Monthly climate guide
Santa Ana weather in October
Expect warm weather in Santa Ana in October: afternoons reach about 23°C (73°F), while nights drop to around 18°C (65°F). Around 8 mm of rain falls over the month (very dry), and skies are mostly sunny. Daytime highs are about the same as September and 3°C warmer than November.
What stands out in October
- Only 2 months are warmer in Santa Ana than October.
- Just 50 km apart, but Santa Ana runs about 4°C cooler than Los Angeles this month.
- Rain is well below Santa Ana's usual level (around 68% less).
- There's little difference between day and night (around 5°C).
Avg high
23°C
73°F
Avg low
18°C
65°F
Rainfall
8 mm
very dry
Humidity
71%
relative
Sky
28%
cloud · mostly sunny
Santa Ana weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 18°C / 64°F | 13°C / 56°F | 67 mm | 69% | 41% |
| February | 17°C / 63°F | 13°C / 55°F | 50 mm | 71% | 37% |
| March | 17°C / 63°F | 13°C / 56°F | 49 mm | 76% | 44% |
| April | 18°C / 65°F | 14°C / 57°F | 17 mm | 76% | 40% |
| May | 19°C / 65°F | 15°C / 58°F | 10 mm | 78% | 44% |
| June | 20°C / 68°F | 16°C / 60°F | 1 mm | 78% | 41% |
| July | 22°C / 72°F | 18°C / 65°F | 2 mm | 76% | 34% |
| August | 23°C / 74°F | 19°C / 66°F | 1 mm | 75% | 28% |
| September | 24°C / 75°F | 19°C / 67°F | 4 mm | 74% | 27% |
| October | 23°C / 73°F | 18°C / 65°F | 8 mm | 71% | 28% |
| November | 20°C / 69°F | 16°C / 61°F | 30 mm | 67% | 34% |
| December | 18°C / 64°F | 14°C / 56°F | 59 mm | 66% | 40% |
What to pack for October
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- Sunglasses
Is October a good time to visit Santa Ana?
Compare the months in the chart above to find your ideal window.
Best time to visit Santa Ana →Other United States cities in October
Cite or embed this data
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Santa Ana weather in October. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/santa-ana-usa/october
<a href="https://weathercompare.eu/weather/usa/santa-ana-usa/october">Santa Ana weather in October</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/santa-ana-usa" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Santa Ana weather in October"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/santa-ana-usa/october">Santa Ana weather in October</a> – WeatherCompare</p>
Santa Ana in October: quick answers
Is October a good time to visit Santa Ana?
October is a reasonable time for Santa Ana: highs around 23°C and about 8 mm of rain, though not one of the three best months.
How warm is Santa Ana in October?
Average highs are about 23°C (73°F) and average lows about 18°C (65°F), based on 10 years of daily data.
Does it rain a lot in Santa Ana in October?
Santa Ana typically gets around 8 mm of rain in October — very dry.
Figures are long-term averages for the area around Santa Ana (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.