Sand Island, Johnston Atoll, United States Minor Outlying Islands Climate
Weather: 25.27°C/77.49°F, Wind SW at 6.87 km/h, 80% Humidity, 0% Chance of rain
(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.
Country | United States Minor Outlying Islands |
City | Johnston Atoll |
Longitude | -169.5336477 |
Latitude | 16.7295035 |
Attitude/Elevation | -14.34m (-47.05ft) |
Local time | Tuesday 01:26 |
Annual high temperature | 26.93ºC (80.47ºF) |
Annual low temperature | 26.07ºC (78.93ºF) |
Average annual precip. | 73.64mm (2.9in) |
Warmest month | September (28.24ºC / 82.83ºF) |
Coldest Month | February (24.59ºC / 76.26ºF) |
Wettest Month | December (130.8mm / 5.15in) |
Driest Month | January (30.34mm / 1.19in) |
Number of days with rainfall (≥ 1.0 mm) | 147.75 days (40.48%) |
Days with no rain | 217.25 days (59.52%) |
Humidity | 78.63% |
Climate Sand Island: Weather By Month
Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Nov | Oct | Dec | Year |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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) | 7.31 | 10.64 | 12.31 | 10.83 | 11.2 | 10.55 | 11.11 | 13.98 | 15.93 | 15.83 | 16.2 | 11.85 | 12.31 |
Average relative humidity (%) | 76.83 | 76.92 | 78.76 | 79.41 | 79.4 | 79.17 | 79.35 | 79.35 | 78.89 | 78.76 | 78.72 | 78.05 | 78.63 |
Mean monthly sunshine hours | 10.12 | 10.65 | 10.5 | 11.49 | 12.65 | 12.99 | 12.67 | 11.54 | 11.05 | 9.15 | 7.96 | 7.89 | 10.72 |
Climate Graph
The chart below shows the mean monthly temperature and precipitation of Sand Island in recent years.
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
Temperature | Max | Average | Min | |
---|---|---|---|---|
Max Temperature | 28.51°C (83.32°F) | 27.98°C (82.36°F) | 27.49°C (81.48°F) | |
Avg Temperature | 28.51°C (83.32°F) | 27.62°C (81.72°F) | 27.49°C (81.48°F) | |
Min Temperature | 27.49°C (81.48°F) | 27.46°C (81.43°F) | 26.48°C (79.66°F) | |
Dew Point | Max | Average | Min | |
Dew Point | 25.46°C (77.83°F) | 23.98°C (75.16°F) | 23.42°C (74.16°F) | |
Precipitation | Max | Average | Min | Sum |
Precipitation | 1.73mm | 0.07in | 0.35mm | 0.01in | 0.0mm | 0in | 10.87mm | 0.43in |
Snowdepth | 0.0mm | 0in | 0.0mm | 0in | 0.0mm | 0in | 0.0mm | 0in |
Wind | Max | Average | Min | |
Wind | 33.6kmh | 20.88mph | 28.77kmh | 17.88mph | 20.37kmh | 12.66mph | |
Gust Wind | 47.86kmh | 29.74mph | 40.04kmh | 24.88mph | 27.49kmh | 17.08mph | |
Sea Level Pressure | Max | Average | Min | |
Sea Level Pressure | 1.73mb | 0.35mb | 0.0mb |
Daily Observations
Time | Temperature | Dew Point | Humidity | Wind Speed | Pressure | Precipitation |
---|---|---|---|---|---|---|
July | ° C | ° F | ° C | ° F | % | Kph | Mph | Hg | Mb | Total (mm/in) |
2018-07-01 | 27.49 | 81.48 | 23.42 | 74.16 | 78 | 28.51 | 17.72 | 30.46 | 1031.54 | 1.32 | 0.05 |
2018-07-02 | 27.49 | 81.48 | 23.42 | 74.16 | 79 | 33.6 | 20.88 | 30.43 | 1030.52 | 0.0 | 0 |
2018-07-03 | 27.49 | 81.48 | 24.44 | 75.99 | 84 | 31.57 | 19.62 | 30.4 | 1029.5 | 0.41 | 0.02 |
2018-07-04 | 27.49 | 81.48 | 23.42 | 74.16 | 81 | 28.51 | 17.72 | 30.4 | 1029.5 | 1.22 | 0.05 |
2018-07-05 | 27.49 | 81.48 | 23.42 | 74.16 | 80 | 20.37 | 12.66 | 30.43 | 1030.52 | 1.73 | 0.07 |
2018-07-06 | 27.49 | 81.48 | 23.42 | 74.16 | 80 | 30.55 | 18.98 | 30.49 | 1032.56 | 0.1 | 0.0 |
2018-07-07 | 27.49 | 81.48 | 23.42 | 74.16 | 79 | 33.6 | 20.88 | 30.49 | 1032.56 | 0.2 | 0.01 |
2018-07-08 | 27.49 | 81.48 | 23.42 | 74.16 | 79 | 33.6 | 20.88 | 30.49 | 1032.56 | 0.41 | 0.02 |
2018-07-09 | 27.49 | 81.48 | 23.42 | 74.16 | 79 | 24.44 | 15.19 | 30.46 | 1031.54 | 0.0 | 0 |
2018-07-10 | 27.49 | 81.48 | 23.42 | 74.16 | 80 | 26.48 | 16.45 | 30.46 | 1031.54 | 0.0 | 0 |
2018-07-11 | 27.49 | 81.48 | 24.44 | 75.99 | 82 | 31.57 | 19.62 | 30.49 | 1032.56 | 0.0 | 0 |
2018-07-12 | 27.49 | 81.48 | 23.42 | 74.16 | 80 | 31.57 | 19.62 | 30.49 | 1032.56 | 0.0 | 0 |
2018-07-13 | 27.49 | 81.48 | 23.42 | 74.16 | 80 | 31.57 | 19.62 | 30.49 | 1032.56 | 0.1 | 0.0 |
2018-07-14 | 27.49 | 81.48 | 23.42 | 74.16 | 78 | 27.49 | 17.08 | 30.46 | 1031.54 | 0.51 | 0.02 |
2018-07-15 | 27.49 | 81.48 | 23.42 | 74.16 | 78 | 27.49 | 17.08 | 30.46 | 1031.54 | 0.0 | 0 |
2018-07-16 | 27.49 | 81.48 | 23.42 | 74.16 | 79 | 23.42 | 14.55 | 30.46 | 1031.54 | 0.0 | 0 |
2018-07-17 | 28.51 | 83.32 | 24.44 | 75.99 | 81 | 31.57 | 19.62 | 30.49 | 1032.56 | 0.0 | 0 |
2018-07-18 | 27.49 | 81.48 | 24.44 | 75.99 | 79 | 29.53 | 18.35 | 30.52 | 1033.57 | 0.0 | 0 |
2018-07-19 | 27.49 | 81.48 | 24.44 | 75.99 | 81 | 22.4 | 13.92 | 30.49 | 1032.56 | 0.0 | 0 |
2018-07-20 | 27.49 | 81.48 | 24.44 | 75.99 | 82 | 23.42 | 14.55 | 30.46 | 1031.54 | 0.2 | 0.01 |
2018-07-21 | 27.49 | 81.48 | 24.44 | 75.99 | 80 | 22.4 | 13.92 | 30.43 | 1030.52 | 0.2 | 0.01 |
2018-07-22 | 28.51 | 83.32 | 24.44 | 75.99 | 79 | 30.55 | 18.98 | 30.43 | 1030.52 | 0.2 | 0.01 |
2018-07-23 | 27.49 | 81.48 | 23.42 | 74.16 | 78 | 29.53 | 18.35 | 30.46 | 1031.54 | 0.2 | 0.01 |
2018-07-24 | 27.49 | 81.48 | 24.44 | 75.99 | 82 | 27.49 | 17.08 | 30.46 | 1031.54 | 1.53 | 0.06 |
2018-07-25 | 27.49 | 81.48 | 24.44 | 75.99 | 83 | 29.53 | 18.35 | 30.49 | 1032.56 | 0.71 | 0.03 |
2018-07-26 | 28.51 | 83.32 | 24.44 | 75.99 | 81 | 31.57 | 19.62 | 30.49 | 1032.56 | 0.0 | 0 |
2018-07-27 | 27.49 | 81.48 | 24.44 | 75.99 | 83 | 31.57 | 19.62 | 30.49 | 1032.56 | 0.31 | 0.01 |
2018-07-28 | 28.51 | 83.32 | 25.46 | 77.83 | 85 | 29.53 | 18.35 | 30.46 | 1031.54 | 0.71 | 0.03 |
2018-07-29 | 27.49 | 81.48 | 24.44 | 75.99 | 84 | 31.57 | 19.62 | 30.46 | 1031.54 | 0.81 | 0.03 |
2018-07-30 | 27.49 | 81.48 | 24.44 | 75.99 | 83 | 28.51 | 17.72 | 30.46 | 1031.54 | 0.0 | 0 |
2018-07-31 | 27.49 | 81.48 | 24.44 | 75.99 | 81 | 28.51 | 17.72 | 30.46 | 1031.54 | 0.0 | 0 |
Sand Island 11 Year Historical Weather Data
- Sand Island, Johnston Atoll weather in July 2010
- Sand Island, Johnston Atoll weather in July 2011
- Sand Island, Johnston Atoll weather in July 2012
- Sand Island, Johnston Atoll weather in July 2013
- Sand Island, Johnston Atoll weather in July 2014
- Sand Island, Johnston Atoll weather in July 2015
- Sand Island, Johnston Atoll weather in July 2016
- Sand Island, Johnston Atoll weather in July 2017
- Sand Island, Johnston Atoll weather in July 2019
- Sand Island, Johnston Atoll weather in July 2020
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