National Weather Service Forecast for: Pomona CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 9:01 pm PST Dec 22, 2025
 
Overnight

Overnight: Cloudy, with a low around 52. West wind around 5 mph.
Cloudy

 Tuesday

Tuesday: Rain likely, mainly after 4pm. Cloudy, with a high near 64. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Slight Chance
Rain then
Rain Likely
 Tuesday
Night
Tuesday Night: Rain likely before 10pm, then rain and possibly a thunderstorm between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 55. East southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Showers

 Wednesday

Wednesday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 60. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Heavy Rain

 Wednesday
Night
Wednesday Night: Showers. Low around 53. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Showers

 Christmas
Day
Christmas Day: Showers. High near 59. Chance of precipitation is 90%.
Showers

 Thursday
Night
Thursday Night: Showers. Low around 51. Chance of precipitation is 100%.
Showers

 Friday

Friday: Showers. Cloudy, with a high near 57.
Showers

 Friday
Night
Friday Night: A chance of showers. Mostly cloudy, with a low around 44.
Chance
Showers
Lo 52 °F Hi 64 °F Lo 55 °F Hi 60 °F Lo 53 °F Hi 59 °F Lo 51 °F Hi 57 °F Lo 44 °F

Flood Watch
Wind Advisory
 

Overnight
 
 Cloudy, with a low around 52. West wind around 5 mph.
Tuesday
 
 Rain likely, mainly after 4pm. Cloudy, with a high near 64. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain likely before 10pm, then rain and possibly a thunderstorm between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 55. East southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 60. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Wednesday Night
 
 Showers. Low around 53. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Christmas Day
 
 Showers. High near 59. Chance of precipitation is 90%.
Thursday Night
 
 Showers. Low around 51. Chance of precipitation is 100%.
Friday
 
 Showers. Cloudy, with a high near 57.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 44.
Saturday
 
 A slight chance of showers. Mostly sunny, with a high near 58.
Saturday Night
 
 A slight chance of showers. Mostly clear, with a low around 41.
Sunday
 
 Sunny, with a high near 62.
Sunday Night
 
 Mostly clear, with a low around 43.
Monday
 
 A slight chance of showers. Mostly sunny, with a high near 64.

 

Forecast from NOAA-NWS for Pomona CA.