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Jamestown vs Uummannaq Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Uummannaq, Greenland is approximately 10,258 km or 6,374 mi.
  • To reach Jamestown in this distance one would set out from Uummannaq bearing 135.8° or SE and follow the great circles arc to approach Jamestown bearing 166.1° or SSE .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Uummannaq has a tundra climate (ET).
  • The average annual temperature is 25.7 °C (46.3°F) warmer.
  • Average monthly temperatures vary by 19 °C (34.2°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to subcontinental.
  • Total annual precipitation averages 64 mm (2.5 in) less which is equivalent to 64 l/m² (1.57 US gal/ft²) or 640,000 l/ha (68,420 US gal/ac) less. About 2/3 as much.
  • The altitude of the sun at midday is overall 51.1° higher in Jamestown than in Uummannaq.
  • Relative humidity levels are 5.7% lower.
  • The mean dew point temperature is 23.4°C (42°F) higher.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +37 (+67) +39 (+70) +39 (+70) +34 (+61) +21 (+38) +15 (+27) +11 (+20) +12 (+22) +17 (+31) +23 (+41) +27 (+49) +31 (+56) +26 (+46)
average temperature iconAverage Temperature °C ( °F) +37 (+67) +39 (+70) +39 (+69) +35 (+62) +23 (+41) +16 (+29) +12 (+22) +13 (+23) +17 (+31) +22 (+40) +27 (+48) +31 (+56) +26 (+46)
minimum temperature iconAverage Min Temperature °C ( °F) +37 (+67) +39 (+70) +40 (+72) +35 (+63) +23 (+41) +16 (+29) +12 (+22) +12 (+22) +16 (+29) +22 (+40) +25 (+45) +30 (+54) +26 (+46)
rainfall iconAverage Precipitation mm (in) -16 (-1) -6 (0) +7 (+0) -3 (0) +7 (+0) +7 (+0) +22 (+1) -2 (0) -16 (-1) -17 (-1) -25 (-1) -22 (-1) -64 (-3)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -4 ( -13) -2 ( -7) -1 ( -3) -3 ( -10) -1 ( -3) +3 (+10) +4 (+13) -1 ( -3) -5 ( -17) -5 ( -16) -8 ( -27) -7 ( -23)   -30 ( -8)
daylight iconAverage Daylight Hours & Minutes/ Day +12h 22' +6h 23' +1h 04' -4h 11' -10h 45' -12h 55' -12h 32' -6h 26' -0h 55' +4h 20' +10h 56' +12h 55'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +85.1 +74.6 +54 +30.9 +14.3 +7.9 +13.9 +30.6 +53.5 +75 +84.9 +86.5   +51.1
relative humidity iconRelative Humidity (%) -13 -7 -10 -14 -5 +2 +4 +6 +0 -9 -10 -13   -5.8
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +32.5 (+59) +35.5 (+64) +34.5 (+62) +30.1 (+54) +20.3 (+37) +15.8 (+28) +12.3 (+22) +13.2 (+24) +16.3 (+29) +19.3 (+35) +23.6 (+42) +26.9 (+48) +23.4 (+42)

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