Climate and Average Weather Year Round in Mariano Moreno Argentina

In Mariano Moreno, the summers are warm, dry, and mostly clear and the winters are very cold, wet, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 31°F to 80°F and is rarely below 23°F or above 88°F.

Based on the tourism score, the best time of year to visit Mariano Moreno for warm-weather activities is from mid December to late February.

The warm season lasts for 3.6 months, from November 28 to March 15, with an average daily high temperature above 73°F. The hottest month of the year in Mariano Moreno is January, with an average high of 79°F and low of 52°F.

The cold season lasts for 3.2 months, from May 18 to August 26, with an average daily high temperature below 54°F. The coldest month of the year in Mariano Moreno is July, with an average low of 31°F and high of 49°F.

In Mariano Moreno, 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 Mariano Moreno begins around October 12 and lasts for 5.9 months, ending around April 8.

The clearest month of the year in Mariano Moreno is January, during which on average the sky is clear, mostly clear, or partly cloudy 82% of the time.

The cloudier part of the year begins around April 8 and lasts for 6.1 months, ending around October 12.

The cloudiest month of the year in Mariano Moreno is May, during which on average the sky is overcast or mostly cloudy 52% of the time.

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

The wetter season lasts 4.3 months, from April 28 to September 8, with a greater than 26% chance of a given day being a wet day. The month with the most wet days in Mariano Moreno is June, with an average of 12.5 days with at least 0.04 inches of precipitation.

The drier season lasts 7.7 months, from September 8 to April 28. The month with the fewest wet days in Mariano Moreno is January, 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 Mariano Moreno is June, with an average of 10.1 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 36% on May 28.

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. Mariano Moreno experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Mariano Moreno. The month with the most rain in Mariano Moreno is June, with an average rainfall of 3.5 inches.

The month with the least rain in Mariano Moreno is January, with an average rainfall of 0.7 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Mariano Moreno experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 3.0 months, from May 19 to August 21, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Mariano Moreno is July, with an average snowfall of 3.2 inches.

The snowless period of the year lasts for 9.0 months, from August 21 to May 19. The least snow falls around December 31, with an average total accumulation of 0.0 inches.

The length of the day in Mariano Moreno varies significantly over the course of the year. In 2024, the shortest day is June 20, with 9 hours, 27 minutes of daylight; the longest day is December 21, with 14 hours, 53 minutes of daylight.

The earliest sunrise is at 6:08 AM on December 7, and the latest sunrise is 2 hours, 51 minutes later at 8:59 AM on June 28. The earliest sunset is at 6:24 PM on June 12, and the latest sunset is 2 hours, 44 minutes later at 9:08 PM on January 5.

Daylight saving time (DST) is not observed in Mariano Moreno during 2024.

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.

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.

The perceived humidity level in Mariano Moreno, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

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 Mariano Moreno experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.0 months, from October 10 to January 10, with average wind speeds of more than 10.7 miles per hour. The windiest month of the year in Mariano Moreno is December, with an average hourly wind speed of 11.6 miles per hour.

The calmer time of year lasts for 9.0 months, from January 10 to October 10. The calmest month of the year in Mariano Moreno is March, with an average hourly wind speed of 9.7 miles per hour.

The predominant average hourly wind direction in Mariano Moreno is from the west throughout the year.

To characterize how pleasant the weather is in Mariano Moreno 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 Mariano Moreno for general outdoor tourist activities is from mid December to late February, with a peak score in the second week of January.

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 Mariano Moreno for hot-weather activities is from late December to mid February, with a peak score in the second week of January.

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 Mariano Moreno typically lasts for 6.0 months (182 days), from around October 16 to around April 16, rarely starting before September 21 or after November 11, and rarely ending before March 30 or after May 6.

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 Mariano Moreno should appear around September 23, only rarely appearing before September 12 or after October 4.

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 3.4 months, from November 4 to February 14, with an average daily incident shortwave energy per square meter above 7.8 kWh. The brightest month of the year in Mariano Moreno is December, with an average of 9.1 kWh.

The darker period of the year lasts for 3.8 months, from April 25 to August 18, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest month of the year in Mariano Moreno is June, with an average of 2.2 kWh.

For the purposes of this report, the geographical coordinates of Mariano Moreno are -38.750 deg latitude, -70.024 deg longitude, and 2,536 ft elevation.

The topography within 2 miles of Mariano Moreno contains very significant variations in elevation, with a maximum elevation change of 1,073 feet and an average elevation above sea level of 2,626 feet. Within 10 miles contains very significant variations in elevation (2,231 feet). Within 50 miles contains large variations in elevation (7,799 feet).

The area within 2 miles of Mariano Moreno is covered by bare soil (72%), within 10 miles by bare soil (54%) and trees (21%), and within 50 miles by bare soil (40%) and trees (19%).