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Jamestown vs Antsiranana Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Antsiranana, Madagascar is approximately 5,930 km or 3,685 mi.
  • To reach Jamestown in this distance one would set out from Antsiranana bearing 259.2° or W and follow the great circles arc to approach Jamestown bearing 273.7° or W .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Antsiranana has a tropical wet and dry/ savanna climate with dry winters (Aw).
  • The average annual temperature is 3.4 °C (6.2°F) cooler.
  • Average monthly temperatures vary by 0.9 °C (1.6°F) more in Jamestown. The continentality subtype is truly hyperoceanic for both.
  • Total annual precipitation averages 1059.8 mm (41.7 in) less which is equivalent to 1059.8 l/m² (26.01 US gal/ft²) or 10,598,000 l/ha (1,132,997 US gal/ac) less. About 1/9 as much.
  • The altitude of the sun at midday is overall 1.6° lower in Jamestown than in Antsiranana.
  • Relative humidity levels are 10.1% higher.
  • The mean dew point temperature is 0.7°C (1.3°F) lower.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) -3 (-6) -3 (-6) -3 (-5) -4 (-7) -6 (-12) -6 (-11) -7 (-12) -7 (-12) -8 (-14) -8 (-14) -9 (-15) -7 (-13) -6 (-11)
average temperature iconAverage Temperature °C ( °F) -2 (-4) -2 (-4) -2 (-4) -2 (-4) -3 (-6) -3 (-6) -4 (-6) -3 (-6) -4 (-7) -5 (-9) -5 (-10) -5 (-8) -3 (-6)
minimum temperature iconAverage Min Temperature °C ( °F) -2 (-3) -2 (-3) -1 (-2) -2 (-3) -3 (-5) -2 (-4) -3 (-5) -2 (-4) -3 (-5) -3 (-6) -5 (-8) -4 (-7) -3 (-5)
rainfall iconAverage Precipitation mm (in) -330 (-13) -296 (-12) -159 (-6) -42 (-2) +5 (+0) -1 (0) +14 (+1) -9 (0) -4 (0) -15 (-1) -55 (-2) -168 (-7) -1060 (-42)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -16 ( -52) -14 ( -50) -9 ( -29) -4 ( -13) 0 ( 0) +2 (+7) +2 (+6) -2 ( -6) -2 ( -7) -4 ( -13) -7 ( -23) -12 ( -39)   -66 ( -18)
daylight iconAverage Daylight Hours & Minutes/ Day +0h 11' +0h 07' +0h 01' -0h 05' -0h 10' -0h 13' -0h 11' -0h 07' -0h 01' +0h 05' +0h 10' +0h 13'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +3.2 -2.6 -3.6 -3.6 -3.6 -3.5 -3.6 -3.6 -3.5 -2.3 +3 +3.6   -1.6
relative humidity iconRelative Humidity (%) -7 -8 -6 +2 +15 +17 +21 +23 +24 +22 +17 +1   +10.1
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) -3.6 (-6) -3.8 (-7) -3.5 (-6) -1.7 (-3) +0.4 (+1) +1.3 (+2) +1.8 (+3) +2.3 (+4) +2.1 (+4) +0.8 (+1) -0.7 (-1) -4 (-7) -0.7 (-1)

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