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Rosarito, Baja California Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Rosarito, Baja California?
Rosarito, Baja California gets 218 mm of precipitation a year over about 21 rainy days. August is the warmest month (average high 24°C) and December the coldest (average low 8°C).
Semi-arid climate
Rosarito, Baja California has warm summers and mild winters. Daytime highs range from about 19°C in December to 24°C in August. February is usually the wettest month. The most comfortable time to visit is typically January and March to December, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 9° | 19° |
| Spring | Mar–May | 12° | 19° |
| Summer | Jun–Aug | 17° | 23° |
| Autumn | Sep–Nov | 14° | 23° |
How much rain does Rosarito get?
Rosarito gets 218 mm of precipitation in an average year, spread over about 21 days with measurable rain. That is fewer rainy days than 95% of the US.
February is the wettest month, with 53 mm. August is the driest, with 1 mm. February has the most rainy days, about 4.
The longest dry spell in the last five years lasted 53 days, to August 9, 2025.
From October 2025 to September 2026 Rosarito got 96 mm of rain, against a normal of 218 mm for those months. January 2026 had the most, with 43 mm.
Rosarito weather by month
Rosarito weather in January
In January, Rosarito averages a high of 19°C and a low of 9°C. It gets 43 mm of precipitation over about 4 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The January record high is 30°C (1976) and the record low is -3°C (1971). January is one of the most comfortable months to visit.
Rosarito weather in February
In February, Rosarito averages a high of 19°C and a low of 9°C. It gets 53 mm of precipitation over about 4 rainy days. Estimated sunshine is 59% of daylight hours, derived from ERA5 cloud cover. The February record high is 34°C (2016) and the record low is 1°C (1975).
Rosarito weather in March
In March, Rosarito averages a high of 19°C and a low of 11°C. It gets 47 mm of precipitation over about 4 rainy days. Estimated sunshine is 52% of daylight hours, derived from ERA5 cloud cover. The March record high is 30°C (2014) and the record low is 1°C (1971). March is one of the most comfortable months to visit.
Rosarito weather in April
In April, Rosarito averages a high of 19°C and a low of 12°C. It gets 15 mm of precipitation over about 2 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The April record high is 30°C (2009) and the record low is 5°C (1976). April is one of the most comfortable months to visit.
Rosarito weather in May
In May, Rosarito averages a high of 20°C and a low of 14°C. It gets 3 mm of precipitation over about 1 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The May record high is 29°C (2014) and the record low is 6°C (2011). May is one of the most comfortable months to visit.
Rosarito weather in June
In June, Rosarito averages a high of 21°C and a low of 16°C. It gets 2 mm of precipitation over about 0 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The June record high is 32°C (1980) and the record low is 8°C (1971). June is one of the most comfortable months to visit.
Rosarito weather in July
In July, Rosarito averages a high of 23°C and a low of 18°C. It gets 8 mm of precipitation over about 0 rainy days. Estimated sunshine is 60% of daylight hours, derived from ERA5 cloud cover. The July record high is 33°C (2015) and the record low is 12°C (2011). July is one of the most comfortable months to visit.
Rosarito weather in August
In August, Rosarito averages a high of 24°C and a low of 18°C. It gets 1 mm of precipitation over about 0 rainy days. Estimated sunshine is 65% of daylight hours, derived from ERA5 cloud cover. The August record high is 33°C (2008) and the record low is 9°C (2010). August is one of the most comfortable months to visit.
Rosarito weather in September
In September, Rosarito averages a high of 24°C and a low of 17°C. It gets 4 mm of precipitation over about 1 rainy days. Estimated sunshine is 66% of daylight hours, derived from ERA5 cloud cover. The September record high is 35°C (2008) and the record low is 9°C (2013). September is one of the most comfortable months to visit.
Rosarito weather in October
In October, Rosarito averages a high of 23°C and a low of 14°C. It gets 11 mm of precipitation over about 1 rainy days. Estimated sunshine is 67% of daylight hours, derived from ERA5 cloud cover. The October record high is 37°C (2017) and the record low is 2°C (1971). October is one of the most comfortable months to visit.
Rosarito weather in November
In November, Rosarito averages a high of 22°C and a low of 11°C. It gets 20 mm of precipitation over about 2 rainy days. Estimated sunshine is 66% of daylight hours, derived from ERA5 cloud cover. The November record high is 37°C (1976) and the record low is -1°C (2007). November is one of the most comfortable months to visit.
Rosarito weather in December
In December, Rosarito averages a high of 18°C and a low of 8°C. It gets 11 mm of precipitation over about 3 rainy days. Estimated sunshine is 54% of daylight hours, derived from ERA5 cloud cover. The December record high is 31°C (2016) and the record low is -1°C (1978). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in Rosarito
October is the sunniest month in Rosarito, with estimated sunshine of 67% of daylight hours from ERA5 cloud cover. May is the cloudiest, at 50%. The annual cloud-cover estimate is 59% of daylight hours; it is not a measurement of sunshine duration. Rosarito is sunnier than 84% of the US.
Humidity peaks in July at 83% and is lowest in February at 67%.
Wind averages 11 km/h over the year, and May is the windiest month at 13 km/h.
Rosarito has about 3 days a year above 32°C. Rosarito is cooler than 97% of the US.
Rosarito weather records
These records cover IMPERIAL BEACH REAM FLD NAS during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Rosarito station is 37°C, on November 4, 1976. The coldest is -3°C, on January 7, 1971.
The wettest day in the available station history brought 113 mm of precipitation, on February 2, 1988.
27 all-time records have been set at the station since 1970.
The best time to visit Rosarito
The most comfortable time to visit is typically January and March to December, when daytime highs sit near 21°C.
Winter (December–February) is mild, with average highs around 19°C and lows near 9°C.
Spring (March–May) is mild, with average highs around 19°C and lows near 12°C.
Summer (June–August) is warm, with average highs around 23°C and lows near 17°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 23°C and lows near 14°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Wind | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|---|
| January | 9° | 19° | 43 mm | 4 | 11 km/h | 71% | 56% | 30° | -3° |
| February | 9° | 19° | 53 mm | 4 | 12 km/h | 67% | 59% | 34° | 1° |
| March | 11° | 19° | 47 mm | 4 | 12 km/h | 76% | 52% | 30° | 1° |
| April | 12° | 19° | 15 mm | 2 | 13 km/h | 77% | 55% | 30° | 5° |
| May | 14° | 20° | 2.5 mm | 1 | 13 km/h | 78% | 50% | 29° | 6° |
| June | 16° | 21° | 2.0 mm | 0 | 12 km/h | 80% | 56% | 32° | 8° |
| July | 18° | 23° | 8.4 mm | 0 | 12 km/h | 83% | 60% | 33° | 12° |
| August | 18° | 24° | 0.8 mm | 0 | 12 km/h | 83% | 65% | 33° | 9° |
| September | 17° | 24° | 3.6 mm | 1 | 10 km/h | 80% | 66% | 35° | 9° |
| October | 14° | 23° | 11 mm | 1 | 10 km/h | 76% | 67% | 37° | 2° |
| November | 11° | 22° | 20 mm | 2 | 10 km/h | 67% | 66% | 37° | -1° |
| December | 8° | 18° | 11 mm | 3 | 11 km/h | 71% | 54% | 31° | -1° |
Station: IMPERIAL BEACH REAM FLD NAS, 24 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.
Rosarito climate questions
How much rain does Rosarito get?
Rosarito gets 218 mm of precipitation in an average year, over about 21 rainy days.
What is the wettest month in Rosarito?
February is the wettest month in Rosarito, with 53 mm. August is the driest, with 1 mm.
How many rainy days does Rosarito have a year?
Rosarito has about 21 days with measurable rain in an average year. February has the most, about 4.
What is the hottest month in Rosarito?
August is the warmest month in Rosarito, with an average high of 24°C.
What is the coldest month in Rosarito?
December is the coldest month in Rosarito, with an average low of 8°C.
What is the record high temperature in Rosarito?
Within the available 1970–2026 station history, the record high at the Rosarito station is 37°C, set on November 4, 1976. The record low is -3°C, on January 7, 1971.
What is the sunniest month in Rosarito?
October is the sunniest month in Rosarito, with estimated sunshine of 67% of daylight hours from ERA5 cloud cover. May is the cloudiest.
What is the best time to visit Rosarito?
The most comfortable time to visit is typically January and March to December, when daytime highs sit near 21°C.