Indianapolis vs Dayton: which is sunnier?
🇺🇸 United States vs 🇺🇸 United States · 178 km apart · long-term climate normals (NASA POWER, 2001–2020)
Indianapolis and Dayton are virtually tied for annual sunshine — about 2,168 vs 2,149 hours a year. Indianapolis has the higher Sunshine Score in 4 of 12 months, Dayton in 2 (6 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
| Indianapolis | Dayton | |
|---|---|---|
| Sunshine hours / year | 2,168 | 2,149 |
| Sunniest month | September (76/100) | September (77/100) |
| Nov–Feb average score | 5/100 | 3/100 |
| Jun–Aug average score | 71/100 | 74/100 |
| Rain / year | 1,194 mm | 1,035 mm |
| Peak midday UV | 8 (very high) | 7 (high) |
Indianapolis vs Dayton month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Indianapolis | Dayton | Indianapolis | Dayton | Indianapolis | Dayton | |
| January | 0 | 0 | 2° | 1° | 81 | 69 |
| February | 0 | 0 | 4° | 3° | 73 | 62 |
| March | 12 | 6 | 10° | 9° | 98 | 89 |
| April | 58 | 55 | 18° | 17° | 119 | 99 |
| May | 69 | 71 | 23° | 22° | 125 | 112 |
| June | 67 | 71 | 27° | 26° | 135 | 111 |
| July | 71 | 74 | 29° | 28° | 114 | 97 |
| August | 75 | 76 | 29° | 29° | 88 | 82 |
| September | 76 | 77 | 26° | 25° | 83 | 77 |
| October | 67 | 64 | 19° | 18° | 99 | 82 |
| November | 19 | 13 | 11° | 10° | 88 | 77 |
| December | 0 | 0 | 4° | 4° | 91 | 78 |
The sunnier month by month: Jan even · Feb even · Mar Indianapolis · Apr Indianapolis · May even · Jun Dayton · Jul Dayton · Aug even · Sep even · Oct Indianapolis · Nov Indianapolis · Dec even.
When to pick which
- November–February: too close to call — Indianapolis averages 5/100, Dayton 3/100. Daytime highs are similar (5°C vs 5°C). See the winter sun ranking.
- March–May: too close to call — Indianapolis averages 46/100, Dayton 44/100. Daytime highs are similar (17°C vs 16°C).
- June–August: Dayton (average score 74/100 vs 71). Daytime highs are similar (28°C vs 28°C).
- September–October: too close to call — Indianapolis averages 72/100, Dayton 71/100. Daytime highs are similar (23°C vs 22°C).
Full month-by-month guides: Indianapolis weather by month · Dayton weather by month · Best time to visit United States.
More comparisons: Indianapolis vs Cincinnati / Covington · Indianapolis vs Fort Wayne · Indianapolis vs Evansville · Dayton vs Cincinnati / Covington · Dayton vs Columbus · Dayton vs Lexington · all head-to-heads