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Jamestown vs Civitavecchia Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Civitavecchia, Italy is approximately 6,691 km or 4,158 mi.
  • To reach Jamestown in this distance one would set out from Civitavecchia bearing 199.5° or SSW and follow the great circles arc to approach Jamestown bearing 195° or SSW .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Civitavecchia has a Mediterranean hot climate (Csa).
  • The annual mean temperature is 5.5 °C (10°F) warmer.
  • Average monthly temperatures vary by 9.8 °C (17.6°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to truly oceanic.
  • Total annual precipitation averages 525.8 mm (20.7 in) less which is equivalent to 525.8 l/m² (12.9 US gal/ft²) or 5,258,000 l/ha (562,115 US gal/ac) less. About 1/5 as much.
  • The altitude of the sun at midday is overall 22.5° higher in Jamestown than in Civitavecchia.
  • Relative humidity levels are 3.2% lower.
  • The mean dew point temperature is 4.6°C (8.2°F) higher.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +14 (+26) +14 (+25) +13 (+24) +10 (+19) +4 (+7) +-1 (-1) -5 (-8) -5 (-9) -3 (-5) +2 (+3) +6 (+11) +10 (+18) +5 (+9)
average temperature iconAverage Temperature °C ( °F) +14 (+25) +14 (+25) +12 (+22) +10 (+19) +5 (+8) +0 (+1) -3 (-6) -4 (-7) -2 (-3) +2 (+3) +7 (+13) +11 (+20) +6 (+10)
minimum temperature iconAverage Min Temperature °C ( °F) +14 (+25) +14 (+24) +14 (+24) +10 (+19) +5 (+8) +1 (+1) -3 (-6) -4 (-6) -2 (-3) +3 (+5) +7 (+12) +11 (+20) +6 (+10)
rainfall iconAverage Precipitation mm (in) -86 (-3) -61 (-2) -30 (-1) -43 (-2) -24 (-1) -1 (0) +24 (+1) -16 (-1) -51 (-2) -81 (-3) -89 (-4) -68 (-3) -526 (-21)
daylight iconAverage Daylight Hours & Minutes/ Day +3h 31' +2h 10' +0h 23' -1h 30' -3h 07' -3h 56' -3h 34' -2h 11' -0h 20' +1h 33' +3h 09' +3h 56'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +57.1 +46.2 +25.4 +2.3 -14.3 -20.7 -14.8 +2 +24.8 +46.5 +56.7 +57.9   +22.5
relative humidity iconRelative Humidity (%) -9 -7 -8 -9 -2 -2 +2 +3 +3 -2 -1 -7   -3.3
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +11.4 (+21) +11.6 (+21) +10.1 (+18) +7.9 (+14) +4.1 (+7) +0 (+0) -2.9 (-5) -3 (-5) -1 (-2) +1.2 (+2) +6.5 (+12) +8.9 (+16) +4.6 (+8)

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Jamestown vs Civitavecchia Discussion

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