September weather forecast
Modoc, IL

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Weather in September

The first month of the autumn, September, is still a warm month in Modoc, Illinois, with an average temperature fluctuating between 80.2°F (26.8°C) and 59.9°F (15.5°C).

Temperature

September signals a slight drop in average high-temperature, sliding from August's tropical 86.5°F (30.3°C) to a warm 80.2°F (26.8°C). Throughout the month of September, Modoc witnesses an average temperature of 59.9°F (15.5°C).

Humidity

The average relative humidity in September is 74%.

Rainfall

February and September are months with the least rain when the rain falls for 11.8 days and typically aggregates up to 1.81" (46mm) of rain.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September in Modoc is 12h and 25min.
On the first day of September, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm CDT.

Sunshine

In Modoc, the average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index in Modoc is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: During September, 5 as the daily maximum UV index converts into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Updated: Jun 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Modoc?

In September, in Modoc, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 59.9°F (15.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is appraised at 98.6°F (37°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

What is the driest month?

The months with the least rainfall are February and September Rain falls for 11.8 days and accumulates 1.81" (46mm) of rain.

How many days does it rain in September?

In Modoc, in September, it is raining for 11.8 days, with typically 1.81" (46mm) of accumulated precipitation.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Modoc have in September?

In September, the average day length is 12h and 25min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm CDT.

How many hours of sunshine does Modoc have in September?

In Modoc, Illinois, the average sunshine duration in September is 9.2h.

How high is the UV index in September?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Modoc, IL

Average temperature in September - Modoc, IL
  • Average high temperature in September: 80.2°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

Average pressure in September
Modoc, IL

Average pressure in September - Modoc, IL
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Modoc, IL

Average wind speed in September - Modoc, IL
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in September
Modoc, IL

Average humidity in September - Modoc, IL
  • Average humidity in September: 74%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Modoc, IL

Average rainfall in September - Modoc, IL
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (3.86").
The driest months (with the least rainfall) are February and September (1.81").

Average rainfall days in September
Modoc, IL

Average rainfall days in September - Modoc, IL
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in September
Modoc, IL

Average snowfall in September - Modoc, IL
  • Average snowfall in September: 0"

The months with the highest snowfall are January and February (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Modoc, IL

Average snowfall days in September - Modoc, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Modoc, IL

Average daylight in September / Average sunshine in September - Modoc, IL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 9h and 1min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in September
Modoc, IL

Average sunshine days in September - Modoc, IL
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is July (12.3 days).

Average UV index in September
Modoc, IL

Average UV index in September - Modoc, IL
  • Average UV index in September: 5

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in September
Modoc, IL

Average cloud cover in September - Modoc, IL
  • Average cloud cover in September: 30

The months with the most cloud cover are January and February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 28).

Average visibility in September
Modoc, IL

Average visibility in September - Modoc, IL
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Modoc, Illinois, USA

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