The climate of Rosario
Rosario, located in
Argentina, experiences a Humid Subtropical climate with no dry season, tracked as 'Cfa' within the Köppen climate classification system. The city experiences considerable weather variation throughout the year, with changes in temperature, humidity, rainfall, and sunshine hours evidencing this.
Throughout the year, high temperatures range from 15.7°C (60.3°F) in
July to 33.4°C (92.1°F) in
January, showcasing the summer's intensity. Low temperatures are not too severe, fluctuating between 7.5°C (45.5°F) in July and 18.8°C (65.8°F) in January. The relative humidity in the city varies from 52% in January to a higher 75% in
May, typically when the air tends to feel most humid.
Rainfall in Rosario ranges from a low of 16mm (0.63") in
June to a high of 72mm (2.83") in
December. The number of rainy days varies from as low as 4.8 in June to a high of 10 in
October. December brings the maximum rainfall, with an average of 9.1 rainy days. The UV index ranges from a low of 4 from
April to
September to a high of 7 in January, indicating the need for protection from potential sun exposure.
Both wind speed and gusts are generally mild, with wind traveling between 10.2km/h (6.3mph) to 13km/h (8.1mph) and gusts with a maximum speed of 21.3km/h (13.2mph) in
August. Cloud cover in Rosario ranges from a low of 17% in January to a high of 37% in May.
The best time to visit Rosario
Considering the weather elements and typical visitor preferences, the best time to visit
Rosario is between
April and
June. During these months, the region experiences mild weather and may be more attractive for outdoor activities. The temperatures are moderate, ranging from the high of 28.3°C (82.9°F) to 19.6°C (67.3°F), with a low between 15.6°C (60.1°F) and 11.7°C (53.1°F).
Daily sunshine hours are reasonable, between 7.4 hours to 8.9 hours, providing ample time for sightseeing. Relative humidity does increse from 62% to 75%, indicative of an uptick in moisture. Those sensitive to humidity should be prepared for these conditions.
The worst time to visit Rosario
The summer months of
January and
February might be quite challenging for some visitors due to the high temperatures that can reach up to 33.4°C (92.1°F) accompanied by relatively higher humidity levels of 52% to 58%. These conditions could result in discomfort, especially for people not accustomed to such weather.
During
December, the city receives the maximum rainfall of 72mm (2.83") over about 9.1 days. This measure could disrupt outdoor activities and sightseeing schedules, making December less suitable for tourists who prefer to stay dry.
Spring weather in Rosario
The spring season in
Rosario, occurring from
September to
November, is filled with warm, sunny weather. Daytime high temperatures range from 20.6°C (69.1°F) to 28.5°C (83.3°F), ensuring pleasant weather for outdoor activities. However, evenings are cooler with a range between 9.7°C (49.5°F) to 15.3°C (59.5°F).
The city enjoys around eight hours of sunshine per day during spring, and the UV index is usually at a safe level of around 5 during
October and 6 in November. Tourists during this season should expect around 34mm (1.34") to 53mm (2.09") of rain spread over about 7.5 to 8.9 days.
Summer weather in Rosario
Summer in
Rosario, spanning from
December to
February, is characterized by high temperatures and frequent rainfall. The daytime high temperature can soar up to 33.4°C (92.1°F) in
January, and night temperatures remain warm between 17.5°C (63.5°F) to 18.8°C (65.8°F).
Rainfall is a common occurrence during summer months with approximately 45mm (1.77") to 72mm (2.83") falling over 7.8 to 9.1 days. Despite the rainfall, Rosario enjoys a significant amount of sunshine, averaging between 11.1 hours to 9.5 hours per day.
Autumn weather in Rosario
Autumn in
Rosario, which extends from
March to
May, is mild and characterized by decreasing temperatures. With daytime highs moving from 24.5°C (76.1°F) to 19.6°C (67.3°F) and low temperatures decreasing from 13.8°C (56.8°F) to 11.7°C (53.1°F), the season offers relief from the high summer heat.
Rainfall decreases from 35mm (1.38") in March to 23mm (0.91") in May spread over approximately seven to eight rainy days. While the hours of sunshine gradually lessen from 8.4 hours to 7.4 hours, the level of UV radiation also declines to a safer zone during this season.
Winter weather in Rosario
Winter season in
Rosario, which stretches from
June to
August, witnesses the lowest temperatures of the year. The highs range from 15.7°C (60.3°F) to 18.8°C (65.8°F) while the lows vary between 7.5°C (45.5°F) to 8.7°C (47.7°F).
Despite being the coldest part of the year, Rosario's winter is less rainy, with precipitation levels declining to 16mm (0.63") in June, then slightly increasing to 21mm (0.83") in
July and 28mm (1.1") in August. Over these months, the people of Rosario experience the longest nights but still manage to enjoy roughly nine hours of daily sunshine. Nonetheless, it's worth noting that the strength of UV radiation remains consistently lower at 4.
Weather in January
The year in
Rosario starts off with
January being one of the warmest months, with daily highs peaking at 33.4°C (92.1°F). Typically, the day extends to 14 hours of daylight filled primarily with sunshine. Sunlight is radiated for nearly two-thirds of the day, generating a UV index of 7, necessitating appropriate protective measures for outdoor activities.
Weather in January »Weather in February
As the atmosphere settles following the heat wave of
January,
February offers slightly cooler weather conditions in
Rosario. Compared to its predecessor, February exhibits a slight dip in temperatures and comes in a bit windy with wind speeds maxing out at 11km/h (6.8mph).
Weather in February »Weather in March
In
March, the weather takes a gentle turn towards mild conditions as
Rosario inches closer to autumn. The city witnesses a further drop in temperatures and also in rainfall quantities. Notably, the length of the day drops to about 12.3 hours, signalling the shorter days of the year ahead.
Weather in March »
Weather in April
April is when
Rosario firmly steps into autumn. The weather becomes noticeably cooler, and the city experiences a consistent increase in relative humidity. Accompanying the cool breeze are showers, though the volume of rain is lesser compared to the initial months of the year.
Weather in April » Weather in May
May signals the onset of cooler months in
Rosario, as both day and night temperatures continue their descent. Relative to the previous months, the daylight hours keep shrinking but the city still witnesses about 10.4 hours of day time.
Weather in May » Weather in June
June presents
Rosario with the typical winter weather, characterized by lower temperatures and shorter days. The wind speed hits a new high this year, reaching up to 12.8km/h (8mph), adding to the perceived cold. As a result of the shortened days, there’s a decline in the number of sunshine days.
Weather in June »
Weather in July
July depicts the coldest weather in
Rosario with temperatures barely making it above 15.7°C (60.3°F), a significant drop from earlier months. Even winters in Rosario are not devoid of sunshine, as the town still manages to get 7.5 hours of sunshine.
Weather in July » Weather in August
August presents a slightly warmer
Rosario as the city slowly shakes off the winter chill. The temperatures begin to rise and the length of the day starts to increase as well. The month overall remains dry, with only a moderate amount of rainfall.
Weather in August » Weather in September
In
September, the tables are turned as
Rosario transitions to a warmer climate signalling the beginning of spring. Relative to the previous months, changes in temperature and rainfall quantities can be observed. The length of the day inches closer to the 12-hour mark, yielding longer sunny periods.
Weather in September »
Weather in October
October in
Rosario is pleasantly warm, and the city finds itself experiencing longer days and shorter nights. Comparatively warmer than
September, October still enjoys a substantial amount of sunlight. The rainfall volume experiences a slight increase, adding to the favourable weather conditions.
Weather in October » Weather in November
November ushers in a hotter climate in
Rosario with notable rise in temperatures. It also sees a significant boost in daylight hours, leading to more sunny days. This month also witnesses a substantial increase in both the volume and frequency of rainfall.
Weather in November » Weather in December
December brings full-blown summer to
Rosario with the hottest weather of the year featuring temperatures reaching 31.7°C (89.1°F). The longest days of the year are recorded in this month, with day time reaching a maximum of 14.3 hours.
Weather in December » [Resources]