Climate and Average Weather Year Round at Frankfort South Africa
At Frankfort, the summers are long, warm, and partly cloudy and the winters are short, cold, dry, and mostly clear. Over the course of the year, the temperature typically varies from 26°F to 81°F and is rarely below 20°F or above 89°F.
Based on the tourism score, the best times of year to visit Frankfort for warm-weather activities are from mid September to mid October and from early December to early April.
Climate at Frankfort
Average Temperature at Frankfort
The warm season lasts for 5.2 months, from October 5 to March 12, with an average daily high temperature above 78°F. The hottest day of the year is January 1, with an average high of 81°F and low of 56°F.
The cold season lasts for 2.4 months, from May 21 to August 1, with an average daily high temperature below 68°F. The coldest day of the year is July 5, with an average low of 26°F and high of 65°F.
Average High and Low Temperature at Frankfort
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 at Frankfort
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
At Frankfort, 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 at Frankfort begins around February 21 and lasts for 7.4 months, ending around October 3. On July 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 89% of the time, and overcast or mostly cloudy 11% of the time.
The cloudier part of the year begins around October 3 and lasts for 4.6 months, ending around February 21. On November 18, the cloudiest day of the year, the sky is overcast or mostly cloudy 36% of the time, and clear, mostly clear, or partly cloudy 64% of the time.
Cloud Cover Categories at Frankfort
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 at Frankfort varies significantly throughout the year.
The wetter season lasts 5.4 months, from October 10 to March 23, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 51% on December 13.
The drier season lasts 6.6 months, from March 23 to October 10. The smallest chance of a wet day is 1% on July 6.
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 51% on December 13.
Daily Chance of Precipitation at Frankfort
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. Frankfort experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.5 months, from August 28 to May 11, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 10, with an average total accumulation of 3.6 inches.
The rainless period of the year lasts for 3.5 months, from May 11 to August 28. The least rain falls around July 6, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall at Frankfort
The length of the day at Frankfort varies over the course of the year. In 2021, the shortest day is June 21, with 10 hours, 25 minutes of daylight; the longest day is December 21, with 13 hours, 52 minutes of daylight.
Hours of Daylight and Twilight at Frankfort
The earliest sunrise is at 5:03 AM on December 1, and the latest sunrise is 1 hour, 53 minutes later at 6:56 AM on July 2. The earliest sunset is at 5:18 PM on June 9, and the latest sunset is 1 hour, 47 minutes later at 7:05 PM on January 10.
Daylight saving time (DST) is not observed at Frankfort during 2021.
Sunrise & Sunset with Twilight at Frankfort
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 at Frankfort
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 perceived humidity level at Frankfort, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels at Frankfort
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 at Frankfort experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 4.2 months, from July 30 to December 3, with average wind speeds of more than 8.4 miles per hour. The windiest day of the year is September 24, with an average hourly wind speed of 9.9 miles per hour.
The calmer time of year lasts for 7.8 months, from December 3 to July 30. The calmest day of the year is March 31, with an average hourly wind speed of 6.9 miles per hour.
Average Wind Speed at Frankfort
The predominant average hourly wind direction at Frankfort varies throughout the year.
The wind is most often from the east for 2.7 months, from January 8 to March 30, with a peak percentage of 43% on February 20. The wind is most often from the west for 8.9 months, from March 30 to December 26, with a peak percentage of 43% on June 8. The wind is most often from the north for 1.9 weeks, from December 26 to January 8, with a peak percentage of 32% on January 1.
Wind Direction at Frankfort
Best Time of Year to Visit
To characterize how pleasant the weather is at Frankfort 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 times of year to visit Frankfort for general outdoor tourist activities are from mid September to mid October and from early December to early April, with a peak score in the last week of February.
Tourism Score at Frankfort
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 Frankfort for hot-weather activities is from mid December to early March, with a peak score in the first week of January.
Beach/Pool Score at Frankfort
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).
The growing season at Frankfort typically lasts for 7.9 months (240 days), from around September 7 to around May 4, rarely starting before August 18 or after September 30, and rarely ending before April 14 or after May 24.
Time Spent in Various Temperature Bands and the Growing Season at Frankfort
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.
Based on growing degree days alone, the first spring blooms at Frankfort should appear around July 25, only rarely appearing before July 20 or after July 30.
Growing Degree Days at Frankfort
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 significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.9 months, from October 25 to February 23, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest day of the year is December 30, with an average of 7.8 kWh.
The darker period of the year lasts for 2.9 months, from May 7 to August 3, with an average daily incident shortwave energy per square meter below 4.8 kWh. The darkest day of the year is June 21, with an average of 4.1 kWh.
Average Daily Incident Shortwave Solar Energy at Frankfort
This report illustrates the typical weather at Frankfort, 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
Frankfort has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
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 © 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.