Weather Seasons

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El Ninos occur every two to seven years irregularly and tend to last for a single cycle. It is typical for these events to show signs of occurring during autumn, and then they strengthen over the winter and spring, with a drop off during the summer.

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  • What Makes the Seasons Change?

    Q: What Makes the Seasons Change?

    A: The Earth experiences seasons because its axis is tilted, and as it rotates, sometimes a region is tilted towards the sun. In the northern hemisphere, when the Earth is closest to the sun, the region will experience winter, and when it is furthest away, it will experience summer.
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  • What Are the Months for Each Season?

    Q: What Are the Months for Each Season?

    A: In the Northern Hemisphere, spring covers March, April and May; summer covers June, July and August; fall covers September, October and November; and winter covers December, January and February. There are no official allocations of the four seasons, though, and in the Southern Hemisphere, the seasons are reversed. When it's summer in the Northern Hemisphere, it is winter in the Southern Hemisphere, and when it is spring in the Northern Hemisphere, it is fall in the Southern Hemisphere. Many countries south of the equator, however, tend to have more tropical climates in which the evolution of the seasons is less evident.
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  • Is Sound Louder in Cold Weather?

    Q: Is Sound Louder in Cold Weather?

    A: Sound does not actually increase in amplitude, or loudness, in the cold. However, two factors come together and make people perceive sound as much louder in the cold: the cold itself and the snow that often comes with it.
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  • How Do Jet Streams Affect the Weather?

    Q: How Do Jet Streams Affect the Weather?

    A: Jet streams, which are rapidly moving ribbons of air 6 to 9 miles above the Earth, influence the weather by separating warm and cold air and pushing weather systems around the globe. The movement of a jet stream affects temperatures and precipitation. Meteorologists describe jet streams as resembling rivers in their flow.
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  • When Does Hurricane Season Start?

    Q: When Does Hurricane Season Start?

    A: Geography dictates the start of hurricane season. Hurricane season in the Atlantic starts June 1. Hurricane season in the North Pacific begins May 15. According to the U.S. National Weather Service, 99 percent of all hurricanes occur within these periods.
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  • Why Does It Hail in the Summer?

    Q: Why Does It Hail in the Summer?

    A: Hail occurs in the summer when strong thunderstorm updrafts carry raindrops high into the atmosphere, where temperatures are below freezing, according to the Atmospheric Sciences Department of Texas A&M University. This causes the water to freeze into pellets of ice, forming hailstones. These pellets may rise and fall multiple times in the storm before falling to the ground, resulting in hailstones of varying sizes.
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  • Q: What Is a Climate Map of Africa?

    A: A climate map of Africa is a map showing climate zones of Africa. The continent has a variety of climate zones ranging from tropical to subarctic on the continent’s highest peaks.
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  • Q: When Is Hurricane Season in the Caribbean?

    A: The Caribbean hurricane season follows the traditional Atlantic season, which officially lasts between the start of June and the end of November. The average hurricane season in the Atlantic region typically generates between five to seven hurricane storms with a concentrated peak around September.
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  • Q: What Is a Continental Polar Air Mass?

    A: A continental polar air mass is an air mass that is both cold and dry. The reason for this is that the source of the air mass is a continental region.
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  • Q: Why Does Temperature Change During the Seasons?

    A: Temperature changes throughout the year are caused by the tilt of the Earth on its axis and its revolution around the sun that allows sunlight to strike more directly. Depending on which hemisphere is facing the sun at a given time, that hemisphere experiences either summer or winter.
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  • Q: What Causes Weather?

    A: Weather is caused by uneven heating on the surface of the Earth, which results in atmospheric change. Differences in temperature are caused by the Sun heating parts of the Earth more than others. Clouds, rain and winds are all caused by these temperature differences.
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  • Q: When Do the Seasons Start and Finish?

    A: Seasons start and finish with the equinoxes and the solstices. For example, summer begins with the summer solstice, which occurs in the northern hemisphere at around June 21. During the summer solstice, the hours of daylight are greater than the hours of darkness.
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  • Which Months Are Considered the Summer in Brazil?

    Q: Which Months Are Considered the Summer in Brazil?

    A: Summer in Brazil consists of the months of December, January and February. This is due to the fact that Brazil is located below the equator in the Southern hemisphere. During these months, the Southern hemisphere is tilted toward the sun, while the Northern hemisphere is tilted away from the sun and experiences winter.
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  • Q: When Is Hurricane Season in the Bahamas?

    A: Hurricane season in the Bahamas officially begins on June 1st each year and runs to November 30th. According to the Embassy of the United States, the peak season usually occurs in August, September and early October.
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  • Q: How Are Seasons Formed?

    A: According to the National Weather Service, seasons are cause by the Earth's axial tilt, which is 23.5 degrees off the vertical. During various points in its orbit, the planet's north pole points toward or away from the sun to an extent. When it points toward the sun, the northern hemisphere receives more direct sunlight, and when it points away, the hemisphere receives less energy from the sun, causing the seasons.
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  • Q: When in the Best Time to View Fall Foliage?

    A: The best time to view fall foliage depends on latitude and geographic region but generally runs from late September to late October. In the Northeast, the leaves begin changing around the time of the autumnal equinox in the northwestern regions of New York, Vermont, New Hampshire and Maine.
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  • What Is the Climate Like in a Tropical Rain Forest ?

    Q: What Is the Climate Like in a Tropical Rain Forest ?

    A: In the tropical rain forest biome, the climate is usually quite steady throughout the year, with average temperatures between 70 and 85 degrees Fahrenheit. Tropical rain forests also have very high average humidity, with an average high between 77 and 88 percent humidity throughout the year.
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  • Q: When Is Hurricane Season in Mexico?

    A: On the Atlantic Ocean side of Mexico, hurricane season lasts from June 1 to Nov. 30. The official hurricane season on the Pacific Ocean side of Mexico begins on May 15 and also ends on Nov. 30.
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  • When Does El Nino Occur?

    Q: When Does El Nino Occur?

    A: El Ninos occur every two to seven years irregularly and tend to last for a single cycle. It is typical for these events to show signs of occurring during autumn, and then they strengthen over the winter and spring, with a drop off during the summer.
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  • Q: What Is the Weather in Negril, Jamaica in November?

    A: The weather in Negril, Jamaica, in November is pleasant, with an average temperature of 79 degrees Fahrenheit. The temperature generally does not drop below 73 F in the night, nor does it exceed 84 F during the day.
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  • What Is 27 Degrees Celsius in Degrees Fahrenheit?

    Q: What Is 27 Degrees Celsius in Degrees Fahrenheit?

    A: Twenty-seven degrees Celsius is equivalent to 80.6 degrees Fahrenheit. To convert from Celsius to Fahrenheit, multiply the degrees Celsius by nine, divide by five and add 32.
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