Weather risk for filming in Grünwald
Grünwald averages 18 rain days in May — a three-day exterior shoot then hits at least one with 94 % probability. In February (12 rain days) the same risk drops to 78 %. The calculator above is preset to Grünwald and runs the numbers for your count of exterior days.
Weather risk calculator for Grünwald
- 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 Grünwald 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 | 14 | 0.2 °C | 4.7 | 85 % |
| February | 12 | 2.2 °C | 6.3 | 78 % |
| March | 13 | 4.9 °C | 8.0 | 82 % |
| April | 13 | 8.5 °C | 9.5 | 82 % |
| May | 18 | 12.5 °C | 9.6 | 94 % |
| June | 15 | 17.5 °C | 11.5 | 88 % |
| July | 15 | 19.0 °C | 11.7 | 88 % |
| August | 14 | 18.8 °C | 10.6 | 85 % |
| September | 13 | 14.3 °C | 8.9 | 82 % |
| October | 13 | 10.4 °C | 6.8 | 82 % |
| November | 12 | 4.6 °C | 5.1 | 78 % |
| December | 13 | 1.9 °C | 4.4 | 82 % |
The best month for exteriors
Combining daylight and rain days, June comes out ahead in Grünwald: 16h 01min of usable light against 15 mean rain days. The driest month (February) 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 Grünwald?
February, with a mean of 12 rain days. The most falls in May with 18.
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 Grünwald?
On light and rain combined, June. The matching sun times live on the golden-hour page for Grünwald and on the city page.