United StatesAverage weather for Katmai National Park in September
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.
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. There are plenty of days with a good chance of precipitation.
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.
In September, there is an average of 215 mm of precipitation, spread over 18 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.
Katmai National Park in September |
New York | ||
|---|---|---|---|
 Average temperature |
13°C | 27°C | |
 Max. temperature |
15°C | 31°C | |
| Min. temperature |
10°C | -5°C | |
 Total precipitation |
215 mm | 57 mm | |
| Rainy days |
18 days | 9 days | |
 Total snowfall |
1,2 cm | 0 cm | |
| Snowy days |
1 day | 0 days | |
August
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.
Is September a good time to visit Katmai National Park?
Looking for sun? September isn’t a good month to be in Katmai National Park. There’s too much chance of rain this month.
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.
Check out the climate of Katmai National Park for all months and discover the best travel time
Daily Temperature in September in Katmai National Park
This chart shows the average daily high and low temperatures in September for Katmai National Park, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Katmai National Park
The chart below shows the average daily precipitation in September for Katmai National Park, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 18 days of precipitation in Katmai National Park.
Daily Snowfall in September in Katmai National Park
This chart shows the average daily snowfall in September in Katmai National Park, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
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.
Temperature in September in Katmai National Park over the years
This chart shows the average temperature in September in Katmai National Park, measured in degrees Celsius, over the past few years.
Total precipitation in September in Katmai National Park over the years
This chart shows the average precipitation in September in Katmai National Park, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in September in Katmai National Park per year
This chart shows the average snowfall in September in Katmai National Park, measured in centimeters, over the past few years.
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.
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.
Or check out the climate of Katmai National Park for all months at once
