10-Day Weather Forecast - Saint Marys, IA

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  • 99|79°F
    Hot and Humid

    Today

    99°F

    Mostly sunny. Hot. Near steady temperature in the upper 90s. Southwest winds around 10 mph. Heat index values up to 116.

    Tonight

    79°F

    Partly cloudy with a slight chance of showers. A slight chance of thunderstorms after midnight. Humid with lows in the upper 70s. South winds 10 to 15 mph. Chance of rain 20 percent. Heat index values up to 112 early in the evening.

    Hourly details
  • 95|73°F
    30% Chance of Rain

    Day

    95°F

    Sunny hot with highs in the mid 90s. Southwest winds around 10 mph with gusts up to 20 mph becoming northwest in the afternoon. Heat index values up to 112 in the afternoon.

    Night

    73°F

    Mostly clear in the evening then becoming partly cloudy. Patchy smoke. Humid with lows in the lower 70s. North winds 5 to 10 mph. Heat index values up to 109 early in the evening.

    Hourly details
  • 89|70°F
    Partly Sunny

    Day

    89°F

    Partly sunny. Humid with highs in the upper 80s. Northeast winds 5 to 10 mph.

    Night

    70°F

    Partly cloudy. Lows in the upper 60s.

    Hourly details
  • 91|71°F
    Sunny

    Day

    91°F

    Sunny. Highs around 90.

    Night

    71°F

    Mostly clear. Lows in the upper 60s.

    Hourly details
  • 88|71°F
    Partly Sunny

    Day

    88°F

    Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent.

    Night

    71°F

    Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening then showers likely after midnight. Lows in the upper 60s. Chance of rain 70 percent.

    Hourly details
  • 86|68°F
    50% Chance of Storms

    Day

    86°F

    Partly sunny with a slight chance of thunderstorms. A chance of showers mainly in the morning. Highs in the lower 80s. Chance of rain 50 percent.

    Night

    68°F

    Partly cloudy. Lows in the mid 60s.

    Hourly details
  • 86|67°F
    Sunny

    Day

    86°F

    Sunny. Highs in the lower 80s.

    Night

    67°F

    Mostly clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 67F. Dew point will be around 69F with an average humidity of 86%. Winds will be 4 mph from the NE.

  • 86|69°F
    Sunny

    Day

    86°F

    Sunny. High temperature around 86F. Dew point will be around 71F with an average humidity of 76%. Winds will be 2 mph from the E.

    Night

    69°F

    Clear. Low temperature around 69F. Dew point will be around 69F with an average humidity of 80%. Winds will be 4 mph from the SE.

  • 88|70°F
    Mostly Sunny

    Day

    88°F

    Mostly sunny with widely scattered thunderstorms. Chance of storms 25%. High temperature around 88F. Dew point will be around 72F with an average humidity of 74%. Winds will be 4 mph from the S.

    Night

    70°F

    Mostly clear with a 25% chance for rain and thunderstorms. Low temperature around 70F. Dew point will be around 69F with an average humidity of 74%. Winds will be 4 mph from the S.

  • 85|64°F
    30% Chance of Rain

    Day

    85°F

    Mostly sunny with a 30% chance for rain and thunderstorms. High temperature around 85F. Dew point will be around 69F with an average humidity of 72%. Winds will be 3 mph from the N.

    Night

    64°F

    Mostly clear with a 30% chance for rain and thunderstorms. Low temperature around 64F. Dew point will be around 66F with an average humidity of 80%. Winds will be 4 mph from the N.