Climate and Average Weather Year Round in Monte Sião Brazil

In Monte Sião, the summers are long, warm, humid, 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 83°F and is rarely below 44°F or above 90°F.

Based on the tourism score, the best times of year to visit Monte Sião for warm-weather activities are from early April to mid June and from late July to early October.

The warm season lasts for 5.6 months, from October 13 to April 1, with an average daily high temperature above 81°F. The hottest month of the year in Monte Sião is February, with an average high of 83°F and low of 65°F.

The cool season lasts for 2.5 months, from May 13 to July 29, with an average daily high temperature below 75°F. The coldest month of the year in Monte Sião is June, with an average low of 52°F and high of 73°F.

In Monte Sião, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Monte Sião begins around April 2 and lasts for 6.3 months, ending around October 12.

The clearest month of the year in Monte Sião 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 5.7 months, ending around April 2.

The cloudiest month of the year in Monte Sião is January, during which on average the sky is overcast or mostly cloudy 75% 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 Monte Sião varies very significantly throughout the year.

The wetter season lasts 5.6 months, from October 14 to April 2, with a greater than 41% chance of a given day being a wet day. The month with the most wet days in Monte Sião is January, with an average of 21.8 days with at least 0.04 inches of precipitation.

The drier season lasts 6.4 months, from April 2 to October 14. The month with the fewest wet days in Monte Sião is July, with an average of 3.5 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 Monte Sião is January, with an average of 21.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 71% 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. Monte Sião experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Monte Sião. The month with the most rain in Monte Sião is January, with an average rainfall of 8.9 inches.

The month with the least rain in Monte Sião is July, with an average rainfall of 1.0 inches.

The length of the day in Monte Sião 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, 31 minutes of daylight.

The earliest sunrise is at 5:13 AM on November 27, and the latest sunrise is 1 hour, 34 minutes later at 6:46 AM on July 5. The earliest sunset is at 5:29 PM on June 5, and the latest sunset is 1 hour, 27 minutes later at 6:56 PM on January 15.

Daylight saving time (DST) is not observed in Monte Sião 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.

Monte Sião experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.0 months, from October 22 to April 23, during which time the comfort level is muggy, oppressive, or miserable at least 16% of the time. The month with the most muggy days in Monte Sião is January, with 19.2 days that are muggy or worse.

The month with the fewest muggy days in Monte Sião is July, with 0.0 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 Monte Sião experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.8 months, from July 11 to December 5, with average wind speeds of more than 5.6 miles per hour. The windiest month of the year in Monte Sião is September, with an average hourly wind speed of 6.5 miles per hour.

The calmer time of year lasts for 7.2 months, from December 5 to July 11. The calmest month of the year in Monte Sião is March, with an average hourly wind speed of 4.6 miles per hour.

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

The wind is most often from the east for 3.6 months, from February 18 to June 7 and for 5.6 months, from June 26 to December 13, with a peak percentage of 44% on August 26. The wind is most often from the north for 2.7 weeks, from June 7 to June 26 and for 2.2 months, from December 13 to February 18, with a peak percentage of 39% on June 22.

To characterize how pleasant the weather is in Monte Sião 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 times of year to visit Monte Sião for general outdoor tourist activities are from early April to mid June and from late July to early October, with a peak score in the last week of April.

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 Monte Sião for hot-weather activities are from late February to late April and from mid 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 Monte Sião 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 3.4 months, from September 24 to January 5, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Monte Sião is November, with an average of 6.4 kWh.

The darker period of the year lasts for 2.4 months, from May 11 to July 24, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest month of the year in Monte Sião is June, with an average of 4.2 kWh.

For the purposes of this report, the geographical coordinates of Monte Sião are -22.433 deg latitude, -46.572 deg longitude, and 2,812 ft elevation.

The topography within 2 miles of Monte Sião contains very significant variations in elevation, with a maximum elevation change of 1,368 feet and an average elevation above sea level of 2,969 feet. Within 10 miles contains very significant variations in elevation (2,244 feet). Within 50 miles contains large variations in elevation (4,997 feet).

The area within 2 miles of Monte Sião is covered by cropland (41%), trees (26%), grassland (19%), and shrubs (15%), within 10 miles by cropland (40%) and trees (29%), and within 50 miles by cropland (34%) and trees (30%).