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April Weather at Pilar Observatorio Argentina

Daily high temperatures decrease by 6°F, from 77°F to 71°F, rarely falling below 60°F or exceeding 86°F.

Daily low temperatures decrease by 6°F, from 58°F to 52°F, rarely falling below 42°F or exceeding 66°F.

For reference, on January 8, the hottest day of the year, temperatures at Pilar Observatorio typically range from 66°F to 86°F, while on July 18, the coldest day of the year, they range from 41°F to 62°F.

Average High and Low Temperature in April at Pilar Observatorio

Average High and Low Temperature in April at Pilar ObservatorioApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303035°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°FMarMayApr 177°FApr 177°F58°F58°FApr 3071°FApr 3071°F52°F52°FApr 1175°FApr 1175°F56°F56°FApr 2173°FApr 2173°F54°F54°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 hourly average temperatures for the quarter of the year centered on April. 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 April at Pilar Observatorio

Average Hourly Temperature in April at Pilar ObservatorioApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMayNowNowcoldcoldcoolcomfortablecomfortablewarm
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.

Maitland, Australia (7,430 miles away) and Kingaroy, Australia (7,786 miles) are the far-away foreign places with temperatures most similar to Pilar Observatorio (view comparison).

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The month of April at Pilar Observatorio experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 23% to 30%.

The clearest day of the month is April 1, 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 40%, while on March 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.

Cloud Cover Categories in April at Pilar Observatorio

Cloud Cover Categories in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 177%Apr 177%Apr 3070%Apr 3070%Apr 1176%Apr 1176%Apr 2173%Apr 2173%NowNowclearmostly clearpartly cloudymostly cloudyovercast
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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Pilar Observatorio, the chance of a wet day over the course of April is very rapidly decreasing, starting the month at 26% and ending it at 15%.

For reference, the year's highest daily chance of a wet day is 42% on January 1, and its lowest chance is 3% on August 8.

Probability of Precipitation in April at Pilar Observatorio

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 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 April at Pilar Observatorio is rapidly decreasing, starting the month at 3.1 inches, when it rarely exceeds 5.7 inches or falls below 0.9 inches, and ending the month at 1.5 inches, when it rarely exceeds 3.4 inches or falls below 0.3 inches.

Average Monthly Rainfall in April at Pilar Observatorio

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.

Over the course of April at Pilar Observatorio, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 52 minutes, implying an average daily decrease of 1 minute, 47 seconds, and weekly decrease of 12 minutes, 29 seconds.

The shortest day of the month is April 30, with 10 hours, 52 minutes of daylight and the longest day is April 1, with 11 hours, 43 minutes of daylight.

Hours of Daylight and Twilight in April at Pilar Observatorio

Hours of Daylight and Twilight in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrMarMaydaydaydaydaynightApr 111 hr, 43 minApr 111 hr, 43 minApr 3010 hr, 52 minApr 3010 hr, 52 minApr 1611 hr, 16 minApr 1611 hr, 16 minNowNow
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 of the month at Pilar Observatorio is 7:27 AM on April 1 and the latest sunrise is 19 minutes later at 7:46 AM on April 30.

The latest sunset is 7:10 PM on April 1 and the earliest sunset is 32 minutes earlier at 6:38 PM on April 30.

Daylight saving time is not observed at Pilar Observatorio during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:07 AM and sets 14 hours, 13 minutes later, at 8:20 PM, while on June 20, the shortest day of the year, it rises at 8:14 AM and sets 10 hours, 5 minutes later, at 6:19 PM.

Sunrise & Sunset with Twilight in April at Pilar Observatorio

Sunrise & Sunset with Twilight in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay7:27 AM7:27 AMApr 17:10 PMApr 17:10 PM7:46 AM7:46 AMApr 306:38 PMApr 306:38 PM7:33 AM7:33 AMApr 116:58 PMApr 116:58 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. 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 April at Pilar Observatorio

Solar Elevation and Azimuth in April at Pilar ObservatorioApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMay001010202020303040405000010102020303030405060NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 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 April 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. 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 April at Pilar Observatorio

Moon Rise, Set & Phases in April at Pilar ObservatorioApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 106:01 AMMar 106:01 AMMar 254:01 AMMar 254:01 AMApr 83:22 PMApr 83:22 PMApr 238:50 PMApr 238:50 PMMay 812:23 AMMay 812:23 AMMay 2310:54 AMMay 2310:54 AM7:18 AM7:18 AM8:02 PM8:02 PM7:11 PM7:11 PM7:33 AM7:33 AM7:13 AM7:13 AM7:01 PM7:01 PM6:31 PM6:31 PM8:14 AM8:14 AM7:11 AM7:11 AM6:07 PM6:07 PM5:36 PM5:36 PM8:07 AM8:07 AM
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.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
58%-2:24 PMSW-6:48 AMN237,947 mi
2
50%12:12 AMESE3:18 PMWSW-7:47 AMN234,597 mi
3
35%1:19 AMESE4:05 PMWSW-8:45 AMN231,225 mi
4
24%2:30 AMESE4:47 PMWSW-9:42 AMN228,087 mi
5
15%3:41 AMESE5:23 PMWSW-10:36 AMN225,480 mi
6
7%4:52 AME5:57 PMW-11:27 AMN223,700 mi
7
2%6:03 AME6:29 PMW-12:17 PMN222,986 mi
8
0%7:13 AME7:01 PMW-1:08 PMN223,472 mi
9
1%8:24 AMENE7:36 PMWNW-2:00 PMN225,152 mi
10
6%9:36 AMENE8:15 PMWNW-2:55 PMN227,874 mi
11
12%10:47 AMENE8:59 PMWNW-3:53 PMN231,367 mi
12
21%11:56 AMENE9:50 PMWNW-4:53 PMN235,289 mi
13
31%1:00 PMNE10:45 PMNW-5:53 PMN239,279 mi
14
41%1:55 PMENE11:45 PMWNW-6:50 PMN243,017 mi
15
50%2:42 PMENE--7:44 PMN246,251 mi
16
62%-12:46 AMWNW3:22 PMENE8:34 PMN248,818 mi
17
71%-1:45 AMWNW3:55 PMENE9:19 PMN250,637 mi
18
79%-2:43 AMWNW4:24 PMENE10:01 PMN251,697 mi
19
87%-3:39 AMWNW4:50 PME10:41 PMN252,042 mi
20
92%-4:33 AMW5:15 PME11:20 PMN251,754 mi
21
97%-5:27 AMW5:39 PME11:58 PMN250,933 mi
22
98%-6:21 AMW6:04 PME--
23
100%-7:17 AMWSW6:31 PMESE12:38 AMN249,685 mi
24
100%-8:14 AMWSW7:02 PMESE1:20 AMN248,105 mi
25
99%-9:15 AMWSW7:37 PMESE2:05 AMN246,271 mi
26
95%-10:17 AMWSW8:19 PMESE2:54 AMN244,239 mi
27
89%-11:19 AMWSW9:08 PMSE3:47 AMN242,041 mi
28
82%-12:19 PMSW10:06 PMSE4:43 AMN239,703 mi
29
73%-1:14 PMWSW11:10 PMESE5:41 AMN237,252 mi
30
62%-2:03 PMWSW-6:39 AMN234,737 mi

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 at Pilar Observatorio is rapidly decreasing during April, falling from 17% to 5% over the course of the month.

For reference, on January 19, the muggiest day of the year, there are muggy conditions 43% of the time, while on July 16, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in April at Pilar Observatorio

Humidity Comfort Levels in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 117%Apr 117%Apr 305%Apr 305%Apr 1111%Apr 1111%Apr 218%Apr 218%NowNowoppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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.

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 Pilar Observatorio is essentially constant during April, remaining around 4.6 miles per hour throughout.

For reference, on September 20, the windiest day of the year, the daily average wind speed is 6.2 miles per hour, while on March 6, the calmest day of the year, the daily average wind speed is 4.4 miles per hour.

Average Wind Speed in April at Pilar Observatorio

Average Wind Speed in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mphMarMayApr 14.6 mphApr 14.6 mphApr 304.6 mphApr 304.6 mphApr 114.6 mphApr 114.6 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Pilar Observatorio throughout April is predominantly from the north, with a peak proportion of 47% on April 30.

Wind Direction in April at Pilar Observatorio

Wind Direction in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowsoutheastnorthwest
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).

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 Pilar Observatorio typically lasts for 9.9 months (302 days), from around August 17 to around June 15, rarely starting before July 18 or after September 15, and rarely ending before May 18 or after July 12.

The month of April at Pilar Observatorio is reliably fully within the growing season.

Time Spent in Various Temperature Bands and the Growing Season in April at Pilar Observatorio

Time Spent in Various Temperature Bands and the Growing Season in April at Pilar Observatoriogrowing seasonApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMay100%Apr 16100%Apr 1690%May 1890%May 18NowNowvery 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.

The average accumulated growing degree days at Pilar Observatorio are increasing during April, increasing by 403°F, from 4,475°F to 4,878°F, over the course of the month.

Growing Degree Days in April at Pilar Observatorio

Growing Degree Days in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930304,300°F4,300°F4,400°F4,400°F4,500°F4,500°F4,600°F4,600°F4,700°F4,700°F4,800°F4,800°F4,900°F4,900°F5,000°F5,000°F5,100°F5,100°FMarMayApr 14,475°FApr 14,475°FApr 304,878°FApr 304,878°FApr 114,633°FApr 114,633°FNowNow
The average growing degree days accumulated over the course of April, 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 at Pilar Observatorio is decreasing during April, falling by 1.0 kWh, from 5.1 kWh to 4.1 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April at Pilar Observatorio

Average Daily Incident Shortwave Solar Energy in April at Pilar ObservatorioApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMarMayApr 15.1 kWhApr 15.1 kWhApr 304.1 kWhApr 304.1 kWhApr 114.7 kWhApr 114.7 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.

For the purposes of this report, the geographical coordinates of Pilar Observatorio are -31.667 deg latitude, -63.883 deg longitude, and 1,089 ft elevation.

The topography within 2 miles of Pilar Observatorio contains only modest variations in elevation, with a maximum elevation change of 118 feet and an average elevation above sea level of 1,094 feet. Within 10 miles also contains only modest variations in elevation (322 feet). Within 50 miles contains only modest variations in elevation (6,188 feet).

The area within 2 miles of Pilar Observatorio is covered by cropland (74%), within 10 miles by cropland (88%), and within 50 miles by cropland (74%) and shrubs (11%).

This report illustrates the typical weather at Pilar Observatorio, 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

Pilar Observatorio 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 Pajas Blancas Airport, Villa Dolores Aerodrome, 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 © 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.

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