Helsinki (Vantaa) vs Tallinn: which is sunnier?
🇫🇮 Finland vs 🇪🇪 Estonia · 101 km apart · long-term climate normals (NASA POWER, 2001–2020)
Tallinn is the sunnier overall: about 1,693 hours of sunshine a year to Helsinki (Vantaa)'s 1,584. Helsinki (Vantaa) has the higher Sunshine Score in 2 of 12 months, Tallinn in 1 (9 within 2 points).
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
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At a glance
| Helsinki (Vantaa) | Tallinn | |
|---|---|---|
| Sunshine hours / year | 1,584 | 1,693 |
| Sunniest month | July (75/100) | July (76/100) |
| Nov–Feb average score | 0/100 | 0/100 |
| Jun–Aug average score | 73/100 | 69/100 |
| Rain / year | 732 mm | 684 mm |
| Warmest sea | 20°C / 68°F | 20°C / 68°F |
| Peak midday UV | 4 (moderate) | 4 (moderate) |
Helsinki (Vantaa) vs Tallinn month by month
| Month | Sunshine Score | Day high °C | Rain mm | Sea °C | ||||
|---|---|---|---|---|---|---|---|---|
| Helsinki (Vantaa) | Tallinn | Helsinki (Vantaa) | Tallinn | Helsinki (Vantaa) | Tallinn | Helsinki (Vantaa) | Tallinn | |
| January | 0 | 0 | -4° | -2° | 56 | 52 | 0° | 1° |
| February | 0 | 0 | -3° | -3° | 45 | 42 | 0° | 0° |
| March | 0 | 0 | 1° | 0° | 43 | 40 | 1° | 1° |
| April | 0 | 0 | 8° | 6° | 44 | 40 | 3° | 3° |
| May | 45 | 33 | 15° | 13° | 53 | 48 | 11° | 9° |
| June | 68 | 56 | 19° | 17° | 75 | 72 | 18° | 16° |
| July | 75 | 76 | 22° | 21° | 71 | 65 | 19° | 20° |
| August | 75 | 75 | 20° | 20° | 70 | 72 | 20° | 20° |
| September | 45 | 45 | 15° | 15° | 61 | 57 | 18° | 18° |
| October | 0 | 6 | 8° | 9° | 77 | 71 | 12° | 13° |
| November | 0 | 0 | 3° | 4° | 70 | 68 | 6° | 9° |
| December | 0 | 0 | -1° | 0° | 67 | 57 | 3° | 6° |
The sunnier month by month: Jan even · Feb even · Mar even · Apr even · May Helsinki (Vantaa) · Jun Helsinki (Vantaa) · Jul even · Aug even · Sep even · Oct Tallinn · Nov even · Dec even.
When to pick which
- November–February: too close to call — Helsinki (Vantaa) averages 0/100, Tallinn 0/100. Daytime highs are similar (-1°C vs 0°C). See the winter sun ranking.
- March–May: Helsinki (Vantaa) (average score 15/100 vs 11). Helsinki (Vantaa) is the warmer, around 8°C daytime highs vs 6°C.
- June–August: Helsinki (Vantaa) (average score 73/100 vs 69). Daytime highs are similar (20°C vs 19°C).
- September–October: Tallinn (average score 26/100 vs 23). Daytime highs are similar (12°C vs 12°C).
Sea temperature
Both seas peak at 20°C / 68°F. Swimmable water (21°C+): Helsinki (Vantaa) never, Tallinn never. Month-by-month sea temperatures are in the table above.
Full month-by-month guides: Helsinki (Vantaa) weather by month · Tallinn weather by month · Best time to visit Finland.
More comparisons: Helsinki (Vantaa) vs St. Petersburg · Helsinki (Vantaa) vs Riga · Tallinn vs St. Petersburg · Tallinn vs Stockholm · Tallinn vs Riga · all head-to-heads