Climate and Average Weather Year Round in Pio IX Brazil

In Pio IX, the wet season is muggy and overcast, the dry season is windy and partly cloudy, and it is hot year round. Over the course of the year, the temperature typically varies from 66°F to 98°F and is rarely below 63°F or above 100°F.

Based on the beach/pool score, the best time of year to visit Pio IX for hot-weather activities is from late May to early October.

The hot season lasts for 3.1 months, from September 1 to December 6, with an average daily high temperature above 95°F. The hottest month of the year in Pio IX is October, with an average high of 97°F and low of 72°F.

The cool season lasts for 2.7 months, from February 23 to May 15, with an average daily high temperature below 87°F. The coldest month of the year in Pio IX is April, with an average low of 69°F and high of 85°F.

In Pio IX, 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 Pio IX begins around May 28 and lasts for 4.5 months, ending around October 13.

The clearest month of the year in Pio IX is July, during which on average the sky is clear, mostly clear, or partly cloudy 72% of the time.

The cloudier part of the year begins around October 13 and lasts for 7.5 months, ending around May 28.

The cloudiest month of the year in Pio IX is March, during which on average the sky is overcast or mostly cloudy 74% 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 Pio IX varies very significantly throughout the year.

The wetter season lasts 4.0 months, from December 28 to April 30, with a greater than 28% chance of a given day being a wet day. The month with the most wet days in Pio IX is March, with an average of 16.7 days with at least 0.04 inches of precipitation.

The drier season lasts 8.0 months, from April 30 to December 28. The month with the fewest wet days in Pio IX is August, with an average of 0.2 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 Pio IX is March, with an average of 16.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 56% on March 15.

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. Pio IX experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.7 months, from November 8 to May 30, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Pio IX is March, with an average rainfall of 5.3 inches.

The rainless period of the year lasts for 5.3 months, from May 30 to November 8. The month with the least rain in Pio IX is August, with an average rainfall of 0.0 inches.

The length of the day in Pio IX does not vary substantially over the course of the year, staying within 31 minutes of 12 hours throughout. In 2024, the shortest day is June 20, with 11 hours, 44 minutes of daylight; the longest day is December 21, with 12 hours, 31 minutes of daylight.

The earliest sunrise is at 5:14 AM on November 13, and the latest sunrise is 41 minutes later at 5:55 AM on July 16. The earliest sunset is at 5:32 PM on May 23, and the latest sunset is 36 minutes later at 6:07 PM on January 31.

Daylight saving time (DST) is not observed in Pio IX 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.

Pio IX experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.0 months, from December 12 to June 10, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The month with the most muggy days in Pio IX is March, with 26.7 days that are muggy or worse.

The month with the fewest muggy days in Pio IX is August, with 0.4 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 Pio IX experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.5 months, from June 2 to December 19, with average wind speeds of more than 10.0 miles per hour. The windiest month of the year in Pio IX is September, with an average hourly wind speed of 12.5 miles per hour.

The calmer time of year lasts for 5.5 months, from December 19 to June 2. The calmest month of the year in Pio IX is March, with an average hourly wind speed of 7.5 miles per hour.

The predominant average hourly wind direction in Pio IX is from the east throughout the year.

To characterize how pleasant the weather is in Pio IX 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 Pio IX for general outdoor tourist activities is from early June to mid August, with a peak score in the second 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 Pio IX for hot-weather activities is from late May to early October, with a peak score in the last week of July.

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 Pio IX 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 2.7 months, from August 31 to November 19, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest month of the year in Pio IX is October, with an average of 7.5 kWh.

The darker period of the year lasts for 4.4 months, from February 22 to July 2, with an average daily incident shortwave energy per square meter below 5.9 kWh. The darkest month of the year in Pio IX is April, with an average of 5.6 kWh.

For the purposes of this report, the geographical coordinates of Pio IX are -6.838 deg latitude, -40.579 deg longitude, and 1,634 ft elevation.

The topography within 2 miles of Pio IX contains only modest variations in elevation, with a maximum elevation change of 453 feet and an average elevation above sea level of 1,707 feet. Within 10 miles contains only modest variations in elevation (866 feet). Within 50 miles contains very significant variations in elevation (2,123 feet).

The area within 2 miles of Pio IX is covered by shrubs (69%), trees (16%), and grassland (10%), within 10 miles by shrubs (79%) and trees (11%), and within 50 miles by shrubs (60%) and trees (18%).