Boise weather in October
October in Boise: cool, dry, with clean air — an excellent time to visit.
#4 of 12 months in Boise · #146 of 604 destinations to visit in October · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Boise climate normals — October
| Daytime high | 19°C / 66°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 44°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 22 mm / 0.9 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 55% | 🍃 comfortable |
| Dew point | 3°C / 38°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 11 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Boise?
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Boise in October — FAQ
- Is October a good time to visit Boise?
- October in Boise: cool, dry, with clean air — an excellent time to visit. It ranks #4 of 12 months for Boise on SeasonMap's comfort score (85/100).
- What is the weather like in Boise in October?
- In October, Boise averages a daily high of 18.7°C and a low of 6.6°C, with about 22 mm of rain over roughly 4 rainy days.
- What is the air quality in Boise in October?
- Boise has a mean US Air Quality Index of about 30 in October.