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Jamestown vs Ulan-Bator/ Ulaanbaatar Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Ulan-Bator/ Ulaanbaatar, Mongolia is approximately 12,989 km or 8,071 mi.
  • To reach Jamestown in this distance one would set out from Ulan-Bator/ Ulaanbaatar bearing 275.8° or W and follow the great circles arc to approach Jamestown bearing 223.9° or SW .
  • Jamestown has a subtropical hot desert climate (BWh) whereas Ulan-Bator/ Ulaanbaatar has a mid-latitude cool steppe climate (BSk).
  • The average temperature is 24.2 °C (43.6°F) warmer.
  • Average monthly temperatures vary by 37.2 °C (67°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to truly continental.
  • Total annual precipitation averages 79.4 mm (3.1 in) less which is equivalent to 79.4 l/m² (1.95 US gal/ft²) or 794,000 l/ha (84,884 US gal/ac) less. About 5/8 as much.
  • The altitude of the sun at midday is overall 28.4° higher in Jamestown than in Ulan-Bator/ Ulaanbaatar.
  • Relative humidity levels are 15.3% higher.
  • The mean dew point temperature is 26.4°C (47.5°F) higher.

Climate Comparison Table

The table shows values for Jamestown relative to Ulan-Bator/ Ulaanbaatar. You can also view this comparison the other way around from the perspective of Ulan-Bator/ Ulaanbaatar vs Jamestown.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) +43 (+77) +38 (+69) +30 (+54) +19 (+34) +7 (+13) +1 (+3) +-1 (-1) +1 (+1) +6 (+12) +16 (+29) +27 (+49) +38 (+68) +19 (+34)
average temperature iconAverage Temperature °C ( °F) +49 (+87) +45 (+80) +34 (+61) +24 (+43) +13 (+24) +6 (+12) +3 (+6) +5 (+10) +13 (+23) +21 (+38) +34 (+62) +44 (+79) +24 (+44)
minimum temperature iconAverage Min Temperature °C ( °F) +48 (+86) +45 (+81) +37 (+67) +27 (+48) +16 (+29) +10 (+17) +6 (+10) +8 (+14) +15 (+27) +24 (+43) +34 (+62) +43 (+77) +26 (+47)
rainfall iconAverage Precipitation mm (in) +7 (+0) +8 (+0) +17 (+1) +2 (+0) +5 (+0) -24 (-1) -25 (-1) -42 (-2) -21 (-1) -4 (0) -3 (0) +1 (+0) -79 (-3)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) +3 (+10) +3 (+11) +3 (+10) +1 (+3) 0 ( 0) +1 (+3) -2 ( -6) -5 ( -16) -1 ( -3) -1 ( -3) -2 ( -7) 0 ( 0)   0 ( 0)
daylight iconAverage Daylight Hours & Minutes/ Day +4h 10' +2h 34' +0h 28' -1h 46' -3h 41' -4h 40' -4h 14' -2h 34' -0h 24' +1h 49' +3h 44' +4h 40'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +63 +52.2 +31.4 +8.3 -8.3 -14.8 -8.9 +7.8 +30.6 +52.2 +62.5 +63.8   +28.4
relative humidity iconRelative Humidity (%) -10 -1 +3 +23 +32 +28 +20 +27 +32 +24 +15 -10   +15.3
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +44.2 (+80) +41.8 (+75) +32.1 (+58) +26.9 (+48) +20.2 (+36) +13.3 (+24) +7.9 (+14) +11.5 (+21) +19.3 (+35) +24.5 (+44) +35 (+63) +39.9 (+72) +26.4 (+48)

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