Johnston Atoll, United States Minor Outlying Islands Climate
Weather: 25.1°C/77.18°F, Wind SW at 7.78 km/h, 79% Humidity, 0% Chance of rain
(Photo by Ubey Ahmed on Unsplash)
Johnston Atoll Climate Summary
Located at an elevation of -14.34 meters (-47.05 feet) above sea level, Johnston Atoll has a Tropical rainforest climate climate (Classification: Af). The city’s yearly temperature is 26.18ºC (79.12ºF) and it is -0.15% lower than United States Minor Outlying Islands’s averages. Johnston Atoll typically receives about 72.32 millimeters (2.85 inches) of precipitation and has 145.1 rainy days (39.75% of the time) annually.
Country | United States Minor Outlying Islands |
Longitude | -169.5336477 |
Latitude | 16.7295035 |
Attitude/Elevation | -14.34m (-47.05ft) |
Local time | Friday 03:24 |
Annual high temperature | 26.45ºC (79.61ºF) |
Annual low temperature | 25.6ºC (78.08ºF) |
Average annual precip. | 72.32mm (2.85in) |
Warmest month | September (27.73ºC / 81.91ºF) |
Coldest Month | February (24.15ºC / 75.47ºF) |
Wettest Month | December (128.45mm / 5.06in) |
Driest Month | January (29.79mm / 1.17in) |
Number of days with rainfall (≥ 1.0 mm) | 145.1 days (39.75%) |
Days with no rain | 219.9 days (60.25%) |
Humidity | 77.22% |
Climate Johnston Atoll: Monthly Averages
Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Nov | Oct | Dec | Year |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Record high °C (°F) | 27.0(80.6) | 26.0(78.8) | 27.0(80.6) | 27.0(80.6) | 27.0(80.6) | 29.0(84.2) | 29.0(84.2) | 29.0(84.2) | 30.0(86.0) | 29.0(84.2) | 29.0(84.2) | 28.0(82.4) | 30.0(86.0) |
Average high °C (°F) | 25.5(77.9) | 25.03(77.05) | 25.1(77.18) | 25.54(77.97) | 26.11(79.0) | 26.73(80.11) | 27.14(80.85) | 27.62(81.72) | 27.73(81.91) | 27.54(81.57) | 27.09(80.76) | 26.24(79.23) | 26.45(79.61) |
Daily mean °C (°F) | 25.18(77.32) | 24.74(76.53) | 24.81(76.66) | 25.28(77.5) | 25.84(78.51) | 26.56(79.81) | 26.88(80.38) | 27.29(81.12) | 27.47(81.45) | 27.28(81.1) | 26.83(80.29) | 26.01(78.82) | 26.18(79.12) |
Average low °C (°F) | 24.57(76.23) | 24.15(75.47) | 24.17(75.51) | 24.71(76.48) | 25.37(77.67) | 26.08(78.94) | 26.38(79.48) | 26.72(80.1) | 26.91(80.44) | 26.63(79.93) | 26.16(79.09) | 25.38(77.68) | 25.6(78.08) |
Record low °C (°F) | 17.0(62.6) | 16.0(60.8) | 17.0(62.6) | 17.0(62.6) | 18.0(64.4) | 18.0(64.4) | 20.0(68.0) | 19.0(66.2) | 19.0(66.2) | 19.0(66.2) | 19.0(66.2) | 18.0(64.4) | 16.0(60.8) |
Average precipitation mm (inches) | 29.79(1.17) | 60.52(2.38) | 51.66(2.03) | 51.93(2.04) | 57.18(2.25) | 29.91(1.18) | 56.62(2.23) | 97.54(3.84) | 98.4(3.87) | 99.74(3.93) | 106.09(4.18) | 128.45(5.06) | 72.32(2.85) |
Average precipitation days (≥ 1.0 mm) | 7.18 | 10.45 | 12.09 | 10.64 | 11.0 | 10.36 | 10.91 | 13.73 | 15.64 | 15.55 | 15.91 | 11.64 | 12.09 |
Average relative humidity (%) | 75.45 | 75.54 | 77.34 | 77.98 | 77.97 | 77.75 | 77.92 | 77.92 | 77.47 | 77.34 | 77.31 | 76.65 | 77.22 |
Mean monthly sunshine hours | 9.94 | 10.46 | 10.31 | 11.28 | 12.42 | 12.76 | 12.44 | 11.33 | 10.85 | 8.99 | 7.82 | 7.75 | 10.53 |
Climate Graph
The chart below shows the mean monthly temperature and precipitation of Johnston Atoll in recent years.
Johnston Atoll Temperature by Month
September | 27.47°C | 81.45°F | |
August | 27.29°C | 81.12°F | |
October | 27.28°C | 81.1°F | |
July | 26.88°C | 80.38°F | |
November | 26.83°C | 80.29°F | |
June | 26.56°C | 79.81°F | |
December | 26.01°C | 78.82°F | |
May | 25.84°C | 78.51°F | |
April | 25.28°C | 77.5°F | |
January | 25.18°C | 77.32°F | |
March | 24.81°C | 76.66°F | |
February | 24.74°C | 76.53°F |
Historical Data
Temperature | Max | Average | Min | |
---|---|---|---|---|
Max Temperature | 27.0°C (80.6°F) | 26.93°C (80.47°F) | 26.0°C (78.8°F) | |
Avg Temperature | 27.0°C (80.6°F) | 26.73°C (80.11°F) | 26.0°C (78.8°F) | |
Min Temperature | 27.0°C (80.6°F) | 26.43°C (79.57°F) | 26.0°C (78.8°F) | |
Dew Point | Max | Average | Min | |
Dew Point | 24.0°C (75.2°F) | 22.8°C (73.04°F) | 22.0°C (71.6°F) | |
Precipitation | Max | Average | Min | Sum |
Precipitation | 5.4mm | 0.21in | 0.37mm | 0.01in | 0.0mm | 0in | 11.0mm | 0.43in |
Snowdepth | 0.0mm | 0in | 0.0mm | 0in | 0.0mm | 0in | 0.0mm | 0in |
Wind | Max | Average | Min | |
Wind | 35.0kmh | 21.75mph | 26.37kmh | 16.39mph | 19.0kmh | 11.81mph | |
Gust Wind | 49.0kmh | 30.45mph | 36.5kmh | 22.68mph | 26.0kmh | 16.16mph | |
Sea Level Pressure | Max | Average | Min | |
Sea Level Pressure | 5.4mb | 0.37mb | 0.0mb |
Daily Observations
Time | Temperature | Dew Point | Humidity | Wind Speed | Pressure | Precipitation |
---|---|---|---|---|---|---|
June | ° C | ° F | ° C | ° F | % | Kph | Mph | Hg | Mb | Total (mm/in) |
2018-06-01 | 26 | 78.8 | 23 | 73.4 | 82 | 23 | 14.29 | 29.94 | 1014 | 0.1 | 0.0 |
2018-06-02 | 26 | 78.8 | 22 | 71.6 | 80 | 19 | 11.81 | 29.88 | 1012 | 0.0 | 0.0 |
2018-06-03 | 27 | 80.6 | 23 | 73.4 | 82 | 22 | 13.67 | 29.85 | 1011 | 5.4 | 0.21 |
2018-06-04 | 27 | 80.6 | 24 | 75.2 | 85 | 35 | 21.75 | 29.97 | 1015 | 0.0 | 0.0 |
2018-06-05 | 27 | 80.6 | 23 | 73.4 | 81 | 34 | 21.13 | 30.0 | 1016 | 0.1 | 0.0 |
2018-06-06 | 26 | 78.8 | 23 | 73.4 | 81 | 29 | 18.02 | 29.97 | 1015 | 0.1 | 0.0 |
2018-06-07 | 26 | 78.8 | 22 | 71.6 | 79 | 26 | 16.16 | 29.97 | 1015 | 0.0 | 0.0 |
2018-06-08 | 26 | 78.8 | 23 | 73.4 | 79 | 27 | 16.78 | 30.0 | 1016 | 0.0 | 0.0 |
2018-06-09 | 27 | 80.6 | 23 | 73.4 | 82 | 30 | 18.64 | 30.03 | 1017 | 0.1 | 0.0 |
2018-06-10 | 26 | 78.8 | 23 | 73.4 | 82 | 26 | 16.16 | 30.0 | 1016 | 0.0 | 0.0 |
2018-06-11 | 27 | 80.6 | 23 | 73.4 | 78 | 26 | 16.16 | 29.94 | 1014 | 0.0 | 0.0 |
2018-06-12 | 27 | 80.6 | 22 | 71.6 | 77 | 22 | 13.67 | 29.91 | 1013 | 0.0 | 0.0 |
2018-06-13 | 26 | 78.8 | 22 | 71.6 | 78 | 23 | 14.29 | 29.94 | 1014 | 0.1 | 0.0 |
2018-06-14 | 27 | 80.6 | 23 | 73.4 | 77 | 20 | 12.43 | 29.94 | 1014 | 0.0 | 0.0 |
2018-06-15 | 26 | 78.8 | 22 | 71.6 | 76 | 21 | 13.05 | 29.94 | 1014 | 0.0 | 0.0 |
2018-06-16 | 27 | 80.6 | 22 | 71.6 | 78 | 22 | 13.67 | 29.94 | 1014 | 0.0 | 0.0 |
2018-06-17 | 27 | 80.6 | 22 | 71.6 | 76 | 26 | 16.16 | 29.97 | 1015 | 0.1 | 0.0 |
2018-06-18 | 27 | 80.6 | 22 | 71.6 | 76 | 28 | 17.4 | 30.0 | 1016 | 0.1 | 0.0 |
2018-06-19 | 27 | 80.6 | 22 | 71.6 | 78 | 25 | 15.53 | 29.97 | 1015 | 0.8 | 0.03 |
2018-06-20 | 27 | 80.6 | 23 | 73.4 | 78 | 20 | 12.43 | 29.94 | 1014 | 0.2 | 0.01 |
2018-06-21 | 27 | 80.6 | 23 | 73.4 | 79 | 20 | 12.43 | 29.91 | 1013 | 0.0 | 0.0 |
2018-06-22 | 27 | 80.6 | 23 | 73.4 | 79 | 26 | 16.16 | 29.91 | 1013 | 0.1 | 0.0 |
2018-06-23 | 27 | 80.6 | 23 | 73.4 | 80 | 32 | 19.88 | 29.94 | 1014 | 1.5 | 0.06 |
2018-06-24 | 27 | 80.6 | 23 | 73.4 | 79 | 29 | 18.02 | 29.94 | 1014 | 0.1 | 0.0 |
2018-06-25 | 27 | 80.6 | 23 | 73.4 | 79 | 31 | 19.26 | 29.94 | 1014 | 0.3 | 0.01 |
2018-06-26 | 27 | 80.6 | 22 | 71.6 | 77 | 29 | 18.02 | 29.94 | 1014 | 0.0 | 0.0 |
2018-06-27 | 27 | 80.6 | 23 | 73.4 | 79 | 32 | 19.88 | 29.91 | 1013 | 0.0 | 0.0 |
2018-06-28 | 27 | 80.6 | 24 | 75.2 | 81 | 33 | 20.51 | 29.91 | 1013 | 0.4 | 0.02 |
2018-06-29 | 27 | 80.6 | 24 | 75.2 | 82 | 29 | 18.02 | 29.91 | 1013 | 0.0 | 0.0 |
2018-06-30 | 27 | 80.6 | 24 | 75.2 | 82 | 26 | 16.16 | 29.91 | 1013 | 1.5 | 0.06 |
Johnston Atoll 10 Year Historical Weather Data
- Johnston Atoll weather in June 2010
- Johnston Atoll weather in June 2011
- Johnston Atoll weather in June 2012
- Johnston Atoll weather in June 2013
- Johnston Atoll weather in June 2014
- Johnston Atoll weather in June 2015
- Johnston Atoll weather in June 2016
- Johnston Atoll weather in June 2017
- Johnston Atoll weather in June 2019
- Johnston Atoll weather in June 2020
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