Spring Weather in Ubatuba Brazil

Daily high temperatures increase by 4°F, from 80°F to 84°F, rarely falling below 70°F or exceeding 92°F.

Daily low temperatures increase by 7°F, from 66°F to 72°F, rarely falling below 61°F or exceeding 76°F.

For reference, on February 14, the hottest day of the year, temperatures in Ubatuba typically range from 76°F to 89°F, while on July 22, the coldest day of the year, they range from 63°F to 79°F.

The figure below shows you a compact characterization of the hourly average spring temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Havana, Cuba (4,082 miles away) is the far-away foreign place with temperatures most similar to Ubatuba (view comparison).

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The spring in Ubatuba experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 31% to 60%.

The clearest day of the spring is September 1, with clear, mostly clear, or partly cloudy conditions 69% of the time.

For reference, on January 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on August 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Ubatuba, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 29% and ending it at 57%.

For reference, the year's highest daily chance of a wet day is 69% on January 13, and its lowest chance is 18% on July 27.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring in Ubatuba is very rapidly increasing, starting the season at 2.4 inches, when it rarely exceeds 4.4 inches or falls below 0.6 inches, and ending the season at 6.4 inches, when it rarely exceeds 10.2 inches or falls below 3.2 inches.

Over the course of the spring in Ubatuba, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 49 minutes, implying an average daily increase of 1 minute, 12 seconds, and weekly increase of 8 minutes, 26 seconds.

The shortest day of the spring is September 1, with 11 hours, 39 minutes of daylight and the longest day is November 30, with 13 hours, 28 minutes of daylight.

The latest sunrise of the spring in Ubatuba is 6:10 AM on September 1 and the earliest sunrise is 1 hour, 5 minutes earlier at 5:05 AM on November 29.

The earliest sunset is 5:49 PM on September 1 and the latest sunset is 43 minutes later at 6:33 PM on November 30.

Daylight saving time is not observed in Ubatuba during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:11 AM and sets 13 hours, 35 minutes later, at 6:46 PM, while on June 20, the shortest day of the year, it rises at 6:41 AM and sets 10 hours, 41 minutes later, at 5:22 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the spring of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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.

The chance that a given day will be muggy in Ubatuba is very rapidly increasing during the spring, rising from 24% to 77% over the course of the season.

For reference, on February 21, the muggiest day of the year, there are muggy conditions 95% of the time, while on July 20, the least muggy day of the year, there are muggy conditions 11% of the time.

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 Ubatuba is essentially constant during the spring, remaining within 0.3 miles per hour of 7.0 miles per hour throughout.

For reference, on September 18, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on February 22, the calmest day of the year, the daily average wind speed is 5.7 miles per hour.

The highest daily average wind speed during the spring is 7.3 miles per hour on September 25.

The hourly average wind direction in Ubatuba throughout the spring is predominantly from the east, with a peak proportion of 49% on November 26.

Ubatuba is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Ubatuba is increasing during the spring, rising by 5°F, from 70°F to 74°F, over the course of the season.

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 Ubatuba 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.

The average accumulated growing degree days in Ubatuba are very rapidly increasing during the spring, increasing by 2,139°F, from 1,279°F to 3,418°F, over the course of the season.

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 in Ubatuba is increasing during the spring, rising by 1.3 kWh, from 5.1 kWh to 6.4 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the spring is 6.4 kWh on November 22.

For the purposes of this report, the geographical coordinates of Ubatuba are -23.434 deg latitude, -45.071 deg longitude, and 20 ft elevation.

The topography within 2 miles of Ubatuba contains very significant variations in elevation, with a maximum elevation change of 1,844 feet and an average elevation above sea level of 152 feet. Within 10 miles contains very significant variations in elevation (3,970 feet). Within 50 miles also contains extreme variations in elevation (6,260 feet).

The area within 2 miles of Ubatuba is covered by water (44%), trees (29%), and shrubs (21%), within 10 miles by trees (49%) and water (47%), and within 50 miles by water (56%) and trees (28%).