Weather risk planner
Weather risk for filming in Prague
Three exterior days in Prague in January: rain hits at least one with 77 % probability. In September it is 66 %. The tool is set to Prague — enter your own days.
- At least one day hit
- 77 %
- 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 Prague, month by month
Prague averages 12 rain days in January and 9 in September. 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 | 12 | 77 % | 91 % | 3 | 4.0 h | 0.9 °C |
| February | 10 | 73 % | 89 % | 3 | 5.8 h | 2.6 °C |
| March | 10 | 69 % | 86 % | 3 | 7.7 h | 5.3 °C |
| April | 10 | 70 % | 87 % | 3 | 9.6 h | 9.6 °C |
| May | 12 | 77 % | 91 % | 3 | 10.7 h | 14.4 °C |
| June | 12 | 78 % | 92 % | 3 | 12.3 h | 19.6 °C |
| July | 11 | 73 % | 89 % | 3 | 12.4 h | 21.0 °C |
| August | 11 | 73 % | 89 % | 3 | 10.8 h | 20.8 °C |
| September | 9 | 66 % | 83 % | 3 | 9.1 h | 16.0 °C |
| October | 11 | 73 % | 89 % | 3 | 6.4 h | 10.9 °C |
| November | 10 | 70 % | 87 % | 3 | 4.3 h | 5.2 °C |
| December | 11 | 73 % | 89 % | 3 | 3.9 h | 2.6 °C |
When to shoot exteriors in Prague
Weighing daylight against rain days, July comes out best: 15 h 58 min of daylight, 11 rain days and 12.4 hours of sunshine a day. The sunniest month is July (12.4 h a day).
The rain risk barely moves through the year in Prague: five exterior days run a 83 % to 92 % risk of losing at least one day, whatever the month. Choosing the month buys you little here; cover days and a flexible schedule buy you more.
Rain days are not grey days: even in January, the wettest month, the sun shines 4.0 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 Prague?
January, with 12 days of at least 1 mm rain on average (2015–2024). The driest is September with 9.
How many cover days should I plan for an exterior shoot in Prague?
For five exterior days and 90 % certainty: 3 in September, 3 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.