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Garden Grove, CA Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Garden Grove, CA?
Garden Grove, CA gets 12.5 in of precipitation a year over about 35 rainy days. August is the warmest month (average high 86°F) and January the coldest (average low 48°F).
Semi-arid climate
Garden Grove, CA has hot summers and warm winters. Daytime highs range from about 70°F in December to 86°F in August. February is usually the wettest month. The most comfortable time to visit is typically January, March to June, and November to December, when daytime highs sit near 74°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 48° | 70° |
| Spring | Mar–May | 54° | 74° |
| Summer | Jun–Aug | 63° | 83° |
| Autumn | Sep–Nov | 58° | 80° |
How much rain does Garden Grove get?
Garden Grove gets 12.5 in of precipitation in an average year, spread over about 35 days with measurable rain. That is fewer rainy days than 90% of the US.
February is the wettest month, with 3.2 in. August is the driest, with 0.0 in. February has the most rainy days, about 7.
The longest dry spell in the last five years lasted 111 days, to September 8, 2022.
From September 2025 to August 2026 Garden Grove got 15.1 in of rain, against a normal of 12.5 in for those months. November 2025 had the most, with 5.4 in.
See where Garden Grove ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in California.
Garden Grove weather by month
Garden Grove weather in January
In January, Garden Grove averages a high of 70°F and a low of 48°F. It gets 2.9 in of precipitation over about 6 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The January record high is 96°F (2003) and the record low is 16°F (1989). January is one of the most comfortable months to visit.
Garden Grove weather in February
In February, Garden Grove averages a high of 70°F and a low of 49°F. It gets 3.2 in of precipitation over about 7 rainy days. Estimated sunshine is 60% of daylight hours, derived from ERA5 cloud cover. The February record high is 95°F (2016) and the record low is 22°F (1989).
Garden Grove weather in March
In March, Garden Grove averages a high of 72°F and a low of 51°F. It gets 1.7 in of precipitation over about 5 rainy days. Estimated sunshine is 52% of daylight hours, derived from ERA5 cloud cover. The March record high is 100°F (2026) and the record low is 36°F (1971). March is one of the most comfortable months to visit.
Garden Grove weather in April
In April, Garden Grove averages a high of 74°F and a low of 54°F. It gets 0.8 in of precipitation over about 3 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The April record high is 104°F (1989) and the record low is 34°F (1975). April is one of the most comfortable months to visit.
Garden Grove weather in May
In May, Garden Grove averages a high of 76°F and a low of 58°F. It gets 0.3 in of precipitation over about 2 rainy days. Estimated sunshine is 48% of daylight hours, derived from ERA5 cloud cover. The May record high is 105°F (2004) and the record low is 39°F (1971). May is one of the most comfortable months to visit.
Garden Grove weather in June
In June, Garden Grove averages a high of 79°F and a low of 61°F. It gets 0.1 in of precipitation over about 1 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The June record high is 109°F (1981) and the record low is 49°F (1971). June is one of the most comfortable months to visit.
Garden Grove weather in July
In July, Garden Grove averages a high of 83°F and a low of 64°F. It gets 0.0 in of precipitation over about 1 rainy days. Estimated sunshine is 71% of daylight hours, derived from ERA5 cloud cover. The July record high is 114°F (2018) and the record low is 50°F (2005).
Garden Grove weather in August
In August, Garden Grove averages a high of 86°F and a low of 65°F. It gets 0.0 in of precipitation over about 0 rainy days. Estimated sunshine is 71% of daylight hours, derived from ERA5 cloud cover. The August record high is 106°F (2020) and the record low is 52°F (1993).
Garden Grove weather in September
In September, Garden Grove averages a high of 85°F and a low of 63°F. It gets 0.1 in of precipitation over about 1 rainy days. Estimated sunshine is 68% of daylight hours, derived from ERA5 cloud cover. The September record high is 113°F (2024) and the record low is 51°F (1975).
Garden Grove weather in October
In October, Garden Grove averages a high of 81°F and a low of 59°F. It gets 0.5 in of precipitation over about 2 rainy days. Estimated sunshine is 66% of daylight hours, derived from ERA5 cloud cover. The October record high is 106°F (2015) and the record low is 37°F (1971).
Garden Grove weather in November
In November, Garden Grove averages a high of 75°F and a low of 52°F. It gets 0.8 in of precipitation over about 3 rainy days. Estimated sunshine is 66% of daylight hours, derived from ERA5 cloud cover. The November record high is 101°F (2010) and the record low is 36°F (1994). November is one of the most comfortable months to visit.
Garden Grove weather in December
In December, Garden Grove averages a high of 70°F and a low of 48°F. It gets 2.2 in of precipitation over about 6 rainy days. Estimated sunshine is 48% of daylight hours, derived from ERA5 cloud cover. The December record high is 92°F (1979) and the record low is 24°F (1988). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in Garden Grove
July is the sunniest month in Garden Grove, with estimated sunshine of 71% of daylight hours from ERA5 cloud cover. May is the cloudiest, at 48%. The annual cloud-cover estimate is 60% of daylight hours; it is not a measurement of sunshine duration. Garden Grove is sunnier than 85% of the US.
Humidity peaks in May at 72% and is lowest in November at 59%.
Garden Grove has about 26 days a year above 90°F. Garden Grove is cooler than 53% of the US.
Thunderstorms occur on about 2 days a year.
See where Garden Grove ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
Garden Grove weather records
These records cover SANTA ANA FIRE STN during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Garden Grove station is 114°F, on July 6, 2018. The coldest is 16°F, on January 12, 1989.
The wettest day in the available station history brought 3.5 in of precipitation, on December 6, 1997.
29 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.6°F per decade since 1970.
The best time to visit Garden Grove
The most comfortable time to visit is typically January, March to June, and November to December, when daytime highs sit near 74°F.
Winter (December–February) is warm, with average highs around 70°F and lows near 48°F.
Spring (March–May) is warm, with average highs around 74°F and lows near 54°F.
Summer (June–August) is hot, with average highs around 83°F and lows near 63°F. It can feel humid.
Autumn (September–November) is warm, with average highs around 80°F and lows near 58°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 48° | 70° | 2.9 in | 6 | 68% | 53% | 96° | 16° |
| February | 49° | 70° | 3.2 in | 7 | 60% | 60% | 95° | 22° |
| March | 51° | 72° | 1.7 in | 5 | 68% | 52% | 100° | 36° |
| April | 54° | 74° | 0.82 in | 3 | 68% | 55% | 104° | 34° |
| May | 58° | 76° | 0.29 in | 2 | 72% | 48% | 105° | 39° |
| June | 61° | 79° | 0.08 in | 1 | 70% | 56% | 109° | 49° |
| July | 64° | 83° | 0.03 in | 1 | 70% | 71% | 114° | 50° |
| August | 65° | 86° | 0.00 in | 0 | 70% | 71% | 106° | 52° |
| September | 63° | 85° | 0.12 in | 1 | 70% | 68% | 113° | 51° |
| October | 59° | 81° | 0.50 in | 2 | 67% | 66% | 106° | 37° |
| November | 52° | 75° | 0.79 in | 3 | 59% | 66% | 101° | 36° |
| December | 48° | 70° | 2.2 in | 6 | 67% | 48% | 92° | 24° |
Station: SANTA ANA FIRE STN, 8 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Garden Grove climate questions
How much rain does Garden Grove get?
Garden Grove gets 12.5 in of precipitation in an average year, over about 35 rainy days.
What is the wettest month in Garden Grove?
February is the wettest month in Garden Grove, with 3.2 in. August is the driest, with 0.0 in.
How many rainy days does Garden Grove have a year?
Garden Grove has about 35 days with measurable rain in an average year. February has the most, about 7.
What is the hottest month in Garden Grove?
August is the warmest month in Garden Grove, with an average high of 86°F.
What is the coldest month in Garden Grove?
January is the coldest month in Garden Grove, with an average low of 48°F.
What is the record high temperature in Garden Grove?
Within the available 1970–2026 station history, the record high at the Garden Grove station is 114°F, set on July 6, 2018. The record low is 16°F, on January 12, 1989.
What is the sunniest month in Garden Grove?
July is the sunniest month in Garden Grove, with estimated sunshine of 71% of daylight hours from ERA5 cloud cover. May is the cloudiest.
What is the best time to visit Garden Grove?
The most comfortable time to visit is typically January, March to June, and November to December, when daytime highs sit near 74°F.