National Weather Service Forecast for: Merriam KS
Issued by: National Weather Service Kansas City/Pleasant Hill, MO
Updated: 11:07 pm CDT Sep 12, 2026
 
Overnight

Overnight: A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 65. Northeast wind 3 to 5 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
Chance
T-storms
 Sunday

Sunday: Mostly cloudy, with a high near 79. East wind 6 to 8 mph.
Mostly Cloudy

 Sunday
Night
Sunday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. East wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Chance
T-storms
 Monday

Monday: A slight chance of showers and thunderstorms before 8am. Mostly cloudy through mid morning, then gradual clearing, with a high near 90. Heat index values as high as 100. South wind 11 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Slight Chance
T-storms then
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 75. South wind around 14 mph, with gusts as high as 24 mph.
Mostly Clear

 Tuesday

Tuesday: Showers, with thunderstorms also possible after 4pm. High near 85. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Showers
 Tuesday
Night
Tuesday Night: Showers, with thunderstorms also possible after 7pm. Low around 68. Chance of precipitation is 80%.
Showers

 Wednesday

Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Showers
Likely
 Wednesday
Night
Wednesday Night: A chance of showers after 1am. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Partly Cloudy
then Chance
Showers
Lo 65 °F Hi 79 °F Lo 66 °F Hi 90 °F Lo 75 °F Hi 85 °F Lo 68 °F Hi 86 °F Lo 72 °F

Hazardous Weather Outlook
 

Overnight
 
 A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 65. Northeast wind 3 to 5 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
 Mostly cloudy, with a high near 79. East wind 6 to 8 mph.
Sunday Night
 
 A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. East wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Monday
 
 A slight chance of showers and thunderstorms before 8am. Mostly cloudy through mid morning, then gradual clearing, with a high near 90. Heat index values as high as 100. South wind 11 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday Night
 
 Mostly clear, with a low around 75. South wind around 14 mph, with gusts as high as 24 mph.
Tuesday
 
 Showers, with thunderstorms also possible after 4pm. High near 85. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
 
 Showers, with thunderstorms also possible after 7pm. Low around 68. Chance of precipitation is 80%.
Wednesday
 
 Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Wednesday Night
 
 A chance of showers after 1am. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Thursday
 
 A chance of showers before 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Thursday Night
 
 A chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 40%.
Friday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 50%.
Friday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 50%.
Saturday
 
 A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Merriam KS.