Average Weather in Rujewa Tanzania

1. World
2. Tanzania
3. Mbeya
4. Mbarali district
5. Rujewa

In Rujewa, the wet season is overcast, the dry season is mostly clear, and it is warm year round. Over the course of the year, the temperature typically varies from 52°F to 88°F and is rarely below 47°F or above 93°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 Rujewa, 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 Rujewa begins around April 19 and lasts for 6.4 months, ending around October 31. On July 14, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 81% of the time, and overcast or mostly cloudy 19% of the time.

The cloudier part of the year begins around October 31 and lasts for 5.6 months, ending around April 19. On January 26, the cloudiest day of the year, the sky is overcast or mostly cloudy 86% of the time, and clear, mostly clear, or partly cloudy 14% 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 Rujewa varies very significantly throughout the year.

The wetter season lasts 4.6 months, from November 30 to April 18, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 65% on January 29.

The drier season lasts 7.4 months, from April 18 to November 30. The smallest chance of a wet day is 1% on August 25.

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 65% on January 29.

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. Rujewa experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.9 months, from October 19 to May 15, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 23, with an average total accumulation of 7.5 inches.

The rainless period of the year lasts for 5.1 months, from May 15 to October 19. The least rain falls around August 29, with an average total accumulation of 0.1 inches.

The length of the day in Rujewa does not vary substantially over the course of the year, staying within 38 minutes of 12 hours throughout. In 2017, the shortest day is June 21, with 11 hours, 37 minutes of daylight; the longest day is December 21, with 12 hours, 38 minutes of daylight.

The earliest sunrise is at 6:11 AM on November 15, and the latest sunrise is 47 minutes later at 6:58 AM on July 15. The earliest sunset is at 6:29 PM on May 26, and the latest sunset is 41 minutes later at 7:10 PM on January 28.

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

Rujewa experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.4 months, from December 9 to April 22, during which time the comfort level is muggy, oppressive, or miserable at least 6% of the time. The muggiest day of the year is February 9, with muggy conditions 24% of the time.

The least muggy day of the year is August 25, when muggy conditions are essentially unheard of.

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 Rujewa experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.9 months, from May 4 to November 30, with average wind speeds of more than 3.5 miles per hour. The windiest day of the year is September 27, with an average hourly wind speed of 5.1 miles per hour.

The calmer time of year lasts for 5.2 months, from November 30 to May 4. The calmest day of the year is February 20, with an average hourly wind speed of 2.0 miles per hour.

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

The wind is most often from the north for 1.4 months, from January 10 to February 21, with a peak percentage of 39% on January 20. The wind is most often from the east for 11 months, from February 21 to January 10, with a peak percentage of 45% on January 1.

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 2.6 months, from August 27 to November 16, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest day of the year is October 1, with an average of 7.6 kWh.

The darker period of the year lasts for 2.4 months, from December 23 to March 3, with an average daily incident shortwave energy per square meter below 5.7 kWh. The darkest day of the year is January 16, with an average of 5.2 kWh.

For the purposes of this report, the geographical coordinates of Rujewa are -8.700 deg latitude, 34.383 deg longitude, and 3,537 ft elevation.

The topography within 2 miles of Rujewa contains only modest variations in elevation, with a maximum elevation change of 203 feet and an average elevation above sea level of 3,540 feet. Within 10 miles contains only modest variations in elevation (1,260 feet). Within 50 miles contains very significant variations in elevation (6,539 feet).

The area within 2 miles of Rujewa is covered by grassland (42%), cropland (28%), and shrubs (28%), within 10 miles by shrubs (36%) and grassland (34%), and within 50 miles by shrubs (27%) and grassland (23%).

This report illustrates the typical weather in Rujewa, 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 is only a single weather station, Mbeya Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Rujewa.

At a distance of 104 kilometers from Rujewa, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

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

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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.