Katmai National Park in september: average Weather, Temperature and Climate
Weather in Katmai National Park in september 2025
The weather in Katmai National Park in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather 12.3cm
Weather at 6am
43°F
Clear/Sunny
21% of time
19%
17%
16%
Weather at 12pm
52°F
Moderate rain at times
24% of time
22%
22%
19%
Weather at 6pm
54°F
Moderate rain at times
38% of time
20%
19%
14%
Weather at 3am
43°F
21%
20%
19%
17%
Evolution of daily average temperature and precipitation in Katmai National Park in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Katmai National Park in september.
The climate of Katmai National Park in september is tolerable
In september in Katmai National Park, the climate is wet (with 4.8in of precipitation over 7 days). This is better than the previous month since in august it receives an average of 5.2in of precipitation over 9 days.
The climate is fairly cool here the month of september, but it is livable when dressing cosy. The thermometer averaged maximum of 56°F. The seasonal minimum is 43°F. Thus, the mean temperature average on this month of september in Katmai National Park is 49°F. Note that seasonal normals in contrast with those observed in Katmai National Park in the month of september with a maximum record of 70°F in 2016 and a minimum record of 23°F in 2010. You need to prepare to have about 3 days with temperatures down below 32°F, or 10% of time.
Day length in Katmai National Park in september is 12:48. The sun rises at 06:51 and sets at 19:39.
With a correct climate, september is okay (but not good) to go there in Alaska.
Seasonal average climate and temperature of Katmai National Park in september
Check below seasonal norms These statistics are compiled from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 49°F | ||||
| Highest temperature | 56°F | ||||
| Lowest temperature | 43°F | ||||
| Highest record temperature | 70°F (2016) | ||||
| Lowest record temperature | 23°F (2010) | ||||
| Number of days at +65°F | 2 day(s) (7%) | ||||
| Number of days at -32°F | 3 day(s) (10%) | ||||
| Wind | |||||
| Wind speed | 18km/h | ||||
| Wind temperature | 40°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.8in | ||||
| Number of days with rainfall | 7 day(s) (24%) | ||||
| Record daily rainfall | 2.2in (2014) | ||||
| Snowfall | 12.3cm | ||||
| Other climate data | |||||
| Humidity | 91% | ||||
| Visibility | 8.52km | ||||
| Cloud cover | 59% | ||||
| UV index | 3 | ||||
| Daily sunshine hours | 9 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:51 | ||||
| Time of sunset | 19:39 | ||||
| Length of day | 12:48 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Katmai National Park in september 2024:
50°F to 58°F
50°F to 59°F
45°F to 63°F
52°F to 61°F
50°F to 52°F
49°F to 58°F
49°F to 56°F
49°F to 56°F
50°F to 59°F
50°F to 54°F
50°F to 52°F
49°F to 54°F
47°F to 56°F
47°F to 54°F
49°F to 52°F
49°F to 52°F
45°F to 50°F
45°F to 52°F
38°F to 50°F
36°F to 54°F
36°F to 49°F
41°F to 49°F
38°F to 45°F
38°F to 45°F
32°F to 43°F
32°F to 45°F
34°F to 50°F
41°F to 45°F
40°F to 45°F
38°F to 49°F
Map: other cities in Alaska in september
Cities near Katmai National Park:
| Kodiak in september | tolerable weather |
| Dillingham in september | tolerable weather |
| Lake Clark National Park in september | very bad weather |
| Anchor Point in september | bad weather |
| Port Heiden in september | bad weather |
| Kenai in september | bad weather |
| Goodnews Bay in september | bad weather |
| Anchorage in september | tolerable weather |
| Sand Point in september | bad weather |
| Denali National Park in september | very bad weather |
| Valdez in september | very bad weather |
| Cordova in september | very bad weather |
Click over cities on the map for information about the weather in september.
Katmai National Park
perfect weather
good
tolerable
bad
very bad
Weather data for Katmai National Park in september:
Weather data for Katmai National Park for september are derived from an average of the weather forecast since 2009 in Katmai National Park. There is a margin of error and these forecasts are to be considered as general information only. The weather in Katmai National Park can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Katmai National Park.