Chesterton
Indiana, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Chesterton, IN

September, the first month of the autumn, in Chesterton, is still a warm month, with average temperature ranging between min 53.8°F (12.1°C) and max 75°F (23.9°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 81.1°F (27.3°C) in August, to a still moderately hot 75°F (23.9°C). The average low-temperature, in Chesterton, is 53.8°F (12.1°C).

Rainfall

In Chesterton, in September, during 9 rainfall days, 3.2" (81mm) of precipitation is typically accumulated. Throughout the year, in Chesterton, there are 130 rainfall days, and 39.4" (999.8mm) of precipitation is accumulated.

Snowfall

In Chesterton, in September, it doesn't snow. In October, it regularly snows. Throughout the year, 48.6" (1234mm) of snow is accumulated.

Ocean temperature

In Chesterton, the average seawater temperature is 66.2°F (19°C). For swimming, a surface water temperature of 66.2°F (19°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

In Chesterton, the average length of the day is 12.5h.

Sunshine

The average sunshine in Chesterton is 8h.

UV index

In Chesterton, Indiana, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for average individuals.
The average daily UV index of 6 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Chesterton?

In Chesterton, in September, the average high-temperature is 75°F (23.9°C), and the average low-temperature is 53.8°F (12.1°C).

How many days does it rain in September in Chesterton?

In Chesterton, Indiana, during September, the rain falls for 9 days and regularly aggregates up to 3.2" (81mm) of precipitation.

Does it snow in Chesterton in September?

In Chesterton, Indiana, in September, it doesn't snow. In October, it regularly snows.

What is the ocean temperature in September in Chesterton?

In Chesterton, Indiana, the average seawater temperature in September is 66.2°F (19°C). For swimming, a surface water temperature of 66.2°F (19°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Chesterton?

In September, the average length of the day in Chesterton, Indiana, is 12.5h.

How many hours of sunshine does Chesterton have in September?

In September, the average sunshine is 8h.

What is the UV index reading in September in Chesterton?

In Chesterton, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
Average temperature in September - Chesterton, IN
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

Average rainfall in September - Chesterton, IN
  • Average rainfall in September: 3.2"

The wettest month (with the highest rainfall) is June (4.2").
The driest month (with the lowest rainfall) is February (1.7").

Average rainfall days in September - Chesterton, IN
  • Average rainfall days in September: 9 days

Months with the highest number of rainy days are March, April and December (13 days).
Months with the lowest number of rainy days are August, September and October (9 days).

Average snowfall in September - Chesterton, IN
  • Average snowfall in September: 0"

The month with the highest snowfall is January (11.8").
Months with the lowest snowfall are May, June, July, August and September (0").

Average sea temperature in September - Chesterton, IN
  • Average sea temperature in September: 66°F

The best month for swimming (with the highest average sea temperature) is August (70°F).
Coldest months (with the lowest average sea temperature) are February, March and April (37°F).

Average daylight in September / Average sunshine in September - Chesterton, IN
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8h

Months with most sunshine are June and July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 3h).

Average UV index in September - Chesterton, IN
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).