St. Louis Regional Airport Alton, IL Weather

    05:00 Thursday
    Overcast
    Overcast
    11° Feels like 11°
    Strong south wind South 28 - 51 km/h
    • Today 18 Dec. Moderate rain with partly cloudy skies 90% 9.8 mm 14° / -5° Strong south wind 31 - 64 km/h
    • Tomorrow 19 Dec. Scattered clouds 2° / -6° Strong west wind 25 - 50 km/h
    • Saturday 20 Dec. Scattered clouds 13° / 0° Moderate south wind 20 - 35 km/h
    • Sunday 21 Dec. Scattered clouds 4° / -3° Moderate southeast wind 10 - 20 km/h
    • Monday 22 Dec. Scattered clouds 8° / -3° Moderate south wind 17 - 30 km/h
    • Tuesday 23 Dec. Fog More information 17° / 6° Moderate southwest wind 16 - 34 km/h
    • Wednesday 24 Dec. Light rain with cloudy skies 30% 1 mm 12° / 6° Moderate east wind 14 - 29 km/h

    Weather Forecast for St. Louis Regional Airport Alton, IL Today

    , 18 December

    Tomorrow

    , 19 December
    05:00 Overcast 11° Overcast
    Feels Like 11°
    Strong south wind South 28 - 51 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 10 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 11 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 28 km/h
    • Pressure Pressure 1004 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 51 km/h
    • Snowline Snowline 10171 ft
    06:00 Overcast 11° Overcast
    Feels Like 11°
    Strong south wind South 26 - 50 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 95%
    • Dew Point Dew Point 10 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 11 °C
    • Visibility Visibility 16 km
    • Wind Wind - Average 26 km/h
    • Pressure Pressure 1003 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 50 km/h
    • Snowline Snowline 10171 ft
    07:00 Overcast 11° Overcast
    Feels Like 11°
    Moderate south wind South 25 - 46 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 11 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 11 °C
    • Visibility Visibility 14 km
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1002 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 46 km/h
    • Snowline Snowline 9843 ft
    Light rain 08:00 Light rain with cloudy skies 60% 0.016 mm 11° Light rain
    Feels Like 11°
    Moderate south wind South 25 - 45 km/h
    		UV Index 0 Low SPF: no
    08:00 Light rain with cloudy skies 70% 1.5 mm 11° Light rain
    Feels Like 11°
    Moderate south wind South 25 - 45 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 60% 0.016 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 11 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 11 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1001 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 45 km/h
    • Snowline Snowline 9186 ft
    09:00 Light rain with cloudy skies 70% 0.043 mm 12° Light rain
    Feels Like 12°
    Strong south wind South 27 - 52 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.043 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 11 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 12 °C
    • Visibility Visibility 10 km
    • Wind Wind - Average 27 km/h
    • Pressure Pressure 1000 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 52 km/h
    • Snowline Snowline 8858 ft
    10:00 Partly cloudy 13° Partly cloudy
    Feels Like 13°
    Strong south wind South 30 - 54 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 96%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 18 km
    • Wind Wind - Average 30 km/h
    • Pressure Pressure 999 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 54 km/h
    • Snowline Snowline 9186 ft
    Light rain 11:00 Light rain with cloudy skies 90% 0.012 mm 13° Light rain
    Feels Like 13°
    Strong south wind South 31 - 62 km/h
    		UV Index 1 Low SPF: no
    11:00 Moderate rain with cloudy skies 90% 6 mm 13° Moderate rain
    Feels Like 13°
    Strong south wind South 31 - 62 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 90% 0.012 mm
    • Humidity Humidity 92%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 3 km
    • Wind Wind - Average 31 km/h
    • Pressure Pressure 998 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 62 km/h
    • Snowline Snowline 8530 ft
    12:00 Moderate rain with cloudy skies 90% 0.224 mm 12° Moderate rain
    Feels Like 12°
    Strong southwest wind Southwest 26 - 63 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 90% 0.224 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 12 °C
    • Visibility Visibility 2 km
    • Wind Wind - Average 26 km/h
    • Pressure Pressure 998 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 63 km/h
    • Snowline Snowline 7546 ft
    13:00 Light rain with cloudy skies 90% 0.079 mm 7° Light rain
    Feels Like 3°
    Strong northwest wind Northwest 26 - 55 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 90% 0.079 mm
    • Humidity Humidity 92%
    • Dew Point Dew Point 6 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 3 °C
    • Visibility Visibility 9 km
    • Wind Wind - Average 26 km/h
    • Pressure Pressure 1000 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 55 km/h
    • Snowline Snowline 6890 ft
    Overcast 14:00 Overcast 6° Overcast
    Feels Like 4°
    Moderate northwest wind Northwest 17 - 47 km/h
    		UV Index 1 Low SPF: no
    14:00 Light rain with cloudy skies 90% 2 mm 6° Light rain
    Feels Like 4°
    Moderate northwest wind Northwest 17 - 47 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 81%
    • Dew Point Dew Point 3 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 4 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 17 km/h
    • Pressure Pressure 1001 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 47 km/h
    • Snowline Snowline 5249 ft
    15:00 Partly cloudy 7° Partly cloudy
    Feels Like 5°
    Moderate west wind West 10 - 30 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 76%
    • Dew Point Dew Point 3 °C
    • Clouds Clouds 56%
    • Feels Like Feels Like 5 °C
    • Visibility Visibility 40 km
    • Wind Wind - Average 10 km/h
    • Pressure Pressure 1001 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 30 km/h
    • Snowline Snowline 4593 ft
    16:00 Clear 7° Sunny
    Feels Like 5°
    Moderate southwest wind Southwest 11 - 20 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 75%
    • Dew Point Dew Point 3 °C
    • Clouds Clouds 9%
    • Feels Like Feels Like 5 °C
    • Visibility Visibility 40 km
    • Wind Wind - Average 11 km/h
    • Pressure Pressure 1001 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 20 km/h
    • Snowline Snowline 4593 ft
    Sunny 17:00 Clear 5° Sunny
    Feels Like 3°
    Moderate southwest wind Southwest 10 - 20 km/h
    		UV Index 0 Low SPF: no
    17:00 Scattered clouds 5° Scattered clouds
    Feels Like 3°
    Moderate southwest wind Southwest 10 - 20 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 2 °C
    • Clouds Clouds 2%
    • Feels Like Feels Like 3 °C
    • Visibility Visibility 40 km
    • Wind Wind - Average 10 km/h
    • Pressure Pressure 1001 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 20 km/h
    • Snowline Snowline 4593 ft
    18:00 Scattered clouds 5° Scattered clouds
    Feels Like 2°
    Moderate west wind West 17 - 26 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 76%
    • Dew Point Dew Point 1 °C
    • Clouds Clouds 14%
    • Feels Like Feels Like 2 °C
    • Visibility Visibility 40 km
    • Wind Wind - Average 17 km/h
    • Pressure Pressure 1001 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 26 km/h
    • Snowline Snowline 4265 ft
    19:00 Clear skies 4° Clear
    Feels Like -1°
    Strong northwest wind Northwest 29 - 57 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 41%
    • Dew Point Dew Point -8 °C
    • Clouds Clouds 5%
    • Feels Like Feels Like -1 °C
    • Visibility Visibility 45 km
    • Wind Wind - Average 29 km/h
    • Pressure Pressure 1004 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 57 km/h
    • Snowline Snowline 1969 ft
    Clear 20:00 Clear skies 1° Clear
    Feels Like -4°
    Strong northwest wind Northwest 26 - 53 km/h
    		UV Index 0 Low SPF: no
    20:00 Clear skies 1° Clear
    Feels Like -4°
    Strong northwest wind Northwest 26 - 53 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 45%
    • Dew Point Dew Point -10 °C
    • Clouds Clouds 0%
    • Feels Like Feels Like -4 °C
    • Visibility Visibility 45 km
    • Wind Wind - Average 26 km/h
    • Pressure Pressure 1006 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 53 km/h
    • Snowline Snowline 984 ft
    21:00 Clear skies 0° Clear
    Feels Like -6°
    Strong west wind West 28 - 50 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 48%
    • Dew Point Dew Point -10 °C
    • Clouds Clouds 2%
    • Feels Like Feels Like -6 °C
    • Visibility Visibility 45 km
    • Wind Wind - Average 28 km/h
    • Pressure Pressure 1007 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 50 km/h
    • Snowline Snowline 328 ft
    22:00 Clear skies -2° Clear
    Feels Like -9°
    Strong west wind West 25 - 53 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 49%
    • Dew Point Dew Point -12 °C
    • Clouds Clouds 1%
    • Feels Like Feels Like -9 °C
    • Visibility Visibility 45 km
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1009 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 53 km/h
    • Snowline Snowline 0 ft
    Clear 23:00 Clear skies -4° Clear
    Feels Like -11°
    Strong west wind West 27 - 52 km/h
    		UV Index 0 Low SPF: no
    23:00 Clear skies -4° Clear
    Feels Like -11°
    Strong west wind West 27 - 52 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 49%
    • Dew Point Dew Point -13 °C
    • Clouds Clouds 1%
    • Feels Like Feels Like -11 °C
    • Visibility Visibility 45 km
    • Wind Wind - Average 27 km/h
    • Pressure Pressure 1010 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 52 km/h
    • Snowline Snowline 0 ft
    24:00 Clear skies -5° Clear
    Feels Like -12°
    Strong west wind West 27 - 51 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 50%
    • Dew Point Dew Point -13 °C
    • Clouds Clouds 9%
    • Feels Like Feels Like -12 °C
    • Visibility Visibility 45 km
    • Wind Wind - Average 27 km/h
    • Pressure Pressure 1010 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 51 km/h
    • Snowline Snowline 0 ft

    Sunrise and Sunset

    Sunrise 07:13 Sunset 16:40
    First light 06:43 Midday 11:57 Last light 17:10
    Day length 9h 27m

    Time remaining until sunrise 2h 1m

    Lunar calendar

    Mon Tue Wed Thu Fri Sat Sun
    18 New Moon
    19 New Moon
    20 New Moon
    21 New Moon
    22 First Quarter
    23 First Quarter
    24 First Quarter
    25 First Quarter
    26 First Quarter
    27 First Quarter
    28 First Quarter
    29 First Quarter
    30 First Quarter
    31 First Quarter

    Air quality in St. Louis Regional Airport Alton today

    Detail
    27
    Fair O₃ (67 µg/m³)
    • Little health risk.
    • Sensitive people should consider reducing prolonged or intense outdoor activities if they experience symptoms.

    Weather graphs
    Maximum Minimum Rainfall

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