Climate and Average Weather Year Round in Giruá Brazil

In Giruá, the summers are long, warm, and muggy; the winters are short and cool; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 48°F to 86°F and is rarely below 35°F or above 92°F.

Based on the tourism score, the best times of year to visit Giruá for warm-weather activities are from late February to early May and from late September to mid December.

The hot season lasts for 4.2 months, from November 17 to March 25, with an average daily high temperature above 82°F. The hottest month of the year in Giruá is January, with an average high of 85°F and low of 67°F.

The cool season lasts for 2.8 months, from May 20 to August 14, with an average daily high temperature below 70°F. The coldest month of the year in Giruá is July, with an average low of 48°F and high of 66°F.

In Giruá, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Giruá begins around February 20 and lasts for 2.9 months, ending around May 16.

The clearest month of the year in Giruá is March, during which on average the sky is clear, mostly clear, or partly cloudy 65% of the time.

The cloudier part of the year begins around May 16 and lasts for 9.1 months, ending around February 20.

The cloudiest month of the year in Giruá is June, during which on average the sky is overcast or mostly cloudy 47% 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 Giruá varies throughout the year.

The wetter season lasts 6.8 months, from September 21 to April 15, with a greater than 37% chance of a given day being a wet day. The month with the most wet days in Giruá is February, with an average of 12.9 days with at least 0.04 inches of precipitation.

The drier season lasts 5.2 months, from April 15 to September 21. The month with the fewest wet days in Giruá is August, with an average of 8.8 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 Giruá is February, with an average of 12.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 47% on February 9.

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. Giruá experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Giruá. The month with the most rain in Giruá is October, with an average rainfall of 8.0 inches.

The month with the least rain in Giruá is August, with an average rainfall of 4.3 inches.

The length of the day in Giruá varies over the course of the year. In 2024, the shortest day is June 20, with 10 hours, 22 minutes of daylight; the longest day is December 21, with 13 hours, 56 minutes of daylight.

The earliest sunrise is at 5:32 AM on December 2, and the latest sunrise is 1 hour, 57 minutes later at 7:29 AM on July 2. The earliest sunset is at 5:48 PM on June 9, and the latest sunset is 1 hour, 50 minutes later at 7:38 PM on January 11.

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

Giruá experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.9 months, from October 7 to May 3, during which time the comfort level is muggy, oppressive, or miserable at least 21% of the time. The month with the most muggy days in Giruá is January, with 21.8 days that are muggy or worse.

The month with the fewest muggy days in Giruá is July, with 1.3 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 Giruá experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.3 months, from May 26 to December 5, with average wind speeds of more than 6.8 miles per hour. The windiest month of the year in Giruá is September, with an average hourly wind speed of 7.4 miles per hour.

The calmer time of year lasts for 5.7 months, from December 5 to May 26. The calmest month of the year in Giruá is February, with an average hourly wind speed of 6.1 miles per hour.

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

The wind is most often from the north for 2.1 months, from May 28 to August 1, with a peak percentage of 40% on June 20. The wind is most often from the east for 9.9 months, from August 1 to May 28, with a peak percentage of 44% on January 1.

To characterize how pleasant the weather is in Giruá 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 Giruá for general outdoor tourist activities are from late February to early May and from late September to mid December, with a peak score in the last week of March.

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 Giruá for hot-weather activities is from mid November to late March, with a peak score in the second week of January.

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).

The growing season in Giruá typically lasts for 11 months (338 days), from around July 22 to around June 26, rarely starting after August 26, or ending before May 28.

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.

Based on growing degree days alone, the first spring blooms in Giruá should appear around July 12, only rarely appearing before July 9 or after July 19.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from October 30 to February 13, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest month of the year in Giruá is December, with an average of 7.3 kWh.

The darker period of the year lasts for 3.0 months, from May 8 to August 9, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest month of the year in Giruá is June, with an average of 3.1 kWh.

For the purposes of this report, the geographical coordinates of Giruá are -28.028 deg latitude, -54.350 deg longitude, and 1,417 ft elevation.

The topography within 2 miles of Giruá contains only modest variations in elevation, with a maximum elevation change of 318 feet and an average elevation above sea level of 1,292 feet. Within 10 miles contains only modest variations in elevation (682 feet). Within 50 miles contains significant variations in elevation (1,677 feet).

The area within 2 miles of Giruá is covered by shrubs (36%), cropland (33%), trees (17%), and grassland (14%), within 10 miles by cropland (44%) and trees (21%), and within 50 miles by cropland (37%) and trees (26%).