Click on a day for an hourly weather forecast
The temperatures in Olsztyn in August are comfortable with low of 13°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Olsztyn during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Olsztyn in August 2026.
If you’re planning to visit Olsztyn in the near future, we highly recommend that you review the 14 day weather forecast for Olsztyn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -5° | 7 | 7 | 18 | 63 mm | Awful | Olsztyn in January |
| February | 1° / -4° | 5 | 7 | 16 | 51 mm | Awful | Olsztyn in February |
| March | 6° / -1° | 6 | 15 | 10 | 47 mm | Awful | Olsztyn in March |
| April | 13° / 3° | 5 | 22 | 3 | 52 mm | Bad | Olsztyn in April |
| May | 18° / 7° | 8 | 23 | 0 | 105 mm | Ok | Olsztyn in May |
| June | 22° / 11° | 8 | 22 | 0 | 114 mm | Ok | Olsztyn in June |
| July | 24° / 13° | 7 | 24 | 0 | 126 mm | Good | Olsztyn in July |
| August | 24° / 13° | 5 | 26 | 0 | 86 mm | Perfect | Olsztyn in August |
| September | 19° / 10° | 4 | 26 | 0 | 64 mm | Good | Olsztyn in September |
| October | 12° / 5° | 6 | 25 | 1 | 64 mm | Ok | Olsztyn in October |
| November | 6° / 2° | 7 | 19 | 4 | 63 mm | Awful | Olsztyn in November |
| December | 1° / -2° | 7 | 12 | 12 | 60 mm | Awful | Olsztyn in December |