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Average Weather in San Martín Argentina

In San Martín, the summers are hot and mostly clear and the winters are cold, dry, and partly cloudy. Over the course of the year, the temperature typically varies from 37°F to 89°F and is rarely below 30°F or above 97°F.

Based on the tourism score, the best time of year to visit San Martín for warm-weather activities is from mid October to early April.

Climate Summary

hotwarmcoolcomfortablewarmhotJanFebMarAprMayJunJulAugSepOctNovDec85%85%54%54%clearovercastprecipitation: 1.6 inprecipitation: 1.6 in0.2 in0.2 inmuggy: 13%muggy: 13%0%0%drydrytourism score: 7.6tourism score: 7.62.12.1
Click on each chart for more information.

Temperature

The hot season lasts for 3.8 months, from November 15 to March 10, with an average daily high temperature above 83°F. The hottest day of the year is January 1, with an average high of 89°F and low of 66°F.

The cool season lasts for 3.0 months, from May 17 to August 17, with an average daily high temperature below 65°F. The coldest day of the year is July 12, with an average low of 37°F and high of 59°F.

Average High and Low Temperature

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

Average Hourly Temperature in San MartínJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldcoldcoldcoolcomfortablewarmwarmhothotcomfortablevery cold
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.

De Aar, South Africa (5,236 miles away) and Gilgandra, Australia (7,356 miles) are the far-away foreign places with temperatures most similar to San Martín (view comparison).

Clouds

In San Martín, 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 in San Martín begins around August 17 and lasts for 8.3 months, ending around April 27. On December 8, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 85% of the time, and overcast or mostly cloudy 15% of the time.

The cloudier part of the year begins around April 27 and lasts for 3.7 months, ending around August 17. On June 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 46% of the time, and clear, mostly clear, or partly cloudy 54% of the time.

Cloud Cover Categories

Cloud Cover Categories in San MartínclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Dec 885%Dec 885%Jun 154%Jun 154%Aug 1769%Aug 1769%Apr 2770%Apr 2770%clearmostly 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 in San Martín varies throughout the year.

The wetter season lasts 4.0 months, from November 24 to March 23, with a greater than 13% chance of a given day being a wet day. The chance of a wet day peaks at 24% on January 12.

The drier season lasts 8.0 months, from March 23 to November 24. The smallest chance of a wet day is 3% on June 21.

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 24% on January 12.

Daily Chance of Precipitation

Daily Chance of Precipitation in San MartínwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 1224%Jan 1224%Jun 213%Jun 213%Jan 120%Jan 120%Mar 2313%Mar 2313%rain
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. San Martín experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.9 months, from September 25 to April 21, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 17, with an average total accumulation of 1.6 inches.

The rainless period of the year lasts for 5.1 months, from April 21 to September 25. The least rain falls around July 29, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

Average Monthly Rainfall in San MartínrainrainJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 in3.5 inFeb 171.6 inFeb 171.6 inJul 290.2 inJul 290.2 inSep 250.5 inSep 250.5 inApr 210.5 inApr 210.5 in
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 in San Martín varies significantly over the course of the year. In 2018, the shortest day is June 21, with 9 hours, 58 minutes of daylight; the longest day is December 21, with 14 hours, 21 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in San MartínJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minSep 2212 hr, 7 minSep 2214 hr, 21 minDec 2114 hr, 21 minDec 2112 hr, 8 minMar 2012 hr, 8 minMar 209 hr, 58 minJun 219 hr, 58 minJun 21daydaynight
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 6:17 AM on December 4, and the latest sunrise is 2 hours, 20 minutes later at 8:37 AM on June 30. The earliest sunset is at 6:33 PM on June 11, and the latest sunset is 2 hours, 13 minutes later at 8:46 PM on January 7.

Daylight saving time (DST) is not observed in San Martín during 2018.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in San MartínJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMDec 46:17 AMDec 46:17 AM8:46 PMJan 78:46 PMJan 7Jun 116:33 PMJun 116:33 PM8:37 AMJun 308:37 AMJun 30daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

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.

San Martín experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from December 10 to March 28, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The muggiest day of the year is January 8, with muggy conditions 13% of the time.

The least muggy day of the year is July 26, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in San MartínmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 260%Jul 260%Jan 813%Jan 813%Dec 103%Dec 103%Mar 283%Mar 283%muggymuggyhumidhumidcomfortablecomfortabledrydry
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 in San Martín experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.0 months, from August 27 to March 29, with average wind speeds of more than 8.8 miles per hour. The windiest day of the year is November 11, with an average hourly wind speed of 10.6 miles per hour.

The calmer time of year lasts for 5.0 months, from March 29 to August 27. The calmest day of the year is June 16, with an average hourly wind speed of 7.0 miles per hour.

Average Wind Speed

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 in San Martín is from the east throughout the year.

Wind Direction

Wind Direction in San MartínJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southeastnorth
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 in San Martín 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 time of year to visit San Martín for general outdoor tourist activities is from mid October to early April, with a peak score in the last week of November.

Tourism Score

Tourism Score in San Martínbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.67.62.12.17.57.57.07.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Martín for hot-weather activities is from early December to mid February, with a peak score in the first week of January.

Beach/Pool Score

Beach/Pool Score in San MartínJanFebMarAprMayJunJulAugSepOctNovDec02468106.86.80.10.1 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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 in San Martín typically lasts for 9.9 months (302 days), from around August 13 to around June 11, rarely starting before July 19 or after September 8, and rarely ending before May 14 or after July 9.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in San Martíngrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Aug 1350%Aug 1350%Jun 1150%Jun 1190%Sep 890%Sep 890%May 1490%May 1410%Jul 1910%Jul 1910%Jul 910%Jul 9Jan 9100%Jan 9100%very 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 Martín should appear around August 4, only rarely appearing before July 28 or after August 14.

Growing Degree Days

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 26 to February 12, with an average daily incident shortwave energy per square meter above 7.6 kWh. The brightest day of the year is December 7, with an average of 8.7 kWh.

The darker period of the year lasts for 3.4 months, from May 1 to August 12, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is June 23, with an average of 3.0 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in San MartínbrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhDec 78.7 kWhDec 78.7 kWhJun 233.0 kWhJun 233.0 kWhOct 267.6 kWhOct 267.6 kWhFeb 127.6 kWhFeb 127.6 kWhMay 14.2 kWhMay 14.2 kWhAug 124.2 kWhAug 124.2 kWh
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 San Martín are -33.081 deg latitude, -68.468 deg longitude, and 2,165 ft elevation.

The topography within 2 miles of San Martín is essentially flat, with a maximum elevation change of 85 feet and an average elevation above sea level of 2,169 feet. Within 10 miles is essentially flat (236 feet). Within 50 miles contains only modest variations in elevation (9,629 feet).

The area within 2 miles of San Martín is covered by grassland (27%), bare soil (27%), trees (21%), and shrubs (20%), within 10 miles by cropland (35%) and grassland (23%), and within 50 miles by grassland (29%) and trees (25%).

Data Sources

This report illustrates the typical weather in San Martín, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in San Martín.

For each station, the records are corrected for the elevation difference between that station and San Martín 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 Martín is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Martín and a given station.

The stations contributing to this reconstruction are: San Martín Airport (96%, 4.8 kilometers, east) and Mendoza Aerodrome (3.8%, 41 kilometers, northwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.