1. WeatherSpark.com
  2. Argentina
  3. Santa Fe

Climate and Average Weather Year Round at Rosario International Airport Argentina

At Rosario International Airport, the summers are warm, humid, wet, and mostly clear and the winters are short, cold, and partly cloudy. Over the course of the year, the temperature typically varies from 42°F to 87°F and is rarely below 30°F or above 95°F.

Based on the tourism score, the best times of year to visit Rosario International Airport for warm-weather activities are from late January to mid April and from early October to early January.

Climate at Rosario International Airport

hotwarmcomfortablecoolcomfortablewarmJanFebMarAprMayJunJulAugSepOctNovDecNowNow74%74%52%52%clearovercastprecipitation: 5.4 inprecipitation: 5.4 in0.8 in0.8 inmuggy: 50%muggy: 50%0%0%drydrytourism score: 7.0tourism score: 7.03.03.0
Rosario International Airport weather by month. Click on each chart for more information.

Average Temperature at Rosario International Airport

The hot season lasts for 3.5 months, from November 25 to March 9, with an average daily high temperature above 82°F. The hottest day of the year is January 14, with an average high of 87°F and low of 67°F.

The cool season lasts for 2.9 months, from May 22 to August 19, with an average daily high temperature below 66°F. The coldest day of the year is July 19, with an average low of 42°F and high of 61°F.

Average High and Low Temperature at Rosario International Airport

Average High and Low Temperature at Rosario International AirporthothotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJul 1961°FJul 1961°FJan 1487°FJan 1487°F42°F42°F67°F67°FNov 2582°FNov 2582°FMar 982°FMar 982°FMay 2266°FMay 2266°FAug 1966°FAug 1966°F61°F61°F63°F63°F48°F48°F45°F45°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature at Rosario International Airport

Average Hourly Temperature at Rosario International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldcoldcoldcoolcomfortablecomfortablewarmwarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Whyalla, Australia (7,736 miles away) and Raworth, Australia (7,443 miles) are the far-away foreign places with temperatures most similar to Rosario International Airport (view comparison).

Compare Rosario International Airport to another city:

Clouds

At Rosario International Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Rosario International Airport begins around August 28 and lasts for 8.0 months, ending around April 27. On February 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.

The cloudier part of the year begins around April 27 and lasts for 4.0 months, ending around August 28. On May 31, the cloudiest day of the year, the sky is overcast or mostly cloudy 48% of the time, and clear, mostly clear, or partly cloudy 52% of the time.

Cloud Cover Categories at Rosario International Airport

Cloud Cover Categories at Rosario International AirportclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Feb 274%Feb 274%May 3152%May 3152%Aug 2863%Aug 2863%Apr 2763%Apr 2763%NowNowclearmostly clearovercastpartly cloudymostly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Rosario International Airport varies throughout the year.

The wetter season lasts 6.9 months, from September 28 to April 24, with a greater than 22% chance of a given day being a wet day. The chance of a wet day peaks at 35% on December 12.

The drier season lasts 5.1 months, from April 24 to September 28. The smallest chance of a wet day is 9% on July 20.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 35% on December 12.

Daily Chance of Precipitation at Rosario International Airport

Daily Chance of Precipitation at Rosario International AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Dec 1235%Dec 1235%Jul 209%Jul 209%Sep 2822%Sep 2822%Apr 2422%Apr 2422%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Rosario International Airport experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Rosario International Airport. The most rain falls during the 31 days centered around February 23, with an average total accumulation of 5.4 inches.

The least rain falls around July 8, with an average total accumulation of 0.8 inches.

Average Monthly Rainfall at Rosario International Airport

Average Monthly Rainfall at Rosario International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inFeb 235.4 inFeb 235.4 inJul 80.8 inJul 80.8 inDec 194.9 inDec 194.9 inOct 314.5 inOct 314.5 inJan 84.4 inJan 84.4 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day at Rosario International Airport varies significantly over the course of the year. In 2021, the shortest day is June 21, with 9 hours, 59 minutes of daylight; the longest day is December 21, with 14 hours, 20 minutes of daylight.

Hours of Daylight and Twilight at Rosario International Airport

Hours of Daylight and Twilight at Rosario International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minSep 2212 hr, 7 minSep 2214 hr, 20 minDec 2114 hr, 20 minDec 2112 hr, 9 minMar 2012 hr, 9 minMar 209 hr, 59 minJun 219 hr, 59 minJun 21daydaynightNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:47 AM on December 4, and the latest sunrise is 2 hours, 19 minutes later at 8:06 AM on June 30. The earliest sunset is at 6:03 PM on June 11, and the latest sunset is 2 hours, 12 minutes later at 8:15 PM on January 7.

Daylight saving time (DST) is not observed at Rosario International Airport during 2021.

Sunrise & Sunset with Twilight at Rosario International Airport

Sunrise & Sunset with Twilight at Rosario International AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMDec 45:47 AMDec 45:47 AM8:15 PMJan 78:15 PMJan 7Jun 116:03 PMJun 116:03 PM8:06 AMJun 308:06 AMJun 30daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Moon

The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases at Rosario International Airport

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Rosario International Airport experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.4 months, from November 8 to April 21, during which time the comfort level is muggy, oppressive, or miserable at least 13% of the time. The muggiest day of the year is February 8, with muggy conditions 50% of the time.

The least muggy day of the year is July 18, when muggy conditions are essentially unheard of.

Humidity Comfort Levels at Rosario International Airport

Humidity Comfort Levels at Rosario International AirportmuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 180%Jul 180%Feb 850%Feb 850%Nov 813%Nov 813%Apr 2113%Apr 2113%NowNowoppressiveoppressivemuggymuggycomfortablecomfortabledrydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Rosario International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.1 months, from July 9 to December 12, with average wind speeds of more than 8.4 miles per hour. The windiest day of the year is September 13, with an average hourly wind speed of 9.4 miles per hour.

The calmer time of year lasts for 6.9 months, from December 12 to July 9. The calmest day of the year is March 1, with an average hourly wind speed of 7.4 miles per hour.

Average Wind Speed at Rosario International Airport

Average Wind Speed at Rosario International AirportwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphSep 139.4 mphSep 139.4 mphMar 17.4 mphMar 17.4 mphJul 98.4 mphJul 98.4 mphDec 128.4 mphDec 128.4 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Rosario International Airport varies throughout the year.

The wind is most often from the north for 4.3 months, from March 28 to August 6, with a peak percentage of 40% on May 14. The wind is most often from the south for 1.3 months, from August 6 to September 14, with a peak percentage of 35% on September 9. The wind is most often from the east for 6.5 months, from September 14 to March 28, with a peak percentage of 39% on January 1.

Wind Direction at Rosario International Airport

Wind Direction at Rosario International AirportENSEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsoutheastnorthwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is at Rosario International Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Rosario International Airport for general outdoor tourist activities are from late January to mid April and from early October to early January, with a peak score in the third week of November.

Tourism Score at Rosario International Airport

Tourism Score at Rosario International Airportbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.07.03.03.06.96.96.26.2NowNowprecipitationprecipitationcloudsclouds tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Rosario International Airport for hot-weather activities is from early December to early March, with a peak score in the second week of January.

Beach/Pool Score at Rosario International Airport

Beach/Pool Score at Rosario International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.60.30.3NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Rosario International Airport typically lasts for 9.2 months (280 days), from around August 27 to around June 3, rarely starting before July 15 or after September 18, and rarely ending before May 10 or after July 3.

Time Spent in Various Temperature Bands and the Growing Season at Rosario International Airport

Time Spent in Various Temperature Bands and the Growing Season at Rosario International Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Aug 2750%Aug 2750%Jun 350%Jun 390%Sep 1890%Sep 1890%May 1090%May 1010%Jul 1510%Jul 1510%Jul 310%Jul 3Jan 8100%Jan 8100%NowNowvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms at Rosario International Airport should appear around July 22, only rarely appearing before July 15 or after August 4.

Growing Degree Days at Rosario International Airport

Growing Degree Days at Rosario International AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FJul 2290°FJul 2290°FOct 20900°FOct 20900°FDec 61,800°FDec 61,800°FJun 305,364°FJun 305,364°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from October 28 to February 15, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest day of the year is January 6, with an average of 7.7 kWh.

The darker period of the year lasts for 3.3 months, from May 1 to August 11, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest day of the year is June 21, with an average of 2.7 kWh.

Average Daily Incident Shortwave Solar Energy at Rosario International Airport

Average Daily Incident Shortwave Solar Energy at Rosario International AirportbrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJan 67.7 kWhJan 67.7 kWhJun 212.7 kWhJun 212.7 kWhOct 286.7 kWhOct 286.7 kWhMay 13.7 kWhMay 13.7 kWhAug 113.7 kWhAug 113.7 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Rosario International Airport are -32.904 deg latitude, -60.785 deg longitude, and 89 ft elevation.

The topography within 2 miles of Rosario International Airport is essentially flat, with a maximum elevation change of 72 feet and an average elevation above sea level of 85 feet. Within 10 miles is essentially flat (226 feet). Within 50 miles contains only modest variations in elevation (509 feet).

The area within 2 miles of Rosario International Airport is covered by cropland (63%), grassland (14%), trees (12%), and shrubs (11%), within 10 miles by cropland (54%) and trees (10%), and within 50 miles by cropland (57%) and herbaceous vegetation (13%).

Data Sources

This report illustrates the typical weather at Rosario International Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Rosario International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Parana Airport, Sauce Viejo Airport, and Marcos Juárez Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.