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Spring Weather in Sirari Tanzania

Daily high temperatures are around 80°F, rarely falling below 73°F or exceeding 85°F. The highest daily average high temperature is 81°F on October 3.

Daily low temperatures are around 58°F, rarely falling below 55°F or exceeding 61°F. The highest daily average low temperature is 58°F on October 20.

For reference, on March 2, the hottest day of the year, temperatures in Sirari typically range from 58°F to 81°F, while on July 12, the coldest day of the year, they range from 56°F to 78°F.

Average High and Low Temperature in the Spring in Sirari

Average High and Low Temperature in the Spring in SirariSepOctNov55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FWinterSummerOct 181°FOct 181°F58°F58°FSep 180°FSep 180°F57°F57°FNov 3078°FNov 3078°F58°F58°FNov 180°FNov 180°F58°F58°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 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.

Average Hourly Temperature in the Spring in Sirari

Average Hourly Temperature in the Spring in SirariSepOctNov12 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 AMWinterSummercoolcoolcomfortablecomfortablewarm
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.

Marcala, Honduras (8,422 miles away) and Cascas, Peru (7,809 miles) are the far-away foreign places with temperatures most similar to Sirari (view comparison).

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The spring in Sirari experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 51% to 77%. The highest chance of overcast or mostly cloudy conditions is 79% on November 10.

The clearest day of the spring is September 1, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on April 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 83%, while on August 30, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 49%.

Cloud Cover Categories in the Spring in Sirari

Cloud Cover Categories in the Spring in SirariSepOctNov0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerAug 3049%Aug 3049%Nov 3023%Nov 3023%Oct 130%Oct 130%Nov 122%Nov 122%clearmostly clearpartly cloudymostly cloudyovercast
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 Sirari, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 21% and ending it at 42%.

For reference, the year's highest daily chance of a wet day is 51% on April 20, and its lowest chance is 11% on July 17.

Probability of Precipitation in the Spring in Sirari

Probability of Precipitation in the Spring in SirariSepOctNov0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%WinterSummerNov 2743%Nov 2743%Sep 121%Sep 121%Oct 122%Oct 122%Nov 135%Nov 135%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 spring in Sirari is very rapidly increasing, starting the season at 1.1 inches, when it rarely exceeds 2.7 inches or falls below 0.2 inches, and ending the season at 3.7 inches, when it rarely exceeds 9.1 inches or falls below 0.6 inches.

Average Monthly Rainfall in the Spring in Sirari

Average Monthly Rainfall in the Spring in SirariSepOctNov0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inWinterSummerSep 11.1 inSep 11.1 inNov 303.7 inNov 303.7 inOct 11.4 inOct 11.4 inNov 12.6 inNov 12.6 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 spring in Sirari, the length of the day is essentially constant. The shortest day of the spring is September 1, with 12 hours, 5 minutes of daylight and the longest day is November 30, with 12 hours, 11 minutes of daylight.

Hours of Daylight and Twilight in the Spring in Sirari

Hours of Daylight and Twilight in the Spring in SirariSepOctNov0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrWinterSummerSep 2212 hr, 6 minSep 2212 hr, 6 mindaydaydaydaynightSep 112 hr, 5 minSep 112 hr, 5 minNov 3012 hr, 11 minNov 3012 hr, 11 minNov 112 hr, 9 minNov 112 hr, 9 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 latest sunrise of the spring in Sirari is 6:39 AM on September 1 and the earliest sunrise is 19 minutes earlier at 6:20 AM on November 4.

The latest sunset is 6:44 PM on September 1 and the earliest sunset is 14 minutes earlier at 6:30 PM on October 30.

Daylight saving time is not observed in Sirari during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:34 AM and sets 12 hours, 12 minutes later, at 6:46 PM, while on June 20, the shortest day of the year, it rises at 6:42 AM and sets 12 hours, 3 minutes later, at 6:45 PM.

Sunrise & Sunset with Twilight in the Spring in Sirari

Sunrise & Sunset with Twilight in the Spring in SirariSepOctNov2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMWinterSummer6:20 AM6:20 AMNov 46:30 PMNov 46:30 PM6:39 AM6:39 AMSep 16:44 PMSep 16:44 PM6:25 AM6:25 AMNov 306:36 PMNov 306:36 PM6:28 AM6:28 AMOct 16:35 PMOct 16:35 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the spring. 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 Spring in Sirari

Solar Elevation and Azimuth in the Spring in SirariSepOctNov12 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 AMWinterSummer001020203030405050606070800010102030304040506060707080
northeastsouthwest
Solar elevation and azimuth in the the spring 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 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.

Moon Rise, Set & Phases in the Spring in Sirari

Moon Rise, Set & Phases in the Spring in SirariSepOctNov12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerAug 42:14 PMAug 42:14 PMAug 199:26 PMAug 199:26 PMSep 34:56 AMSep 34:56 AMSep 185:35 AMSep 185:35 AMOct 29:50 PMOct 29:50 PMOct 172:27 PMOct 172:27 PMNov 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 AM7:00 PM7:00 PM6:42 PM6:42 PM7:12 AM7:12 AM6:48 AM6:48 AM7:07 PM7:07 PM6:13 PM6:13 PM6:40 AM6:40 AM6:05 AM6:05 AM6:25 PM6:25 PM6:34 PM6:34 PM6:59 AM6:59 AM6:28 PM6:28 PM6:09 PM6:09 PM6:35 AM6:35 AM6:50 PM6:50 PM5:53 PM5:53 PM6:19 AM6:19 AM7:30 PM7:30 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 Sirari is essentially constant during the spring, remaining within 1% of 1% throughout.

The lowest chance of a muggy day during the spring is 0% on September 17.

For reference, on April 24, the muggiest day of the year, there are muggy conditions 4% of the time, while on July 13, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Spring in Sirari

Humidity Comfort Levels in the Spring in SirariSepOctNov0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%WinterSummerSep 170%Sep 170%Sep 10%Sep 10%Nov 301%Nov 301%Oct 10%Oct 10%Nov 10%Nov 10%humidhumidcomfortablecomfortabledrydrymuggymuggy
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 Sirari is decreasing during the spring, decreasing from 7.1 miles per hour to 5.3 miles per hour over the course of the season.

For reference, on May 23, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on December 6, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.

The highest daily average wind speed during the spring is 7.1 miles per hour on September 7.

Average Wind Speed in the Spring in Sirari

Average Wind Speed in the Spring in SirariSepOctNov0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphWinterSummerSep 77.1 mphSep 77.1 mphNov 305.3 mphNov 305.3 mphOct 17.0 mphOct 17.0 mphNov 16.2 mphNov 16.2 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Sirari throughout the spring is predominantly from the east, with a peak proportion of 65% on October 17.

Wind Direction in the Spring in Sirari

Wind Direction in the Spring in SirariSepOctNov0%100%20%80%40%60%60%40%80%20%100%0%WinterSummerwesteastnorthsouth
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 Sirari 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 Spring in Sirari

Time Spent in Various Temperature Bands and the Growing Season in the Spring in SirariSepOctNov0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummer100%Oct 16100%Oct 16coolcomfortablewarm
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 Sirari are very rapidly increasing during the spring, increasing by 1,569°F, from 1,004°F to 2,572°F, over the course of the season.

Growing Degree Days in the Spring in Sirari

Growing Degree Days in the Spring in SirariSepOctNov1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°F1,800°F1,800°F2,000°F2,000°F2,200°F2,200°F2,400°F2,400°F2,600°F2,600°FWinterSummerSep 11,004°FSep 11,004°FNov 302,572°FNov 302,572°FOct 11,532°FOct 11,532°FNov 12,083°FNov 12,083°F
The average growing degree days accumulated over the course of the spring, 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 Sirari is essentially constant during the spring, remaining within 0.4 kWh of 6.0 kWh throughout.

The highest average daily incident shortwave solar energy during the spring is 6.4 kWh on September 23. The lowest average daily incident shortwave solar energy during the spring is 5.7 kWh on November 16.

Average Daily Incident Shortwave Solar Energy in the Spring in Sirari

Average Daily Incident Shortwave Solar Energy in the Spring in SirariSepOctNov0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhWinterSummerSep 236.4 kWhSep 236.4 kWhNov 165.7 kWhNov 165.7 kWhSep 16.3 kWhSep 16.3 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 Sirari are -1.254 deg latitude, 34.476 deg longitude, and 5,509 ft elevation.

The topography within 2 miles of Sirari contains significant variations in elevation, with a maximum elevation change of 600 feet and an average elevation above sea level of 5,286 feet. Within 10 miles contains significant variations in elevation (1,693 feet). Within 50 miles contains very significant variations in elevation (3,593 feet).

The area within 2 miles of Sirari is covered by shrubs (54%) and cropland (46%), within 10 miles by cropland (52%) and shrubs (43%), and within 50 miles by cropland (31%) and shrubs (28%).

This report illustrates the typical weather in Sirari, 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 Sirari.

For each station, the records are corrected for the elevation difference between that station and Sirari 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 Sirari is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sirari and a given station.

The stations contributing to this reconstruction are:

  • Kisii Airport (HKKS, 59%, 46 mi, northeast, -610 ft elevation change)
  • Musoma Airport (HTMU, 41%, 50 mi, west, -1,745 ft elevation change)

To get a sense of how much these sources agree with each other, you can view a comparison of Sirari 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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