Average Weather in January in Merlo Argentina
Daily high temperatures are around 83°F, rarely falling below 74°F or exceeding 92°F. The highest daily average high temperature is 84°F on January 8.
Daily low temperatures are around 63°F, rarely falling below 56°F or exceeding 69°F. The highest daily average low temperature is 63°F on January 9.
For reference, on January 8, the hottest day of the year, temperatures in Merlo typically range from 63°F to 84°F, while on July 18, the coldest day of the year, they range from 38°F to 59°F.
Average High and Low Temperature in January
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. The horizontal axis is the day, 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 January
The month of January in Merlo experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 25% throughout the month. The highest chance of overcast or mostly cloudy conditions is 27% on January 10.
The clearest day of the month is January 29, with clear, mostly clear, or partly cloudy conditions 77% of the time.
For reference, on May 31, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on March 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%.
Cloud Cover Categories in January
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Merlo, the chance of a wet day over the course of January is decreasing, starting the month at 45% and ending it at 40%.
For reference, the year's highest daily chance of a wet day is 45% on December 29, and its lowest chance is 3% on August 11.
Probability of Precipitation in January
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during January in Merlo is gradually decreasing, starting the month at 4.5 inches, when it rarely exceeds 7.2 inches or falls below 2.5 inches, and ending the month at 4.2 inches, when it rarely exceeds 6.6 inches or falls below 2.1 inches.
The highest average 31-day accumulation is 4.6 inches on January 7.
Average Monthly Rainfall in January
Over the course of January in Merlo, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 35 minutes, implying an average daily decrease of 1 minute, 9 seconds, and weekly decrease of 8 minutes, 6 seconds.
The shortest day of the month is January 31, with 13 hours, 39 minutes of daylight and the longest day is January 1, with 14 hours, 14 minutes of daylight.
Hours of Daylight and Twilight in January
The earliest sunrise of the month in Merlo is 6:16 AM on January 1 and the latest sunrise is 27 minutes later at 6:43 AM on January 31.
The latest sunset is 8:31 PM on January 7 and the earliest sunset is 8 minutes earlier at 8:22 PM on January 31.
Daylight saving time is not observed in Merlo during 2021.
For reference, on December 21, the longest day of the year, the Sun rises at 6:09 AM and sets 14 hours, 17 minutes later, at 8:26 PM, while on June 21, the shortest day of the year, it rises at 8:21 AM and sets 10 hours, 2 minutes later, at 6:22 PM.
Sunrise & Sunset with Twilight in January
The figure below presents a compact representation of key lunar data for January 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in January
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 chance that a given day will be muggy in Merlo is essentially constant during January, remaining within 1% of 11% throughout.
For reference, on March 3, the muggiest day of the year, there are muggy conditions 13% of the time, while on May 31, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in January
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Merlo is essentially constant during January, remaining within 0.2 miles per hour of 7.4 miles per hour throughout.
For reference, on October 17, the windiest day of the year, the daily average wind speed is 9.0 miles per hour, while on May 6, the calmest day of the year, the daily average wind speed is 6.4 miles per hour.
Average Wind Speed in January
The hourly average wind direction in Merlo throughout January is predominantly from the east, with a peak proportion of 43% on January 1.
Wind Direction in January
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 Merlo typically lasts for 9.2 months (278 days), from around August 31 to around June 5, rarely starting before August 8 or after September 24, and rarely ending before April 29 or after July 1.
The month of January in Merlo is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in January
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.
The average accumulated growing degree days in Merlo are rapidly increasing during January, increasing by 677°F, from 2,201°F to 2,878°F, over the course of the month.
Growing Degree Days in January
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 in Merlo is essentially constant during January, remaining within 0.2 kWh of 7.5 kWh throughout.
Average Daily Incident Shortwave Solar Energy in January
For the purposes of this report, the geographical coordinates of Merlo are -32.343 deg latitude, -65.014 deg longitude, and 2,831 ft elevation.
The topography within 2 miles of Merlo contains very significant variations in elevation, with a maximum elevation change of 906 feet and an average elevation above sea level of 2,861 feet. Within 10 miles contains very significant variations in elevation (5,958 feet). Within 50 miles also contains extreme variations in elevation (7,963 feet).
The area within 2 miles of Merlo is covered by shrubs (39%), trees (30%), cropland (18%), and grassland (13%), within 10 miles by shrubs (51%) and trees (31%), and within 50 miles by shrubs (46%) and cropland (23%).
This report illustrates the typical weather in Merlo, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Merlo.
For each station, the records are corrected for the elevation difference between that station and Merlo 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 Merlo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Merlo and a given station.
The stations contributing to this reconstruction are: Villa Dolores Aerodrome (59%, 46 kilometers, north); Rio Cuarto Airport (18%, 109 kilometers, southeast); Villa Reynolds Airport (11%, 158 kilometers, south); and Brigadier Mayor César Raúl Ojeda Airport (11%, 163 kilometers, southwest).
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.
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.