Vs > Porto-Nacional
 | Jamestown vs Porto-Nacional Climate & Distance Between |  |
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- The distance between Jamestown, Saint Helena and Porto-Nacional, Brazil is approximately 4,666 km or 2,900 mi.
- To reach Jamestown in this distance one would set out from Porto-Nacional bearing 101.9° or ESE
and follow the great circles arc to approach Jamestown bearing 91.6° or E .
- Jamestown has a subtropical hot desert climate (BWh) whereas Porto-Nacional has a tropical wet and dry/ savanna climate with dry winters (Aw).
- The annual average temperature is 4.3 °C (7.7°F) cooler.
- Average monthly temperatures vary by 1.4 °C (2.5°F) more in Jamestown. The continentality subtype is truly hyperoceanic as opposed to extremely hyperoceanic.
- Total annual precipitation averages 1530.9 mm (60.3 in) less which is equivalent to 1530.9 l/m² (37.57 US gal/ft²) or 15,309,000 l/ha (1,636,634 US gal/ac) less. About 0 as much.
- The altitude of the sun at midday is overall 2.1° lower in Jamestown than in Porto-Nacional.
- Relative humidity levels are 2.2% lower.
- The mean dew point temperature is 4.5°C (8°F) lower.
Climate Comparison Table
The table shows values for Jamestown relative to Porto-Nacional. You can also view this comparison the other way around from the perspective of Porto-Nacional vs Jamestown.
| |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
|
Annual |
 | Average Max Temperature °C ( °F) |
-4 (-8) |
-6 (-10) |
-3 (-6) |
-5 (-9) |
-9 (-16) |
-10 (-19) |
-12 (-21) |
-12 (-22) |
-14 (-24) |
-10 (-18) |
-9 (-16) |
-7 (-13) |
|
-8 (-15) |
 | Average Temperature °C ( °F) |
-2 (-3) |
-2 (-3) |
-2 (-3) |
-2 (-4) |
-4 (-8) |
-5 (-8) |
-5 (-10) |
-7 (-13) |
-8 (-14) |
-7 (-12) |
-5 (-9) |
-4 (-7) |
|
-4 (-8) |
 | Average Min Temperature °C ( °F) |
-1 (-1) |
-2 (-3) |
-2 (-4) |
-1 (-2) |
-2 (-3) |
-1 (-2) |
-1 (-2) |
-2 (-4) |
-5 (-8) |
-4 (-8) |
-4 (-7) |
-3 (-5) |
|
-2 (-4) |
 | Average Precipitation mm (in) |
-232 (-9) |
-257 (-10) |
-252 (-10) |
-138 (-5) |
-20 (-1) |
+11 (+0) |
+28 (+1) |
+3 (+0) |
-47 (-2) |
-181 (-7) |
-219 (-9) |
-227 (-9) |
|
-1531 (-60) |
 | Number of Precipitation Days (% chance of precip. on a day ) |
-16 ( -52) |
-16 ( -57) |
-15 ( -48) |
-10 ( -33) |
0 ( 0) |
+6 (+20) |
+8 (+26) |
+2 (+6) |
-3 ( -10) |
-11 ( -35) |
-17 ( -57) |
-18 ( -58) |
|
-90 ( -25) |
 | Average Daylight Hours & Minutes/ Day |
+0h 16' |
+0h 10' |
+0h 01' |
-0h 07' |
-0h 14' |
-0h 18' |
-0h 17' |
-0h 10' |
-0h 01' |
+0h 07' |
+0h 15' |
+0h 18' |
|
0h 00' |
 | Sun altitude at solar noon on the 21st day (°) |
+4.7 |
-3 |
-5.1 |
-5.1 |
-5.1 |
-5.2 |
-5.3 |
-5.3 |
-5.2 |
-2.6 |
+4.6 |
+5.2 |
| -2.1 |
 | Relative Humidity (%) |
-20 |
-19 |
-20 |
-15 |
+0 |
+8 |
+18 |
+26 |
+19 |
-2 |
-7 |
-15 |
|
-2.3 |
 | Average Dew Point Temperature °C & (°F) |
-5.9 (-11) |
-5.6 (-10) |
-5.9 (-11) |
-5.3 (-10) |
-4.1 (-7) |
-2.4 (-4) |
-0.8 (-1) |
-0.1 (0) |
-3 (-5) |
-7 (-13) |
-6.5 (-12) |
-7 (-13) |
|
-4.5 (-8) |
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Jamestown vs Porto-Nacional Discussion
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