Weather risk for filming in Cluj-Napoca
Cluj-Napoca averages 15 rain days in June — a three-day exterior shoot then hits at least one with 88 % probability. In October (7 rain days) the same risk drops to 55 %. The calculator above is preset to Cluj-Napoca and runs the numbers for your count of exterior days.
Weather risk calculator for Cluj-Napoca
- Risk per day
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- At least one day hit
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- Expected lost days
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Rain risk in Cluj-Napoca by month
The "risk (3 days)" column answers the question behind every weather contingency: how likely does a three-day exterior block lose at least one day? From roughly 60 % upward, a cover set stops being optional and belongs in the budget.
| Month | Rain days | Mean temp | Sun hours/day | Risk (3 days) |
|---|---|---|---|---|
| January | 11 | -0.9 °C | 5.1 | 75 % |
| February | 9 | 2.2 °C | 6.2 | 66 % |
| March | 9 | 5.1 °C | 8.3 | 66 % |
| April | 11 | 10.3 °C | 10.3 | 75 % |
| May | 14 | 15.2 °C | 11.6 | 85 % |
| June | 15 | 20.0 °C | 12.6 | 88 % |
| July | 13 | 21.4 °C | 13.2 | 82 % |
| August | 9 | 21.8 °C | 11.9 | 66 % |
| September | 9 | 16.6 °C | 10.0 | 66 % |
| October | 7 | 10.5 °C | 7.9 | 55 % |
| November | 9 | 5.0 °C | 5.3 | 66 % |
| December | 10 | 1.1 °C | 4.6 | 70 % |
The best month for exteriors
Combining daylight and rain days, August comes out ahead in Cluj-Napoca: 14h 15min of usable light against 9 mean rain days. The driest month (October) and the brightest are not automatically the same — which is exactly why the combined view matters.
For scheduling, a weather day costs more than the day itself: location availability, crew follow-on bookings and possibly the travel home. TillyGen puts the month's rain risk right next to the sun window inside the schedule — together they decide which day can happen outside.
Frequently asked
When does it rain least in Cluj-Napoca?
October, with a mean of 7 rain days. The most falls in June with 15.
How is the washout risk computed?
Rain days ÷ 30 gives the per-day hit probability; across N exterior days, 1 − (1 − p)ᴺ is the chance of at least one hit. Deliberately simple and conservative — it prices the month's structural risk rather than forecasting weather.
What is the best month to shoot in Cluj-Napoca?
On light and rain combined, August. The matching sun times live on the golden-hour page for Cluj-Napoca and on the city page.