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Jamestown vs Bilma Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Bilma, Niger is approximately 4,354 km or 2,706 mi.
  • To reach Jamestown in this distance one would set out from Bilma bearing 209.1° or SSW and follow the great circles arc to approach Jamestown bearing 208.6° or SSW .
  • Both have a subtropical hot desert climate (BWh).
  • The annual mean temperature is 5 °C (8.9°F) cooler.
  • Average monthly temperatures vary by 12.3 °C (22.1°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to truly oceanic.
  • Total annual precipitation averages 124.7 mm (4.9 in) more which is equivalent to 124.7 l/m (3.06 US gal/ft) or 1,247,000 l/ha (133,313 US gal/ac) more. About 11 1/7 as much.
  • The altitude of the sun at midday is overall 0.6° higher in Jamestown than in Bilma.
  • Relative humidity levels are 54.3% higher.
  • The mean dew point temperature is 17.7°C (31.8°F) higher.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +1 (+3) +-2 (-4) -5 (-10) -12 (-21) -18 (-32) -19 (-35) -19 (-35) -19 (-33) -18 (-32) -14 (-24) -8 (-14) +-3 (-5) -11 (-20)
average temperature iconAverage Temperature °C ( °F) +7 (+13) +4 (+7) 0 (-1) -5 (-9) -10 (-19) -12 (-22) -13 (-24) -13 (-23) -11 (-20) -8 (-14) -1 (-2) +4 (+7) -5 (-9)
minimum temperature iconAverage Min Temperature °C ( °F) +13 (+23) +10 (+19) +7 (+12) +1 (+2) -4 (-7) -6 (-11) -8 (-15) -9 (-15) -6 (-10) -1 (-1) +5 (+10) +10 (+17) +1 (+2)
rainfall iconAverage Precipitation mm (in) +8 (+0) +10 (+0) +20 (+1) +10 (+0) +18 (+1) +16 (+1) +31 (+1) +3 (+0) +4 (+0) +2 (+0) +0 (+0) +3 (+0) +125 (+5)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) +3.5 (+11) +4 (+14) +4.5 (+15) +2.5 (+8) +3.5 (+11) +5.5 (+18) +7 (+23) +1 (+3) +1 (+3) +0.5 (+2) -0.5 ( -2) +0.5 (+2)   +33 (+9)
daylight iconAverage Daylight Hours & Minutes/ Day +1h 49' +1h 08' +0h 12' -0h 47' -1h 37' -2h 01' -1h 50' -1h 08' -0h 10' +0h 48' +1h 38' +2h 02'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day () +33.8 +23 +2.2 -21 -34.4 -34.5 -34.1 -21.3 +1.5 +23.3 +33.5 +34.6   +0.6
relative humidity iconRelative Humidity (%) +46 +51 +52 +55 +61 +59 +56 +52 +59 +58 +57 +46   +54.3
dewpoint temperature iconAverage Dew Point Temperature C & (F) +23.8 (+43) +24.4 (+44) +22.9 (+41) +21.9 (+39) +18.4 (+33) +14.6 (+26) +9.4 (+17) +5.8 (+10) +12.9 (+23) +16.8 (+30) +21 (+38) +20.3 (+37) +17.7 (+32)

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