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Jamestown vs Mariehamn, Åland Islands Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Mariehamn, Åland Islands, Finland is approximately 8,762 km or 5,445 mi.
  • To reach Jamestown in this distance one would set out from Mariehamn, Åland Islands bearing 205.1° or SSW and follow the great circles arc to approach Jamestown bearing 192.7° or SSW .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Mariehamn, Åland Islands has a warm summer continental/ hemiboreal climate with no dry season (Dfb).
  • The mean annual temperature is 16.4 °C (29.6°F) warmer.
  • Average monthly temperatures vary by 17.5 °C (31.5°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to subcontinental.
  • Total annual precipitation averages 421 mm (16.6 in) less which is equivalent to 421 l/m² (10.33 US gal/ft²) or 4,210,000 l/ha (450,077 US gal/ac) less. About 1/4 as much.
  • The altitude of the sun at midday is overall 40.6° higher in Jamestown than in Mariehamn, Åland Islands.
  • Relative humidity levels are 6.1% lower.
  • The mean dew point temperature is 14.5°C (26.2°F) higher.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +28 (+50) +29 (+52) +27 (+49) +21 (+38) +12 (+22) +6 (+11) +1 (+2) +2 (+4) +7 (+13) +14 (+25) +18 (+32) +22 (+40) +16 (+28)
average temperature iconAverage Temperature °C ( °F) +28 (+50) +29 (+52) +27 (+48) +22 (+39) +15 (+26) +9 (+15) +4 (+6) +4 (+7) +9 (+15) +14 (+24) +18 (+32) +22 (+40) +16 (+30)
minimum temperature iconAverage Min Temperature °C ( °F) +27 (+49) +29 (+52) +28 (+50) +22 (+40) +16 (+29) +10 (+18) +5 (+9) +5 (+9) +9 (+16) +14 (+25) +17 (+31) +21 (+38) +17 (+30)
rainfall iconAverage Precipitation mm (in) -40 (-2) -21 (-1) -6 (0) -23 (-1) -14 (-1) -19 (-1) -12 (0) -56 (-2) -59 (-2) -55 (-2) -62 (-2) -54 (-2) -421 (-17)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -16 ( -52) -12 ( -42) -8 ( -26) -9 ( -30) -6 ( -19) -5 ( -17) -4 ( -13) -10 ( -32) -14 ( -47) -17 ( -55) -19 ( -63) -19 ( -61)   -139 ( -38)
daylight iconAverage Daylight Hours & Minutes/ Day +6h 24' +3h 48' +0h 41' -2h 36' -5h 35' -7h 18' -6h 30' -3h 49' -0h 35' +2h 41' +5h 39' +7h 18'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +75.1 +64.2 +43.5 +20.4 +3.8 -2.6 +3.3 +20 +42.9 +64.5 +74.7 +75.9   +40.6
relative humidity iconRelative Humidity (%) -24 -17 -12 -6 +9 +7 +7 +6 +1 -7 -14 -23   -6.1
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +21.6 (+39) +24.3 (+44) +22.5 (+41) +19 (+34) +15.8 (+28) +9.7 (+17) +4.8 (+9) +5.1 (+9) +8.4 (+15) +11.7 (+21) +14.9 (+27) +16.6 (+30) +14.5 (+26)

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Jamestown vs Mariehamn, Åland Islands Discussion

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