Click on a day for an hourly weather forecast
The temperatures in Tallinn in August are usually low and can range between 14°C and 20°C.
You can expect rain for roughly half of the month of August in Tallinn. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Tallinn in August 2025.
If you’re planning to visit Tallinn in the near future, we highly recommend that you review the 14 day weather forecast for Tallinn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -5° | 7 | 5 | 22 | 83 mm | Awful | Tallinn in January |
| February | -2° / -5° | 6 | 3 | 21 | 71 mm | Awful | Tallinn in February |
| March | 1° / -3° | 10 | 5 | 19 | 67 mm | Awful | Tallinn in March |
| April | 7° / 1° | 7 | 15 | 8 | 60 mm | Awful | Tallinn in April |
| May | 13° / 6° | 6 | 24 | 1 | 77 mm | Ok | Tallinn in May |
| June | 18° / 11° | 7 | 23 | 0 | 114 mm | Ok | Tallinn in June |
| July | 21° / 14° | 8 | 23 | 0 | 131 mm | Ok | Tallinn in July |
| August | 20° / 14° | 8 | 23 | 0 | 139 mm | Ok | Tallinn in August |
| September | 16° / 10° | 7 | 23 | 0 | 106 mm | Ok | Tallinn in September |
| October | 9° / 5° | 10 | 18 | 4 | 108 mm | Awful | Tallinn in October |
| November | 5° / 2° | 10 | 12 | 8 | 93 mm | Awful | Tallinn in November |
| December | 1° / -2° | 9 | 5 | 20 | 91 mm | Awful | Tallinn in December |