The best times to visit Roscommon for ideal weather are
June 25th to September 9th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Roscommon Travel Guide
Weather in Roscommon
Average temperatures in Roscommon vary somewhat. Considering humidity, temperatures feel cold for most of the year with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 11th 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 Roscommon, 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 63.9°F (17.7°C) with temperatures rarely dropping below 51.9°F (11.1°C) at night.
Roscommon Temperatures (Fahrenheit)
Roscommon 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.
Roscommon Perceived Temperature (F)
Roscommon Perceived Temperature (C)
Average Roscommon 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 Roscommon are April, September, 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 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 early December with an average of 4 days of significant precipitation the week of December 3rd.
When can you find snow in Roscommon? Weather stations report very large amounts of snow likely to be deepest around April, especially close to early April. The best time to ski (if at all) in Roscommon is often around around April 2nd 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.
The graph below shows the % chance of rainy and snowy days in Roscommon.
Snow on the Ground
The graph below shows the average snow on the ground in Roscommon (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
Roscommon has some extremely humid months, and high humidity throughout the year. The least humid month is April (74% relative humidity), and the most humid month is December (90.3%).
Wind in Roscommon is usually moderate. The windiest month is January, followed by December and March. January’s average wind speed of around 10.8 knots (12.4 MPH or 20 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 January where average top sustained speeds reach 18.6 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Roscommon.
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||10.8||Gentle breeze||17.8||Strong breeze|
|Feb||9.9||Gentle breeze||16.4||Significant breeze|
|Mar||10.2||Gentle breeze||16.8||Strong breeze|
|Apr||9.1||Gentle breeze||14.9||Significant breeze|
|May||10||Gentle breeze||16||Strong breeze|
|Jun||8.3||Gentle breeze||13.8||Significant breeze|
|Jul||8.2||Gentle breeze||13.8||Strong breeze|
|Aug||8.8||Gentle breeze||14.5||Significant breeze|
|Sep||9||Gentle breeze||14.5||Strong breeze|
|Oct||9.2||Gentle breeze||15.1||Significant breeze|
|Nov||9.7||Gentle breeze||16.3||Strong breeze|
|Dec||10.7||Gentle breeze||17.7||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Roscommon?
Our best data indicates this area is generally safe. As of Aug 21, 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 Aug 14, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Roscommon, 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 Roscommon 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 Roscommon Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 61.1°F (16.2°C) and 46°F (7.8°C) with warmer temperatures in the later months. Rain is very common with 9 to 13 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 brisk. These months see moderate precipitation with 11 to 15 days of precipitation per month. June – August is the busiest season for tourism in Roscommon, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 60.4°F (15.8°C) and 44.7°F (7.1°C), which will feel chilly given the humidity and wind. It rains or snows a great amount: 10 to 16 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 Roscommon to be enjoyable for warm weather travelers. The average high during this season is between 46°F (7.8°C) and 42.7°F (5.9°C). On average, it rains or snows a very great amount: 12 to 17 times per month. These times of year are fairly slow with tourists.