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Jamestown vs Cayenne Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Cayenne, French Guiana is approximately 5,627 km or 3,497 mi.
  • To reach Jamestown in this distance one would set out from Cayenne bearing 115.2° or ESE and follow the great circles arc to approach Jamestown bearing 110.3° or ESE .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Cayenne has a tropical monsoonal climate (Am).
  • The average temperature is 4.9 °C (8.9°F) cooler.
  • Average monthly temperatures vary by 2.5 °C (4.5°F) more in Jamestown. The continentality subtype is truly hyperoceanic as opposed to extremely hyperoceanic.
  • Total annual precipitation averages 3607 mm (142 in) less which is equivalent to 3607 l/m² (88.52 US gal/ft²) or 36,070,000 l/ha (3,856,122 US gal/ac) less. About 0 as much.
  • The altitude of the sun at midday is overall 4° lower in Jamestown than in Cayenne.
  • Relative humidity levels are 6.9% lower.
  • The mean dew point temperature is 6.3°C (11.3°F) lower.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) -2 (-4) -2 (-4) -1 (-2) -3 (-5) -5 (-9) -8 (-14) -9 (-16) -10 (-18) -10 (-18) -9 (-16) -8 (-14) -6 (-11) -6 (-11)
average temperature iconAverage Temperature °C ( °F) -2 (-4) -2 (-4) -2 (-4) -3 (-5) -4 (-7) -6 (-11) -7 (-13) -8 (-14) -8 (-14) -8 (-14) -6 (-11) -5 (-8) -5 (-9)
minimum temperature iconAverage Min Temperature °C ( °F) -2 (-4) -2 (-4) -1 (-2) -3 (-5) -4 (-7) -5 (-9) -6 (-11) -6 (-11) -6 (-11) -5 (-9) -5 (-9) -4 (-7) -4 (-7)
rainfall iconAverage Precipitation mm (in) -423 (-17) -413 (-16) -412 (-16) -470 (-19) -572 (-23) -439 (-17) -241 (-9) -134 (-5) -27 (-1) -40 (-2) -122 (-5) -314 (-12) -3607 (-142)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -19 ( -61) -16 ( -57) -16 ( -52) -16 ( -53) -21 ( -68) -20 ( -67) -13 ( -42) -11 ( -35) -4 ( -13) -4 ( -13) -11 ( -37) -20 ( -65)   -171 ( -47)
daylight iconAverage Daylight Hours & Minutes/ Day +1h 04' +0h 40' +0h 07' -0h 28' -0h 57' -1h 12' -1h 05' -0h 40' -0h 06' +0h 29' +0h 58' +1h 12'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +20 +9.2 -11.5 -20.7 -20.7 -20.7 -20.8 -20.8 -12 +9.7 +19.8 +20.8   -4
relative humidity iconRelative Humidity (%) -17 -13 -16 -16 -11 -7 -1 +5 +6 +3 -2 -14   -6.9
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) -5.8 (-10) -4.9 (-9) -5.5 (-10) -6.5 (-12) -6.2 (-11) -7.2 (-13) -7 (-13) -6.2 (-11) -5.9 (-11) -6.5 (-12) -6.2 (-11) -7.5 (-14) -6.3 (-11)

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