Here's the monthly averages.
(Sorry for the format; it's a copy'n'paste job.)
Cheers, mate!
Los Angeles
Month, Precipitation, Maximum Minimum temps.
inches cm F C F C
May 0.25 0.6 73 23 57 14
June 0.08 0.2 77 25 60 16
July 0.01 0.0 82 28 63 17
August 0.07 0.2 84 29 64 18
September 0.28 0.7 82 28 63 17
October 0.38 1.0 78 26 59 15
On any day, but especially in summer, the daytime temperature at the beaches will be 2-7 degrees cooler than the temperatures above, which were measured downtown.
May, June
Clear days and little fog.
One of the best times of year to visit.
Shorts on the warmest days.
Short-sleeved shirts and light-weight pants, jacket for evenings.
July, August
Warm days.
Morning fog can linger until noon.
Evening fog comes in suddenly and can be cold.
Shorts for daytime, light-weight pants and jacket for evenings.
September, October
Clear days and little fog.
Shorts on the warmest days.
Short-sleeved shirts and light-weight pants, jacket for evenings.