The best times to visit Shannon for ideal weather are
May 28th to September 30th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Shannon Travel Guide
Other Shannon Travel Info
Weather in Shannon
Average temperatures in Shannon vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 23rd 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 Shannon, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 67.3°F (19.6°C) with temperatures rarely dropping below 55.1°F (12.8°C) at night.
Shannon Temperatures (Fahrenheit)
Shannon 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.
Shannon Perceived Temperature (F)
Shannon Perceived Temperature (C)
Average Shannon 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 Shannon are April, March, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid April. For example, on the week of April 16th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid November with an average of 4 days of significant precipitation the week of November 12th.
When can you find snow in Shannon? Weather stations report a very small amount of seasonal snow likely to be deepest around January, especially close to early January. The best time to ski (if at all) in Shannon is often around around December 3rd when fresh powder is deepest. 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 Shannon.
Snow on the Ground
The graph below shows the average snow on the ground in Shannon (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
Shannon has some extremely humid months, and above average humidity throughout the year. The least humid month is April (69.2% relative humidity), and the most humid month is November (84.1%).
Wind in Shannon is usually moderate. The windiest month is December, followed by January and May. December’s average wind speed of around 10.6 knots (12.2 MPH or 19.6 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 mid December where average top sustained speeds reach 19.4 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Shannon.
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||10.4||Gentle breeze||18.5||Strong breeze|
|Feb||9.5||Gentle breeze||17.4||Strong breeze|
|Mar||9.9||Gentle breeze||17.2||Strong breeze|
|Apr||9.1||Gentle breeze||15.9||Significant breeze|
|May||10.3||Gentle breeze||17.1||Strong breeze|
|Jun||8.8||Gentle breeze||15||Significant breeze|
|Jul||9||Gentle breeze||15.2||Strong breeze|
|Aug||9.3||Gentle breeze||15.9||Significant breeze|
|Sep||8.8||Gentle breeze||15||Strong breeze|
|Oct||9||Gentle breeze||15.9||Significant breeze|
|Nov||9.7||Gentle breeze||17.3||Strong breeze|
|Dec||10.6||Gentle breeze||18.6||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Shannon?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Ireland; 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 Oct 04, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Shannon, Ireland is July, followed by August and January. 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 Shannon 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 Shannon Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 64.2°F (17.9°C) and 49.8°F (9.9°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 9 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 comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with 9 to 11 days of precipitation per month. June – August is the busiest season for tourism in Shannon, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 64.5°F (18.1°C) and 48.3°F (9.1°C), which will feel chilly 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 too cold this time of year in Shannon to be enjoyable for warm weather travelers. The average high during this season is between 49.8°F (9.9°C) and 46.6°F (8.1°C). On average, it rains or snows a great amount: 9 to 14 times per month. These times of year are fairly slow with tourists.