Weather in Alton, United States
Weather Advisories
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Tomorrow's weather summary
The weather in Alton on Monday, July 20th, will be clear throughout the day, with cloud overcast before dawn.
There is also a chance for few clouds during the evening at about 6 pm.
Weather information for Alton, on Monday, July 20th:
The maximum temperature during the day will be 83°F around 4 pm. The day will have comfortable humidity, with average humidity of 57%, ranging from 31% to a maximum value of 75% at about 7 am. The wind will be breezy, and will get up to 16 mph at 5 pm, blowing from the south-west. The cloud coverage will range from 0% around 10 am to as high as 100% around 5 pm with an average of 39%.
There is no probability for any precipitation throughout the day. The dew point will range from 47°F up to a maximum value of 59°F around noon.
The visibility is expected to be good with average visibility of 10 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1009 hPa. Sunrise will be at 6:24 am, and sunset at 8:47 pm, making it a total of 14 hours and 23 minutes of daylight.
Air quality forecast for Alton, on Monday, July 20th:
On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 22 and 50.
Pollen forecast for Alton, on Monday, July 20th:
Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have medium risk.
The weather in Alton on Tuesday, July 21st, will vary throughout the day from raining lightly condition to clear.
Looks like light rain will appear around noon and there is a high chance for clear skies before dawn.
Weather information for Alton, on Tuesday, July 21st:
The maximum temperature during the day is going to be 84°F at about noon. The day will have comfortable humidity, with average humidity of 59%, ranging from 30% to a maximum value of 85% at about 11 pm. The wind will be light, and will get up to 8 mph at 7 pm, blowing from the south-west. The cloud coverage will range from 0% around 3 am to as high as 76% around 1 pm with an average of 27%.
The precipitation probability will change throughout the day between 0% and 35%. The highest chance for precipitation will be around 4 pm and the lowest probability around midnight. The dew point will range from 46°F up to a maximum value of 56°F around 10 pm.
The visibility is expected to be good with average visibility of 9 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1015 hPa. Sunrise will be at 6:25 am, and sunset at 8:47 pm, making it a total of 14 hours and 22 minutes of daylight.
Air quality forecast for Alton, on Tuesday, July 21st:
On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 28 and 50.
Pollen forecast for Alton, on Tuesday, July 21st:
Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have medium risk.
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