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Jamestown vs Portalegre Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Portalegre, Portugal is approximately 6,141 km or 3,816 mi.
  • To reach Jamestown in this distance one would set out from Portalegre bearing 178° or S and follow the great circles arc to approach Jamestown bearing 178.4° or S .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Portalegre has a Mediterranean hot climate (Csa).
  • The mean annual temperature is 6.7 °C (12.1°F) warmer.
  • Average monthly temperatures vary by 10.8 °C (19.4°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to truly oceanic.
  • Total annual precipitation averages 751 mm (29.6 in) less which is equivalent to 751 l/m² (18.43 US gal/ft²) or 7,510,000 l/ha (802,869 US gal/ac) less. About 1/6 as much.
  • The altitude of the sun at midday is overall 19.8° higher in Jamestown than in Portalegre.
  • Relative humidity levels are 4.4% higher.
  • The mean dew point temperature is 7.6°C (13.7°F) higher.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +16 (+28) +15 (+26) +13 (+24) +11 (+19) +4 (+6) +-2 (-4) -8 (-14) -8 (-14) -5 (-8) +3 (+5) +8 (+15) +12 (+22) +5 (+9)
average temperature iconAverage Temperature °C ( °F) +15 (+28) +15 (+27) +13 (+24) +12 (+21) +6 (+12) +1 (+2) -3 (-6) -3 (-6) -1 (-3) +4 (+6) +9 (+17) +13 (+23) +7 (+12)
minimum temperature iconAverage Min Temperature °C ( °F) +15 (+28) +15 (+27) +15 (+27) +13 (+23) +8 (+15) +4 (+7) +0 (+1) 0 (0) +1 (+1) +5 (+10) +9 (+17) +13 (+23) +8 (+15)
rainfall iconAverage Precipitation mm (in) -117 (-5) -109 (-4) -66 (-3) -71 (-3) -34 (-1) -22 (-1) +26 (+1) +2 (+0) -39 (-2) -90 (-4) -117 (-5) -114 (-4) -751 (-30)
daylight iconAverage Daylight Hours & Minutes/ Day +3h 15' +2h 01' +0h 22' -1h 23' -2h 53' -3h 38' -3h 18' -2h 01' -0h 19' +1h 26' +2h 55' +3h 38'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +54.4 +43.4 +22.7 -0.5 -17 -23.5 -17.5 -0.7 +22.1 +43.8 +54 +55.2   +19.8
relative humidity iconRelative Humidity (%) -14 -11 -5 -4 +8 +13 +24 +28 +21 +6 -2 -11   +4.4
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +11.7 (+21) +11.9 (+21) +11.5 (+21) +10.2 (+18) +7.9 (+14) +4.2 (+8) +3 (+5) +3.8 (+7) +3.7 (+7) +4.7 (+8) +8.6 (+15) +10 (+18) +7.6 (+14)

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Jamestown vs Portalegre Discussion

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