Nairobi vs Arusha: which is sunnier?
🇰🇪 Kenya vs 🇹🇿 Tanzania · 235 km apart · long-term climate normals (NASA POWER, 2001–2020)
Nairobi is the sunnier overall: about 2,913 hours of sunshine a year to Arusha's 2,565. Nairobi has the higher Sunshine Score in 8 of 12 months; the other 4 are within 2 points.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Nairobi | Arusha | |
|---|---|---|
| Sunshine hours / year | 2,913 | 2,565 |
| Sunniest month | July (93/100) | July (92/100) |
| Nov–Feb average score | 86/100 | 74/100 |
| Jun–Aug average score | 92/100 | 91/100 |
| Rain / year | 601 mm | 870 mm |
| Peak midday UV | 14 (extreme) | 13 (extreme) |
Nairobi vs Arusha month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Nairobi | Arusha | Nairobi | Arusha | Nairobi | Arusha | |
| January | 89 | 78 | 27° | 32° | 39 | 88 |
| February | 91 | 73 | 29° | 33° | 29 | 73 |
| March | 84 | 75 | 29° | 32° | 64 | 105 |
| April | 75 | 67 | 27° | 29° | 114 | 147 |
| May | 83 | 77 | 25° | 27° | 73 | 90 |
| June | 92 | 91 | 25° | 27° | 25 | 18 |
| July | 93 | 92 | 26° | 28° | 16 | 9 |
| August | 92 | 91 | 26° | 29° | 22 | 14 |
| September | 93 | 91 | 28° | 31° | 20 | 17 |
| October | 87 | 82 | 28° | 32° | 53 | 66 |
| November | 81 | 70 | 26° | 31° | 81 | 133 |
| December | 84 | 74 | 26° | 31° | 65 | 110 |
The sunnier month by month: Jan Nairobi · Feb Nairobi · Mar Nairobi · Apr Nairobi · May Nairobi · Jun even · Jul even · Aug even · Sep even · Oct Nairobi · Nov Nairobi · Dec Nairobi.
When to pick which
- November–February: Nairobi (average score 86/100 vs 74). Arusha is the warmer, around 32°C daytime highs vs 27°C.
- March–May: Nairobi (average score 81/100 vs 73). Arusha is the warmer, around 29°C daytime highs vs 27°C.
- June–August: too close to call — Nairobi averages 92/100, Arusha 91/100. Arusha is the warmer, around 28°C daytime highs vs 26°C.
- September–October: Nairobi (average score 90/100 vs 87). Arusha is the warmer, around 32°C daytime highs vs 28°C.
Full month-by-month guides: Nairobi weather by month · Arusha weather by month · Best time to visit Tanzania.
More comparisons: Nairobi vs Mogadishu · Nairobi vs Mombasa · Nairobi vs Kigali · Arusha vs Dar es Salaam · Arusha vs Mombasa · Arusha vs Kigali · all head-to-heads