Tromsø vs Alta: which is sunnier?
🇳🇴 Norway vs 🇳🇴 Norway · 174 km apart · long-term climate normals (NASA POWER, 2001–2020)
Alta is the sunnier overall: about 1,800 hours of sunshine a year to Tromsø's 1,713. Tromsø 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.
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At a glance
| Tromsø | Alta | |
|---|---|---|
| Sunshine hours / year | 1,713 | 1,800 |
| Sunniest month | July (51/100) | July (52/100) |
| Nov–Feb average score | 0/100 | 0/100 |
| Jun–Aug average score | 42/100 | 39/100 |
| Rain / year | 1,347 mm | 956 mm |
| Peak midday UV | 3 (moderate) | 3 (moderate) |
Tromsø vs Alta month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Tromsø | Alta | Tromsø | Alta | Tromsø | Alta | |
| January | 0 | 0 | -4° | -5° | 106 | 61 |
| February | 0 | 0 | -4° | -5° | 109 | 59 |
| March | 0 | 0 | -1° | -1° | 120 | 72 |
| April | 0 | 0 | 3° | 2° | 89 | 59 |
| May | 6 | 0 | 9° | 6° | 95 | 82 |
| June | 29 | 23 | 13° | 12° | 106 | 108 |
| July | 51 | 52 | 17° | 17° | 112 | 111 |
| August | 45 | 41 | 16° | 15° | 113 | 100 |
| September | 16 | 12 | 11° | 10° | 137 | 82 |
| October | 0 | 0 | 4° | 3° | 122 | 82 |
| November | 0 | 0 | 0° | -1° | 114 | 67 |
| December | 0 | 0 | -2° | -3° | 124 | 73 |
The sunnier month by month: Jan even · Feb even · Mar even · Apr even · May Tromsø · Jun Tromsø · Jul even · Aug Tromsø · Sep Tromsø · Oct even · Nov even · Dec even.
When to pick which
- November–February: too close to call — Tromsø averages 0/100, Alta 0/100. Daytime highs are similar (-2°C vs -3°C). See the winter sun ranking.
- March–May: too close to call — Tromsø averages 2/100, Alta 0/100. Tromsø is the warmer, around 4°C daytime highs vs 2°C.
- June–August: Tromsø (average score 42/100 vs 39). Daytime highs are similar (15°C vs 15°C).
- September–October: too close to call — Tromsø averages 8/100, Alta 6/100. Daytime highs are similar (8°C vs 7°C).
Full month-by-month guides: Tromsø weather by month · Alta weather by month · Best time to visit Norway.
More comparisons: Tromsø vs Harstad/Narvik · Tromsø vs Bodø · Tromsø vs Kittilä · Alta vs Harstad/Narvik · Alta vs Kittilä · Alta vs Ivalo · all head-to-heads