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
As Watson transitions into September, the average high-temperature stands at a still moderately hot 77.4°F (25.2°C), offering little variation from the preceding month. During September, Watson witnesses a consistent average low-temperature of 59.4°F (15.2°C).Humidity
The average relative humidity in September is 75%.Rainfall
In Watson, during September, the rain falls for 11.3 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, in Watson, there are 135.9 rainfall days, and 21.89" (556mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Watson is 12h and 26min.On the first day of September, sunrise is at 6:23 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:38 pm CDT.
Sunshine
In Watson, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index in Watson is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the average September temperature in Watson?
What is the average humidity in September in Watson?
How much does it rain in Watson in September?
When it does not snow in Watson?
What is the average length of the day in September in Watson?
What time are sunrise and sunset in September in Watson?
How long on average sun shines in September in Watson?
How high is the UV index in September in Watson?
Average temperature in September
Watson, IL
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in September
Watson, IL
- Average pressure in September: 30.03"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
Watson, IL
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in September
Watson, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Watson, IL
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in September
Watson, IL
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in September
Watson, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Watson, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 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
Watson, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Watson, IL
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in September
Watson, 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
Watson, IL
- Average cloud cover in September: 29
The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in September
Watson, 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).
Watson, Illinois, USA
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