The best times to visit St Johns for ideal weather are
April 30th to October 14th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
St Johns Travel Guide
Other St Johns Travel Info
Weather in St Johns
Average temperatures in St Johns vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 46th 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 Johns, the hottest months are July, June, and then August. See average monthly temperatures below. The warmest time of year is generally late June where highs are regularly around 94.3°F (34.6°C) with temperatures rarely dropping below 58.2°F (14.6°C) at night.
St Johns Temperatures (Fahrenheit)
St Johns 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 Johns Perceived Temperature (F)
St Johns Perceived Temperature (C)
Average St Johns 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 Johns are March, April, 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 early to mid March. For example, on the week of March 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early August with an average of 2 days of significant precipitation the week of July 30th.
When can you find snow in St Johns? 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 Johns.
Snow on the Ground
The graph below shows the average snow on the ground in St Johns (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 Johns has some comfortably humid months, with some very dry months. The least humid month is June (11.3% relative humidity), and the most humid month is December (48.3%).
Wind in St Johns is usually calm. The windiest month is April, followed by May and June. April’s average wind speed of around 9.2 knots (10.5 MPH or 17 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 to mid April where average top sustained speeds reach 21.7 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in St Johns.
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||4.4||Light breeze||11.7||Significant breeze|
|Feb||6.5||Light breeze||16.1||Significant breeze|
|Mar||7.4||Gentle breeze||18.2||Significant breeze|
|Apr||9.2||Gentle breeze||21.1||Strong breeze|
|May||8.4||Gentle breeze||19.9||Significant breeze|
|Jun||7.8||Gentle breeze||19.2||Strong breeze|
|Jul||6.2||Light breeze||18.5||Significant breeze|
|Aug||5.3||Light breeze||15.8||Significant breeze|
|Sep||5||Light breeze||14.6||Significant breeze|
|Oct||5.4||Light breeze||13.9||Significant breeze|
|Nov||5.1||Light breeze||12.9||Significant breeze|
|Dec||5.3||Light breeze||13.5||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to St Johns?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; 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 Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in St Johns, AZ, US is July, followed by March and June. 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 Johns 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 Johns Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 87°F (30.6°C) and 59.4°F (15.2°C) with warmer temperatures in the later months. Rain is extremely rare with 0 to 1 days of significant precipitation per month. Spring is the 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 the most precipitation with 0 to 5 days of precipitation per month. June – August is the second busiest season for tourism in St Johns, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 85.4°F (29.7°C) and 56.4°F (13.6°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 2 to 4 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 far too cold this time of year in St Johns to be enjoyable for warm weather travelers. The average high during this season is between 59.4°F (15.2°C) and 44.9°F (7.2°C). On average, it rains or snows a smalll amount: 1 to 2 times per month. These times of year are fairly slow with tourists.