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Jamestown vs Port Moresby Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Port Moresby, Papua New Guinea is approximately 15,913 km or 9,889 mi.
  • To reach Jamestown in this distance one would set out from Port Moresby bearing 226.8° or SW and follow the great circles arc to approach Jamestown bearing 311.6° or NW .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Port Moresby has a tropical wet and dry/ savanna climate with dry winters (Aw).
  • The average annual temperature is 5.2 °C (9.3°F) cooler.
  • Average monthly temperatures vary by 2 °C (3.6°F) more in Jamestown. The continentality subtype is truly hyperoceanic as opposed to extremely hyperoceanic.
  • Total annual precipitation averages 1013 mm (39.9 in) less which is equivalent to 1013 l/m² (24.86 US gal/ft²) or 10,130,000 l/ha (1,082,964 US gal/ac) less. About 1/8 as much.
  • The altitude of the sun at midday is overall 2.5° lower in Jamestown than in Port Moresby.
  • Relative humidity levels are 7.3% lower.
  • The mean dew point temperature is 6.6°C (11.9°F) lower.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
average temperature iconAverage Temperature °C ( °F) -4 (-7) -3 (-5) -3 (-5) -3 (-5) -5 (-9) -5 (-9) -6 (-11) -6 (-11) -7 (-13) -7 (-13) -7 (-13) -6 (-11) -5 (-9)
rainfall iconAverage Precipitation mm (in) -142 (-6) -184 (-7) -150 (-6) -163 (-6) -31 (-1) -13 (-1) +21 (+1) -27 (-1) -48 (-2) -18 (-1) -97 (-4) -161 (-6) -1013 (-40)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -4 ( -13) -3 ( -11) -4 ( -13) -2 ( -7) +2 (+6) +3 (+10) +6 (+19) +1 (+3) 0 ( 0) -1 ( -3) -3 ( -10) -5 ( -16)   -10 ( -3)
daylight iconAverage Daylight Hours & Minutes/ Day +0h 20' +0h 13' +0h 02' -0h 09' -0h 18' -0h 23' -0h 21' -0h 13' -0h 02' +0h 09' +0h 18' +0h 23'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +6 -2.8 -6.5 -6.6 -6.5 -6.4 -6.4 -6.4 -6.3 -2.4 +5.7 +6.5   -2.5
relative humidity iconRelative Humidity (%) -13 -13 -14 -16 -14 -6 -2 +2 +2 -4 -1 -9   -7.3
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) -6.9 (-12) -5.8 (-10) -6 (-11) -6.5 (-12) -7.8 (-14) -6.1 (-11) -6.2 (-11) -5.4 (-10) -6.3 (-11) -7.6 (-14) -6.9 (-12) -7.8 (-14) -6.6 (-12)

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Jamestown vs Port Moresby Discussion

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