Climate and monthly weather forecast
Santa Rosa, Argentina

Santa Rosa, located in Argentina, experiences a predominately humid subtropical climate with no dry season, a classification known as Cfa according to the Köppen climate classification. A survey of the climatological data reveals a wide range of weather conditions throughout the year, characterised by significant changes in temperature, relative humidity, and precipitation totals.

The average high temperatures fluctuate across the year, from a peak of 31.4°C (88.5°F) in January, gradually decreasing to a low of 14.7°C (58.5°F) in June and July, before rising again towards the year end. Correspondingly, average low temperatures range from 15.5°C (59.9°F) in January to a minimum of 1.9°C (35.4°F) in July. Relative humidity exhibits minor variability, with the lowest value of 58% recorded in January and December, and the peak of 79% in June.

Precipitation in Santa Rosa varies widely. The months of December and January experience 74mm (2.91") and 75mm (2.95") respectively, while March witnesses significantly more rainfall, at 92mm (3.62"). There is a noticeable drop as the months progress, reaching annual lows of 16mm (0.63") and 19mm (0.75") in June and July, before slightly increasing again towards the year end. The number of rainfall days follows a similar pattern, peaking in December and January with 9 days.

Lastly, daylight and sunshine hours also exhibit a yearly cycle. The longest days, with 14.6 hours of daylight, are in December, while the shortest days, with 9.7 hours of daylight, come in June. Sunshine hours range from a high of 10.3 hours a day around January to a low of 4.4 hours by June.

Considering the climatic conditions, the best time to visit Santa Rosa would be between November and February. During these months, the weather is relatively warm with average high temperatures ranging from 26.6°C (79.9°F) to 31.4°C (88.5°F). While these months do have slightly more rain, with precipitation ranging from 74mm (2.91") in December to 101mm (3.98") in November, they also display the highest number of sunshine hours. November to February sees daily sunshine durations from 9.1 hours to 10.3 hours.

Conversely, the worst time to visit Santa Rosa would be between May and August. These are the coldest months in the city, with average low temperatures from 1.9°C (35.4°F) in July up to 5.3°C (41.5°F) in May, and average high temperatures as low as 14.7°C (58.5°F) in July. There is greater rainfall accumulation from August onward, with totals starting from 23mm (0.91") in August and ramping up to 70mm (2.76") in October. Additionally, the days are also short during these months, with daylight hours averaging between 9.7 hours and 10.8 hours.

The Spring season in Santa Rosa, spanning from September to November, ushers in a rise in temperatures from 18.5°C (65.3°F) to 26.6°C (79.9°F) in the high range, and an increment from 5°C (41°F) to 11.6°C (52.9°F) in the low range. There is a gradual increase in rainfall, starting from 42mm (1.65") in September to 101mm (3.98") in November. Similarly, daylight hours increase from 11.9 to 14.1, as do the hours of sunshine, from 6.2 to 9.1.

In Summer from December to February, Santa Rosa experiences its warmest conditions. High temperatures are between 29.9°C (85.8°F) and 31.4°C (88.5°F), with lows of 14.5°C (58.1°F) to 15.5°C (59.9°F). Despite being the wettest time of the year, rainfall amounts remain relatively constant around 74mm (2.91") to 94mm (3.7"). The days are long and ripe for outdoor activities, with daylight hours from 14.1 to 14.6 and sunshine durations from 9.1 to 10.3 hours.

During Autumn, from March to May, there is a significant drop in temperature, with highs decreasing from 26.6°C (79.9°F) in March to 18.5°C (65.3°F) in May, and lows from 12.3°C (54.1°F) to 5.3°C (41.5°F). The rainfall amount peaks at 92mm (3.62") in March before it starts dropping to 28mm (1.1") by May. Meanwhile, daylight hours reduce from 12.3 to 10.2, as do sunshine hours from 7.3 to 5.1.

Winter in Santa Rosa brings the coldest conditions, with average high temperatures dropping to a low of 14.7°C (58.5°F) in June and July. Corresponding lows stabilise around 2.3°C (36.1°F) to 1.9°C (35.4°F) in the same period. Despite these cold temperatures, it is the driest period of the year with precipitation totals dropping as low as 16mm (0.63") and 19mm (0.75") in June and July, respectively. Daylight hours are at their shortest, maintaining between 9.7 and 10.2, with sunshine hours also maintaining a low, from 4.4 to 4.7.

Santa Rosa observes a warm, summer climate in January. The city experiences the year's highest average temperature, with a peak of 31.4°C (88.5°F). As this month sees 14.3 hours of daylight providing ample opportunity for various outdoor activities. Weather in January »

There is a slight dip in temperature when we move from January to February in Santa Rosa. The peak temperature touches 30.3°C (86.5°F) decorating the city with a pleasant and enjoyable summer feel. Outdoor enthusiasts can take advantage of 13.4 hours of daylight while exploring the city. Weather in February »

As Santa Rosa marches into March, a slight relief from summer's warmth is felt with a dip in peak temperature to 26.6°C (79.9°F). Visitors can anticipate fewer hours of daylight in comparison to February, dropping to 12.3 hours. Weather in March »

Stepping into April, Santa Rosa experiences further cooling, witnessing a marked decrease in maximum temperature to 22.6°C (72.7°F). This month signals the city's transition towards winter, with diminishing daylight hours standing at 11.1 hours. Weather in April »

Santa Rosa welcomes the onset of winter in May. The mercury drops further, causing a significant fall in temperature and registering a noticeable change in weather. Expect less rain compared with previous months, with an accumulation of 28mm (1.1") over 5 days. Weather in May »

The winter season solidifies its grasp over Santa Rosa in June. The temperature continues to drop, bringing cooler days and nippy nights to the city. It receives the minimum rainfall of the year, accumulating 16mm (0.63") over a span of 4 days. Weather in June »

July stands as the coldest month in Santa Rosa, registering an average low temperature of 1.9°C (35.4°F). The rainfall slightly rises to 19mm (0.75"), spread over 4 days, experiencing a marginal increase from June. Despite having a winter bearing, July rewards with 9.9 hours of daylight, hinting at a gentle hint of spring. Weather in July »

As Santa Rosa steps into August, there is a noticeable transition from winter to spring. The minimal increase in temperature brings with it a lukewarm introduction to the approaching spring. With an increase in daylight hours to 10.8 and a slight increase in sunshine hours to 5.8, August marks the beginning of brighter and longer days. Weather in August »

In September, Santa Rosa begins to bid its farewell to winter and opens its arm to embrace spring's arrival. The weather becomes noticeably warmer, bidding adieu to the cold winter days. Rainfall escalates compared to August, leaping to 42mm (1.65") across 5 days. Weather in September »

October in Santa Rosa is characterized by milder and pleasant days, indicative of consistent spring weather. The city gets drenched in intense rainfall, accumulating 70mm (2.76") over 9 days. Daylight stretches to 13 hours, accommodating more outdoor activities. Weather in October »

Serving as a bridge between spring and summer, November in Santa Rosa experiences amplified heat with no distinctive chill of spring. It sees the most substantial rainfall of the year, amounting to 101mm (3.98") over a span of 8 days. Weather in November »

December in Santa Rosa signals the commencement of the summer season. The winter chills are left behind as temperatures start to soar, warming up the city with summer's radiance. Rainfall levels retain a high record, identical to November, amounting to 94mm (3.7") spread over 9 days. Weather in December »