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Average Weather in Cachoeiras de Macacu Brazil

In Cachoeiras de Macacu, the summers are hot, oppressive, wet, and overcast and the winters are comfortable and mostly clear. Over the course of the year, the temperature typically varies from 59°F to 89°F and is rarely below 54°F or above 95°F.

Based on the tourism score, the best time of year to visit Cachoeiras de Macacu for warm-weather activities is from late April to mid September.

Climate Summary

hotwarmhotJanFebMarAprMayJunJulAugSepOctNovDec73%73%26%26%overcastclearprecipitation: 8.3 inprecipitation: 8.3 in1.1 in1.1 inmuggy: 96%muggy: 96%6%6%drydrytourism score: 7.4tourism score: 7.43.33.3
Click on each chart for more information.

Temperature

The hot season lasts for 3.0 months, from December 16 to March 17, with an average daily high temperature above 87°F. The hottest day of the year is February 13, with an average high of 89°F and low of 71°F.

The cool season lasts for 3.1 months, from May 11 to August 15, with an average daily high temperature below 80°F. The coldest day of the year is July 23, with an average low of 59°F and high of 78°F.

Average High and Low Temperature

Average High and Low Temperature in Cachoeiras de MacacuhotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FJul 2378°FJul 2378°FFeb 1389°FFeb 1389°F59°F59°F71°F71°FDec 1687°FDec 1687°FMay 1180°FMay 1180°F70°F70°F70°F70°F63°F63°FLowHigh
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 Cachoeiras de MacacuJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcoolcoolcomfortablecomfortablewarmhothot
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.

Komatipoort, South Africa (4,656 miles away) and Ambovombe, Madagascar (5,504 miles) are the far-away foreign places with temperatures most similar to Cachoeiras de Macacu (view comparison).

Clouds

In Cachoeiras de Macacu, 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 Cachoeiras de Macacu begins around April 5 and lasts for 6.3 months, ending around October 14. On August 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 73% of the time, and overcast or mostly cloudy 27% of the time.

The cloudier part of the year begins around October 14 and lasts for 5.7 months, ending around April 5. On January 14, the cloudiest day of the year, the sky is overcast or mostly cloudy 74% of the time, and clear, mostly clear, or partly cloudy 26% of the time.

Cloud Cover Categories

Cloud Cover Categories in Cachoeiras de MacacuclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2873%Aug 2873%Jan 1426%Jan 1426%Apr 549%Apr 549%Oct 1450%Oct 1450%clearmostly 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.

Precipitation

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

The wetter season lasts 5.3 months, from October 24 to April 2, with a greater than 41% chance of a given day being a wet day. The chance of a wet day peaks at 67% on December 20.

The drier season lasts 6.7 months, from April 2 to October 24. The smallest chance of a wet day is 15% on July 14.

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 67% on December 20.

Daily Chance of Precipitation

Daily Chance of Precipitation in Cachoeiras de MacacuwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 2067%Dec 2067%Jul 1415%Jul 1415%Oct 2441%Oct 2441%Apr 241%Apr 241%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. Cachoeiras de Macacu experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Cachoeiras de Macacu. The most rain falls during the 31 days centered around December 27, with an average total accumulation of 8.3 inches.

The least rain falls around August 4, with an average total accumulation of 1.1 inches.

Average Monthly Rainfall

Average Monthly Rainfall in Cachoeiras de MacacuJanFebMarAprMayJunJulAugSepOctNovDec0 in2 in4 in6 in8 in10 in12 in14 inDec 278.3 inDec 278.3 inAug 41.1 inAug 41.1 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 Cachoeiras de Macacu varies over the course of the year. In 2018, the shortest day is June 21, with 10 hours, 45 minutes of daylight; the longest day is December 21, with 13 hours, 31 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Cachoeiras de MacacuJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2212 hr, 6 minSep 2213 hr, 31 minDec 2113 hr, 31 minDec 2112 hr, 7 minMar 2012 hr, 7 minMar 2010 hr, 45 minJun 2110 hr, 45 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 5:14 AM on October 20, and the latest sunrise is 1 hour, 26 minutes later at 6:40 AM on February 17. The earliest sunset is at 5:13 PM on June 6, and the latest sunset is 2 hours, 27 minutes later at 7:40 PM on January 14.

Daylight saving time (DST) is observed in Cachoeiras de Macacu during 2018, starting in the spring on October 21 and ending in the fall on February 17.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in Cachoeiras de MacacuJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMOct 205:14 AMOct 205:14 AM7:40 PMJan 147:40 PMJan 14Jun 65:13 PMJun 65:13 PM6:40 AMFeb 176:40 AMFeb 17DSTFeb 17DSTFeb 17Oct 21DSTOct 21DSTdaynightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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. The transitions to and from daylight saving time are indicated by the 'DST' labels.

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.

Cachoeiras de Macacu experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 8.0 months, from September 28 to May 27, during which time the comfort level is muggy, oppressive, or miserable at least 28% of the time. The muggiest day of the year is February 5, with muggy conditions 96% of the time.

The least muggy day of the year is July 21, with muggy conditions 6% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in Cachoeiras de MacacumuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 216%Jul 216%96%Feb 596%Feb 5Sep 2828%Sep 2828%May 2728%May 2728%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydrymiserablemiserable
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 Cachoeiras de Macacu experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.7 months, from July 29 to December 18, with average wind speeds of more than 6.4 miles per hour. The windiest day of the year is September 26, with an average hourly wind speed of 7.5 miles per hour.

The calmer time of year lasts for 7.3 months, from December 18 to July 29. The calmest day of the year is March 31, with an average hourly wind speed of 5.3 miles per hour.

Average Wind Speed

Average Wind Speed in Cachoeiras de MacacuwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphSep 267.5 mphSep 267.5 mphMar 315.3 mphMar 315.3 mphJul 296.4 mphJul 296.4 mphDec 186.4 mphDec 186.4 mph
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 Cachoeiras de Macacu varies throughout the year.

The wind is most often from the east for 1.5 months, from September 23 to November 9, with a peak percentage of 35% on October 16. The wind is most often from the north for 10 months, from November 9 to September 23, with a peak percentage of 51% on January 1.

Wind Direction

Wind Direction in Cachoeiras de MacacuNENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southeastnorthwest
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).

Water Temperature

Cachoeiras de Macacu is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.2 months, from January 19 to April 25, with an average temperature above 76°F. The day of the year with the warmest water is March 13, with an average temperature of 78°F.

The time of year with cooler water lasts for 3.5 months, from July 9 to October 27, with an average temperature below 72°F. The day of the year with the coolest water is September 16, with an average temperature of 70°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Cachoeiras de Macacu 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 Cachoeiras de Macacu for general outdoor tourist activities is from late April to mid September, with a peak score in the first week of August.

Tourism Score

Tourism Score in Cachoeiras de Macacubest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.47.43.33.3 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 Cachoeiras de Macacu for hot-weather activities is from late March to mid May, with a peak score in the last week of April.

Beach/Pool Score

Beach/Pool Score in Cachoeiras de Macacubest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.26.24.44.45.65.64.64.6 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).

Temperatures in Cachoeiras de Macacu are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Cachoeiras de MacacuJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3coolcomfortablewarmhotcold
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.

Growing Degree Days

Growing Degree Days in Cachoeiras de MacacuJanFebMarAprMayJunJulAugSepOctNovDec0°F1,000°F2,000°F3,000°F4,000°F5,000°F6,000°F7,000°F8,000°FJul 690°FJul 690°FAug 21900°FAug 21900°FOct 51,800°FOct 51,800°FJun 308,302°FJun 308,302°F
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 some seasonal variation over the course of the year.

The brighter period of the year lasts for 5.1 months, from October 1 to March 5, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is January 21, with an average of 6.3 kWh.

The darker period of the year lasts for 2.5 months, from May 11 to July 28, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest day of the year is June 27, with an average of 3.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Cachoeiras de MacacubrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJan 216.3 kWhJan 216.3 kWhJun 273.9 kWhJun 273.9 kWhOct 15.8 kWhOct 15.8 kWhMar 55.8 kWhMar 55.8 kWhMay 114.4 kWhMay 114.4 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 Cachoeiras de Macacu are -22.462 deg latitude, -42.653 deg longitude, and 948 ft elevation.

The topography within 2 miles of Cachoeiras de Macacu contains large variations in elevation, with a maximum elevation change of 2,306 feet and an average elevation above sea level of 770 feet. Within 10 miles contains large variations in elevation (7,402 feet). Within 50 miles also contains extreme variations in elevation (7,552 feet).

The area within 2 miles of Cachoeiras de Macacu is covered by trees (65%), cropland (19%), and shrubs (10%), within 10 miles by trees (82%) and cropland (11%), and within 50 miles by trees (42%) and water (21%).

Data Sources

This report illustrates the typical weather in Cachoeiras de Macacu, 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 Cachoeiras de Macacu.

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

The stations contributing to this reconstruction are: Rio de Janeiro-Galeão International Airport (37%, 72 kilometers, southwest); Santos Dumont Airport (37%, 72 kilometers, southwest); and Benedito Lacerda Airport (26%, 92 kilometers, east).

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.