Vilnius, Lithuania is most comfortable in April, May, September. The toughest month for heat is January (comfort 80/100). In August, daytime highs average 23.1°C (feels like 22.8°C) with 1.2 days over 30°C and 0.4 tropical nights.
| Month | Avg high | Avg low | Feels like | Days ≥30°C | Days ≥35°C | Nights ≥20°C | Comfort |
|---|---|---|---|---|---|---|---|
| January | 0° | -4.2° | -4.6° | 0 | 0 | 0 | 80 |
| February | 0.7° | -4.4° | -3.9° | 0 | 0 | 0 | 82 |
| March | 6.9° | -1.1° | 2.4° | 0 | 0 | 0 | 97 |
| April | 11.9° | 3° | 8.1° | 0 | 0 | 0 | 100 |
| May | 16.6° | 6.8° | 13.9° | 0 | 0 | 0 | 100 |
| June | 22.3° | 12.5° | 21.6° | 1 | 0 | 0.4 | 98 |
| July | 23.7° | 14.9° | 23.7° | 1 | 0 | 0.8 | 98 |
| August | 23.1° | 14° | 22.8° | 1.2 | 0 | 0.4 | 98 |
| September | 18.3° | 10.2° | 16.4° | 0 | 0 | 0 | 100 |
| October | 11.3° | 5.1° | 8.1° | 0 | 0 | 0 | 100 |
| November | 4.5° | 0.8° | 0.9° | 0 | 0 | 0 | 91 |
| December | 0.6° | -3° | -3.7° | 0 | 0 | 0 | 82 |
No. August daytime highs in Vilnius average a comfortable 23.1°C with 1.2 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 Vilnius are April, May, September. The toughest month for heat is January, scoring 80/100 on our heat-comfort index.
In August, nights in Vilnius average a low of 14°C, with 0.4 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.