Vienna is warmest in July, averaging 27° by day and 15° at night. The wettest month is August with 112 mm, and the year brings about 754 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 4° | -4° | 37 mm | 8.6 h | Cool |
| February | 8° | -3° | 31 mm | 9.9 h | Cool |
| March | 11° | 0° | 28 mm | 11.6 h | Cool |
| April | 14° | 5° | 54 mm | 13.4 h | Mild |
| May | 19° | 9° | 90 mm | 15.0 h | Sightseeing |
| June | 25° | 13° | 90 mm | 15.8 h | Sightseeing |
| July | 27° | 15° | 71 mm | 15.5 h | Beach weather |
| August | 27° | 15° | 112 mm | 14.1 h | Mild |
| September | 22° | 11° | 96 mm | 12.3 h | Sightseeing |
| October | 17° | 6° | 53 mm | 10.5 h | Sightseeing |
| November | 9° | 2° | 39 mm | 9.0 h | Cool |
| December | 4° | -2° | 53 mm | 8.2 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: July — highs around 27°, nights no colder than 15°, and at most 71 mm of rain in a month.
Walking the city: May, June, September and October — highs of 17–25° and no more than 96 mm of rain a month.