United StatesThe weather in September in Katmai National Park
It's cool in September in Katmai National Park with an average temperature of 13°C. Temperatures this month range from a low of 10°C to a high of 15°C. At night, you can expect temperatures between 3°C and 9°C.
Looking for sun? September isn’t a good month to be in Katmai National Park. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Katmai National Park, Alaska. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 20°C in 2018, Katmai National Park reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 2°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of -5°C to a highest value of 13°C.
Precipitation and snowfall
In September, there is an average of 215 mm of precipitation, spread over 23 days. Of the total precipitation, about 1,2 cm falls as snow in September. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in September for Katmai National Park
Click on any day in September to get detailed info about the usual weather on that day in Katmai National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Katmai National Park | New York | |
|---|---|---|
| Average temperature | 13°C | 27°C |
| Max. temperature | 15°C | 31°C |
| Min. temperature | 3°C | -5°C |
| Total precipitation | 215 mm | 57 mm |
| Rainy days | 23 days | 9 days |
| Total snowfall | 1,2 cm | 0 cm |
| Snowy days | 1 day | 0 days |
Start of September
The month of September starts in Katmai National Park with cool temps, averaging around 15°C during the day and nights around 9°C.
Mid September
By mid-September, daytime temps drop to around 14°C, with nights around 8°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in Katmai National Park is around 12°C, while nighttime temps are about 6°C. There’s a significant chance of many days with precipitation.
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Katmai National Park for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Katmai National Park, Alaska. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Katmai National Park
Temperature in September in Katmai National Park over the years
Precipitation charts
These charts show the average amount of precipitation in September in Katmai National Park, Alaska. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Katmai National Park
Total precipitation in September in Katmai National Park over the years
Daily Snowfall in September in Katmai National Park
Snowfall in September in Katmai National Park per year
Daily UV index in September in Katmai National Park
This chart shows the average daily UV index in September in Katmai National Park, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Katmai National Park
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Average weather in Katmai National Park by month
Click on a month below to see detailed weather info for Katmai National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.