Weather in Alton, United States
Weather Advisories
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Today's weather summary
The weather in Alton on Saturday, July 25th, is going to be clear for most of the day.
Also, there's a high chance of cloud overcast before dawn, at about 1 am.
Weather details for Alton, on Saturday, July 25th:
The highest temperature during the day will be 26°C at about 1 pm. The day will have high relative humidity, with average humidity of 63%, ranging from 46% to a maximum value of 96% at about midnight. The wind will be light, and will get up to 15 km/h at 4 pm, blowing from the east. The cloud coverage will range from 0% around 4 am to as high as 100% around 2 am with an average of 12%.
There is no probability for any precipitation throughout the day. The dew point will range from 10°C up to a maximum value of 15°C around midnight.
The visibility is expected to be good with average visibility of 16 km throughout the day. Atmospheric pressure will be high with average pressure of 1020 hPa. Sunrise will be at 5:34 am, and sunset at 8:11 pm. The day will have 14 hours and 37 minutes of daylight.
Air quality forecast for Alton, on Saturday, July 25th:
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 58.
Pollen forecast for Alton, on Saturday, July 25th:
The overall pollen forecast for this day shows no significant pollen. 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 no risk.
The weather in Alton on Sunday, July 26th, will be clear for most of the day.
There is also a chance of cloud overcast during the morning, at about 9 am.
Weather details for Alton, on Sunday, July 26th:
The highest temperature of the day will be 26°C at about 4 pm. The day will have high relative humidity, with average humidity of 63%, ranging from 30% to a maximum value of 89% at about 6 am. The wind will be light, and will get up to 13 km/h at noon, blowing from the north. The cloud coverage will range from 0% around midnight to as high as 100% around 11 am with an average of 13%.
There is no probability for any precipitation throughout the day. The dew point will range from 7°C up to a maximum value of 15°C around 8 pm.
The visibility is expected to be good with average visibility of 16 km throughout the day. Atmospheric pressure will be normal with average pressure of 1013 hPa. Sunrise will be at 5:35 am, and sunset at 8:10 pm. The day will have 14 hours and 35 minutes of daylight.
Air quality forecast for Alton, on Sunday, July 26th:
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 47 and 61.
Pollen forecast for Alton, on Sunday, July 26th:
The overall pollen forecast for this day shows no significant pollen. 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 no risk.
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