Climate and Average Weather Year Round in Chissamba Angola
In Chissamba, 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 48°F to 91°F and is rarely below 43°F or above 95°F.
Based on the beach/pool score, the best time of year to visit Chissamba for hot-weather activities is from mid August to early October.
Climate in Chissamba
Average Temperature in Chissamba
The hot season lasts for 1.6 months, from August 21 to October 9, with an average daily high temperature above 88°F. The hottest day of the year is September 12, with an average high of 91°F and low of 61°F.
The cool season lasts for 6.2 months, from November 20 to May 26, with an average daily high temperature below 80°F. The coldest day of the year is July 1, with an average low of 48°F and high of 81°F.
Average High and Low Temperature in Chissamba
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.
Average Hourly Temperature in Chissamba
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
In Chissamba, 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 Chissamba begins around May 1 and lasts for 5.1 months, ending around October 4. On June 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 85% of the time, and overcast or mostly cloudy 15% of the time.
The cloudier part of the year begins around October 4 and lasts for 6.9 months, ending around May 1. On December 23, the cloudiest day of the year, the sky is overcast or mostly cloudy 85% of the time, and clear, mostly clear, or partly cloudy 15% of the time.
Cloud Cover Categories in Chissamba
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Chissamba varies very significantly throughout the year.
The wetter season lasts 6.2 months, from October 6 to April 12, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 68% on November 27.
The drier season lasts 5.8 months, from April 12 to October 6. The smallest chance of a wet day is 0% on June 21.
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 68% on November 27.
Daily Chance of Precipitation in Chissamba
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. Chissamba experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 7.9 months, from September 9 to May 7, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 28, with an average total accumulation of 5.8 inches.
The rainless period of the year lasts for 4.1 months, from May 7 to September 9. The least rain falls around July 6, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall in Chissamba
The length of the day in Chissamba does not vary substantially over the course of the year, staying within 50 minutes of 12 hours throughout. In 2021, the shortest day is June 21, with 11 hours, 25 minutes of daylight; the longest day is December 21, with 12 hours, 51 minutes of daylight.
Hours of Daylight and Twilight in Chissamba
The earliest sunrise is at 5:14 AM on November 20, and the latest sunrise is 58 minutes later at 6:12 AM on July 11. The earliest sunset is at 5:32 PM on May 30, and the latest sunset is 51 minutes later at 6:23 PM on January 24.
Daylight saving time (DST) is not observed in Chissamba during 2021.
Sunrise & Sunset with Twilight in Chissamba
The figure below presents a compact representation of key lunar data for 2021. 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.
Moon Rise, Set & Phases in Chissamba
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.
Chissamba experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.5 months, from December 4 to April 21, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The muggiest day of the year is March 18, with muggy conditions 12% of the time.
The least muggy day of the year is July 18, when muggy conditions are essentially unheard of.
Humidity Comfort Levels in Chissamba
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Chissamba experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.8 months, from April 17 to October 12, with average wind speeds of more than 6.5 miles per hour. The windiest day of the year is August 12, with an average hourly wind speed of 7.7 miles per hour.
The calmer time of year lasts for 6.2 months, from October 12 to April 17. The calmest day of the year is November 25, with an average hourly wind speed of 5.2 miles per hour.
Average Wind Speed in Chissamba
The predominant average hourly wind direction in Chissamba varies throughout the year.
The wind is most often from the east for 6.9 months, from March 6 to October 3, with a peak percentage of 83% on July 3. The wind is most often from the north for 2.6 months, from October 3 to December 22, with a peak percentage of 42% on October 10. The wind is most often from the west for 2.5 months, from December 22 to March 6, with a peak percentage of 41% on January 1.
Wind Direction in Chissamba
Best Time of Year to Visit
To characterize how pleasant the weather is in Chissamba 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 Chissamba for general outdoor tourist activities is from early May to early September, with a peak score in the third week of July.
Tourism Score in Chissamba
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 Chissamba for hot-weather activities is from mid August to early October, with a peak score in the first week of September.
Beach/Pool Score in Chissamba
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 Chissamba 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 Chissamba
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
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.
Growing Degree Days in Chissamba
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 1.6 months, from August 19 to October 8, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest day of the year is September 16, with an average of 6.6 kWh.
The darker period of the year lasts for 1.6 months, from November 20 to January 8, with an average daily incident shortwave energy per square meter below 5.5 kWh. The darkest day of the year is December 10, with an average of 5.2 kWh.
Average Daily Incident Shortwave Solar Energy in Chissamba
For the purposes of this report, the geographical coordinates of Chissamba are -12.167 deg latitude, 17.333 deg longitude, and 4,606 ft elevation.
The topography within 2 miles of Chissamba contains only modest variations in elevation, with a maximum elevation change of 463 feet and an average elevation above sea level of 4,697 feet. Within 10 miles contains only modest variations in elevation (1,043 feet). Within 50 miles contains very significant variations in elevation (2,172 feet).
The area within 2 miles of Chissamba is covered by shrubs (63%) and trees (27%), within 10 miles by shrubs (51%) and trees (28%), and within 50 miles by trees (56%) and shrubs (29%).
This report illustrates the typical weather in Chissamba, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Chissamba is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.
The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Chissamba, according to the International Standard Atmosphere .
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.
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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
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.