What’s the climate like in Johnston Atoll?
The current climate of Johnston Atoll features average monthly temperatures ranging from highs of 28°C during the day to lows of 26°C. The average yearly temperature is around 28°C. At night, temperatures in the colder months average around 24°C and in the warmer months around 27°C.
The highest temperature recorded in Johnston Atoll in recent years was 30°C in September 2015. The lowest daytime temperature recorded was 23°C in December 2021.
On average, Johnston Atoll receives 977 mm of precipitation each year. For comparison, UK gets 701 mm of precipitation annually.
Best time to visit Johnston Atoll?
The best time to visit Johnston Atoll for sunny weather is January through August and December. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Johnston Atoll. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Johnston Atoll
The climate table of Johnston Atoll shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 26 | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 |
| Temp. min (°C) | 25 | 25 | 25 | 25 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 26 |
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| Precipitation (mm) | 32 | 33 | 56 | 77 | 66 | 34 | 47 | 99 | 144 | 137 | 144 | 108 |
| UV Index | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 7 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 28°C
- Highest temperature: 28°C in July, August, September, October and November
- Lowest temperature: 26°C in January, February, March and April
- Precipitation: 977 mm per year, averaging 81 mm per month
- Driest months: 32 mm in January, 33 mm in February and 34 mm in June
- Wettest months: 144 mm in September, 144 mm in November and 137 mm in October
Table of Contents
Average Temperature per Month in Johnston Atoll
This graph shows the average maximum temperatures per month in Johnston Atoll, United States Minor Outlying Islands. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Johnston Atoll
This graph shows how much precipitation Johnston Atoll, United States Minor Outlying Islands, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average UV Index per Month in Johnston Atoll
This graph shows the average UV index per month in Johnston Atoll, United States Minor Outlying Islands. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Johnston Atoll
This graph shows the average yearly temperature in Johnston Atoll, United States Minor Outlying Islands. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Johnston Atoll
This chart shows the total yearly precipitation in Johnston Atoll, United States Minor Outlying Islands, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Weather experiences in Johnston Atoll
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Average Weather in Johnston Atoll by Month
Click on a month below to see detailed weather info for Johnston Atoll. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
