| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.6° | 22.9° | — | — | 72 |
| February | 33° | 23.5° | — | — | 70 |
| March | 33.6° | 24.4° | — | — | 68 |
| April | 34° | 25.3° | — | — | 66 |
| May | 33.4° | 25° | — | — | 68 |
| June | 33° | 24.4° | — | — | 70 |
| July | 33.1° | 24° | — | — | 70 |
| August | 33.2° | 24° | — | — | 69 |
| September | 32.2° | 23.8° | — | — | 73 |
| October | 32.1° | 23.9° | — | — | 74 |
| November | 32.7° | 23.6° | — | — | 71 |
| December | 32.8° | 23.4° | — | — | 71 |
January in Santa Ana averages a daily high of 32.6°C with nights around 22.9°C. Generally workable, with some weather to plan around.
February in Santa Ana averages a daily high of 33°C with nights around 23.5°C. Generally workable, with some weather to plan around.
March in Santa Ana averages a daily high of 33.6°C with nights around 24.4°C. Generally workable, with some weather to plan around.
April in Santa Ana averages a daily high of 34°C with nights around 25.3°C. Generally workable, with some weather to plan around.
May in Santa Ana averages a daily high of 33.4°C with nights around 25°C. Generally workable, with some weather to plan around.
June in Santa Ana averages a daily high of 33°C with nights around 24.4°C. Generally workable, with some weather to plan around.
July in Santa Ana averages a daily high of 33.1°C with nights around 24°C. Generally workable, with some weather to plan around.
August in Santa Ana averages a daily high of 33.2°C with nights around 24°C. Generally workable, with some weather to plan around.
September in Santa Ana averages a daily high of 32.2°C with nights around 23.8°C. Generally workable, with some weather to plan around.
October in Santa Ana averages a daily high of 32.1°C with nights around 23.9°C. Generally workable, with some weather to plan around.
November in Santa Ana averages a daily high of 32.7°C with nights around 23.6°C. Generally workable, with some weather to plan around.
December in Santa Ana averages a daily high of 32.8°C with nights around 23.4°C. Generally workable, with some weather to plan around.
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 Ana peaks at 74.
Based on 30 years of records, Any time of year scores highest for comfort in Santa Ana, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 34°C.
January is the wettest, averaging —mm of rain across roughly — wet days.
October is the coolest month, with average daily highs around 32.1°C.