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Summer Weather in Rujewa Tanzania

Daily high temperatures decrease by 5°F, from 87°F to 82°F, rarely falling below 77°F or exceeding 93°F.

Daily low temperatures are around 67°F, rarely falling below 64°F or exceeding 70°F.

For reference, on November 3, the hottest day of the year, temperatures in Rujewa typically range from 67°F to 89°F, while on June 26, the coldest day of the year, they range from 54°F to 82°F.

Average High and Low Temperature in the Summer in Rujewa

Average High and Low Temperature in the Summer in RujewaDecJanFeb60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°FSpringFallDec 187°FDec 187°F67°F67°FFeb 2882°FFeb 2882°F66°F66°FJan 183°FJan 183°F67°F67°FFeb 182°FFeb 182°F67°F67°F
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average summer 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.

Average Hourly Temperature in the Summer in Rujewa

Average Hourly Temperature in the Summer in RujewaDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFallcomfortablecomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Unidad Habitacional 10 de Abril, Mexico (9,246 miles away) and Nuporanga, Brazil (5,508 miles) are the far-away foreign places with temperatures most similar to Rujewa (view comparison).

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The summer in Rujewa experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 66% to 80%. The highest chance of overcast or mostly cloudy conditions is 86% on January 30.

The clearest day of the summer is December 1, with clear, mostly clear, or partly cloudy conditions 34% of the time.

For reference, on January 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 86%, while on July 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 81%.

Cloud Cover Categories in the Summer in Rujewa

Cloud Cover Categories in the Summer in RujewaDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallJul 1381%Jul 1381%Dec 134%Dec 134%Feb 2820%Feb 2820%Jan 116%Jan 116%Feb 114%Feb 114%clearpartly cloudymostly cloudyovercastmostly clear
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rujewa, the chance of a wet day over the course of the summer is very rapidly increasing, starting the season at 36% and ending it at 56%.

For reference, the year's highest daily chance of a wet day is 65% on February 3, and its lowest chance is 1% on August 25.

Probability of Precipitation in the Summer in Rujewa

Probability of Precipitation in the Summer in RujewaDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%SpringFallJan 2965%Jan 2965%Dec 136%Dec 136%Feb 2856%Feb 2856%Jan 160%Jan 160%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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 summer in Rujewa is very rapidly increasing, starting the season at 4.0 inches, when it rarely exceeds 8.1 inches or falls below 0.8 inches, and ending the season at 6.1 inches, when it rarely exceeds 10.7 inches or falls below 2.4 inches.

The highest average 31-day accumulation is 7.5 inches on January 23.

Average Monthly Rainfall in the Summer in Rujewa

Average Monthly Rainfall in the Summer in RujewaDecJanFeb0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inSpringFallJan 237.5 inJan 237.5 inDec 14.0 inDec 14.0 inFeb 286.1 inFeb 286.1 inJan 17.2 inJan 17.2 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of the summer in Rujewa, the length of the day is gradually decreasing. From the start to the end of the season, the length of the day decreases by 19 minutes, implying an average daily decrease of 13 seconds, and weekly decrease of 1 minute, 31 seconds.

The shortest day of the summer is February 28, with 12 hours, 16 minutes of daylight and the longest day is December 22, with 12 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in the Summer in Rujewa

Hours of Daylight and Twilight in the Summer in RujewaDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSpringFallDec 2112 hr, 38 minDec 2112 hr, 38 mindaydaydaydaynightFeb 2812 hr, 16 minFeb 2812 hr, 16 minFeb 112 hr, 29 minFeb 112 hr, 29 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the summer in Rujewa is 6:13 AM on December 1 and the latest sunrise is 33 minutes later at 6:46 AM on February 28.

The earliest sunset is 6:49 PM on December 1 and the latest sunset is 21 minutes later at 7:10 PM on January 27.

Daylight saving time is not observed in Rujewa during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:21 AM and sets 12 hours, 38 minutes later, at 6:59 PM, while on June 20, the shortest day of the year, it rises at 6:55 AM and sets 11 hours, 37 minutes later, at 6:32 PM.

Sunrise & Sunset with Twilight in the Summer in Rujewa

Sunrise & Sunset with Twilight in the Summer in RujewaDecJanFeb2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSpringFall6:13 AM6:13 AMDec 16:49 PMDec 16:49 PM6:39 AM6:39 AMJan 277:10 PMJan 277:10 PM6:46 AM6:46 AMFeb 287:03 PMFeb 287:03 PM6:27 AM6:27 AMJan 17:04 PMJan 17:04 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the summer. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

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.

Solar Elevation and Azimuth in the Summer in Rujewa

Solar Elevation and Azimuth in the Summer in RujewaDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFall0010202030304050506060708000101020303040405060607070
northeastsouthwest
Solar elevation and azimuth in the the summer of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the summer 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.

Moon Rise, Set & Phases in the Summer in Rujewa

Moon Rise, Set & Phases in the Summer in RujewaDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSpringFallNov 13:48 PMNov 13:48 PMNov 1612:29 AMNov 1612:29 AMDec 19:22 AMDec 19:22 AMDec 1512:02 PMDec 1512:02 PMDec 311:28 AMDec 311:28 AMJan 141:28 AMJan 141:28 AMJan 293:37 PMJan 293:37 PMFeb 124:54 PMFeb 124:54 PMFeb 283:45 AMFeb 283:45 AMMar 149:55 AMMar 149:55 AMMar 291:58 PMMar 291:58 PM6:38 PM6:38 PM6:22 PM6:22 PM6:21 AM6:21 AM7:07 PM7:07 PM6:09 PM6:09 PM6:02 AM6:02 AM7:46 PM7:46 PM6:57 PM6:57 PM6:50 AM6:50 AM6:24 AM6:24 AM7:21 PM7:21 PM7:14 PM7:14 PM7:18 AM7:18 AM7:32 PM7:32 PM6:31 PM6:31 PM6:44 AM6:44 AM6:51 PM6:51 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 Rujewa is rapidly increasing during the summer, rising from 3% to 20% over the course of the season.

The highest chance of a muggy day during the summer is 21% on February 9.

For reference, on February 9, the muggiest day of the year, there are muggy conditions 21% of the time, while on June 21, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Summer in Rujewa

Humidity Comfort Levels in the Summer in RujewaDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SpringFallFeb 921%Feb 921%Dec 13%Dec 13%Feb 2820%Feb 2820%Jan 116%Jan 116%muggymuggyhumidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 is rapidly decreasing during the summer, decreasing from 6.4 miles per hour to 3.8 miles per hour over the course of the season.

For reference, on September 26, the windiest day of the year, the daily average wind speed is 9.4 miles per hour, while on February 20, the calmest day of the year, the daily average wind speed is 3.8 miles per hour.

The lowest daily average wind speed during the summer is 3.8 miles per hour on February 20.

Average Wind Speed in the Summer in Rujewa

Average Wind Speed in the Summer in RujewaDecJanFeb0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphSpringFallFeb 203.8 mphFeb 203.8 mphDec 16.4 mphDec 16.4 mphJan 14.5 mphJan 14.5 mphFeb 13.9 mphFeb 13.9 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Rujewa during the summer is predominantly out of the east from December 1 to January 10 and from February 20 to February 28 and the north from January 10 to February 20.

Wind Direction in the Summer in Rujewa

Wind Direction in the Summer in RujewaENEDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%SpringFalleastnorthwestsouth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

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 Rujewa 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.

Time Spent in Various Temperature Bands and the Growing Season in the Summer in Rujewa

Time Spent in Various Temperature Bands and the Growing Season in the Summer in RujewaDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFall100%Jan 15100%Jan 15comfortablewarmhotcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Rujewa are very rapidly increasing during the summer, increasing by 2,156°F, from 3,499°F to 5,656°F, over the course of the season.

Growing Degree Days in the Summer in Rujewa

Growing Degree Days in the Summer in RujewaDecJanFeb3,500°F3,500°F4,000°F4,000°F4,500°F4,500°F5,000°F5,000°F5,500°F5,500°FSpringFallDec 13,499°FDec 13,499°FFeb 285,656°FFeb 285,656°FJan 14,280°FJan 14,280°F
The average growing degree days accumulated over the course of the summer, with 25th to 75th and 10th to 90th percentile bands.

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 Rujewa is gradually decreasing during the summer, falling by 1.0 kWh, from 6.6 kWh to 5.6 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the summer is 5.2 kWh on January 17.

Average Daily Incident Shortwave Solar Energy in the Summer in Rujewa

Average Daily Incident Shortwave Solar Energy in the Summer in RujewaDecJanFeb0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSpringFallJan 175.2 kWhJan 175.2 kWhDec 16.6 kWhDec 16.6 kWhFeb 285.6 kWhFeb 285.6 kWhJan 15.3 kWhJan 15.3 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Rujewa.

For each station, the records are corrected for the elevation difference between that 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.

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

The stations contributing to this reconstruction are:

  • Mbeya Airport (HTMB, 67%, 65 mi, west, 2,064 ft elevation change)
  • Iringa Airport (HTIR, 33%, 118 mi, northeast, 1,138 ft elevation change)

To get a sense of how much these sources agree with each other, you can view a comparison of Rujewa and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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