Peak in August
Coolest in January
Heavy in December
Peak in dry season
Sea Temperature
Sea of Marmara(Marmara Denizi)
Annual Average
Consider a wetsuit for extended swimming
Based on average sea surface temperature
Marmara Denizi
Istanbul coastline
Istanbul Monthly Weather Guide
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January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for Istanbul
Currency
TRY
₺ Turkish lira
Language
Turkish
Driving
Right side
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Safety
Travel Precautions
GPI: 2.785
Best Time to Visit Istanbul
Location, climate overview & historical trends
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📍 41.0082° N, 28.9784° E
Open in Google MapsIstanbul is a prominent destination in Turkey.
Located at 41.01°N latitude,Istanbul experiences a temperate climate with four distinct seasons.
Based on 30 years of data, August is the warmest month (avg. 29°C), while January is the coolest. December sees the most rain (29% chance), making July the driest month.
Historical Climate Trend
30-Year Analysis+3.05°C
Total over 30 years
+1.05°C
Per decade
Linear regression analysis of historical maximum temperatures for Istanbul, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)April, May, June
Best months to visit
19°C
Avg High
Based on 30 years of NASA satellite data,Istanbul receives approximately 405mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
17°
2024 Avg
19.7°
2040 Proj
20.2°
+1.05°C
per decade (observed)
+0.33°C
per decade (CMIP6)
🌡️ Istanbul has warmed by +3.0°C since 1995. By 2040, an additional +0.5°C is projected (based on CMIP6 rate of 0.327°C/decade), for a total of +3.6°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
Exclusive flight analytics & health data for Istanbul
Smart Flight Estimator
Airport-to-Airport Logistics
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Flight Connectivity Analysis
Airport traffic data & seasonal patterns
Extremely busy airport
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Peak
Jun
Low
Jan
Monthly Traffic Distribution
Key Connections
Health & Safety Advisory
CDC travel health recommendations
COVID-19
All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.
Hepatitis A
Recommended for unvaccinated travelers one year old or older going to Türkiye (Turkey).Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.
Hepatitis B
Recommended for unvaccinated travelers younger than 60 years old traveling to Türkiye (Turkey). Unvaccinated travelers 60 years and older may get vaccinated before traveling to Türkiye (Turkey).
Measles
Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.
Rabies
Dogs infected with rabies are commonly found in Türkiye (Turkey).Rabies is also present in some terrestrial wildlife species.If rabies exposures occur while in Türkiye (Turkey), rabies vaccines may only be available in larger suburban/urban medical facilities.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.
Typhoid
Recommended for most travelers, especially those staying with friends or relatives or visiting smaller cities or rural areas.
+1 more
Source: CDC Travelers' Health
View Complete Health GuideIstanbul Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 9°C | 28% | Neutral |
| February | 10°C | 29% | Neutral |
| March | 12°C | 25% | Neutral |
| April | 16°C | 19% | 😊 Pleasant |
| May | 21°C | 17% | ✨ Perfect |
| June | 26°C | 13% | ✨ Perfect |
| July | 29°C | 6% | 😊 Pleasant |
| August | 29°C | 7% | 😊 Pleasant |
| September | 25°C | 15% | ✨ Perfect |
| October | 20°C | 18% | ✨ Perfect |
| November | 15°C | 22% | 😊 Pleasant |
| December | 11°C | 29% | Neutral |
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Compare weather conditions with nearby destinations for your trip planning
Compare Istanbul Weather vs Popular Destinations
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These destinations share similar weather patterns with Istanbul. Perfect alternatives if you're looking for the same climate in a different location.
Istanbul Weather FAQ
When is the best time to visit Istanbul?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, April, May, June are usually great choices.
When is the hottest month in Istanbul?
August is historically the hottest month in Istanbul with average highs of 29°C.
When does it rain the most in Istanbul?
December typically sees the highest probability of rain (29%).
Is Istanbul expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.