Istanbul, Turkey 14-Day Forecast
Turkey 🇹🇷
69°
Overcast right now
Today: high 70°, low 66°
Updated 1 hour ago
Istanbul weather for the next 14 days
Thursday, September 17
Sunny High 74° Low 64°Precipitation
57%
· 0.05 in
Max wind
14 mph
Humidity
65%
UV index
4 - Moderate
Sunrise / sunset
06:46 AM / 07:10 PM
Friday, September 18
Sunny High 77° Low 66°Precipitation
4%
· 0.0 in
Max wind
12 mph
Humidity
59%
UV index
6 - Moderate
Sunrise / sunset
06:47 AM / 07:08 PM
Saturday, September 19
Sunny High 78° Low 66°Precipitation
4%
· 0.0 in
Max wind
13 mph
Humidity
60%
UV index
6 - Moderate
Sunrise / sunset
06:48 AM / 07:07 PM
Sunday, September 20
Overcast High 77° Low 67°Precipitation
14%
· 0.0 in
Max wind
13 mph
Humidity
67%
UV index
6 - High
Sunrise / sunset
06:49 AM / 07:05 PM
Monday, September 21
Sunny High 78° Low 68°Precipitation
8%
· 0.0 in
Max wind
9 mph
Humidity
67%
UV index
7 - High
Sunrise / sunset
06:50 AM / 07:03 PM
Tuesday, September 22
Patchy rain nearby High 71° Low 63°Precipitation
27%
· 0.01 in
Max wind
15 mph
Humidity
60%
UV index
5 - Moderate
Sunrise / sunset
06:51 AM / 07:01 PM
Wednesday, September 23
Patchy rain nearby High 65° Low 59°Precipitation
36%
· 0.02 in
Max wind
14 mph
Humidity
55%
UV index
5 - Moderate
Sunrise / sunset
06:52 AM / 07:00 PM
Thursday, September 24
Sunny High 69° Low 61°Precipitation
1%
· 0.0 in
Max wind
8 mph
Humidity
46%
UV index
6 - High
Sunrise / sunset
06:53 AM / 06:58 PM
Friday, September 25
Sunny High 72° Low 63°Precipitation
2%
· 0.0 in
Max wind
13 mph
Humidity
48%
UV index
6 - High
Sunrise / sunset
06:54 AM / 06:56 PM
Saturday, September 26
Sunny High 70° Low 61°Precipitation
6%
· 0.0 in
Max wind
17 mph
Humidity
56%
UV index
5 - Moderate
Sunrise / sunset
06:55 AM / 06:55 PM
Sunday, September 27
Sunny High 69° Low 64°Precipitation
17%
· 0.0 in
Max wind
20 mph
Humidity
63%
UV index
6 - High
Sunrise / sunset
06:56 AM / 06:53 PM
Monday, September 28
Overcast High 71° Low 66°Precipitation
22%
· 0.0 in
Max wind
18 mph
Humidity
72%
UV index
5 - Moderate
Sunrise / sunset
06:57 AM / 06:51 PM
Tuesday, September 29
Patchy rain nearby High 73° Low 67°Precipitation
71%
· 0.07 in
Max wind
11 mph
Humidity
78%
UV index
5 - Moderate
Sunrise / sunset
06:58 AM / 06:50 PM
Istanbul 14-day outlook: the story
The warmest day of Istanbul's 14-day outlook is Monday, September 21 with a high near 78°F (26°C); the coolest night comes Wednesday, September 23, dipping to 59°F (15°C). The trend points cooler: week two runs about 5°F below week one. Highs over the next two weeks average 75°F (24°C), about 3°F (2°C) below the typical September high of 78°F (26°C).
Precipitation is most likely on Wednesday 16, Thursday 17, Tuesday 29; the wettest day looks like Tuesday, September 29 with about 0.07 in (1.9 mm) expected. For the weekend, expect Saturday 78°F (26°C) and sunny / Sunday 77°F (25°C) and overcast.
For typical conditions month by month, see the Istanbul climate & average temperatures guide.
Istanbul forecast questions
Will it rain in Istanbul this week?
The forecast currently shows meaningful precipitation chances on 3 of the next 14 days, peaking around Tuesday, September 29.
What will be the warmest day in Istanbul over the next 14 days?
Monday, September 21, with a forecast high near 78°F (26°C).
How accurate is a 14-day forecast for Istanbul?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Istanbul by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 48° | 39° | 13 | 4.3 in | 5.5 h/day | 79% |
| February | 51° | 40° | 11 | 3.0 in | 6.8 h/day | 79% |
| March | 54° | 42° | 11 | 3.0 in | 7.8 h/day | 79% |
| April | 62° | 47° | 9 | 2.2 in | 10.2 h/day | 75% |
| May | 70° | 56° | 8 | 2.2 in | 11.7 h/day | 76% |
| June | 79° | 65° | 8 | 2.0 in | 12.9 h/day | 76% |
| July | 84° | 69° | 5 | 1.2 in | 13.5 h/day | 71% |
| August | 84° | 71° | 3 | 0.8 in | 12.6 h/day | 72% |
| September | 78° | 65° | 8 | 1.9 in | 10.9 h/day | 72% |
| October | 68° | 57° | 7 | 2.2 in | 8.4 h/day | 78% |
| November | 61° | 50° | 9 | 3.3 in | 7.1 h/day | 78% |
| December | 53° | 44° | 12 | 3.5 in | 5.5 h/day | 80% |