Katmai National Park weather in August
August in Katmai National Park: nice, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Katmai National Park · #165 of 604 destinations to visit in August · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Katmai National Park climate normals — August
| Daytime high | 16°C / 61°F | 😎 nice |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 95 mm / 3.7 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 88% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 7 h/day | |
| Daylight | 15.3 h | |
| Wind | 9 km/h / 6 mph | |
| Air quality (US AQI) | 23 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Katmai National Park?
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Katmai National Park in August — FAQ
- Is August a good time to visit Katmai National Park?
- August in Katmai National Park: nice, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Katmai National Park on SeasonMap's comfort score (86/100).
- What is the weather like in Katmai National Park in August?
- In August, Katmai National Park averages a daily high of 16.1°C and a low of 10.9°C, with about 94.6 mm of rain over roughly 16.2 rainy days.
- What is the air quality in Katmai National Park in August?
- Katmai National Park has a mean US Air Quality Index of about 23 in August.