Climate and Average Weather Year Round in Dois Riachos Brazil

In Dois Riachos, the summers are long, sweltering, dry, and mostly cloudy; the winters are short, warm, and mostly clear; and it is muggy and windy year round. Over the course of the year, the temperature typically varies from 65°F to 96°F and is rarely below 62°F or above 100°F.

Based on the beach/pool score, the best time of year to visit Dois Riachos for hot-weather activities is from early June to mid October.

The hot season lasts for 5.2 months, from October 17 to March 25, with an average daily high temperature above 94°F. The hottest month of the year in Dois Riachos is January, with an average high of 96°F and low of 72°F.

The cool season lasts for 2.5 months, from June 6 to August 21, with an average daily high temperature below 86°F. The coldest month of the year in Dois Riachos is July, with an average low of 66°F and high of 84°F.

In Dois Riachos, 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 Dois Riachos begins around May 26 and lasts for 4.8 months, ending around October 20.

The clearest month of the year in Dois Riachos is July, during which on average the sky is clear, mostly clear, or partly cloudy 75% of the time.

The cloudier part of the year begins around October 20 and lasts for 7.2 months, ending around May 26.

The cloudiest month of the year in Dois Riachos is April, during which on average the sky is overcast or mostly cloudy 57% 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 Dois Riachos varies significantly throughout the year.

The wetter season lasts 6.5 months, from January 30 to August 13, with a greater than 20% chance of a given day being a wet day. The month with the most wet days in Dois Riachos is June, with an average of 10.0 days with at least 0.04 inches of precipitation.

The drier season lasts 5.5 months, from August 13 to January 30. The month with the fewest wet days in Dois Riachos is October, with an average of 1.9 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 Dois Riachos is June, with an average of 10.0 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 35% on June 16.

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. Dois Riachos experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Dois Riachos. The month with the most rain in Dois Riachos is June, with an average rainfall of 2.4 inches.

The month with the least rain in Dois Riachos is November, with an average rainfall of 0.5 inches.

The length of the day in Dois Riachos does not vary substantially over the course of the year, staying within 40 minutes of 12 hours throughout. In 2024, the shortest day is June 20, with 11 hours, 35 minutes of daylight; the longest day is December 21, with 12 hours, 41 minutes of daylight.

The earliest sunrise is at 4:56 AM on November 15, and the latest sunrise is 49 minutes later at 5:45 AM on July 12. The earliest sunset is at 5:14 PM on May 26, and the latest sunset is 43 minutes later at 5:57 PM on January 27.

Daylight saving time (DST) is not observed in Dois Riachos 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.

Dois Riachos experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.3 months, from December 14 to July 24, during which time the comfort level is muggy, oppressive, or miserable at least 66% of the time. The month with the most muggy days in Dois Riachos is May, with 28.1 days that are muggy or worse.

The month with the fewest muggy days in Dois Riachos is September, with 18.2 days that are muggy or worse.

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 Dois Riachos experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from August 26 to February 8, with average wind speeds of more than 11.2 miles per hour. The windiest month of the year in Dois Riachos is November, with an average hourly wind speed of 12.5 miles per hour.

The calmer time of year lasts for 6.5 months, from February 8 to August 26. The calmest month of the year in Dois Riachos is April, with an average hourly wind speed of 9.8 miles per hour.

The predominant average hourly wind direction in Dois Riachos is from the east throughout the year.

To characterize how pleasant the weather is in Dois Riachos 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 Dois Riachos for general outdoor tourist activities is from mid June to early September, with a peak score in the last week of July.

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 Dois Riachos for hot-weather activities is from early June to mid October, with a peak score in the second week of September.

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).

Temperatures in Dois Riachos 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.

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.

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 3.7 months, from September 17 to January 7, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest month of the year in Dois Riachos is October, with an average of 7.5 kWh.

The darker period of the year lasts for 2.7 months, from May 7 to July 31, with an average daily incident shortwave energy per square meter below 5.8 kWh. The darkest month of the year in Dois Riachos is June, with an average of 5.4 kWh.

For the purposes of this report, the geographical coordinates of Dois Riachos are -9.392 deg latitude, -37.101 deg longitude, and 781 ft elevation.

The topography within 2 miles of Dois Riachos contains only modest variations in elevation, with a maximum elevation change of 390 feet and an average elevation above sea level of 820 feet. Within 10 miles contains only modest variations in elevation (1,755 feet). Within 50 miles contains very significant variations in elevation (3,586 feet).

The area within 2 miles of Dois Riachos is covered by cropland (47%), grassland (21%), trees (16%), and shrubs (16%), within 10 miles by cropland (45%) and grassland (20%), and within 50 miles by cropland (26%) and trees (24%).