Climate and Average Weather Year Round in Araras Brazil

In Araras, the summers are long, warm, muggy, wet, and mostly cloudy and the winters are short, cool, and mostly clear. Over the course of the year, the temperature typically varies from 51°F to 85°F and is rarely below 44°F or above 94°F.

Based on the tourism score, the best time of year to visit Araras for warm-weather activities is from early April to late September.

The hot season lasts for 5.9 months, from October 8 to April 4, with an average daily high temperature above 84°F. The hottest month of the year in Araras is February, with an average high of 85°F and low of 68°F.

The cool season lasts for 2.4 months, from May 14 to July 27, with an average daily high temperature below 78°F. The coldest month of the year in Araras is June, with an average low of 52°F and high of 76°F.

In Araras, 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 Araras begins around April 1 and lasts for 6.4 months, ending around October 12.

The clearest month of the year in Araras is August, during which on average the sky is clear, mostly clear, or partly cloudy 73% of the time.

The cloudier part of the year begins around October 12 and lasts for 5.6 months, ending around April 1.

The cloudiest month of the year in Araras is January, during which on average the sky is overcast or mostly cloudy 73% 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 Araras varies very significantly throughout the year.

The wetter season lasts 5.3 months, from October 21 to March 29, with a greater than 38% chance of a given day being a wet day. The month with the most wet days in Araras is January, with an average of 20.7 days with at least 0.04 inches of precipitation.

The drier season lasts 6.7 months, from March 29 to October 21. The month with the fewest wet days in Araras is July, 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 Araras is January, with an average of 20.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 68% on January 13.

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. Araras experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Araras. The month with the most rain in Araras is January, with an average rainfall of 8.7 inches.

The month with the least rain in Araras is July, with an average rainfall of 0.9 inches.

The length of the day in Araras varies over the course of the year. In 2024, the shortest day is June 20, with 10 hours, 46 minutes of daylight; the longest day is December 21, with 13 hours, 30 minutes of daylight.

The earliest sunrise is at 5:16 AM on November 28, and the latest sunrise is 1 hour, 33 minutes later at 6:49 AM on July 3. The earliest sunset is at 5:32 PM on June 5, and the latest sunset is 1 hour, 27 minutes later at 6:59 PM on January 15.

Daylight saving time (DST) is not observed in Araras 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.

Araras experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.7 months, from October 9 to April 29, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The month with the most muggy days in Araras is January, with 25.8 days that are muggy or worse.

The month with the fewest muggy days in Araras is July, with 0.2 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 Araras experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.8 months, from July 14 to December 7, with average wind speeds of more than 7.1 miles per hour. The windiest month of the year in Araras is September, with an average hourly wind speed of 8.3 miles per hour.

The calmer time of year lasts for 7.2 months, from December 7 to July 14. The calmest month of the year in Araras is March, with an average hourly wind speed of 5.9 miles per hour.

The predominant average hourly wind direction in Araras varies throughout the year.

The wind is most often from the east for 2.9 months, from March 6 to June 3 and for 1.8 months, from July 11 to September 6, with a peak percentage of 36% on August 8. The wind is most often from the north for 1.3 months, from June 3 to July 11 and for 3.4 months, from November 24 to March 6, with a peak percentage of 35% on June 23. The wind is most often from the south for 2.6 months, from September 6 to November 24, with a peak percentage of 36% on September 29.

To characterize how pleasant the weather is in Araras 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 Araras for general outdoor tourist activities is from early April to late September, with a peak score in the first week of May.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Araras for hot-weather activities are from early March to late April and from early October to late November, with a peak score in the second week of April.

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 Araras 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 3.5 months, from September 26 to January 9, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest month of the year in Araras is November, with an average of 6.5 kWh.

The darker period of the year lasts for 2.5 months, from May 11 to July 25, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest month of the year in Araras is June, with an average of 4.2 kWh.

For the purposes of this report, the geographical coordinates of Araras are -22.357 deg latitude, -47.384 deg longitude, and 2,080 ft elevation.

The topography within 2 miles of Araras contains only modest variations in elevation, with a maximum elevation change of 381 feet and an average elevation above sea level of 2,109 feet. Within 10 miles contains only modest variations in elevation (804 feet). Within 50 miles contains significant variations in elevation (2,946 feet).

The area within 2 miles of Araras is covered by shrubs (58%) and cropland (20%), within 10 miles by cropland (39%) and trees (23%), and within 50 miles by cropland (39%) and trees (24%).