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Alton, Illinois
7 Day & Night Forecast & Conditions



Current Conditions Maps Radar 2 Radar 1 Satellite Alerts Climate Index
Current Alton, Illinois Weather: Mostly Cloudy
Mostly Cloudy
84°F
29°C
Heat Index: 89°F
Observed at: Alton/st Louis R, IL Elevation: 545 ft | 166 m
Last Updated: May 25, 2:47 PM Timezone: GMT -5
 
Sky Conditions: Mostly Cloudy Temperature: 84°F | 29°C
Pressure: 29.88 in | 1012 mb Dewpoint: 72°F | 22°C
Humidity: 66% Wind: SE 13 mph | SE 20 kph
Feels Like: 89°F | 31.7°C Visibility: 10.0 mi | 16.1 km
Today's QPF: 0.08 in | 2.08 mm Lat/Long: 38.89 | -90.18
Sunrise: 5:39 AM on 5/25/2020 Sunset: 8:14 PM on 5/25/2020

7 Day Graphical Forecast Valid: 7:00 AM 5/25/2020
Today
Today's Weather Forecast For Alton, Illinois is Scattered Storms
Scattered Storms
88 |69 °F
31 |21 °C
40% Chance
Precipitation
Tuesday
Tuesday's Weather Forecast For Alton, Illinois is Scattered Storms
Scattered Storms
85 |69 °F
29 |20 °C
40% Chance
Precipitation
Wednesday
Wednesday's Weather Forecast For Alton, Illinois is Scattered Storms
Scattered Storms
82 |69 °F
28 |21 °C
60% Chance
Precipitation
Thursday
Thursday's Weather Forecast For Alton, Illinois is Showers
Showers
81 |66 °F
27 |19 °C
88% Chance
Precipitation
Friday
Friday's Weather Forecast For Alton, Illinois is Scattered Storms
Scattered Storms
78 |59 °F
26 |15 °C
40% Chance
Precipitation
Saturday
Saturday's Weather Forecast For Alton, Illinois is Mostly Sunny
Mostly Sunny
76 |59 °F
24 |15 °C
0% Chance
Precipitation
Sunday
Sunday's Weather Forecast For Alton, Illinois is Mostly Sunny
Mostly Sunny
78 |55 °F
26 |13 °C
0% Chance
Precipitation

7 Hour Graphical Forecast Valid: 7:00 AM 5/25/2020
3 PM
3PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
88 °F
40% Chance
Precipitation
4 PM
4PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
87 °F
40% Chance
Precipitation
5 PM
5PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
86 °F
40% Chance
Precipitation
6 PM
6PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
85 °F
40% Chance
Precipitation
7 PM
7PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
82 °F
40% Chance
Precipitation
8 PM
8PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
79 °F
40% Chance
Precipitation
9 PM
9PMweather forecast forAlton, Illinois is Scattered Storms
Scattered Storms
77 °F
40% Chance
Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall, & Ice Accumulation Forecasts
7 Day & Night Weather Forecast for Alton, IL - ( Fahrenheit & Celsius)
Valid: 7:00 AM 5/25/2020
Today
Scattered Storms Partly Cloudy with Scattered Storms with a high near 88°F [31°C]. Southeast wind to around 6 mph [9 kph], with wind gusts to near 17 mph [28 kph]. The dewpoint will be near 67,°F [21°C] with a humidity of 93% and a barometric pressure around 29.91 in [1013 mb]. The UVI forecast is 10. Chance of precipitation is 40% with a qpf of 0.08 in [2.08 mm].
Tonight
Scattered Storms Partly Cloudy with Scattered Storms with a low around 69°F [21°C]. Southeast wind to around 9 mph [14 kph], with wind gusts to near 14 mph [23 kph]. The dewpoint will be near 68,°F [20°C] with a humidity of 63% and a barometric pressure around 29.89 in [1012 mb]. Chance of precipitation is 40% with a qpf of 0.07 in [1.9 mm].
Tuesday
Scattered Storms Partly Cloudy with Scattered Storms with a high near 85°F [29°C]. Southeast wind to around 8 mph [12 kph], with wind gusts to near 20 mph [32 kph]. The dewpoint will be near 67,°F [21°C] with a humidity of 84% and a barometric pressure around 29.91 in [1013 mb]. The UVI forecast is 8. Chance of precipitation is 40% with a qpf of 0.05 in [1.2 mm].
Tuesday Night
Isolated Storms Partly Cloudy with Isolated Storms with a low around 69°F [20°C]. South southeast wind to around 11 mph [18 kph], with wind gusts to near 13 mph [21 kph]. The dewpoint will be near 67,°F [20°C] with a humidity of 65% and a barometric pressure around 29.90 in [1012 mb]. Chance of precipitation is 20% with a qpf of 0.01 in [0.24 mm].
Wednesday
Scattered Storms Partly Cloudy with Thunderstorms Likely with a high near 82°F [28°C]. Southeast wind to around 7 mph [11 kph], with wind gusts to near 13 mph [21 kph]. The dewpoint will be near 67,°F [20°C] with a humidity of 91% and a barometric pressure around 29.90 in [1013 mb]. The UVI forecast is 6. Chance of precipitation is 60% with a qpf of 0.02 in [0.58 mm].
Wednesday Night
Scattered Storms Mostly Cloudy with Scattered Storms with a low around 69°F [21°C]. South southeast wind to around 7 mph [11 kph], with wind gusts to near 9 mph [14 kph]. The dewpoint will be near 68,°F [20°C] with a humidity of 70% and a barometric pressure around 29.85 in [1011 mb]. Chance of precipitation is 30% with a qpf of 0.00 in [0.11 mm].
Thursday
Showers Mostly Cloudy with Showers with a high near 81°F [27°C]. Southeast wind to around 4 mph [7 kph], with wind gusts to near 8 mph [13 kph]. The dewpoint will be near 68,°F [20°C] with a humidity of 94% and a barometric pressure around 29.85 in [1011 mb]. The UVI forecast is 9. Chance of precipitation is 88% with a qpf of 0.23 in [5.72 mm].
Thursday Night
Scattered Storms Mostly Cloudy with Scattered Storms with a low around 66°F [19°C]. "NNE" wind to around 5 mph [7 kph], with wind gusts to near 10 mph [15 kph]. The dewpoint will be near 67,°F [20°C] with a humidity of 74% and a barometric pressure around 29.87 in [1011 mb]. Chance of precipitation is 40% with a qpf of 0.06 in [1.62 mm].
Friday
Scattered Storms Partly Cloudy with Scattered Storms with a high near 78°F [26°C]. North wind to around 9 mph [14 kph], with wind gusts to near 14 mph [23 kph]. The dewpoint will be near 65,°F [18°C] with a humidity of 92% and a barometric pressure around 29.97 in [1015 mb]. The UVI forecast is 4. Chance of precipitation is 40% with a qpf of 0.02 in [0.42 mm].
Friday Night
Partly Cloudy Partly Cloudy with a low around 59°F [15°C]. North wind to around 9 mph [14 kph], with wind gusts to near 14 mph [23 kph]. The dewpoint will be near 60,°F [16°C] with a humidity of 61% and a barometric pressure around 30.11 in [1020 mb]. Chance of precipitation is 0% with a qpf of 0.00 in [0.00 mm].
Saturday
Mostly Sunny Mostly Sunny with a high near 76°F [24°C]. "NNE" wind to around 8 mph [14 kph], with wind gusts to near 13 mph [21 kph]. The dewpoint will be near 54,°F [14°C] with a humidity of 82% and a barometric pressure around 30.17 in [1022 mb]. The UVI forecast is 0. Chance of precipitation is 0% with a qpf of 0.00 in [0.00 mm].
Saturday Night
Mostly Clear Mostly Clear with a low around 59°F [15°C]. "NNE" wind to around 9 mph [14 kph], with wind gusts to near 11 mph [17 kph]. The dewpoint will be near 57,°F [14°C] with a humidity of 56% and a barometric pressure around 30.20 in [1023 mb]. Chance of precipitation is 0% with a qpf of 0.00 in [0.00 mm].
Sunday
Mostly Sunny Mostly Sunny with a high near 78°F [26°C]. Northeast wind to around 7 mph [11 kph], with wind gusts to near 10 mph [17 kph]. The dewpoint will be near 55,°F [14°C] with a humidity of 82% and a barometric pressure around 30.23 in [1024 mb]. The UVI forecast is null. Chance of precipitation is 0% with a qpf of 0.00 in [0.00 mm].
Sunday Night
Mostly Clear Mostly Clear with a low around 55°F [13°C]. East wind to around 7 mph [12 kph], with wind gusts to near 8 mph [13 kph]. The dewpoint will be near 58,°F [15°C] with a humidity of 54% and a barometric pressure around 30.21 in [1023 mb]. Chance of precipitation is 0% with a qpf of 0.00 in [0.00 mm].



QPF - Max Wind Speed - Max Humidity - Snowfall - Ice Accumulation
  7 Day and Night - QPF Forecast for Alton, IL
Today: 2.08 mm | 0.08 in
Tonight: 1.9 mm | 0.07 in
Tuesday: 1.2 mm | 0.05 in
Tuesday Night: 0.24 mm | 0.01 in
Wednesday: 0.58 mm | 0.02 in
Wednesday Night: 0.11 mm | 0.00 in
Thursday: 5.72 mm | 0.23 in
Thursday Night: 1.62 mm | 0.06 in
Friday: 0.42 mm | 0.02 in
Friday Night: 0.00 mm | 0.00 in
Saturday: 0.00 mm | 0.00 in
Saturday Night: 0.00 mm | 0.00 in
Sunday: 0.00 mm | 0.00 in
Sunday Night: 0.00 mm | 0.00 in

  7 Day and Night - Maximum Wind Speed Forecast for Alton, IL
Today: SE @ 28 kph | 17 mph
Tonight: SE @ 23 kph | 14 mph
Tuesday: SE @ 32 kph | 20 mph
Tuesday Night: SSE @ 20 kph | 13 mph
Wednesday: SE @ 21 kph | 13 mph
Wednesday Night: SSE @ 14 kph | 9 mph
Thursday: SE @ 13 kph | 8 mph
Thursday Night: NNE @ 15 kph | 10 mph
Friday: N @ 23 kph | 14 mph
Friday Night: N @ 23 kph | 14 mph
Saturday: NNE @ 21 kph | 13 mph
Saturday Night: NNE @ 17 kph | 11 mph
Sunday: NE @ 17 kph | 10 mph
Sunday Night: E @ 13 kph | 8 mph

  7 Day and Night - Maximum Humidity Forecast for Alton, IL
Today: 93 %
Tonight: 92 %
Tuesday: 84 %
Tuesday Night: 90 %
Wednesday: 91 %
Wednesday Night: 93 %
Thursday: 94 %
Thursday Night: 92 %
Friday: 92 %
Friday Night: 81 %
Saturday: 82 %
Saturday Night: 81 %
Sunday: 82 %
Sunday Night: 77 %

  7 Day and Night - Snowfall Totals Forecast for Alton, IL
Today: 0.00 cm | 0.00 in
Tonight: 0.00 cm | 0.00 in
Tuesday: 0.00 cm | 0.00 in
Tuesday Night: 0.00 cm | 0.00 in
Wednesday: 0.00 cm | 0.00 in
Wednesday Night: 0.00 cm | 0.00 in
Thursday: 0.00 cm | 0.00 in
Thursday Night: 0.00 cm | 0.00 in
Friday: 0.00 cm | 0.00 in
Friday Night: 0.00 cm | 0.00 in
Saturday: 0.00 cm | 0.00 in
Saturday Night: 0.00 cm | 0.00 in
Sunday: 0.00 cm | 0.00 in
Sunday Night: 0.00 cm | 0.00 in

  7 Day and Night - Ice Accumulation Forecast for Alton, IL
Today: 0.00 mm | 0.00 in
Tonight: 0.00 mm | 0.00 in
Tuesday: 0.00 mm | 0.00 in
Tuesday Night: 0.00 mm | 0.00 in
Wednesday: 0.00 mm | 0.00 in
Wednesday Night: 0.00 mm | 0.00 in
Thursday: 0.00 mm | 0.00 in
Thursday Night: 0.00 mm | 0.00 in
Friday: 0.00 mm | 0.00 in
Friday Night: 0.00 mm | 0.00 in
Saturday: 0.00 mm | 0.00 in
Saturday Night: 0.00 mm | 0.00 in
Sunday: 0.00 mm | 0.00 in
Sunday Night: 0.00 mm | 0.00 in
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