Average Weather in Mvomero Tanzania

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In Mvomero, the wet season is oppressive and mostly cloudy, the dry season is muggy and mostly clear, and it is hot year round. Over the course of the year, the temperature typically varies from 66°F to 93°F and is rarely below 63°F or above 97°F.

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

In Mvomero, 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 Mvomero begins around May 8 and lasts for 6.5 months, ending around November 23. On September 1, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.

The cloudier part of the year begins around November 23 and lasts for 5.5 months, ending around May 8. On February 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% 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 Mvomero varies very significantly throughout the year.

The wetter season lasts 6.3 months, from November 8 to May 18, with a greater than 37% chance of a given day being a wet day. The chance of a wet day peaks at 66% on April 19.

The drier season lasts 5.7 months, from May 18 to November 8. The smallest chance of a wet day is 6% on July 9.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 66% on April 19.

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. Mvomero experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Mvomero. The most rain falls during the 31 days centered around April 16, with an average total accumulation of 7.2 inches.

The least rain falls around August 1, with an average total accumulation of 0.5 inches.

The length of the day in Mvomero does not vary substantially over the course of the year, staying within 29 minutes of 12 hours throughout. In 2017, the shortest day is June 21, with 11 hours, 46 minutes of daylight; the longest day is December 21, with 12 hours, 29 minutes of daylight.

The earliest sunrise is at 5:57 AM on November 13, and the latest sunrise is 40 minutes later at 6:37 AM on July 17. The earliest sunset is at 6:16 PM on May 23, and the latest sunset is 34 minutes later at 6:50 PM on January 31.

Daylight saving time (DST) is not observed in Mvomero during 2017.

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.

Mvomero experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 9.6 months, from September 12 to June 30, during which time the comfort level is muggy, oppressive, or miserable at least 78% of the time. The muggiest day of the year is April 10, with muggy conditions 100% of the time.

The least muggy day of the year is July 23, with muggy conditions 70% 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 Mvomero experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.4 months, from April 27 to November 9, with average wind speeds of more than 3.9 miles per hour. The windiest day of the year is September 1, with an average hourly wind speed of 4.7 miles per hour.

The calmer time of year lasts for 5.6 months, from November 9 to April 27. The calmest day of the year is March 26, with an average hourly wind speed of 3.1 miles per hour.

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

The wind is most often from the east for 1.9 months, from February 14 to April 10 and for 4.3 months, from August 16 to December 26, with a peak percentage of 89% on November 3. The wind is most often from the south for 4.2 months, from April 10 to August 16, with a peak percentage of 85% on June 6. The wind is most often from the north for 1.6 months, from December 26 to February 14, with a peak percentage of 54% on January 1.

Mvomero 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.5 months, from February 13 to April 28, with an average temperature above 83°F. The day of the year with the warmest water is March 24, with an average temperature of 85°F.

The time of year with cooler water lasts for 3.0 months, from July 2 to October 1, with an average temperature below 79°F. The day of the year with the coolest water is August 13, with an average temperature of 78°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 2.0 months, from September 13 to November 14, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is October 17, with an average of 7.3 kWh.

The darker period of the year lasts for 4.6 months, from March 9 to July 27, with an average daily incident shortwave energy per square meter below 5.8 kWh. The darkest day of the year is April 6, with an average of 5.5 kWh.

For the purposes of this report, the geographical coordinates of Mvomero are -6.250 deg latitude, 38.667 deg longitude, and 128 ft elevation.

The topography within 2 miles of Mvomero contains only modest variations in elevation, with a maximum elevation change of 384 feet and an average elevation above sea level of 156 feet. Within 10 miles contains only modest variations in elevation (1,145 feet). Within 50 miles contains very significant variations in elevation (2,867 feet).

The area within 2 miles of Mvomero is covered by trees (60%), herbaceous vegetation (19%), and shrubs (18%), within 10 miles by trees (64%) and shrubs (18%), and within 50 miles by trees (35%) and water (22%).

This report illustrates the typical weather in Mvomero, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Mvomero.

For each station, the records are corrected for the elevation difference between that station and Mvomero according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Mvomero is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mvomero and a given station.

The stations contributing to this reconstruction are: Abeid Amani Karume International Airport (54%, 62 kilometers, east); Julius Nyerere International Airport (30%, 92 kilometers, southeast); and Morogoro (16%, 130 kilometers, southwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.