Vienna vs Brno: which is sunnier?
🇦🇹 Austria vs 🇨🇿 Czechia · 116 km apart · long-term climate normals (NASA POWER, 2001–2020)
Vienna is the sunnier overall: about 1,794 hours of sunshine a year to Brno's 1,643. Vienna has the higher Sunshine Score in 4 of 12 months; the other 8 are within 2 points.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Vienna | Brno | |
|---|---|---|
| Sunshine hours / year | 1,794 | 1,643 |
| Sunniest month | May (76/100) | September (77/100) |
| Nov–Feb average score | 2/100 | 0/100 |
| Jun–Aug average score | 76/100 | 75/100 |
| Rain / year | 636 mm | 591 mm |
| Peak midday UV | 6 (high) | 5 (moderate) |
Vienna vs Brno month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Vienna | Brno | Vienna | Brno | Vienna | Brno | |
| January | 0 | 0 | 2° | 1° | 40 | 38 |
| February | 0 | 0 | 5° | 3° | 36 | 32 |
| March | 14 | 7 | 10° | 9° | 41 | 36 |
| April | 62 | 55 | 17° | 16° | 35 | 34 |
| May | 76 | 76 | 21° | 20° | 71 | 67 |
| June | 76 | 75 | 26° | 25° | 73 | 69 |
| July | 76 | 75 | 29° | 28° | 69 | 70 |
| August | 76 | 76 | 28° | 27° | 69 | 64 |
| September | 76 | 77 | 22° | 21° | 69 | 61 |
| October | 47 | 40 | 15° | 14° | 49 | 44 |
| November | 7 | 0 | 9° | 8° | 43 | 38 |
| December | 0 | 0 | 3° | 2° | 41 | 38 |
The sunnier month by month: Jan even · Feb even · Mar Vienna · Apr Vienna · May even · Jun even · Jul even · Aug even · Sep even · Oct Vienna · Nov Vienna · Dec even.
When to pick which
- November–February: too close to call — Vienna averages 2/100, Brno 0/100. Daytime highs are similar (5°C vs 4°C). See the winter sun ranking.
- March–May: Vienna (average score 51/100 vs 46). Daytime highs are similar (16°C vs 15°C).
- June–August: too close to call — Vienna averages 76/100, Brno 75/100. Daytime highs are similar (28°C vs 27°C).
- September–October: Vienna (average score 62/100 vs 59). Daytime highs are similar (19°C vs 18°C).
Full month-by-month guides: Vienna weather by month · Brno weather by month · Best time to visit Austria · Best time to visit Czechia.
More comparisons: Vienna vs Bratislava · Vienna vs Graz · Brno vs Prague · Brno vs Ostrava · Brno vs Bratislava · all head-to-heads