San Jacinto weather in May: San Jacinto, California: normal highs, lows, rain and records for May
San Jacinto in May has a normal high of 80°F and a normal low of 53°F, a daily mean of 67°F, rising from 77°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 2 days in a normal May, 0.47 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 12°C, 12 mm of precipitation in May.
- NOAA stationSan Jacinto
- Station IDUSC00047813
- Location33.80°N 116.98°W
- Elevation1,525 ft (465 m)
- From the center1 miles
- Population55,515
- Jan 66° 40°
- Feb 66° 42°
- Mar 70° 45°
- Apr 74° 48°
- May 80° 53°
- Jun 89° 58°
- Jul 95° 64°
- Aug 97° 64°
- Sep 92° 61°
- Oct 82° 53°
- Nov 73° 44°
- Dec 65° 39°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is San Jacinto in May?
The normal high is 80°F and the normal low 53°F, for a daily mean of 66.8°F. May is 5.6°F warmer than April and 6.4°F cooler than June. May is the 6th warmest month of the year in San Jacinto and the 8th wettest. Across the month the normal high rises 7°F, from 77°F on May 1 to 84°F on May 31. From one year to the next May's mean temperature typically moves about 3.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 63°F and 70°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 | 77°F | 51°F | 9% | 5% |
| May 8 | 78°F | 52°F | 8% | 4% |
| May 15 | 80°F | 53°F | 7% | 4% |
| May 22 | 82°F | 54°F | 6% | 3% |
| May 31 | 84°F | 55°F | 4% | 2% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 77°F | 51°F | 9% | 5% | 13 h 30 min |
| May 2 | 77°F | 51°F | 8% | 5% | 13 h 30 min |
| May 3 | 77°F | 51°F | 8% | 5% | 13 h 30 min |
| May 4 | 78°F | 51°F | 8% | 5% | 13 h 40 min |
| May 5 | 78°F | 52°F | 8% | 5% | 13 h 40 min |
| May 6 | 78°F | 52°F | 8% | 5% | 13 h 40 min |
| May 7 | 78°F | 52°F | 8% | 4% | 13 h 40 min |
| May 8 | 78°F | 52°F | 8% | 4% | 13 h 40 min |
| May 9 | 79°F | 52°F | 8% | 4% | 13 h 40 min |
| May 10 | 79°F | 53°F | 8% | 4% | 13 h 50 min |
| May 11 | 79°F | 53°F | 8% | 4% | 13 h 50 min |
| May 12 | 79°F | 53°F | 8% | 4% | 13 h 50 min |
| May 13 | 80°F | 53°F | 8% | 4% | 13 h 50 min |
| May 14 | 80°F | 53°F | 7% | 4% | 13 h 50 min |
| May 15 | 80°F | 53°F | 7% | 4% | 13 h 50 min |
| May 16 | 80°F | 54°F | 7% | 4% | 13 h 50 min |
| May 17 | 81°F | 54°F | 7% | 3% | 14 h |
| May 18 | 81°F | 54°F | 7% | 3% | 14 h |
| May 19 | 81°F | 54°F | 7% | 3% | 14 h |
| May 20 | 81°F | 54°F | 7% | 3% | 14 h |
| May 21 | 82°F | 54°F | 6% | 3% | 14 h |
| May 22 | 82°F | 54°F | 6% | 3% | 14 h |
| May 23 | 82°F | 54°F | 6% | 3% | 14 h |
| May 24 | 82°F | 55°F | 6% | 3% | 14 h 10 min |
| May 25 | 83°F | 55°F | 6% | 3% | 14 h 10 min |
| May 26 | 83°F | 55°F | 5% | 3% | 14 h 10 min |
| May 27 | 83°F | 55°F | 5% | 2% | 14 h 10 min |
| May 28 | 84°F | 55°F | 5% | 2% | 14 h 10 min |
| May 29 | 84°F | 55°F | 5% | 2% | 14 h 10 min |
| May 30 | 84°F | 55°F | 4% | 2% | 14 h 10 min |
| May 31 | 84°F | 55°F | 4% | 2% | 14 h 10 min |
- Normal high
- 80°FMay average
- Normal low
- 53°FMay average
- Precipitation
- 0.47 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 13 h 30 min to 14 h 10 minMay 1 to May 31
- Days at 70°F or more
- 27
- Days at 80°F or more
- 20
- Sunshine
- 93%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00047813; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in San Jacinto 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, 0.47 in falls on 2 days of a normal May.
In a normal May in San Jacinto, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00047813.
What are the records for May in San Jacinto?
The May mean against the 1991-2020 normal of 66.8°F: 2021 67.7°F (+0.9), 2022 68.0°F (+1.2), 2023 65.5°F (−1.3), 2024 66.5°F (−0.3), 2025 68.8°F (+2.0), 2026 68.1°F (+1.3). 4 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.7°F | +0.9°F | 0.00 in |
| 2022 | 68.0°F | +1.2°F | 0.00 in |
| 2023 | 65.5°F | −1.3°F | 0.53 in |
| 2024 | 66.5°F | −0.3°F | 0.11 in |
| 2025 | 68.8°F | +2.0°F | 0.39 in |
| 2026 | 68.1°F | +1.3°F | 0.12 in |
Source: recent months: ACIS, station USC00047813. Records and recent months use complete months only.
How does May in San Jacinto 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; San Jacinto's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.