Irvine, CA weather in May
May in Irvine: mild and dry. Highs 75°F, lows 58°F, about 2 wet days. A great month for outdoor plans.
- Normal high
- 75°F
- Normal low
- 58°F
- Wet days
- 2
- 0.3 in total
- Muggy days
- 0
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 74°F | 75°F |
| Normal low | 56°F | 60°F |
| Chance of a wet day | 7% | 4% |
| Sunrise / sunset | 6:02 am / 7:34 pm | 5:42 am / 7:55 pm |
| Daylight | 13.5 h | 14.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical May day
- 6 am60°Fdew point 54°F
- 9 am65°Fdew point 54°F
- Noon67°Fdew point 54°F
- 3 pm67°Fdew point 54°F
- 6 pm63°Fdew point 54°F
- 9 pm61°Fdew point 54°F
NOAA hourly normals (local standard time) from Los Angeles Intl Airport (37 mi away); average wind 8 mph; clear or few clouds in 42% of daytime hours, mostly cloudy or overcast in 33%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F25 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph5 of 31
- Hot dayshigh 90°F or more2 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow2 of 31
- Notable rainat least 0.10 in1 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 0.3 in; a dry May brings about 0.0 in and a wet one about 0.5 in (25th and 75th percentiles). Days with half an inch or more are rare.
How May varies from year to year
- Warmest May, 1991-20202004: average high 82°F
- Coolest May1995: average high 70°F
- Wettest May1998: 2.5 in
- Driest May1991: no measurable precipitation
- Highest reading105°F (May 3, 2004)
- Lowest reading45°F (May 1, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 73°F | 75°F | 78°F |
| Normal low | 54°F | 58°F | 61°F |
| Wet days | 3 | 2 | 1 |
| Comfortable days | 22 | 25 | 19 |
| Daylight | 13.0 h | 13.9 h | 14.3 h |
Highs change by +2°F from April and +3°F into June.
Nearby alternatives in May
- Warmer: Corona, CA20 mi · high 81°F · 1 wet day
- Cooler: Torrance, CA32 mi · high 70°F · 2 wet days
How Irvine ranks in May
- Normal high198th warmest of 378 cities; 38th of 60 in California
- Wet days25th driest of 378
- Comfortable days5th most of 339
Heating and cooling
May has 31 heating degree days and 75 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Irvine in May?
The normal high is 75°F and the normal low is 58°F. From 1991 to 2020 the hottest May reading was 105°F (May 3, 2004).
Does it rain a lot in Irvine in May?
About 2 days in May have at least 0.01 in of precipitation, and the normal total is 0.3 in. The wettest May in 1991-2020 was in 1998 (2.5 in); the driest was in 1991, with no measurable precipitation.
Is May a good time to visit Irvine?
May ranks 1st of 12 months on our comfort score for Irvine (88 out of 100). It has about 25 comfortable days and about 2 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Santa Ana Fire Stn (USC00047888), 5.7 mi NNW of the city center, 135 ft (81 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Santa Ana John Wayne Airport (USW00093184), 2.6 mi WNW of the city center, 54 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Los Angeles Intl Airport (USW00023174), 37 mi WNW of the city center, 97 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: J. Wayne Apt-Orange Co Apt (722977-93184), 2.6 mi WNW of the city center, 43 ft . Hourly observations, 1991-2020.