National Weather Service Forecast for: Dubuque IA
Issued by: National Weather Service Quad Cities, IA/IL
Updated: 1:26 am CDT Aug 20, 2026
 
Today

Today: Patchy fog before 8am. Otherwise, sunny, with a high near 81. Calm wind becoming south around 5 mph.
Patchy Fog
then Sunny

 Tonight

Tonight: A slight chance of showers between 3am and 4am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 65. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 20%.
Partly Cloudy
then Slight
Chance
T-storms
 Friday

Friday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 82. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 70%.
Chance
Showers then
Showers
Likely
 Friday
Night
Friday Night: A 30 percent chance of showers, mainly before 8pm. Mostly clear, with a low around 63. Northwest wind around 5 mph.
Chance
Showers then
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 79.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 59.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 77.
Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 58.
Partly Cloudy

 Monday

Monday: Mostly sunny, with a high near 77.
Mostly Sunny
Hi 81 °F Lo 65 °F Hi 82 °F Lo 63 °F Hi 79 °F Lo 59 °F Hi 77 °F Lo 58 °F Hi 77 °F

Hazardous Weather Outlook
 

Today
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 81. Calm wind becoming south around 5 mph.
Tonight
 
 A slight chance of showers between 3am and 4am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 65. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 20%.
Friday
 
 A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 82. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 70%.
Friday Night
 
 A 30 percent chance of showers, mainly before 8pm. Mostly clear, with a low around 63. Northwest wind around 5 mph.
Saturday
 
 Sunny, with a high near 79.
Saturday Night
 
 Mostly clear, with a low around 59.
Sunday
 
 Sunny, with a high near 77.
Sunday Night
 
 Partly cloudy, with a low around 58.
Monday
 
 Mostly sunny, with a high near 77.
Monday Night
 
 Partly cloudy, with a low around 61.
Tuesday
 
 Mostly sunny, with a high near 80.
Tuesday Night
 
 A 30 percent chance of showers. Partly cloudy, with a low around 65.
Wednesday
 
 Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Dubuque IA.