Vienna, Austria is most comfortable in February, March, April. The toughest month for heat is July (comfort 64/100). In August, daytime highs average 26.9°C (feels like 27°C) with 9 days over 30°C and 5.8 tropical nights.
| Month | Avg high | Avg low | Feels like | Days ≥30°C | Days ≥35°C | Nights ≥20°C | Comfort |
|---|---|---|---|---|---|---|---|
| January | 5° | -0.9° | 0.6° | 0 | 0 | 0 | 92 |
| February | 7.9° | 0.9° | 3.7° | 0 | 0 | 0 | 100 |
| March | 12° | 2.3° | 8° | 0 | 0 | 0 | 100 |
| April | 15° | 5.8° | 11.7° | 0 | 0 | 0 | 100 |
| May | 19.8° | 10.4° | 18.1° | 0 | 0 | 0 | 100 |
| June | 26.1° | 15.8° | 26.2° | 5 | 0.2 | 2.4 | 78 |
| July | 27.5° | 17.6° | 27.5° | 8.4 | 0.4 | 5 | 64 |
| August | 26.9° | 17.1° | 27° | 9 | 0.4 | 5.8 | 66 |
| September | 22° | 12.9° | 20.8° | 1 | 0 | 0 | 99 |
| October | 16.3° | 8.3° | 14° | 0 | 0 | 0 | 100 |
| November | 8.8° | 2.7° | 5.5° | 0 | 0 | 0 | 100 |
| December | 5° | 0.3° | 1.3° | 0 | 0 | 0 | 93 |
Destinations scoring 75+ for August heat comfort:
No. August daytime highs in Vienna average a comfortable 26.9°C with 9 days over 30°C — it's a solid summer choice for avoiding extreme heat.
Based on 5 years of climate data, the most comfortable months in Vienna are February, March, April. The toughest month for heat is July, scoring 64/100 on our heat-comfort index.
In August, nights in Vienna average a low of 17.1°C, with 5.8 tropical nights per month (nights that stay at or above 20°C) — a key factor for sleep quality if your stay has no air conditioning.
Tell us where and when you're going. If a heatwave becomes likely for your dates, we'll email you early — with cooler day-by-day alternatives nearby.