Santa Ana weather in May: Santa Ana, California: normal highs, lows, rain and records for May
Santa Ana in May has a normal high of 71°F and a normal low of 59°F, a daily mean of 65°F, holding near 71°F all month. Measurable precipitation falls on 2 days in a normal May, 0.27 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 15°C, 7 mm of precipitation in May.
- NOAA stationSanta Ana John Wayne Airport
- Station IDUSW00093184
- Location33.68°N 117.87°W
- Elevation54 ft (17 m)
- From the center4 miles
- Population316,184
- Jan 67° 49°
- Feb 67° 50°
- Mar 68° 52°
- Apr 70° 55°
- May 71° 59°
- Jun 74° 63°
- Jul 79° 66°
- Aug 80° 67°
- Sep 80° 65°
- Oct 77° 59°
- Nov 72° 53°
- Dec 67° 48°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Santa Ana in May?
The normal high is 71°F and the normal low 59°F, for a daily mean of 65.3°F. May is 2.7°F warmer than April and 3.0°F cooler than June. May is the 6th warmest month of the year in Santa Ana and the 8th wettest. Across the month the normal high rises 1°F, from 71°F on May 1 to 72°F on May 31. From one year to the next May's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Mays in three average between 63°F and 67°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 9%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 71°F | 57°F | 9% | 3% |
| May 8 | 71°F | 58°F | 8% | 3% |
| May 15 | 71°F | 59°F | 7% | 2% |
| May 22 | 71°F | 60°F | 6% | 2% |
| May 31 | 72°F | 61°F | 4% | 1% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 30, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 71°F | 57°F | 9% | 3% | 13 h 30 min |
| May 2 | 71°F | 57°F | 9% | 3% | 13 h 30 min |
| May 3 | 71°F | 58°F | 9% | 3% | 13 h 30 min |
| May 4 | 71°F | 58°F | 8% | 3% | 13 h 40 min |
| May 5 | 71°F | 58°F | 8% | 3% | 13 h 40 min |
| May 6 | 71°F | 58°F | 8% | 3% | 13 h 40 min |
| May 7 | 71°F | 58°F | 8% | 3% | 13 h 40 min |
| May 8 | 71°F | 58°F | 8% | 3% | 13 h 40 min |
| May 9 | 71°F | 58°F | 8% | 3% | 13 h 40 min |
| May 10 | 71°F | 59°F | 8% | 3% | 13 h 50 min |
| May 11 | 71°F | 59°F | 7% | 2% | 13 h 50 min |
| May 12 | 71°F | 59°F | 7% | 2% | 13 h 50 min |
| May 13 | 71°F | 59°F | 7% | 2% | 13 h 50 min |
| May 14 | 71°F | 59°F | 7% | 2% | 13 h 50 min |
| May 15 | 71°F | 59°F | 7% | 2% | 13 h 50 min |
| May 16 | 71°F | 59°F | 7% | 2% | 13 h 50 min |
| May 17 | 71°F | 60°F | 7% | 2% | 14 h |
| May 18 | 71°F | 60°F | 7% | 2% | 14 h |
| May 19 | 71°F | 60°F | 6% | 2% | 14 h |
| May 20 | 71°F | 60°F | 6% | 2% | 14 h |
| May 21 | 71°F | 60°F | 6% | 2% | 14 h |
| May 22 | 71°F | 60°F | 6% | 2% | 14 h |
| May 23 | 71°F | 60°F | 6% | 2% | 14 h |
| May 24 | 71°F | 60°F | 6% | 2% | 14 h 10 min |
| May 25 | 71°F | 60°F | 5% | 1% | 14 h 10 min |
| May 26 | 71°F | 61°F | 5% | 1% | 14 h 10 min |
| May 27 | 71°F | 61°F | 5% | 1% | 14 h 10 min |
| May 28 | 71°F | 61°F | 5% | 1% | 14 h 10 min |
| May 29 | 72°F | 61°F | 5% | 1% | 14 h 10 min |
| May 30 | 72°F | 61°F | 5% | 1% | 14 h 10 min |
| May 31 | 72°F | 61°F | 4% | 1% | 14 h 10 min |
- Normal high
- 71°FMay average
- Normal low
- 59°FMay average
- Precipitation
- 0.27 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 30 min to 14 h 10 minMay 1 to May 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 3
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093184; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Santa Ana in May?
On a given May day the chance of 0.01 inch or more is 7% on average, highest around May 1 (9%). In all, 0.27 in falls on 2 days of a normal May.
In a normal May in Santa Ana, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093184.
What are the records for May in Santa Ana?
The warmest May temperature on this station's record (since 1999) is 98°F, on May 2, 2004; the coldest is 49°F, on May 1, 1999. The wettest May brought 1.07 in (2015).
The May mean against the 1991-2020 normal of 65.3°F: 2021 66.3°F (+1.0), 2022 66.7°F (+1.4), 2023 63.5°F (−1.8), 2024 64.2°F (−1.1), 2025 67.0°F (+1.7), 2026 65.7°F (+0.4). 4 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.3°F | +1.0°F | 0.15 in |
| 2022 | 66.7°F | +1.4°F | 0.04 in |
| 2023 | 63.5°F | −1.8°F | 0.49 in |
| 2024 | 64.2°F | −1.1°F | 0.06 in |
| 2025 | 67.0°F | +1.7°F | 0.00 in |
| 2026 | 65.7°F | +0.4°F | 0.01 in |
Source: records: ACIS, station USW00093184; recent months: ACIS, station USW00093184. Records and recent months use complete months only.
How does May in Santa Ana compare across California?
Across the 219 places PlainClimate covers in California, May normal highs run from 58°F in Tahoma to 96°F in Needles; Santa Ana's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.