Weather risk planner
Weather risk for filming in Reykjavík
Three exterior days in Reykjavík in May: rain hits at least one with 94 % probability. In August it is 84 %. The tool is set to Reykjavík — enter your own days.
- At least one day hit
- 94 %
- Expected lost days
- —
- Cover days to hold
- —
- Risk per day
- —
- Rain days in month
- —
- Sunshine per day
- —
- Daylight
- —
- Mean temperature
- —
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 |
|---|
Runs in your browser. Nothing you enter is sent anywhere.
Rain risk in Reykjavík, month by month
Reykjavík averages 19 rain days in May and 14 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 | 18 | 93 % | 99 % | 4 | 1.5 h | -0.6 °C |
| February | 17 | 94 % | 99 % | 4 | 3.4 h | -0.1 °C |
| March | 17 | 91 % | 98 % | 4 | 6.1 h | 0.8 °C |
| April | 17 | 92 % | 98 % | 4 | 7.5 h | 3.7 °C |
| May | 19 | 94 % | 99 % | 4 | 9.4 h | 6.3 °C |
| June | 16 | 90 % | 98 % | 4 | 9.1 h | 9.2 °C |
| July | 16 | 89 % | 97 % | 4 | 9.6 h | 11.1 °C |
| August | 14 | 84 % | 95 % | 4 | 8.8 h | 10.7 °C |
| September | 18 | 94 % | 99 % | 4 | 6.2 h | 8.1 °C |
| October | 18 | 93 % | 99 % | 4 | 4.3 h | 4.9 °C |
| November | 16 | 90 % | 98 % | 4 | 2.2 h | 2.1 °C |
| December | 18 | 93 % | 99 % | 4 | 0.7 h | -0.4 °C |
When to shoot exteriors in Reykjavík
Weighing daylight against rain days, June comes out best: 21 h 02 min of daylight, 16 rain days and 9.1 hours of sunshine a day. The sunniest month is July (9.6 h a day).
The rain risk barely moves through the year in Reykjavík: five exterior days run a 95 % to 99 % 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 May, the wettest month, the sun shines 9.4 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 Reykjavík?
May, with 19 days of at least 1 mm rain on average (2015–2024). The driest is August with 14.
How many cover days should I plan for an exterior shoot in Reykjavík?
For five exterior days and 90 % certainty: 4 in August, 4 in May. 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.