The best times to visit St John for ideal weather are
March 12th to April 8th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
St John Travel Guide
Other St John Travel Info
Weather in St John
Average temperatures in St John vary very little. Considering humidity, temperatures feel hot all year with a chance of rain throughout most of the year. The area is far less temperate than some — in the 8th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit St John, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 90.8°F (32.7°C) with temperatures rarely dropping below 78.9°F (26.1°C) at night.
St John Temperatures (Fahrenheit)
St John Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
St John Perceived Temperature (F)
St John Perceived Temperature (C)
Average St John Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in St John are March, February, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late February and early March. For example, on the week of February 26th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early November with an average of 4 days of significant precipitation the week of November 5th.
When can you find snow in St John? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in St John.
Snow on the Ground
The graph below shows the average snow on the ground in St John (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
St John has some very humid months, and above average humidity throughout the year. The least humid month is March (65.2% relative humidity), and the most humid month is November (73.1%).
Wind in St John is usually moderate. The windiest month is July, followed by August and June. July’s average wind speed of around 9.5 knots (11 MPH or 17.7 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early July where average top sustained speeds reach 15.8 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in St John.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||8.8||Gentle breeze||14.7||Significant breeze|
|Feb||9.2||Gentle breeze||14.9||Significant breeze|
|Mar||8.8||Gentle breeze||14.5||Significant breeze|
|Apr||9||Gentle breeze||14.5||Significant breeze|
|May||8.5||Gentle breeze||14||Significant breeze|
|Jun||9.2||Gentle breeze||14.7||Significant breeze|
|Jul||9.5||Gentle breeze||15.3||Significant breeze|
|Aug||9.3||Gentle breeze||15.4||Significant breeze|
|Sep||7.6||Gentle breeze||13.3||Significant breeze|
|Oct||7.5||Gentle breeze||13.5||Significant breeze|
|Nov||7.7||Gentle breeze||14.1||Significant breeze|
|Dec||8.9||Gentle breeze||14.8||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to St John?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the Virgin Islands (U.S.); exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 29, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in St John, the US Virgin Islands is July, followed by June and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit St John in November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall St John Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 87.1°F (30.6°C) and 83.3°F (28.5°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 7 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 5 to 9 days of precipitation per month. June – August is the busiest season for tourism in St John, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 88.9°F (31.6°C) and 85.1°F (29.5°C), which will feel very nice given the humidity and wind. It rains or snows a good amount: 8 to 13 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is perfect this time of year in St John to be enjoyable for warm weather travelers. The average high during this season is between 84.8°F (29.3°C) and 83°F (28.3°C). On average, it rains or snows a fair amount: 4 to 7 times per month. These times of year are fairly slow with tourists.
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