Weather Alert
Summum Weather Warning NWS WEATHER ALERT FOR THE SUMMUM, IL AREA - Issued: 238 PM CDT Fri Sep 18 2026 Summum Weather Warning

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Summum, IL Weather - Hour by Hour Forecast

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Summum, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 72°F22°C, dew point 72°F22°C, humidity 100%. Wind direction is SSE at 8 mph13 km/h with visibility of 10 mi16 km. Barometric pressure is 29.98 in1015 mb.
Tonight - Partly cloudy this evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper.. Full Forecast
Saturday - Mostly cloudy. A slight chance of showers in the morning. Humid with highs in the upper 80s. South winds 5 to 10 mph. Chance of ra.. Full Forecast

Summum Hourly Weather

24 Hour Forecast Scroll
Sat, Sep 19
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Midnight
Summum, IL Hourly Weather - Cloudy - 1:00 AM Summum, IL Hourly Weather - Cloudy - 2:00 AM Summum, IL Hourly Weather - Mostly Cloudy - 3:00 AM Summum, IL Hourly Weather - Mostly Cloudy - 4:00 AM Summum, IL Hourly Weather - Mostly Cloudy - 5:00 AM Summum, IL Hourly Weather - Cloudy - 6:00 AM Summum, IL Hourly Weather - Cloudy - 7:00 AM Summum, IL Hourly Weather - Cloudy - 8:00 AM Summum, IL Hourly Weather - Cloudy - 9:00 AM Summum, IL Hourly Weather - Cloudy - 10:00 AM Summum, IL Hourly Weather - Cloudy - 11:00 AM Summum, IL Hourly Weather - Cloudy - 12:00 PM Summum, IL Hourly Weather - Cloudy - 1:00 PM Summum, IL Hourly Weather - Cloudy - 2:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 3:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 4:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 5:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 6:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 7:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 8:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 9:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 10:00 PM Summum, IL Hourly Weather - Mostly Cloudy - 11:00 PM Summum, IL Hourly Weather - Cloudy - 12:00 AM
Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Cloudy
69°F21°C 69°F21°C 68°F20°C 68°F20°C 67°F19°C 67°F19°C 66°F19°C 68°F20°C 71°F22°C 73°F23°C 75°F24°C 77°F25°C 79°F26°C 79°F26°C 80°F27°C 80°F27°C 78°F26°C 77°F25°C 75°F24°C 74°F23°C 72°F22°C 71°F22°C 71°F22°C 70°F21°C
Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain - - - - - - Rain Rain Rain Rain Rain
52% 52% 52% 52% 52% 52% 52% 42% 42% 42% 42% 42% 42% 7% 7% 7% 7% 7% 7% 29% 29% 29% 29% 29%
69°F21°C 69°F21°C 68°F20°C 68°F20°C 67°F19°C 67°F19°C 66°F19°C 67°F19°C 68°F20°C 69°F21°C 68°F20°C 68°F20°C 67°F19°C 67°F19°C 66°F19°C 66°F19°C 66°F19°C 67°F19°C 67°F19°C 67°F19°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C
100% 100% 100% 100% 100% 100% 100% 97% 90% 87% 79% 74% 67% 67% 62% 62% 67% 71% 76% 79% 87% 90% 90% 93%
SE SE SE SE SE E ENE E E E ESE SE SSE SSE SSE S S SSE SSE SSE SSE SSE S SW
4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 3 mph 3 mph 3 mph 6 mph 6 mph 6 mph 6 mph 6 mph 6 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 5 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 6 mi10 km 6 mi10 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km
Hour (CDT)
Weather
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POP
Dewpoint
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POP = Probability of Precipitation. ** Indicates missing data/values from KMQB model statistics.

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Prob Precip % = Probability of Precipitation.

Summum 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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