| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 19.3° | 9.2° | 67.9mm | 5.5 | 87 |
| February | 18.7° | 9.2° | 76.2mm | 6 | 84 |
| March | 19.2° | 10.6° | 51mm | 5.4 | 87 |
| April | 20° | 11.8° | 12.3mm | 2.5 | 95 |
| May | 20.3° | 13.7° | 5.9mm | 1.7 | 97 |
| June | 21.9° | 15.7° | 0.2mm | 0.3 | 99 |
| July | 23.9° | 17.4° | 2.7mm | 0.6 | 99 |
| August | 24.6° | 17.6° | 3.9mm | 0.5 | 99 |
| September | 24.8° | 17° | 4mm | 1 | 98 |
| October | 23.4° | 14.7° | 13.2mm | 3.3 | 93 |
| November | 21.5° | 11.4° | 16.1mm | 3.7 | 93 |
| December | 18.7° | 9° | 61.2mm | 6.4 | 83 |
January in Santa Monica averages a daily high of 19.3°C with nights around 9.2°C. Expect roughly 5.5 wet days totalling 67.9mm. Comfortable conditions for being outdoors all day.
February in Santa Monica averages a daily high of 18.7°C with nights around 9.2°C. Expect roughly 6 wet days totalling 76.2mm. Comfortable conditions for being outdoors all day.
March in Santa Monica averages a daily high of 19.2°C with nights around 10.6°C. Expect roughly 5.4 wet days totalling 51mm. Comfortable conditions for being outdoors all day.
April in Santa Monica averages a daily high of 20°C with nights around 11.8°C. Rain is rare — about 2.5 wet days and 12.3mm across the month. Comfortable conditions for being outdoors all day.
May in Santa Monica averages a daily high of 20.3°C with nights around 13.7°C. Rain is rare — about 1.7 wet days and 5.9mm across the month. Comfortable conditions for being outdoors all day.
June in Santa Monica averages a daily high of 21.9°C with nights around 15.7°C. Rain is rare — about 0.3 wet days and 0.2mm across the month. Comfortable conditions for being outdoors all day.
July in Santa Monica averages a daily high of 23.9°C with nights around 17.4°C. Rain is rare — about 0.6 wet days and 2.7mm across the month. Comfortable conditions for being outdoors all day.
August in Santa Monica averages a daily high of 24.6°C with nights around 17.6°C. Rain is rare — about 0.5 wet days and 3.9mm across the month. Comfortable conditions for being outdoors all day.
September in Santa Monica averages a daily high of 24.8°C with nights around 17°C. Rain is rare — about 1 wet days and 4mm across the month. Comfortable conditions for being outdoors all day.
October in Santa Monica averages a daily high of 23.4°C with nights around 14.7°C. Expect roughly 3.3 wet days totalling 13.2mm. Comfortable conditions for being outdoors all day.
November in Santa Monica averages a daily high of 21.5°C with nights around 11.4°C. Expect roughly 3.7 wet days totalling 16.1mm. Comfortable conditions for being outdoors all day.
December in Santa Monica averages a daily high of 18.7°C with nights around 9°C. Expect roughly 6.4 wet days totalling 61.2mm. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Santa Monica peaks at 99.
Based on 30 years of records, April–November scores highest for comfort in Santa Monica, balancing daytime temperature against rainfall.
September is the warmest, averaging a daily high of 24.8°C.
February is the wettest, averaging 76.2mm of rain across roughly 6 wet days.
February is the coolest month, with average daily highs around 18.7°C.