Weather in Alton, United States
Weather Advisories
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Today's weather summary
The weather in Alton on Tuesday, May 14th, will be clear throughout the day.
Also, there's a high chance of cloud overcast during the evening, around 8 pm.
Weather information for Alton, on Tuesday, May 14th:
The highest temperature during the day will be 73°F around 6 pm. The day will have high relative humidity, with average humidity of 64%, ranging from 41% to a maximum value of 93% at about 3 am. The wind will be breezy, and will get up to 10 mph at 10 pm, blowing from the south-east. The cloud coverage will range from 0% around midnight to as high as 100% around 11 pm with an average of 13%.
There is no probability for any precipitation throughout the day. The dew point will range from 43°F up to a maximum value of 49°F around 10 am.
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 6:22 am, and sunset at 8:37 pm. The day will have 14 hours and 15 minutes of daylight.
Air quality forecast for Alton, on Tuesday, May 14th:
On average, the air quality on this day will be moderate, meaning that air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. According to our index, ranging from 0 to 500, the air quality is going to be between values of 45 and 65.
Pollen forecast for Alton, on Tuesday, May 14th:
Tree pollen on this day is expected to have very low 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 Wednesday, May 15th, will be cloudy for most of the day, with clear skies before dawn.
There's seems to be also high probability of some clouds in the early morning at about 6 am, and also light rain during the morning at about 10 am.
Weather information for Alton, on Wednesday, May 15th:
The maximum temperature during the day is going to be 66°F at about 3 pm. The day will have very high relative humidity, with average humidity of 79%, ranging from 65% to a maximum value of 94% at about 10 pm. The wind will be breezy, and will get up to 15 mph at 7 pm, blowing from the north-west. The cloud coverage will range from 0% around 2 am to as high as 100% around 5 pm with an average of 66%.
The chances of precipitation throughout the day will change between 0% and 35%. The highest chance for precipitation will be around noon and the lowest probability around midnight. The dew point will range from 46°F up to a maximum value of 57°F around 8 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 1010 hPa. Sunrise will be at 6:21 am, and sunset at 8:38 pm, making it a total of 14 hours and 17 minutes of daylight.
Air quality forecast for Alton, on Wednesday, May 15th:
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 25 and 44.
Pollen forecast for Alton, on Wednesday, May 15th:
Tree pollen on this day is expected to have very low 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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