Sand Island, Johnston Atoll, United States Minor Outlying Islands Climate

Weather: 26.88°C/80.38°F, Wind SW at 8.03 km/h, 80% Humidity, 0.18% Chance of rain

United States Minor Outlying Islands
(Photo by Ryan Schram on Unsplash)

Sand Island Climate Summary

Located at an elevation of -14.34 meters (-47.05 feet) above sea level, Sand Island has a Tropical rainforest climate climate (Classification: Af). The district’s yearly temperature is 26.66ºC (79.99ºF) and it is 0.33% higher than United States Minor Outlying Islands’s averages. Sand Island typically receives about 73.64 millimeters (2.9 inches) of precipitation and has 147.75 rainy days (40.48% of the time) annually.

CountryUnited States Minor Outlying Islands
CityJohnston Atoll
Longitude-169.5336477
Latitude16.7295035
Attitude/Elevation-14.34m (-47.05ft)
Local timeThursday 06:53
Annual high temperature26.93ºC (80.47ºF)
Annual low temperature26.07ºC (78.93ºF)
Average annual precip.73.64mm (2.9in)
Warmest monthSeptember (28.24ºC / 82.83ºF)
Coldest MonthFebruary (24.59ºC / 76.26ºF)
Wettest MonthDecember (130.8mm / 5.15in)
Driest MonthJanuary (30.34mm / 1.19in)
Number of days with rainfall (≥ 1.0 mm)147.75 days (40.48%)
Days with no rain217.25 days (59.52%)
Humidity78.63%

Climate Sand Island: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)27.49(81.48)26.48(79.66)27.49(81.48)27.49(81.48)27.49(81.48)29.53(85.15)29.53(85.15)29.53(85.15)30.55(86.99)29.53(85.15)29.53(85.15)28.51(83.32)30.55(86.99)
Average high °C (°F)25.97(78.75)25.49(77.88)25.56(78.01)26.01(78.82)26.59(79.86)27.22(81.0)27.64(81.75)28.13(82.63)28.24(82.83)28.04(82.47)27.59(81.66)26.72(80.1)26.93(80.47)
Daily mean °C (°F)25.64(78.15)25.19(77.34)25.26(77.47)25.74(78.33)26.31(79.36)27.05(80.69)27.37(81.27)27.79(82.02)27.97(82.35)27.78(82.0)27.32(81.18)26.49(79.68)26.66(79.99)
Average low °C (°F)25.02(77.04)24.59(76.26)24.61(76.3)25.16(77.29)25.83(78.49)26.56(79.81)26.86(80.35)27.21(80.98)27.4(81.32)27.12(80.82)26.64(79.95)25.84(78.51)26.07(78.93)
Record low °C (°F)17.31(63.16)16.29(61.32)17.31(63.16)17.31(63.16)18.33(64.99)18.33(64.99)20.37(68.67)19.35(66.83)19.35(66.83)19.35(66.83)19.35(66.83)18.33(64.99)16.29(61.32)
Average precipitation mm (inches)30.34(1.19)61.63(2.43)52.61(2.07)52.88(2.08)58.23(2.29)30.46(1.2)57.66(2.27)99.32(3.91)100.2(3.94)101.57(4.0)108.03(4.25)130.8(5.15)73.64(2.9)
Average precipitation days (≥ 1.0 mm)7.3110.6412.3110.8311.210.5511.1113.9815.9315.8316.211.8512.31
Average relative humidity (%)76.8376.9278.7679.4179.479.1779.3579.3578.8978.7678.7278.0578.63
Mean monthly sunshine hours10.1210.6510.511.4912.6512.9912.6711.5411.059.157.967.8910.72

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Sand Island in recent years.

Sand Island

Sand Island Temperature by Month

September
27.97°C | 82.35°F
August
27.79°C | 82.02°F
October
27.78°C | 82.0°F
July
27.37°C | 81.27°F
November
27.32°C | 81.18°F
June
27.05°C | 80.69°F
December
26.49°C | 79.68°F
May
26.31°C | 79.36°F
April
25.74°C | 78.33°F
January
25.64°C | 78.15°F
March
25.26°C | 77.47°F
February
25.19°C | 77.34°F

Historical Data

Summary
  • 2010
  • 2011
  • 2012
  • 2013
  • 2014
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature28.51°C (83.32°F)27.98°C (82.36°F)27.49°C (81.48°F)
Avg Temperature28.51°C (83.32°F)27.62°C (81.72°F)27.49°C (81.48°F)
Min Temperature27.49°C (81.48°F)27.46°C (81.43°F)26.48°C (79.66°F)
Dew PointMaxAverageMin
Dew Point25.46°C (77.83°F)23.98°C (75.16°F)23.42°C (74.16°F)
PrecipitationMaxAverageMinSum
Precipitation1.73mm | 0.07in0.35mm | 0.01in0.0mm | 0in10.87mm | 0.43in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind33.6kmh | 20.88mph28.77kmh | 17.88mph20.37kmh | 12.66mph
Gust Wind47.86kmh | 29.74mph40.04kmh | 24.88mph27.49kmh | 17.08mph
Sea Level PressureMaxAverageMin
Sea Level Pressure1.73mb0.35mb0.0mb
Sand Island

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
July° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-07-0127.49 | 81.4823.42 | 74.167828.51 | 17.7230.46 | 1031.541.32 | 0.05
2018-07-0227.49 | 81.4823.42 | 74.167933.6 | 20.8830.43 | 1030.520.0 | 0
2018-07-0327.49 | 81.4824.44 | 75.998431.57 | 19.6230.4 | 1029.50.41 | 0.02
2018-07-0427.49 | 81.4823.42 | 74.168128.51 | 17.7230.4 | 1029.51.22 | 0.05
2018-07-0527.49 | 81.4823.42 | 74.168020.37 | 12.6630.43 | 1030.521.73 | 0.07
2018-07-0627.49 | 81.4823.42 | 74.168030.55 | 18.9830.49 | 1032.560.1 | 0.0
2018-07-0727.49 | 81.4823.42 | 74.167933.6 | 20.8830.49 | 1032.560.2 | 0.01
2018-07-0827.49 | 81.4823.42 | 74.167933.6 | 20.8830.49 | 1032.560.41 | 0.02
2018-07-0927.49 | 81.4823.42 | 74.167924.44 | 15.1930.46 | 1031.540.0 | 0
2018-07-1027.49 | 81.4823.42 | 74.168026.48 | 16.4530.46 | 1031.540.0 | 0
2018-07-1127.49 | 81.4824.44 | 75.998231.57 | 19.6230.49 | 1032.560.0 | 0
2018-07-1227.49 | 81.4823.42 | 74.168031.57 | 19.6230.49 | 1032.560.0 | 0
2018-07-1327.49 | 81.4823.42 | 74.168031.57 | 19.6230.49 | 1032.560.1 | 0.0
2018-07-1427.49 | 81.4823.42 | 74.167827.49 | 17.0830.46 | 1031.540.51 | 0.02
2018-07-1527.49 | 81.4823.42 | 74.167827.49 | 17.0830.46 | 1031.540.0 | 0
2018-07-1627.49 | 81.4823.42 | 74.167923.42 | 14.5530.46 | 1031.540.0 | 0
2018-07-1728.51 | 83.3224.44 | 75.998131.57 | 19.6230.49 | 1032.560.0 | 0
2018-07-1827.49 | 81.4824.44 | 75.997929.53 | 18.3530.52 | 1033.570.0 | 0
2018-07-1927.49 | 81.4824.44 | 75.998122.4 | 13.9230.49 | 1032.560.0 | 0
2018-07-2027.49 | 81.4824.44 | 75.998223.42 | 14.5530.46 | 1031.540.2 | 0.01
2018-07-2127.49 | 81.4824.44 | 75.998022.4 | 13.9230.43 | 1030.520.2 | 0.01
2018-07-2228.51 | 83.3224.44 | 75.997930.55 | 18.9830.43 | 1030.520.2 | 0.01
2018-07-2327.49 | 81.4823.42 | 74.167829.53 | 18.3530.46 | 1031.540.2 | 0.01
2018-07-2427.49 | 81.4824.44 | 75.998227.49 | 17.0830.46 | 1031.541.53 | 0.06
2018-07-2527.49 | 81.4824.44 | 75.998329.53 | 18.3530.49 | 1032.560.71 | 0.03
2018-07-2628.51 | 83.3224.44 | 75.998131.57 | 19.6230.49 | 1032.560.0 | 0
2018-07-2727.49 | 81.4824.44 | 75.998331.57 | 19.6230.49 | 1032.560.31 | 0.01
2018-07-2828.51 | 83.3225.46 | 77.838529.53 | 18.3530.46 | 1031.540.71 | 0.03
2018-07-2927.49 | 81.4824.44 | 75.998431.57 | 19.6230.46 | 1031.540.81 | 0.03
2018-07-3027.49 | 81.4824.44 | 75.998328.51 | 17.7230.46 | 1031.540.0 | 0
2018-07-3127.49 | 81.4824.44 | 75.998128.51 | 17.7230.46 | 1031.540.0 | 0

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