Idaho Falls vs Jackson: which is sunnier?
🇺🇸 United States vs 🇺🇸 United States · 108 km apart · long-term climate normals (NASA POWER, 2001–2020)
Idaho Falls is the sunnier overall: about 2,995 hours of sunshine a year to Jackson's 2,836. Idaho Falls has the higher Sunshine Score in 3 of 12 months; the other 9 are within 2 points.
Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.


At a glance
| Idaho Falls | Jackson | |
|---|---|---|
| Sunshine hours / year | 2,995 | 2,836 |
| Sunniest month | July (93/100) | July (91/100) |
| Nov–Feb average score | 0/100 | 0/100 |
| Jun–Aug average score | 91/100 | 89/100 |
| Rain / year | 543 mm | 656 mm |
| Peak midday UV | 9 (very high) | 9 (very high) |
Idaho Falls vs Jackson month by month
| Month | Sunshine Score | Day high °C | Rain mm | |||
|---|---|---|---|---|---|---|
| Idaho Falls | Jackson | Idaho Falls | Jackson | Idaho Falls | Jackson | |
| January | 0 | 0 | -1° | -3° | 57 | 69 |
| February | 0 | 0 | 1° | -2° | 48 | 62 |
| March | 0 | 0 | 8° | 2° | 51 | 60 |
| April | 36 | 0 | 13° | 7° | 56 | 63 |
| May | 80 | 42 | 19° | 14° | 54 | 63 |
| June | 89 | 87 | 25° | 21° | 42 | 50 |
| July | 93 | 91 | 32° | 27° | 19 | 24 |
| August | 92 | 90 | 30° | 26° | 25 | 31 |
| September | 89 | 87 | 24° | 20° | 40 | 46 |
| October | 44 | 21 | 14° | 11° | 45 | 54 |
| November | 0 | 0 | 6° | 3° | 47 | 61 |
| December | 0 | 0 | 0° | -3° | 59 | 73 |
The sunnier month by month: Jan even · Feb even · Mar even · Apr Idaho Falls · May Idaho Falls · Jun even · Jul even · Aug even · Sep even · Oct Idaho Falls · Nov even · Dec even.
When to pick which
- November–February: too close to call — Idaho Falls averages 0/100, Jackson 0/100. Idaho Falls is the warmer, around 2°C daytime highs vs -1°C. See the winter sun ranking.
- March–May: Idaho Falls (average score 39/100 vs 14). Idaho Falls is the warmer, around 13°C daytime highs vs 8°C.
- June–August: too close to call — Idaho Falls averages 91/100, Jackson 89/100. Idaho Falls is the warmer, around 29°C daytime highs vs 25°C.
- September–October: Idaho Falls (average score 67/100 vs 54). Idaho Falls is the warmer, around 19°C daytime highs vs 16°C.
Full month-by-month guides: Idaho Falls weather by month · Jackson weather by month · Best time to visit United States.
More comparisons: Idaho Falls vs Salt Lake City · Idaho Falls vs Provo · Idaho Falls vs Boise · Jackson vs Salt Lake City · Jackson vs Billings · Jackson vs Bozeman · all head-to-heads