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Jamestown vs Johannesburg Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Johannesburg, South Africa is approximately 3,689 km or 2,293 mi.
  • To reach Jamestown in this distance one would set out from Johannesburg bearing 281.1° or W and follow the great circles arc to approach Jamestown bearing 293.7° or WNW .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Johannesburg has a mid-latitude cool steppe climate (BSk).
  • The average annual temperature is 5.6 °C (10.1°F) warmer.
  • Average monthly temperatures vary by 6 °C (10.8°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to barely hyperoceanic.
  • Total annual precipitation averages 406 mm (16 in) less which is equivalent to 406 l/m² (9.96 US gal/ft²) or 4,060,000 l/ha (434,041 US gal/ac) less. About 1/4 as much.
  • The altitude of the sun at midday is overall 7.5° higher in Jamestown than in Johannesburg.
  • Relative humidity levels are 10.4% higher.
  • The mean dew point temperature is 7.8°C (14.1°F) higher.

Climate Comparison Table

The table shows values for Jamestown relative to Johannesburg. You can also view this comparison the other way around from the perspective of Johannesburg vs Jamestown.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +1 (+2) +2 (+4) +4 (+7) +5 (+9) +5 (+9) +6 (+11) +5 (+9) +2 (+4) +-1 (-2) +-2 (-4) +-2 (-4) +-2 (-4) +2 (+3)
average temperature iconAverage Temperature °C ( °F) +4 (+6) +5 (+8) +6 (+10) +8 (+14) +10 (+17) +11 (+19) +10 (+17) +7 (+13) +4 (+7) +2 (+3) +2 (+4) +2 (+4) +6 (+10)
minimum temperature iconAverage Min Temperature °C ( °F) +6 (+11) +7 (+13) +9 (+16) +11 (+20) +13 (+23) +14 (+25) +13 (+23) +11 (+20) +8 (+14) +6 (+11) +5 (+9) +5 (+9) +9 (+16)
rainfall iconAverage Precipitation mm (in) -117 (-5) -84 (-3) -70 (-3) -44 (-2) +5 (+0) +9 (+0) +29 (+1) +4 (+0) -22 (-1) -5 (0) -11 (0) -100 (-4) -406 (-16)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -11 ( -35) -8 ( -28) -7 ( -23) -4 ( -13) 0 ( 0) +5 (+17) +6 (+19) +1 (+3) -2 ( -7) -8 ( -26) -13 ( -43) -14 ( -45)   -55 ( -15)
daylight iconAverage Daylight Hours & Minutes/ Day -0h 36' -0h 22' -0h 04' +0h 15' +0h 32' +0h 40' +0h 36' +0h 22' +0h 03' -0h 16' -0h 32' -0h 40'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +2 +9.6 +10.2 +10.2 +10.2 +10.3 +10.2 +10.2 +10.2 +9.4 +1.7 -4.7   +7.5
relative humidity iconRelative Humidity (%) -5 -6 -6 +1 +15 +19 +22 +29 +28 +17 +11 +0   +10.4
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +2.1 (+4) +2.9 (+5) +3.9 (+7) +7.8 (+14) +12.5 (+23) +14.5 (+26) +14.1 (+25) +13.6 (+24) +10.7 (+19) +5.5 (+10) +4.5 (+8) +1.9 (+3) +7.8 (+14)

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