Weather in Alton, United States
Weather Advisories
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Today's weather summary
The weather in Alton on Friday, July 24th, is going to be cloudy for most of the day, with clear skies before dawn.
There's seems to be also high probability of few clouds before dawn at about 12 am.
Weather information for Alton, on Friday, July 24th:
The highest temperature during the day will be 29°C at about 2 pm. The day will be humid, with average humidity of 66%, ranging from 43% to a maximum value of 91% at about 5 am. The wind will be light, and will get up to 11 km/h at 4 pm, blowing from the south-west. The cloud coverage will range from 0% around 6 am to as high as 100% around 11 pm with an average of 76%.
There is no probability for any precipitation throughout the day. The dew point will range from 14°C up to a maximum value of 17°C around 9 pm.
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 1019 hPa. Sunrise will be at 5:54 am, and sunset at 8:19 pm. The day will have 14 hours and 25 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 32 and 63.
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 very low risk.
The weather in Alton on Saturday, July 25th, will be cloudy throughout the day, with clear skies during the evening.
There is also a chance for drizzle before dawn around 12 am, and few clouds in the early morning around 5 am.
Weather information for Alton, on Saturday, July 25th:
The maximum temperature during the day is going to be 31°C around 7 pm. The day will be extremely humid, with average humidity of 83%, ranging from 67% to a maximum value of 92% at about 6 am. The wind will be light, and will get up to 13 km/h at 10 am, blowing from the south. The cloud coverage will range from 0% around 8 pm to as high as 100% around 1 pm with an average of 57%.
The precipitation probability will change throughout the day between 0% and 25%. The highest chance for precipitation will be around 3 am and the lowest probability around 2 am. The dew point will range from 18°C up to a maximum value of 25°C around 8 pm.
The visibility is expected to be good with average visibility of 15 km throughout the day. Atmospheric pressure will be normal with average pressure of 1014 hPa. Sunrise will be at 5:55 am, and sunset at 8:18 pm. The day will have 14 hours and 23 minutes of daylight.
Air quality forecast for Alton, on Saturday, July 25th:
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 41 and 66.
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 very low risk.
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