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Climate and Average Weather Year Round in San Justo Argentina

In San Justo, the summers are hot, muggy, wet, and mostly clear and the winters are short, cool, and partly cloudy. Over the course of the year, the temperature typically varies from 45°F to 89°F and is rarely below 34°F or above 97°F.

Based on the tourism score, the best times of year to visit San Justo for warm-weather activities are from late February to early May and from late September to mid December.

Climate in San Justo

hotwarmcomfortablecoolcomfortablewarmhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow74%74%56%56%clearovercastprecipitation: 5.5 inprecipitation: 5.5 in0.9 in0.9 inmuggy: 63%muggy: 63%1%1%drydrytourism score: 6.9tourism score: 6.94.04.0
San Justo weather by month. Click on each chart for more information.

The hot season lasts for 3.4 months, from November 25 to March 5, with an average daily high temperature above 84°F. The hottest month of the year in San Justo is January, with an average high of 88°F and low of 69°F.

The cool season lasts for 2.9 months, from May 20 to August 17, with an average daily high temperature below 69°F. The coldest month of the year in San Justo is July, with an average low of 46°F and high of 64°F.

Average High and Low Temperature in San Justo

Average High and Low Temperature in San JustohothotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJul 1864°FJul 1864°FJan 889°FJan 889°F45°F45°F69°F69°FNov 2584°FNov 2584°FMar 584°FMar 584°FMay 2069°FMay 2069°FAug 1769°FAug 1769°F64°F64°F67°F67°F52°F52°F48°F48°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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 88°F85°F82°F76°F69°F64°F64°F68°F72°F77°F82°F86°F
Temp. 78°F76°F73°F66°F60°F55°F54°F57°F61°F67°F72°F76°F
Low 69°F68°F65°F58°F53°F48°F46°F48°F52°F58°F63°F67°F

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 in San Justo

Average Hourly Temperature in San JustoJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowcoldcoldcoolcomfortablecomfortablewarmwarmhothotwarm
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.

Al Bahah, Saudi Arabia (7,616 miles away) is the far-away foreign place with temperatures most similar to San Justo (view comparison).

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In San Justo, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in San Justo begins around August 11 and lasts for 8.7 months, ending around May 3.

The clearest month of the year in San Justo is March, during which on average the sky is clear, mostly clear, or partly cloudy 73% of the time.

The cloudier part of the year begins around May 3 and lasts for 3.3 months, ending around August 11.

The cloudiest month of the year in San Justo is June, during which on average the sky is overcast or mostly cloudy 43% of the time.

Cloud Cover Categories in San Justo

Cloud Cover Categories in San JustoclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Mar 1774%Mar 1774%Jun 1056%Jun 1056%Aug 1165%Aug 1165%May 365%May 365%NowNowclearmostly clearpartly cloudyovercastmostly 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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 30%29%27%31%39%43%38%34%32%31%29%29%
Clearer 70%71%73%69%61%57%62%66%68%69%71%71%

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

The wetter season lasts 6.7 months, from October 5 to April 26, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in San Justo is February, with an average of 10.2 days with at least 0.04 inches of precipitation.

The drier season lasts 5.3 months, from April 26 to October 5. The month with the fewest wet days in San Justo is July, with an average of 3.0 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in San Justo is February, with an average of 10.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 37% on February 8.

Daily Chance of Precipitation in San Justo

Daily Chance of Precipitation in San JustowetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 837%Feb 837%Aug 89%Aug 89%Oct 523%Oct 523%Apr 2623%Apr 2623%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 9.8d10.2d10.0d8.5d5.3d3.1d3.0d3.2d5.2d8.2d9.7d10.4d

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. San Justo experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in San Justo. The month with the most rain in San Justo is March, with an average rainfall of 5.5 inches.

The month with the least rain in San Justo is July, with an average rainfall of 0.9 inches.

Average Monthly Rainfall in San Justo

Average Monthly Rainfall in San JustoJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inDec 75.5 inDec 75.5 inJul 170.9 inJul 170.9 inMar 175.5 inMar 175.5 inJan 74.4 inJan 74.4 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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 4.6″5.4″5.5″4.5″2.1″1.1″0.9″1.1″2.0″3.9″5.1″5.3″

The length of the day in San Justo varies significantly over the course of the year. In 2024, the shortest day is June 20, with 10 hours, 9 minutes of daylight; the longest day is December 21, with 14 hours, 9 minutes of daylight.

Hours of Daylight and Twilight in San Justo

Hours of Daylight and Twilight in San JustoJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2212 hr, 6 minSep 2214 hr, 9 minDec 2114 hr, 9 minDec 2112 hr, 8 minMar 2012 hr, 8 minMar 2010 hr, 9 minJun 2010 hr, 9 minJun 20daydaynightNowNow
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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 13.9h13.2h12.2h11.3h10.5h10.2h10.4h11.1h11.9h12.9h13.7h14.1h

The earliest sunrise is at 5:51 AM on December 3, and the latest sunrise is 2 hours, 9 minutes later at 8:00 AM on June 30. The earliest sunset is at 6:07 PM on June 10, and the latest sunset is 2 hours, 2 minutes later at 8:09 PM on January 8.

Daylight saving time (DST) is not observed in San Justo during 2024.

Sunrise & Sunset with Twilight in San Justo

Sunrise & Sunset with Twilight in San JustoJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMDec 35:51 AMDec 35:51 AM8:09 PMJan 88:09 PMJan 8Jun 106:07 PMJun 106:07 PM8:00 AMJun 308:00 AMJun 30daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in San Justo

Solar Elevation and Azimuth in San JustoJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00001010101020202020303030304040405050506060708000001010101020202020303030304040405050606070708036NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. 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 in San Justo

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.

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.

San Justo experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.4 months, from October 14 to April 28, during which time the comfort level is muggy, oppressive, or miserable at least 17% of the time. The month with the most muggy days in San Justo is February, with 18.0 days that are muggy or worse.

The month with the fewest muggy days in San Justo is July, with 0.6 days that are muggy or worse.

Humidity Comfort Levels in San Justo

Humidity Comfort Levels in San JustomuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 201%Jul 201%Feb 863%Feb 863%Oct 1417%Oct 1417%Apr 2817%Apr 2817%NowNowoppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortablemiserablemiserable
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 17.9d18.0d15.0d7.5d3.5d1.6d0.6d0.8d1.7d5.0d8.5d14.4d

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 in San Justo experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.3 months, from July 20 to November 29, with average wind speeds of more than 8.9 miles per hour. The windiest month of the year in San Justo is September, with an average hourly wind speed of 10.0 miles per hour.

The calmer time of year lasts for 7.7 months, from November 29 to July 20. The calmest month of the year in San Justo is March, with an average hourly wind speed of 7.9 miles per hour.

Average Wind Speed in San Justo

Average Wind Speed in San JustowindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphSep 1210.1 mphSep 1210.1 mphMar 67.8 mphMar 67.8 mphJul 208.9 mphJul 208.9 mphNov 298.9 mphNov 298.9 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 8.18.07.98.08.18.38.89.410.09.89.48.5

The predominant average hourly wind direction in San Justo varies throughout the year.

The wind is most often from the north for 4.1 weeks, from May 7 to June 5, with a peak percentage of 35% on May 29. The wind is most often from the south for 2.5 months, from June 5 to August 22, with a peak percentage of 36% on August 11. The wind is most often from the east for 8.5 months, from August 22 to May 7, with a peak percentage of 48% on January 1.

Wind Direction in San Justo

Wind Direction in San JustoENSEJanFebMarAprMayJunJulAugSepOctNovDec0%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).

To characterize how pleasant the weather is in San Justo 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 San Justo for general outdoor tourist activities are from late February to early May and from late September to mid December, with a peak score in the last week of March.

Tourism Score in San Justo

Tourism Score in San Justobest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.94.04.06.96.95.65.6NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism 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 San Justo for hot-weather activities is from late November to mid March, with a peak score in the first week of January.

Beach/Pool Score in San Justo

Beach/Pool Score in San Justobest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.60.80.8NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/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.

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 in San Justo typically lasts for 11 months (338 days), from around July 26 to around June 28, rarely starting after September 4, or ending before June 5.

Time Spent in Various Temperature Bands and the Growing Season in San Justo

Time Spent in Various Temperature Bands and the Growing Season in San Justogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Jul 2650%Jul 2650%Jun 2850%Jun 2890%Sep 490%Sep 490%Jun 590%Jun 5Jan 24100%Jan 24100%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 in San Justo should appear around July 15, only rarely appearing before July 11 or after July 25.

Growing Degree Days in San Justo

Growing Degree Days in San JustoJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°FJul 1590°FJul 1590°FOct 7900°FOct 7900°FNov 231,800°FNov 231,800°FJun 306,059°FJun 306,059°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from October 25 to February 14, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest month of the year in San Justo is December, with an average of 7.6 kWh.

The darker period of the year lasts for 3.2 months, from May 2 to August 8, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest month of the year in San Justo is June, with an average of 3.0 kWh.

Average Daily Incident Shortwave Solar Energy in San Justo

Average Daily Incident Shortwave Solar Energy in San JustobrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhDec 157.6 kWhDec 157.6 kWhJun 193.0 kWhJun 193.0 kWhOct 256.7 kWhOct 256.7 kWhFeb 146.7 kWhFeb 146.7 kWhMay 23.9 kWhMay 23.9 kWhAug 83.9 kWhAug 83.9 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 7.46.75.74.53.53.03.34.25.26.37.37.6

For the purposes of this report, the geographical coordinates of San Justo are -30.789 deg latitude, -60.592 deg longitude, and 194 ft elevation.

The topography within 2 miles of San Justo is essentially flat, with a maximum elevation change of 72 feet and an average elevation above sea level of 179 feet. Within 10 miles is essentially flat (157 feet). Within 50 miles also contains only modest variations in elevation (344 feet).

The area within 2 miles of San Justo is covered by cropland (66%), grassland (13%), and trees (11%), within 10 miles by cropland (62%) and shrubs (13%), and within 50 miles by cropland (39%) and shrubs (23%).

This report illustrates the typical weather in San Justo, 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

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in San Justo.

For each station, the records are corrected for the elevation difference between that station and San Justo according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at San Justo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Justo and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of San Justo and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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 © OpenStreetMap contributors.

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.

Please review our full terms contained on our Terms of Service page.