to 79 °F) in the afternoon, little rain and long days for walking between the two shores. Summer is hot and humid, winter cool, gray and rainy, with occasional snow.
Istanbul has a transitional climate between the Mediterranean and the Black Sea. Summers are hot (28 °C (82 °F) in the afternoon in July-August) and fairly dry, winters cool (9 °C (48 °F) in January) with many rainy days. The north wind from the Black Sea can make temperatures drop in winter and bring snow episodes that disrupt traffic. For a city visit, you also need to allow for summer crowds, religious holidays whose dates change every year, and hotel prices. Here is how to choose, based on the official normals of the Turkish State Meteorological Service.
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⚠️ Safety: what the UK FCDO and the U.S. State Department say (read October 2026)
- UK FCDO (GOV.UK, updated 19 October 2026): advises against all travel to within 10 km (6 mi) of the border with Syria; terrorists are likely to try to carry out attacks in Turkey, so stay aware of your surroundings.
- U.S. Department of State (travel.state.gov, last updated June 11, 2026): strongly recommends that U.S. citizens reconsider travel to specific areas in eastern and southeastern Turkey, far from Istanbul, and not travel to areas near the Syrian or Iraqi borders.
- Check both sources for the latest advice before you leave.
When to go to Istanbul at a glance
- Best times April to June and September-October
- For tulips April, in the city’s parks (Emirgan, Gülhane)
- Hottest months July and August, around 28 °C (82 °F) average high
- Driest month July (36 mm (1.4 in), fewer than 5 rainy days)
- Wettest month December (125 mm (4.9 in), about 17 rainy days)
- Cheapest period November to March, outside the year-end holidays
- To check the dates of Ramadan and religious holidays, which move about 11 days earlier each year
When to go to Istanbul by priority
- Best weather: May, and more broadly April to June and September-October (16 to 26 °C (61 to 79 °F) in the afternoon)
- Cheapest: November to March, outside the year-end holidays
- Fewest crowds: January to March and November, with cool and often rainy weather
- Events: tulip festival in April, Republic Day on October 29; Ramadan and religious holidays on variable dates
Once you have chosen your dates, our guide to visiting Istanbul helps you organize your days. To compare with other spring destinations: where to go in May.
Istanbul: the calendar at a glance
✅ Best months: April, may, June, September, October
❌ Period to avoid: January, December
Istanbul weather month by month
The table uses the normals of the Kireçburnu station, on the European shore of the Bosphorus, published by the Turkish State Meteorological Service (MGM). Central districts, further south, can be slightly milder.
| Month | Avg. max | Avg. min | Rain | Crowds | Prices | Verdict |
|---|---|---|---|---|---|---|
| January | 8.8 °C (48 °F) | 3.6 °C (38 °F) | 96 mm (3.8 in) | Low | Low | ❌ Cold, gray and rainy |
| February | 9.4 °C (49 °F) | 3.5 °C (38 °F) | 88 mm (3.5 in) | Low | Low | ⚠️ Cold, snow possible |
| March | 12.0 °C (54 °F) | 4.9 °C (41 °F) | 70 mm (2.8 in) | Moderate | Moderate | ⚠️ Cool, changeable weather |
| April | 16.1 °C (61 °F) | 8.1 °C (47 °F) | 45 mm (1.8 in) | High (tulips) | Moderate → high | ✅ Mild, tulip festival |
| May | 21.0 °C (70 °F) | 12.8 °C (55 °F) | 37 mm (1.5 in) | High | High | ✅ One of the best months |
| June | 25.7 °C (78 °F) | 17.4 °C (63 °F) | 45 mm (1.8 in) | High | High | ✅ Warm and sunny |
| July | 28.0 °C (82 °F) | 20.3 °C (69 °F) | 36 mm (1.4 in) | Very high | Very high | ⚠️ Hot, humid and busy |
| August | 28.2 °C (83 °F) | 21.2 °C (70 °F) | 44 mm (1.7 in) | Very high | Very high | ⚠️ The hottest, long lines |
| September | 24.6 °C (76 °F) | 17.4 °C (63 °F) | 81 mm (3.2 in) | High | High | ✅ Summer without August’s heat |
| October | 19.9 °C (68 °F) | 13.6 °C (56 °F) | 98 mm (3.9 in) | Moderate | Moderate | ✅ Mild, showers return |
| November | 15.0 °C (59 °F) | 9.2 °C (49 °F) | 101 mm (4.0 in) | Low | Low | ⚠️ Cool and rainy |
| December | 10.7 °C (51 °F) | 5.5 °C (42 °F) | 125 mm (4.9 in) | Moderate (holidays) | Moderate | ❌ The wettest month |
According to the data published by the MGM for the same station (1981-2010 period for these values), Istanbul has about 17 rainy days in December and January, compared with fewer than 5 in July. Sunshine goes from about 62 hours in December to nearly 320 hours in July.
Seasons in Istanbul: pros and cons
Spring (March to May): tulips and mild weather
March stays cool (12 °C (54 °F)) and changeable. April turns mild (16 °C (61 °F)) and the parks fill with tulips, the symbol of the city: the municipality organizes a festival every year in April. May is one of the best months: 21 °C (70 °F) in the afternoon and less than 40 mm (1.6 in) of rain.
- Pros: ideal temperatures for walking, pleasant Bosphorus cruises, gardens in bloom
- Cons: cool nights in March-April, crowds rising from April
- Our tip: May, for the weather and long days
Summer (June to August): heat and crowds
June is warm and bright (26 °C (79 °F)). July and August reach 28 °C (82 °F) on average with marked humidity; heat waves can go well beyond these values. This is the high season: lines at Topkapı Palace and the Basilica Cistern, hotels at their most expensive. Evenings on the Bosphorus and the Princes’ Islands are then very pleasant.
- Pros: sunshine, long evenings, lively terraces and ferries, swimming possible on the Black Sea and island beaches
- Cons: humid heat, crowds, high prices
- Our tip: June, before the July-August peak
Autumn (September to November): the late season
September extends the summer (25 °C (77 °F)) with slightly fewer people. October stays mild (20 °C (68 °F)) but the rains return (98 mm (3.9 in)). November is cool and often gray.
- Pros: pleasant temperatures until October, falling prices
- Cons: more frequent showers from October, shortening days
- Our tip: the second half of September and early October
Winter (December to February): Istanbul without the crowds
It is 9 to 11 °C (48 to 52 °F) in the afternoon and 3 to 5 °C (37 to 41 °F) at night, with many rainy days. Snow episodes occur almost every winter and can disrupt transport. In return, the sites are quiet and hotels are cheaper.
- Pros: low prices, short waits at monuments, atmosphere of hammams and cafés
- Cons: damp cold, gray skies, short days
- Who is it for? A cultural city break or a small budget, with good rain gear
When to go to Istanbul by trip type
| Trip | Best time | Where? |
|---|---|---|
| City break and monuments | April to June, September-October | Sultanahmet, Beyoğlu, Fatih |
| Bosphorus cruise | May to September | Eminönü and Beşiktaş piers |
| Tulips and gardens | April | Emirgan, Gülhane |
| Princes’ Islands and beaches | June to September | Büyükada, Black Sea coast |
| Budget | November to March, outside holidays | Everywhere |
| Combining with Cappadocia | April-June, September-October | Cappadocia, by domestic flight |
Major events in Istanbul
| Date | Event | Location |
|---|---|---|
| April | Tulip festival organized by the municipality | City parks, including Emirgan |
| Variable dates | Ramadan and the festival marking its end (Ramazan Bayramı), then the Feast of the Sacrifice (Kurban Bayramı): many Turkish travelers and sometimes modified opening hours | Throughout the city |
| October 29 | Republic Day (public holiday) | Throughout the city |
| December 31 | New Year’s Eve, very busy | Taksim, Bosphorus shores |
Istanbul month by month
Istanbul in January: Cold (9 °C (48 °F)) and rainy, about 17 rainy days. Quiet monuments, low prices.
Istanbul in February: The coldest month at night (3.5 °C (38 °F)). Snow possible.
Istanbul in March: Cool (12 °C (54 °F)) and changeable. Prices stay low.
Istanbul in April: Mild (16 °C (61 °F)). Tulips in the parks: one of the most beautiful times.
Istanbul in May: One of the best months: 21 °C (70 °F), little rain.
Istanbul in June: Warm (26 °C (79 °F)) and sunny, before the peak of visitor numbers.
Istanbul in July: 28 °C (82 °F), humid and very busy. Sightsee early in the morning.
Istanbul in August: The hottest (28.2 °C (83 °F)) and the most expensive.
Istanbul in September: Summer lingers (25 °C (77 °F)) with slightly fewer people.
Istanbul in October: Mild (20 °C (68 °F)), rain rising. Republic Day on the 29th.
Istanbul in November: Cool and rainy. Quiet and inexpensive.
Istanbul in December: The wettest (125 mm (4.9 in)). Crowds around New Year.
When to book your stay in Istanbul
For April-May, summer and New Year, book your accommodation 2 to 3 months ahead, especially in Sultanahmet and Beyoğlu. In the low season, a few weeks are often enough. Istanbul has two international airports: Istanbul Airport on the European side and Sabiha Gökçen on the Asian side. For mobile data as soon as you land, see our Turkey eSIM guide.
Planning your stay in Istanbul
- Entry requirements: visa and passport rules depend on your nationality and change regularly. See our entry requirements for Turkey and check them before you travel.
- Time difference: see our time difference guide for Turkey.
- Currency: the Turkish lira. Prices change quickly with inflation: check the amount before any payment.
- Health and insurance: for medical entry requirements and recommended vaccinations, the UK FCDO (GOV.UK, updated 19 October 2026) points to TravelHealthPro’s Turkey guide, and advises getting travel insurance that covers your itinerary, planned activities and expenses in an emergency.
To organize your visits, see our Istanbul guide. For the rest of the country, see when to go to Turkey and our Turkey travel guide.
Frequently asked questions
What is the best month to visit Istanbul?
May, followed by June, September and April: 16 to 26 °C (61 to 79 °F) in the afternoon and little rain according to the Turkish State Meteorological Service’s normals. October stays mild, with more showers.
Is Istanbul too hot in summer?
July and August have an average high of about 28 °C (82 °F), with marked humidity, and heat waves can go well beyond that. Visit the sites early and enjoy the Bosphorus ferries at the end of the day.
What is the wettest month in Istanbul?
December, with 125 mm (4.9 in) according to the 1991-2020 normals for the Kireçburnu station. November, October and January are also rainy.
Does it snow in Istanbul?
Yes, almost every winter, mostly from January to March. Snowfalls remain irregular but can seriously disrupt traffic.
Can you visit Istanbul during Ramadan?
Yes. Sites stay open and tourist restaurants serve during the day. The atmosphere is special in the evening, when the fast is broken. Be discreet when eating in public and check opening hours, which can change during the holidays.
Is Istanbul safe to visit?
The UK FCDO (GOV.UK, updated 19 October 2026) advises against all travel to within 10 km (6 mi) of the Syrian border and says terrorists are likely to try to carry out attacks in Turkey; the U.S. State Department (travel.state.gov, last updated June 11, 2026) advises reconsidering travel to specific areas in the east and southeast, far from Istanbul. Check both sources before you go.
Our sources
- Turkish State Meteorological Service (MGM): 1991-2020 normals for the Kireçburnu station (Sarıyer, on the Bosphorus)
- Safety and health information read on 26 October 2026: UK FCDO, foreign travel advice for Turkey (GOV.UK, updated 19 October 2026), and U.S. Department of State, Turkey country information (travel.state.gov, last updated June 11, 2026)
- Republic Day (public holiday, October 29): Wikipedia, « Republic Day (Turkey) », read 11 November 2026
- Our methodology
Updated November 2026.
