Okayama vs Izumo: which is sunnier?
🇯🇵 Japan vs 🇯🇵 Japan · 114 km apart · long-term climate normals (NASA POWER, 2001–2020)
Okayama is the sunnier overall: about 1,914 hours of sunshine a year to Izumo's 1,647. Izumo has the higher Sunshine Score in 4 of 12 months, Okayama in 3 (5 within 2 points).
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.
At a glance
| Okayama | Izumo | |
|---|---|---|
| Sunshine hours / year | 1,914 | 1,647 |
| Sunniest month | August (68/100) | May (65/100) |
| Nov–Feb average score | 9/100 | 15/100 |
| Jun–Aug average score | 64/100 | 62/100 |
| Rain / year | 1,487 mm | 1,738 mm |
| Peak midday UV | 8 (very high) | 7 (high) |
Okayama vs Izumo month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Okayama | Izumo | Okayama | Izumo | Okayama | Izumo | |
| January | 0 | 0 | 5° | 8° | 86 | 132 |
| February | 0 | 6 | 7° | 9° | 81 | 108 |
| March | 18 | 22 | 11° | 12° | 103 | 124 |
| April | 53 | 45 | 17° | 16° | 105 | 116 |
| May | 67 | 65 | 23° | 21° | 122 | 124 |
| June | 62 | 61 | 26° | 25° | 172 | 182 |
| July | 62 | 61 | 29° | 28° | 212 | 221 |
| August | 68 | 65 | 30° | 30° | 120 | 125 |
| September | 62 | 61 | 26° | 26° | 179 | 204 |
| October | 67 | 63 | 20° | 21° | 122 | 138 |
| November | 37 | 45 | 14° | 16° | 83 | 111 |
| December | 0 | 10 | 8° | 10° | 102 | 153 |
The sunnier month by month: Jan even · Feb Izumo · Mar Izumo · Apr Okayama · May even · Jun even · Jul even · Aug Okayama · Sep even · Oct Okayama · Nov Izumo · Dec Izumo.
When to pick which
- November–February: Izumo (average score 15/100 vs 9). Izumo is the warmer, around 11°C daytime highs vs 9°C. See the winter sun ranking.
- March–May: too close to call — Okayama averages 46/100, Izumo 44/100. Daytime highs are similar (17°C vs 16°C).
- June–August: too close to call — Okayama averages 64/100, Izumo 62/100. Daytime highs are similar (28°C vs 28°C).
- September–October: Okayama (average score 65/100 vs 62). Daytime highs are similar (23°C vs 24°C).
Full month-by-month guides: Okayama weather by month · Izumo weather by month · Best time to visit Japan.
More comparisons: Okayama vs Hiroshima · Okayama vs Tottori · Okayama vs Takamatsu · Izumo vs Hiroshima · Izumo vs Tottori · Izumo vs Yonago · all head-to-heads