Weather in Alton, United States
Weather Advisories
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Tomorrow's weather summary
The weather in Alton on Friday, July 24th, will be clear for most of the day.
There is also a chance of cloud overcast in the afternoon, around 3 pm.
Weather information for Alton, on Friday, July 24th:
The maximum temperature during the day is going to be 80°F at about 5 pm. The day will have comfortable humidity, with average humidity of 59%, ranging from 39% to a maximum value of 81% at about 11 pm. The wind will be light, and will get up to 10 mph at 3 pm, blowing from the south. The cloud coverage will range from 0% around 2 am to as high as 100% around 11 pm with an average of 38%.
The precipitation probability will change throughout the day between 0% and 45%. The highest chance for precipitation will be around 11 pm and the lowest probability around midnight. The dew point will range from 52°F up to a maximum value of 64°F around 11 pm.
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 1014 hPa. Sunrise will be at 6:21 am, and sunset at 9:36 pm, making it a total of 15 hours and 15 minutes of daylight.
Air quality forecast for Alton, on Friday, July 24th:
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 36 and 72.
Pollen forecast for Alton, on Friday, July 24th:
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 Saturday, July 25th, is going to be cloudy for most of the day, together with clear skies in the afternoon.
There's seems to be also high probability of drizzle in the early morning at about 5 am, and few clouds around noon around 2 pm.
Weather details for Alton, on Saturday, July 25th:
The maximum temperature during the day will be 77°F at about 6 pm. The day will have very high relative humidity, with average humidity of 81%, ranging from 63% to a maximum value of 92% at about 1 am. The wind will be breezy, and will get up to 13 mph at 2 am, blowing from the south-west. The cloud coverage will range from 2% around 11 pm to as high as 100% around 11 am with an average of 59%.
The chances of precipitation throughout the day will change between 0% and 60%. The highest chance for precipitation will be around 4 am and the lowest probability around midnight. The dew point will range from 60°F up to a maximum value of 69°F around 2 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 1009 hPa. Sunrise will be at 6:23 am, and sunset at 9:35 pm. The day will have 15 hours and 12 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 40 and 48.
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.
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