Climate and Average Weather Year Round in Nansio Tanzania

In Nansio, the wet season is muggy and overcast, the dry season is windy and partly cloudy, and it is warm year round. Over the course of the year, the temperature typically varies from 66°F to 81°F and is rarely below 63°F or above 85°F.

Based on the tourism score, the best time of year to visit Nansio for warm-weather activities is from mid June to mid September.

The temperature in Nansio varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

In Nansio, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Nansio begins around May 30 and lasts for 3.9 months, ending around September 25.

The clearest month of the year in Nansio is August, during which on average the sky is clear, mostly clear, or partly cloudy 59% of the time.

The cloudier part of the year begins around September 25 and lasts for 8.1 months, ending around May 30.

The cloudiest month of the year in Nansio is April, during which on average the sky is overcast or mostly cloudy 78% 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 Nansio varies very significantly throughout the year.

The wetter season lasts 7.5 months, from September 29 to May 15, with a greater than 35% chance of a given day being a wet day. The month with the most wet days in Nansio is November, with an average of 18.5 days with at least 0.04 inches of precipitation.

The drier season lasts 4.5 months, from May 15 to September 29. The month with the fewest wet days in Nansio is July, with an average of 2.0 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Nansio is November, with an average of 18.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 64% on November 16.

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. Nansio experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Nansio. The month with the most rain in Nansio is April, with an average rainfall of 5.5 inches.

The month with the least rain in Nansio is July, with an average rainfall of 0.4 inches.

The length of the day in Nansio does not vary substantially over the course of the year, staying within 14 minutes of 12 hours throughout. In 2024, the shortest day is June 20, with 12 hours, 0 minutes of daylight; the longest day is December 21, with 12 hours, 15 minutes of daylight.

The earliest sunrise is at 6:25 AM on November 7, and the latest sunrise is 31 minutes later at 6:56 AM on February 17. The earliest sunset is at 6:36 PM on October 29, and the latest sunset is 31 minutes later at 7:07 PM on February 7.

Daylight saving time (DST) is not observed in Nansio during 2024.

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

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.

Nansio experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 9.5 months, from August 20 to June 5, during which time the comfort level is muggy, oppressive, or miserable at least 21% of the time. The month with the most muggy days in Nansio is April, with 19.5 days that are muggy or worse.

The month with the fewest muggy days in Nansio is July, with 2.4 days that are muggy or worse.

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

The windier part of the year lasts for 4.5 months, from May 1 to September 17, with average wind speeds of more than 9.3 miles per hour. The windiest month of the year in Nansio is July, with an average hourly wind speed of 11.4 miles per hour.

The calmer time of year lasts for 7.5 months, from September 17 to May 1. The calmest month of the year in Nansio is January, with an average hourly wind speed of 7.1 miles per hour.

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

The wind is most often from the south for 1.3 weeks, from February 21 to March 1 and for 2.1 months, from June 2 to August 4, with a peak percentage of 52% on July 3. The wind is most often from the east for 3.0 months, from March 1 to June 2 and for 2.1 months, from August 4 to October 7, with a peak percentage of 51% on May 12. The wind is most often from the north for 3.6 months, from October 7 to January 25, with a peak percentage of 35% on January 1.

To characterize how pleasant the weather is in Nansio throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Nansio for general outdoor tourist activities is from mid June to mid September, with a peak score in the last week of July.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Nansio for hot-weather activities is from late May to late September, with a peak score in the last week of August.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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 Nansio 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.

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.

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 2.1 months, from July 27 to September 29, with an average daily incident shortwave energy per square meter above 6.6 kWh. The brightest month of the year in Nansio is September, with an average of 6.8 kWh.

The darker period of the year lasts for 1.7 months, from November 2 to December 26, with an average daily incident shortwave energy per square meter below 5.8 kWh. The darkest month of the year in Nansio is November, with an average of 5.6 kWh.

For the purposes of this report, the geographical coordinates of Nansio are -2.133 deg latitude, 33.050 deg longitude, and 3,720 ft elevation.

The topography within 2 miles of Nansio contains only modest variations in elevation, with a maximum elevation change of 246 feet and an average elevation above sea level of 3,753 feet. Within 10 miles contains only modest variations in elevation (633 feet). Within 50 miles contains significant variations in elevation (1,601 feet).

The area within 2 miles of Nansio is covered by water (70%), cropland (15%), and trees (12%), within 10 miles by water (64%) and cropland (17%), and within 50 miles by water (66%) and cropland (17%).