National Weather Service Forecast for: Atchison KS
Issued by: National Weather Service Kansas City/Pleasant Hill, MO
Updated: 2:21 am CDT Aug 20, 2026
 
Overnight

Overnight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 64. Calm wind.
Patchy Fog

 Thursday

Thursday: Patchy fog before 10am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Light and variable wind.
Patchy Fog
then Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 67. Light and variable wind.
Mostly Clear

 Friday

Friday: Sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny

 Friday
Night
Friday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67. Light and variable wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
Chance
T-storms
 Saturday

Saturday: Mostly sunny, with a high near 86.
Mostly Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 64.
Mostly Clear

 Sunday

Sunday: Partly sunny, with a high near 82.
Partly Sunny

 Sunday
Night
Sunday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Mostly Cloudy
then Chance
T-storms
Lo 64 °F Hi 83 °F Lo 67 °F Hi 88 °F Lo 67 °F Hi 86 °F Lo 64 °F Hi 82 °F Lo 65 °F

Hazardous Weather Outlook
 

Overnight
 
 Patchy fog after 5am. Otherwise, partly cloudy, with a low around 64. Calm wind.
Thursday
 
 Patchy fog before 10am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Light and variable wind.
Thursday Night
 
 Mostly clear, with a low around 67. Light and variable wind.
Friday
 
 Sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
 
 A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67. Light and variable wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 Mostly sunny, with a high near 86.
Saturday Night
 
 Mostly clear, with a low around 64.
Sunday
 
 Partly sunny, with a high near 82.
Sunday Night
 
 A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Monday
 
 Partly sunny, with a high near 85.
Monday Night
 
 Mostly clear, with a low around 66.
Tuesday
 
 Partly sunny, with a high near 87.
Tuesday Night
 
 Partly cloudy, with a low around 67.
Wednesday
 
 Partly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Atchison KS.