Irvine, CA Weather
Irvine hourly forecast: next 24 hours
Today's high of 88°F (31°C) is about 7°F (4°C) above the typical July high of 81°F (27°C).
Current conditions in detail
Irvine weather tomorrow (Saturday, July 18)
Tomorrow in Irvine looks sunny, with a high of 80° and an overnight low of 70°. Rain is unlikely (5% chance). Winds top out near 10 mph, and the UV index reaches 11 (extreme).
Irvine 14-day forecast
About the weather in Irvine
Weather in Irvine is shaped by its semi-arid climate - expect big day-to-night temperature swings and modest rainfall. August afternoons typically reach 83°F (28°C), while January highs hover near 65°F (18°C). Annual precipitation averages 14.6 inches (370 mm) over about 40 rainy days.
Irvine weather: quick facts
- Hottest month: August - highs near 83°F (28°C)
- Coldest month: January - highs near 65°F (18°C)
- Record high: 108°F (42°C) · Record low: 34°F (1°C) (2015–2024)
- Wettest month: January (6 rainy days) · Sunniest: July (13.4 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 83°F (28°C) and overnight lows stay near 65°F (18°C). The coolest month is January, with typical highs of 65°F (18°C) and lows around 48°F (9°C). Based on 2015–2024 weather data, temperatures have reached as high as 108°F (42°C) and dropped as low as 34°F (1°C).
Rain, sun and snow
January is usually the wettest month. It brings about 3.1 inches (80 mm) of rain over 6 days, while July is the driest. July brings the most sunshine, averaging 13.4 hours of sun a day.
Season by season
Spring (March through May)
Spring in Irvine is pleasantly warm, with daytime highs averaging 70°F (21°C) and nights around 53°F (12°C); rain falls on about 15 days over the three months.
Summer (June through August)
Summer in Irvine is mild and warm, with daytime highs averaging 80°F (27°C) and nights around 63°F (17°C); precipitation is infrequent.
Fall (September through November)
Fall in Irvine is mild and warm, with daytime highs averaging 78°F (25°C) and nights around 59°F (15°C); precipitation is infrequent.
Winter (December through February)
Winter in Irvine is mild, with daytime highs averaging 66°F (19°C) and nights around 48°F (9°C); rain falls on about 16 days over the three months.
Average temperatures in Irvine by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 65° | 48° | 6 | 3.1 in | 8.4 h/day | 69% |
| February | 66° | 48° | 6 | 2.6 in | 9.1 h/day | 65% |
| March | 67° | 50° | 8 | 2.4 in | 10.4 h/day | 72% |
| April | 71° | 54° | 4 | 0.8 in | 11.3 h/day | 70% |
| May | 71° | 56° | 3 | 0.6 in | 12.0 h/day | 74% |
| June | 77° | 60° | 1 | 0.2 in | 13.0 h/day | 73% |
| July | 81° | 64° | 0 | 0.1 in | 13.4 h/day | 74% |
| August | 83° | 65° | 1 | 0.3 in | 12.4 h/day | 74% |
| September | 82° | 64° | 2 | 0.4 in | 11.3 h/day | 73% |
| October | 79° | 60° | 2 | 0.5 in | 10.3 h/day | 68% |
| November | 72° | 53° | 2 | 0.8 in | 9.5 h/day | 60% |
| December | 66° | 48° | 5 | 2.5 in | 8.1 h/day | 66% |