Rain Likely Tonight and Friday

A cooling trend kicks in Thursday as a frontal system brings clouds and rain to the entire Pasadena area Thursday night and Friday, National Weather Service forecasters said.

The big news today will be the temperature drop which could be as much as 6 degrees below the week’s previous high.

Dry and warmer weather is expected for the weekend but a cold upper low will bring cooler temperatures and windy conditions early next week.

Rainfall amounts should end up under a quarter inch for the western san Gabriel Calley.

Temps will fall another 3 to 6 degrees on Friday, making this the coolest day in quite a while. In Pasadena, a high of 68 is expected.

Saturday will be sunny and clear and won’t warm up to normal temperatures but will climb to 72.

Here is the detailed NWS forecast:

Today: Cloudy, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.

Tonight: A 40 percent chance of rain, mainly after 11 p.m. Mostly cloudy, with a low around 58. South wind around 5 mph.

Friday: Rain likely, mainly before 11 a.m. Mostly cloudy, with a high near 68. South wind 5 to 10 mph. The chance of precipitation is 60%.

Friday Night: Mostly clear, with a low around 52. Southwest wind 5 to 10 mph becoming east northeast after midnight.

Saturday: Sunny, with a high near 72. North northeast wind 5 to 10 mph becoming west southwest in the afternoon.

Saturday Night: Clear, with a low around 52.

Sunday: Sunny, with a high near 79.

Sunday Night: Clear, with a low around 53.

Columbus Day: Sunny, with a high near 75.

Monday Night: Mostly clear, with a low around 49.

Tuesday: Sunny, with a high near 72.

Tuesday Night: Clear, with a low around 47.

Wednesday: Sunny, with a high near 76.