Irvine, California, enjoys a mild and pleasant climate year-round, making it a great place to live or visit.
The city experiences warm summers with average highs of 81°F in August and cooler winters with average lows of 48°F in December.
The summer months are especially appealing for outdoor activities with temperatures that rarely reach extremes.
During the spring, temperatures gradually rise from 66°F in March to nearly 70°F in May.
The rainfall in Irvine tends to decrease significantly as the year progresses, making the weather more predictable and enjoyable.
For those interested in more detailed monthly weather patterns and climate charts, this Irvine climate guide provides comprehensive information.
The city’s climate is classified as subtropical, providing a perfect blend of warm and cool temperatures that rarely sees harsh weather conditions.
This makes Irvine an attractive destination for people who prefer moderate weather without significant seasonal extremes.
Whether planning a visit or considering a move, Irvine’s climate offers something for everyone.
Average Temperature in Irvine, California
The average temperature in Irvine varies throughout the year.
Monthly Averages
- January: High of 67°F, Low of 48°F
- February: High of 68°F, Low of 49°F
- March: High of 66°F, Low of 51°F
- April: High of 70°F, Low of 54°F
- May: High of 73°F, Low of 58°F
- June: High of 76°F, Low of 61°F
- July: High of 80°F, Low of 64°F
- August: High of 81°F, Low of 65°F
- September: High of 80°F, Low of 64°F
- October: High of 76°F, Low of 58°F
- November: High of 71°F, Low of 51°F
- December: High of 67°F, Low of 48°F
The hottest month in Irvine is August, with temperatures peaking at 81°F.
Cool and Warm Seasons
The cool season lasts from late November to late March, with the average daily high below 69°F.
December is the coldest month, averaging a low of 48°F and a high of 67°F.
In contrast, the warm season spans from late June to late September.
July, August, and September have the highest temperatures, peaking in August.
Irvine’s moderate climate makes it an attractive location for those who prefer mild winters and warm summers.
Average Precipitation in Irvine, California
Irvine, California experiences mild rainfall throughout the year with no snow. The area has distinct wet and dry months, with significant variation in precipitation between seasons.
Average Rainfall in Irvine, California
The average yearly rainfall in Irvine measures around 14 inches.
The wettest months are typically from December to February, receiving about 2-3 inches of rain each month.
December stands out, not only as the coldest month, but also as the month with the highest rainfall, with an average of approximately 2.8 inches.
During the spring, rainfall decreases.
March receives around 0.87 inches, dropping to just 0.31 inches by May.
Summer months are generally dry, with less than 0.2 inches from June to September.
Rainy days also vary, with the wettest months having around 7-8 rainy days, while summer months often have fewer than one rainy day.
Average Snow in Irvine, California
Irvine, California, does not experience snow. The mild climate ensures temperatures do not drop low enough for snow to form.
Even in December, the coldest month, temperatures rarely fall below 48°F.
The lack of snow keeps Irvine free from the challenges of snow and ice seen in colder regions. This makes Irvine’s winters relatively easy to navigate and enjoy.
Average Sun in Irvine, California
Irvine generally enjoys a sunny climate with moderate seasonal shifts. The city experiences frequent bright and clear days, which makes it an attractive location for those who appreciate consistent sunlight throughout the year.
Average Daily Shortwave Solar Energy in Irvine, California
In Irvine, the average daily shortwave solar energy varies by month.
The highest average occurs in the summer months when daylight is plentiful and skies are mostly clear.
During this time, solar energy reaches up to 7.9 kWh/m² in July. This abundance of sunlight contributes to warm, dry conditions.
In winter, solar energy decreases as days become shorter and cloud cover increases.
December sees about 3.4 kWh/m². Despite shorter daylight hours, Irvine still benefits from moderate sun exposure even in the cooler months.
Daily variations in sunlight are also influenced by daylight saving time, which extends evening daylight from spring to fall.
This change allows for a longer period of sun exposure each day, enhancing the overall solar energy received.
Visitors and residents can expect ample sun during most of the year, supporting outdoor activities and solar energy use.
For further details, see Irvine Climate, Weather By Month.
Average Humidity in Irvine, California
In Irvine, California, humidity varies throughout the year.
During the summer months, humidity is generally lower. Early mornings can be sticky, but as the day progresses, it becomes more comfortable.
Specifically, August tends to have a lower relative humidity, making the warm temperatures more bearable.
In the cooler winter months, humidity levels rise.
The morning dew point—an indicator of moisture in the air—can make mornings feel quite damp. Relative humidity is higher at night and early morning.
Monthly Average Humidity
| Month | Relative Humidity (%) |
|---|---|
| January | 61% |
| February | 60% |
| March | 60% |
| April | 57% |
| May | 64% |
| June | 68% |
| July | 67% |
| August | 66% |
| September | 63% |
| October | 59% |
| November | 57% |
| December | 60% |
Humidity is a critical factor for those sensitive to muggy conditions.
By understanding Irvine’s average humidity, residents and visitors can better plan their activities.
For more details on Irvine’s climate, visit Weather and Climate in Irvine, CA.
Average Wind in Irvine, California
Wind speeds in Irvine, California, are generally mild throughout the year. The average wind speed is around 5-10 mph.
During the spring and summer months, the wind can feel slightly stronger due to the coastal location.
Monthly Wind Speed
| Month | Average Wind Speed (mph) |
|---|---|
| January | 7 |
| February | 7.5 |
| March | 8 |
| April | 8.5 |
| May | 9.5 |
| June | 9 |
| July | 8.5 |
| August | 8 |
| September | 7.5 |
| October | 6.5 |
| November | 6 |
| December | 6.5 |
Coastal Influence
Irvine is close to the coast, which influences its wind patterns.
The coastal breeze helps to moderate temperatures, making warm days feel cooler. This phenomenon is felt in both summer and winter.
The combination of mild temperatures and gentle winds makes Irvine a comfortable place to live year-round. The wind rarely causes any severe weather conditions.
The wind conditions in the city contribute to its favorable climate, which is appreciated by both residents and visitors.
Average Air Quality in Irvine, California
The average air quality in Irvine has improved significantly over the years. This is largely due to amendments made to the Clean Air Act in 1990.
Irvine’s Air Quality Index (AQI) used to average around 68, which is classified as “moderate”. Recent data shows an average AQI of 41, categorized as “good”, meaning the air is relatively clean.
Historical Data:
- 2000: Moderate AQI – 68
- 2019: Good AQI – 41
For current data, check the Irvine Air Quality Index.
Pollutants:
- PM2.5: Regular monitoring shows lower levels of fine particulate matter, which is a notable improvement.
- Nitrogen Dioxide (NO2): Historical data from NASA indicates a decline in monthly averaged NO2 levels over the years, reflecting better air conditions.
Weather patterns such as wind and temperature also impact air quality.
Generally, dry conditions and wind from the ocean help maintain cleaner air.
Monitoring AQI can help residents make healthier lifestyle choices daily.
Tools for real-time tracking are available on platforms like AccuWeather.
Tracking such changes and patterns helps understand how weather and regulations affect air quality in Irvine.
Topography of Irvine, California
Irvine, located in Orange County, is positioned at a longitude of -117.795 and a latitude of 33.6839.
This places the city in the southern part of California, in close proximity to the Pacific Ocean.
The city’s elevation varies but generally stands at about 56 feet above sea level.
This contributes to its mild climate and pleasant weather year-round.
Geographical Features:
- Hills: Irvine is surrounded by several hills and small mountain ranges, which offer scenic views and outdoor activities.
- Beaches: Although not directly on the coast, the nearby beaches are easily accessible for residents and visitors, enhancing the city’s appeal.
- Parks: Numerous parks and green spaces are scattered throughout the city, making it a haven for outdoor enthusiasts.
Table – Key Topographical Data
| Feature | Description |
|---|---|
| County | Orange County |
| Longitude | -117.795 |
| Latitude | 33.6839 |
| Elevation | ~56 feet above sea level |
| Mountains | Surrounding small mountain ranges |
| Beaches | Nearby Pacific coastline |
Natural Landmarks:
- San Joaquin Hills are notable natural landmarks, providing a backdrop to the city.
- Woodbridge Community is known for its lakes and waterfront areas, adding to the city’s charm.
Extreme Weather Events that Occur in Irvine, California
Irvine, California experiences a variety of extreme weather events throughout the year.
Heatwaves are a notable extreme weather event.
Temperatures can soar above 100°F during summer months, especially in July and August.
Santa Ana Winds are another significant weather event.
These hot, dry winds blow from the inland deserts towards the coast, elevating the risk of wildfires and causing sudden temperature spikes.
The region faces occasional heavy rainfall and flooding during the winter months.
Though rare, storms can bring several inches of rain over a short period, leading to localized flooding.
Wildfires are a persistent threat, particularly during the fall months.
Dry conditions and Santa Ana Winds contribute to the rapid spread of fires, affecting air quality and sometimes necessitating evacuations.
Infrequently, earthquakes may also affect the area, as California lies on several fault lines.
While not weather-related, their impact on emergency preparedness is significant.
Best Time of the Year to Visit Irvine, California
Irvine, California enjoys a Mediterranean climate with mild winters and warm, dry summers.
Visitors can plan trips based on their preference for weather and activities, with pleasant temperatures year-round making it a versatile travel destination.
What is Irvine, California Like in Spring
Spring is a delightful season in Irvine.
From March through May, temperatures range from the high 50s to the mid-70s Fahrenheit.
The days are longer, culminating in more daylight for activities. Rainfall is minimal, ensuring sunny days for outdoor fun.
The blooming flowers in local parks, like Bommer Canyon and Mason Regional Park, attract many nature enthusiasts.
This period is ideal for hiking, picnicking, and other outdoor adventures.
With less tourist congestion compared to summer, spring offers both beautiful scenery and enjoyable weather.
What is Irvine, California Like in Summer
Summers in Irvine, from June to August, are warm and dry.
Average temperatures hover between the mid-60s at night to the mid-80s during the day.
Despite the heat, it rarely becomes uncomfortably hot due to the coastal breeze.
The longest day of the year falls in June, providing ample daylight for beach trips to Laguna Beach or Newport Beach, and activities like surfing or paddleboarding.
Festivals and local events are frequent, making summer vibrant.
However, this is also peak tourist season, so be prepared for larger crowds.
What is Irvine, California Like in Fall
Fall in Irvine, from September to November, is characterized by mildly warm temperatures.
Highs range from the mid-70s to low 80s Fahrenheit, and the nights become cooler.
This season witnesses fewer tourists, providing a more relaxed atmosphere.
This is an excellent time for visiting attractions like the Orange County Great Park or attending seasonal festivals such as the Irvine Global Village Festival.
The pleasant weather makes fall a comfortable season for exploring the city’s outdoor and cultural offerings without the summer crowds.
What is Irvine, California Like in Winter
Winter in Irvine, from December to February, is mild and slightly wetter.
Average temperatures range from the low 40s at night to the mid-60s during the day.
Rainfall is higher compared to other seasons, but it is still relatively low, averaging about 13 inches annually.
Despite being the shortest day of the year, December still offers sufficient daylight for various activities.
Winters are ideal for visiting indoor attractions, such as museums or theaters, and enjoying the festive holiday events in the area.
Travelers seeking a mild winter escape will find Irvine pleasant and inviting.