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Jamestown vs Semnan Climate & Distance Between

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  • The distance between Jamestown, Saint Helena and Semnan, Iran is approximately 8,453 km or 5,252 mi.
  • To reach Jamestown in this distance one would set out from Semnan bearing 238.3° or WSW and follow the great circles arc to approach Jamestown bearing 226° or SW .
  • Both have a subtropical hot desert climate (BWh).
  • The mean temperature is 3.4 °C (6.2°F) warmer.
  • Average monthly temperatures vary by 24.6 °C (44.3°F) less in Jamestown. The continentality subtype is truly hyperoceanic as opposed to truly continental.
  • Total annual precipitation averages 2.5 mm (0.1 in) less which is equivalent to 2.5 l/m² (0.06 US gal/ft²) or 25,000 l/ha (2,673 US gal/ac) less. About 1 as much.
  • The altitude of the sun at midday is overall 16.1° higher in Jamestown than in Semnan.
  • Relative humidity levels are 27.8% higher.
  • The mean dew point temperature is 11.6°C (20.8°F) higher.

Climate Comparison Table

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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
average temperature iconAverage Temperature °C ( °F) +20 (+37) +18 (+33) +13 (+23) +6 (+10) -2 (-4) -9 (-16) -12 (-22) -11 (-20) -7 (-12) +1 (+1) +9 (+16) +16 (+29) +3 (+6)
rainfall iconAverage Precipitation mm (in) -14 (-1) -11 (0) -3 (0) -4 (0) +3 (+0) +15 (+1) +31 (+1) +7 (+0) +4 (+0) -6 (0) -9 (0) -17 (-1) -2 (0)
daylight iconAverage Daylight Hours & Minutes/ Day +2h 56' +1h 50' +0h 20' -1h 16' -2h 36' -3h 17' -2h 59' -1h 50' -0h 17' +1h 18' +2h 38' +3h 17'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +50.7 +39.8 +19.1 -4.1 -20.7 -27.1 -21.2 -4.5 +18.3 +40 +50.3 +51.5   +16.1
relative humidity iconRelative Humidity (%) +0 +9 +16 +27 +37 +44 +46 +47 +45 +33 +24 +5   +27.8
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) +19 (+34) +18.9 (+34) +15.9 (+29) +13.2 (+24) +9.1 (+16) +6.5 (+12) +3.8 (+7) +4.8 (+9) +7.6 (+14) +9.6 (+17) +14.2 (+26) +16.2 (+29) +11.6 (+21)

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Jamestown vs Semnan Discussion

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Climate Guides for Locations near Jamestown

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