The best times to visit Straffan for ideal weather are

June 18th 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.



Other Straffan Travel Info

Weather in Straffan


Average temperatures in Straffan 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 16th 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 Straffan, 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 68.1°F (20.1°C) with temperatures rarely dropping below 53.2°F (11.8°C) at night.

Straffan Temperatures (Fahrenheit)


Straffan Temperatures (Celsius)


“Feels-Like” Temperatures

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.

Straffan Perceived Temperature (F)


Straffan Perceived Temperature (C)



Average Straffan 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.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 45.9 41.1 35.4
Feb 47.1 41.4 35.6
Mar 50.2 43.1 35.8
Apr 55.6 47.8 39.6
May 59.4 51.7 44.1
Jun 64.4 56.7 48.7
Jul 67 59.3 52.3
Aug 65.8 58.4 51.6
Sep 62.5 55.4 48.2
Oct 57.4 51.3 44.7
Nov 50.5 45.5 39.6
Dec 46.4 41.3 35.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 7.7 5.1 1.9
Feb 8.4 5.2 2
Mar 10.1 6.2 2.1
Apr 13.1 8.8 4.2
May 15.2 10.9 6.7
Jun 18 13.7 9.3
Jul 19.4 15.2 11.3
Aug 18.8 14.7 10.9
Sep 16.9 13 9
Oct 14.1 10.7 7.1
Nov 10.3 7.5 4.2
Dec 8 5.2 1.9



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Straffan are March, September, and then April. 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 is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid July with an average of 3 days of significant precipitation the week of July 16th.

When can you find snow in Straffan? Weather stations report a good amount of seasonal snow likely to be deepest around December, especially close to mid December. The best time to ski (if at all) in Straffan is often around around January 15th 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 Straffan.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Straffan (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 30% 1 2.7
Feb 24% 1.7 2.2
Mar 19% 0.6 1.9
Apr 20% 0 1.8
May 23% 0 2.3
Jun 25% 0 3
Jul 33% 0 3.3
Aug 26% 0 3.5
Sep 20% 0 2.3
Oct 24% 0 3.3
Nov 31% 1.7 3.6
Dec 27% 5.2 3.9

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 30 2.5 6.9
Feb 24 4.3 5.6
Mar 19 1.5 4.8
Apr 20 0 4.6
May 23 0 5.8
Jun 25 0 7.6
Jul 33 0 8.4
Aug 26 0 8.9
Sep 20 0 5.8
Oct 24 0 8.4
Nov 31 4.3 9.1
Dec 27 13.2 9.9


Humidity and Wind

Straffan has some extremely humid months, and high humidity throughout the year. The least humid month is April (70.9% relative humidity), and the most humid month is December (85.4%).

Wind in Straffan is usually moderate. The windiest month is January, followed by December and November. January’s average wind speed of around 12.7 knots (14.6 MPH or 23.5 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late December where average top sustained speeds reach 20.5 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Straffan.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

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 12.7 Significant breeze 19.5 Strong breeze
Feb 10.8 Gentle breeze 17.3 Strong breeze
Mar 10.8 Gentle breeze 16.9 Strong breeze
Apr 9.4 Gentle breeze 15.3 Significant breeze
May 10.2 Gentle breeze 15.6 Strong breeze
Jun 8.5 Gentle breeze 13.7 Significant breeze
Jul 8.9 Gentle breeze 14.3 Strong breeze
Aug 9.6 Gentle breeze 14.9 Significant breeze
Sep 9.3 Gentle breeze 14.5 Strong breeze
Oct 10.2 Gentle breeze 16.1 Significant breeze
Nov 11.2 Significant breeze 17.4 Strong breeze
Dec 12.5 Significant breeze 19.3 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 83.2%
Feb 82.2%
Mar 75%
Apr 70.9%
May 71.5%
Jun 71.7%
Jul 75.7%
Aug 76.9%
Sep 78.5%
Oct 81.5%
Nov 85.2%
Dec 85.4%


Is it Safe to Travel to Straffan?

Our best data indicates this area is generally safe. As of Dec 04, 2023 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 Nov 28, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Straffan, Ireland is January, followed by July and February. 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 Straffan in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 68.9 in December means 68.9% of the tourists vs. January.



Overall Straffan Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 63.5°F (17.5°C) and 48.3°F (9.1°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 7 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with 7 to 10 days of precipitation per month. June – August is the busiest season for tourism in Straffan, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 63.8°F (17.7°C) and 46.2°F (7.9°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 6 to 9 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 Straffan to be enjoyable for warm weather travelers. The average high during this season is between 48.4°F (9.1°C) and 45°F (7.2°C). On average, it rains or snows a fair amount: 7 to 9 times per month. These times of year are the second busiest with tourists.


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