Average Weather in Bethlehem South Africa
In Bethlehem, the summers are long and warm; the winters are short, cold, and dry; and it is mostly clear year round. Over the course of the year, the temperature typically varies from 30°F to 79°F and is rarely below 24°F or above 86°F.
Based on the tourism score, the best time of year to visit Bethlehem for warm-weather activities is from early December to early April.
The warm season lasts for 4.1 months, from November 10 to March 14, with an average daily high temperature above 75°F. The hottest day of the year is January 2, with an average high of 79°F and low of 56°F.
The cold season lasts for 2.4 months, from May 27 to August 6, with an average daily high temperature below 64°F. The coldest day of the year is July 5, with an average low of 30°F and high of 60°F.
Average High and Low Temperature
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
Mutquín, Argentina (5,571 miles away); Achiras, Argentina (5,361 miles); and Oakdale, Australia (6,717 miles) are the far-away foreign places with temperatures most similar to Bethlehem (view comparison).
In Bethlehem, 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 Bethlehem begins around February 14 and lasts for 7.5 months, ending around September 28. On July 25, 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 September 28 and lasts for 4.5 months, ending around February 14. On November 14, 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
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 Bethlehem varies significantly throughout the year.
The wetter season lasts 5.6 months, from October 11 to March 30, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 45% on January 22.
The drier season lasts 6.4 months, from March 30 to October 11. The smallest chance of a wet day is 2% on July 16.
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 45% on January 22.
Daily Chance of Precipitation
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. Bethlehem experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.0 months, from August 11 to May 9, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 24, with an average total accumulation of 3.1 inches.
The rainless period of the year lasts for 3.0 months, from May 9 to August 11. The least rain falls around July 5, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
The length of the day in Bethlehem varies over the course of the year. In 2021, the shortest day is June 21, with 10 hours, 21 minutes of daylight; the longest day is December 21, with 13 hours, 56 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:01 AM on December 2, and the latest sunrise is 1 hour, 57 minutes later at 6:59 AM on July 2. The earliest sunset is at 5:17 PM on June 9, and the latest sunset is 1 hour, 51 minutes later at 7:08 PM on January 10.
Daylight saving time (DST) is not observed in Bethlehem during 2021.
Sunrise & Sunset with Twilight
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
The perceived humidity level in Bethlehem, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Bethlehem experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.4 months, from August 3 to December 16, with average wind speeds of more than 8.2 miles per hour. The windiest day of the year is September 24, with an average hourly wind speed of 9.7 miles per hour.
The calmer time of year lasts for 7.6 months, from December 16 to August 3. The calmest day of the year is March 31, with an average hourly wind speed of 6.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Bethlehem varies throughout the year.
The wind is most often from the east for 2.7 months, from January 7 to March 30, with a peak percentage of 45% on February 19. The wind is most often from the west for 9.3 months, from March 30 to January 7, with a peak percentage of 37% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Bethlehem 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 Bethlehem for general outdoor tourist activities is from early December to early April, with a peak score in the last week of February.
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 Bethlehem for hot-weather activities is from mid December to early March, with a peak score in the third week of January.
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.
The growing season in Bethlehem typically lasts for 8.4 months (253 days), from around September 4 to around May 15, rarely starting before August 13 or after September 30, and rarely ending before April 21 or after June 6.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Bethlehem should appear around August 1, only rarely appearing before July 26 or after August 7.
Growing Degree Days
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 3.6 months, from October 29 to February 18, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is December 30, with an average of 8.0 kWh.
The darker period of the year lasts for 3.0 months, from May 4 to August 5, 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 4.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Bethlehem are -28.231 deg latitude, 28.307 deg longitude, and 5,348 ft elevation.
The topography within 2 miles of Bethlehem contains only modest variations in elevation, with a maximum elevation change of 440 feet and an average elevation above sea level of 5,462 feet. Within 10 miles contains only modest variations in elevation (1,375 feet). Within 50 miles contains very significant variations in elevation (6,545 feet).
The area within 2 miles of Bethlehem is covered by artificial surfaces (52%) and cropland (46%), within 10 miles by cropland (75%) and grassland (21%), and within 50 miles by grassland (50%) and cropland (44%).
This report illustrates the typical weather in Bethlehem, 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 Bethlehem.
For each station, the records are corrected for the elevation difference between that station and Bethlehem 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 Bethlehem is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Bethlehem and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .