Weather risk planner
Weather risk for filming in Istanbul
Three exterior days in Istanbul in January: rain hits at least one with 84 % probability. In August it is 34 %. The tool is set to Istanbul — enter your own days.
- At least one day hit
- 84 %
- Expected lost days
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- Cover days to hold
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- Risk per day
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- Rain days in month
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- Sunshine per day
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- Daylight
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- Mean temperature
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Your shoot, played out 20 times
Same number of days in every month — click a month
- risk of at least one lost day
- sunshine hours per day
| Lost days | Probability | This many or fewer |
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Rain risk in Istanbul, month by month
Istanbul averages 14 rain days in January and 4 in August. A rain day here is any day with at least 1 mm of precipitation, averaged over 2015–2024. The risk columns assume every exterior day can be lost; the cover-day column is what you need to be 90 % sure a five-day exterior block finishes.
| Month | Rain days | 3 days: ≥ 1 hit | 5 days: ≥ 1 hit | Cover days (5 d, 90 %) | Sun/day | Mean temp |
|---|---|---|---|---|---|---|
| January | 14 | 84 % | 95 % | 4 | 5.5 h | 6.3 °C |
| February | 11 | 77 % | 92 % | 3 | 6.8 h | 7.4 °C |
| March | 11 | 73 % | 89 % | 3 | 7.8 h | 8.6 °C |
| April | 9 | 66 % | 83 % | 3 | 10.2 h | 12.4 °C |
| May | 9 | 64 % | 82 % | 3 | 11.7 h | 17.0 °C |
| June | 9 | 66 % | 83 % | 3 | 12.9 h | 22.0 °C |
| July | 5 | 41 % | 58 % | 2 | 13.5 h | 24.6 °C |
| August | 4 | 34 % | 50 % | 2 | 12.6 h | 25.0 °C |
| September | 8 | 61 % | 79 % | 3 | 10.9 h | 21.6 °C |
| October | 8 | 59 % | 78 % | 3 | 8.4 h | 16.6 °C |
| November | 9 | 66 % | 83 % | 3 | 7.1 h | 12.8 °C |
| December | 13 | 80 % | 93 % | 4 | 5.5 h | 8.8 °C |
When to shoot exteriors in Istanbul
Weighing daylight against rain days, July comes out best: 14 h 51 min of daylight, 5 rain days and 13.5 hours of sunshine a day. The sunniest month is July (13.5 h a day).
The month matters here: five exterior days run a 50 % risk of losing at least one day in August, but 95 % in January — 2 against 4 cover days for 90 % certainty.
Rain days are not grey days: even in January, the wettest month, the sun shines 5.5 hours a day on average. Many of those rain days are wet for an hour, not all day — if your scenes can wait out a shower, lower the share slider in the tool.
Frequently asked
What is the rainiest month in Istanbul?
January, with 14 days of at least 1 mm rain on average (2015–2024). The driest is August with 4.
How many cover days should I plan for an exterior shoot in Istanbul?
For five exterior days and 90 % certainty: 2 in August, 4 in January. The tool above calculates it for your exact number of days.
Is this a weather forecast?
No — it is climate: what the last ten years looked like on average. From about ten days before the shoot, the national weather service forecast is the better source.