Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Dawson in September witnesses an average high-temperature of a still warm 77.2°F (25.1°C), indicating a slight variation from August's 81.7°F (27.6°C). Throughout September, Dawson registers a consistent average low-temperature of 58.5°F (14.7°C).Humidity
In September, the average relative humidity in Dawson is 75%.Rainfall
In Dawson, in September, it is raining for 11.6 days, with typically 1.85" (47mm) of accumulated precipitation. In Dawson, Illinois, during the entire year, the rain falls for 131.5 days and collects up to 18.54" (471mm) of precipitation.Snowfall
May through October are months without snowfall in Dawson.Daylight
The average length of the day in September in Dawson, Illinois, is 12h and 26min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:28 pm. On the last day of September, in Dawson, Illinois, sunrise is at 6:53 am and sunset at 6:41 pm CDT.
Sunshine
In Dawson, the average sunshine in September is 9.3h.UV index
In Dawson, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Dawson?
What is the average humidity in September in Dawson?
How much does it rain in Dawson in September?
When it does not snow in Dawson?
What is the average length of the day in September in Dawson?
When are sunrise and sunset in September in Dawson?
How long on average sun shines in September in Dawson?
What is the UV index reading in September in Dawson?
Average temperature in September
Dawson, IL
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 58.5°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in September
Dawson, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Dawson, IL
- Average wind speed in September: 7.1mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Dawson, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Dawson, IL
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days in September
Dawson, IL
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Dawson, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Dawson, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dawson, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Dawson, IL
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in September
Dawson, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Dawson, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June, August and September (Cloud cover 30).
Average visibility in September
Dawson, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Dawson, Illinois, USA
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