Temperatures will climb today to levels considerably above normal, forecasters said.
The unseasonable heat is the product of a ridge on interior high pressure combined with an offshore flow, said National Weather Service meteorologist Kristen Stewart.
The NWS forecast for Pasadena calls for sunny skies with a high near 84. Tonight should be mostly clear, with a low around 51.
Stewart said areas where temperatures will be 80 degrees are normally in the upper 60s at this time of the year.
Sunday the warm weather will hit a speed bump, and temps will drop and rain could wash the city with a 30 percent chance of showers after 4 p.m. Sunday will see increasing clouds, with a high near 71.
Sunday Night faces a 40 percent chance of showers before 10 p.m. It is expected to be cloudy, then gradual clear toward daybreak, with a low around 43.
Here is the outlook:
Today: Sunny, with a high near 84. North northeast wind 5 to 10 mph becoming southwest in the afternoon.
Tonight: Clear, with a low around 51. Northeast wind around 5 mph becoming east southeast in the evening.
Sunday: A 30 percent chance of showers after 4 p.m. Increasing clouds, with a high near 71. South southeast wind 5 to 10 mph becoming southwest in the afternoon.
Sunday Night: A 40 percent chance of showers before 10 p.m. Cloudy, then gradual clearing toward daybreak, with a low around 43. Breezy, with a west southwest wind 10 to 20 mph becoming north northwest in the evening. Winds could gust as high as 25 mph.
Monday: Sunny, with a high near 60. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night: Mostly clear, with a low around 37.
Tuesday: Sunny, with a high near 62.
Tuesday Night: Partly cloudy, with a low around 37.
Wednesday: Mostly sunny, with a high near 65.
Wednesday Night: Partly cloudy, with a low around 41.
Thursday: Sunny, with a high near 69.
Thursday Night: Clear, with a low around 45.
Friday: Sunny, with a high near 72.
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