Port Byron, Illinois | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Saturday
    70% Chance of Storms
    77°
    Forecast night icon
    Night
    50% Chance of Storms
    49°
    Saturday 5/4
    Day
    77°
    70% Chance of Storms
    Forecast day icon
    Night
    49°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Showers likely with a chance of thunderstorms this afternoon. Highs in the upper 70s. Southeast winds 10 to 15 mph becoming southwest this afternoon. Chance of rain 70 percent.
    Night Details
    Mostly cloudy with a chance of showers and thunderstorms in the evening then partly cloudy after midnight. Lows in the upper 40s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.
  • Forecast day icon
    Sunday
    Mostly Sunny
    68°
    Forecast night icon
    Night
    Partly Cloudy
    53°
    Sunday 5/5
    Day
    68°
    Mostly Sunny
    Forecast day icon
    Night
    53°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs around 70. North winds 5 to 10 mph becoming northeast in the afternoon.
    Night Details
    Partly cloudy in the evening then clearing. Lows around 50. East winds 5 to 10 mph.
  • Forecast day icon
    Monday
    Partly Sunny
    71°
    Forecast night icon
    Night
    Thunderstorms
    61°
    Monday 5/6
    Day
    71°
    Partly Sunny
    Forecast day icon
    Night
    61°
    Thunderstorms
    Forecast night icon
    Hourly
    Day Details
    Sunny in the morning then becoming partly sunny. Highs in the mid 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph.
    Night Details
    Mostly cloudy. A chance of showers in the evening then showers with a chance of thunderstorms after midnight. Not as cool with lows in the lower 60s. Chance of rain 90 percent.
  • Forecast day icon
    Tuesday
    70% Chance of Storms
    73°
    Forecast night icon
    Night
    50% Chance of Storms
    54°
    Tuesday 5/7
    Day
    73°
    70% Chance of Storms
    Forecast day icon
    Night
    54°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny in the morning then clearing. A chance of thunderstorms. Showers likely mainly in the morning. Highs in the upper 70s. Chance of rain 70 percent.
    Night Details
    Mostly clear. A chance of showers and thunderstorms in the evening. Lows in the mid 50s. Chance of rain 50 percent.
  • Forecast day icon
    Wednesday
    60% Chance of Storms
    75°
    Forecast night icon
    Night
    40% Chance of Storms
    57°
    Wednesday 5/8
    Day
    75°
    60% Chance of Storms
    Forecast day icon
    Night
    57°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A chance of showers in the morning then showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 60 percent.
    Night Details
    Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 50s. Chance of rain 40 percent.
  • Forecast day icon
    Thursday
    30% Chance Rain Showers
    64°
    Forecast night icon
    Night
    Partly Cloudy
    50°
    Thursday 5/9
    Day
    64°
    30% Chance Rain Showers
    Forecast day icon
    Night
    50°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 30 percent.
    Night Details
    Partly cloudy. Lows in the lower 50s.
  • Forecast day icon
    Friday
    30% Chance Rain Showers
    66°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Friday 5/10
    Day
    66°
    30% Chance Rain Showers
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Day Details
    Mostly sunny. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 30 percent.
    Night Details
    Partly cloudy. Low temperature around 48F. Dew point will be around 41F with an average humidity of 60%. Winds will be 9 mph from the NW.
  • Forecast day icon
    Saturday
    Sunny
    65°
    Forecast night icon
    Night
    30% Chance of Rain
    51°
    Saturday 5/11
    Day
    65°
    Sunny
    Forecast day icon
    Night
    51°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny. High temperature around 65F. Dew point will be around 40F with an average humidity of 51%. Winds will be 8 mph from the NW.
    Night Details
    Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 51F. Dew point will be around 44F with an average humidity of 61%. Winds will be 6 mph from the W.
  • Forecast day icon
    Sunday
    Sunny
    70°
    Forecast night icon
    Night
    Clear
    55°
    Sunday 5/12
    Day
    70°
    Sunny
    Forecast day icon
    Night
    55°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 70F. Dew point will be around 46F with an average humidity of 56%. Winds will be 7 mph from the W.
    Night Details
    Clear. Low temperature around 55F. Dew point will be around 49F with an average humidity of 64%. Winds will be 4 mph from the W.
  • Forecast day icon
    Monday
    30% Chance of Rain
    68°
    Forecast night icon
    Night
    30% Chance of Rain
    54°
    Monday 5/13
    Day
    68°
    30% Chance of Rain
    Forecast day icon
    Night
    54°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 68F. Dew point will be around 49F with an average humidity of 61%. Winds will be 2 mph from the SW.
    Night Details
    Mostly clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 54F. Dew point will be around 48F with an average humidity of 66%. Winds will be 1 mph from the SE.