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Boise, Idaho vs Portland, Oregon Climate & Distance Between

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  • The distance between Boise, Idaho, Usa and Portland, Oregon, Usa is approximately 554 km or 344 mi.
  • To reach Boise, Idaho in this distance one would set out from Portland, Oregon bearing 111.8° or ESE and follow the great circles arc to approach Boise, Idaho bearing 116.3° or ESE .
  • Boise, Idaho has a mid-latitude cool steppe climate (BSk) whereas Portland, Oregon has a Mediterranean warm climate (Csb).
  • Boise, Idaho is in or near the cool temperate steppe biome whereas Portland, Oregon is in or near the warm temperate moist forest biome.
  • The mean temperature is 1.5 °C (2.7°F) cooler.
  • Average monthly temperatures vary by 8.9 °C (16°F) more in Boise, Idaho. The continentality subtype is subcontinental as opposed to truly oceanic.
  • Total annual precipitation averages 614.4 mm (24.2 in) less which is equivalent to 614.4 l/m² (15.08 US gal/ft²) or 6,144,000 l/ha (656,834 US gal/ac) less. About 1/3 as much.
  • There are 1128 more hours of sunlight per year in Boise, Idaho. In whichever way circa 3h 05' more per day or about 1 4/7 as many.
  • The altitude of the sun at midday is overall 2° higher in Boise, Idaho than in Portland, Oregon.
  • Relative humidity levels are 17.5% lower.
  • The mean dew point temperature is 5.9°C (10.7°F) lower.

Climate Comparison Table

The table shows values for Boise, Idaho relative to Portland, Oregon. You can also view this comparison the other way around from the perspective of Portland, Oregon vs Boise, Idaho.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature °C ( °F) -5 (-9) -4 (-7) -2 (-3) 0 (+1) +2 (+4) +4 (+7) +6 (+10) +4 (+8) 1 (+2) 0 (+1) -2 (-4) -4 (-8) 0 (+0)
average temperature iconAverage Temperature °C ( °F) -6 (-11) -4 (-8) -3 (-5) -1 (-2) +0 (+1) +2 (+3) +3 (+6) +2 (+4) 0 (-1) -2 (-3) -3 (-6) -6 (-10) -2 (-3)
minimum temperature iconAverage Min Temperature °C ( °F) -7 (-12) -5 (-9) -4 (-7) -3 (-5) -2 (-3) 0 (-1) +1 (+1) 0 (0) -2 (-4) -3 (-6) -5 (-8) -7 (-12) -3 (-5)
rainfall iconAverage Precipitation mm (in) -99 (-4) -71 (-3) -58 (-2) -29 (-1) -25 (-1) -17 (-1) -7 (0) -17 (-1) -24 (-1) -49 (-2) -98 (-4) -121 (-5) -614 (-24)
rain days iconNumber of Precipitation Days (% chance of precip. on a day ) -6 ( -19) -4 ( -14) -7 ( -23) -4 ( -13) -2 ( -6) -3 ( -10) -1 ( -3) -2 ( -6) -3 ( -10) -6 ( -19) -6 ( -20) -8 ( -26)   -52 ( -14)
sunshine iconAverage Sunlight Hours/ Day +1h 27' +2h 05' +3h 00' +2h 50' +3h 25' +5h 22' +3h 13' +3h 54' +3h 32' +3h 48' +2h 22' +2h 01'   +3h 05'
daylight iconAverage Daylight Hours & Minutes/ Day +0h 13' +0h 07' +0h 01' -0h 05' -0h 11' -0h 15' -0h 13' -0h 07' -0h 01' +0h 05' +0h 11' +0h 15'   0h 00'
sun altitude iconSun altitude at solar noon on the 21st day (°) +2 +2 +2.1 +2 +2 +2.1 +2.1 +2.1 +2 +2.1 +2.1 +2   +2
relative humidity iconRelative Humidity (%) -5 -8 -14 -16 -16 -20 -25 -28 -27 -28 -16 -7   -17.5
dewpoint temperature iconAverage Dew Point Temperature °C & (°F) -6.2 (-11) -5.3 (-10) -5.3 (-10) -5 (-9) -4.1 (-7) -4.1 (-7) -5.2 (-9) -7.1 (-13) -8.2 (-15) -8 (-14) -6.2 (-11) -6.3 (-11) -5.9 (-11)

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Boise, Idaho vs Portland, Oregon Discussion

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Climate Guides for Locations near Boise, Idaho

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