Monthly climate guide
Santa Ana weather in May
May in Santa Ana is typically mild, with average daytime highs around 19°C (65°F) and night-time lows near 15°C (58°F). The month usually brings about 10 mm of rain (very dry) and is a mix of sun and cloud. Daytime highs are about the same as April and about the same as June.
What stands out in May
- It's one of the drier months, with about 60% less rain than Santa Ana's average.
- Days and nights are close, only about 4°C apart.
- Santa Ana is usually about 5°C cooler than Los Angeles, 50 km away, in May.
- Seasonally, May counts as late spring in Santa Ana.
Avg high
19°C
65°F
Avg low
15°C
58°F
Rainfall
10 mm
very dry
Humidity
78%
relative
Sky
44%
cloud · a mix of sun and cloud
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 May
- A warm sweater or fleece for layering
- A mid-weight jacket
Is May 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 May
Cite or embed this data
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Santa Ana weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/santa-ana-usa/may
<a href="https://weathercompare.eu/weather/usa/santa-ana-usa/may">Santa Ana weather in May</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 May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/santa-ana-usa/may">Santa Ana weather in May</a> – WeatherCompare</p>
Santa Ana in May: quick answers
Is May a good time to visit Santa Ana?
Yes. May is one of the best months for Santa Ana, with highs around 19°C and about 10 mm of rain.
How warm is Santa Ana in May?
Average highs are about 19°C (65°F) and average lows about 15°C (58°F), based on 10 years of daily data.
Does it rain a lot in Santa Ana in May?
Santa Ana typically gets around 10 mm of rain in May — 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.