The best times to visit Saint-Germain-en-Laye for ideal weather are
May 7th to October 7th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Saint-Germain-en-Laye Travel Guide
Other Saint-Germain-en-Laye Travel Info
Weather in Saint-Germain-en-Laye
Average temperatures in Saint-Germain-en-Laye vary greatly. 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 35th 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 Saint-Germain-en-Laye, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 78.3°F (25.7°C) with temperatures rarely dropping below 56.9°F (13.8°C) at night.
Saint-Germain-en-Laye Temperatures (Fahrenheit)
Saint-Germain-en-Laye 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.
Saint-Germain-en-Laye Perceived Temperature (F)
Saint-Germain-en-Laye Perceived Temperature (C)
Average Saint-Germain-en-Laye 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 Saint-Germain-en-Laye are April, September, and then October. 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 January. For example, on the week of January 8th 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 3 days of significant precipitation the week of December 3rd.
When can you find snow in Saint-Germain-en-Laye? Weather stations report moderate or seasonal snow likely to be deepest around December, especially close to late December. The best time to ski (if at all) in Saint-Germain-en-Laye is often around around December 17th 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 Saint-Germain-en-Laye.
Snow on the Ground
The graph below shows the average snow on the ground in Saint-Germain-en-Laye (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
Saint-Germain-en-Laye has some extremely humid months, with other comfortably humid months. The least humid month is April (58.2% relative humidity), and the most humid month is November (84.7%).
Wind in Saint-Germain-en-Laye is usually calm. The windiest month is December, followed by January and February. December’s average wind speed of around 5.7 knots (6.5 MPH or 10.5 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late February and early March where average top sustained speeds reach 10 knots, which is considered a gentle breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Saint-Germain-en-Laye.
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||5.6||Light breeze||8.9||Gentle breeze|
|Feb||5.4||Light breeze||8.9||Gentle breeze|
|Mar||5.3||Light breeze||9.1||Gentle breeze|
|Apr||4.8||Light breeze||8.6||Gentle breeze|
|May||4.8||Light breeze||8.4||Gentle breeze|
|Jun||4.7||Light breeze||8.1||Gentle breeze|
|Jul||4.5||Light breeze||8||Gentle breeze|
|Aug||4.2||Light breeze||7.9||Gentle breeze|
|Sep||4.1||Light breeze||7.6||Gentle breeze|
|Oct||4.1||Light breeze||7.4||Gentle breeze|
|Nov||5||Light breeze||8.3||Gentle breeze|
|Dec||5.7||Light breeze||9.1||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Saint-Germain-en-Laye?
Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for France; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 24, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Saint-Germain-en-Laye, France is June, followed by May and July. 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 Saint-Germain-en-Laye 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
Overall Saint-Germain-en-Laye Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 69.2°F (20.7°C) and 50.1°F (10.1°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 6 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 comfortable. These months see moderate precipitation with 6 to 8 days of precipitation per month. June – August is the busiest season for tourism in Saint-Germain-en-Laye, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 71.8°F (22.1°C) and 46.3°F (7.9°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 7 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.
Winter (December through February)
Weather is too cold this time of year in Saint-Germain-en-Laye to be enjoyable for warm weather travelers. The average high during this season is between 50.1°F (10.1°C) and 42.1°F (5.6°C). On average, it rains or snows a fair amount: 6 to 8 times per month. These times of year are the slowest with tourists.