The best times to visit Slough for ideal weather are
May 21st 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.
Slough Travel Guide
Other Slough Travel Info
Weather in Slough
Average temperatures in Slough vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 30th 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 Slough, 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 75.4°F (24.1°C) with temperatures rarely dropping below 56.4°F (13.6°C) at night.
Slough Temperatures (Fahrenheit)
Slough 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.
Slough Perceived Temperature (F)
Slough Perceived Temperature (C)
Average Slough 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 Slough are September, March, 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 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 mid January with an average of 2 days of significant precipitation the week of January 15th.
When can you find snow in Slough? Weather stations report moderate or seasonal snow likely to be deepest around January, especially close to mid January. The best time to ski (if at all) in Slough 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 Slough.
Snow on the Ground
The graph below shows the average snow on the ground in Slough (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
Slough has some very humid months, with other comfortably humid months. The least humid month is June (58.1% relative humidity), and the most humid month is November (79.3%).
Wind in Slough is usually moderate. The windiest month is January, followed by December and May. January’s average wind speed of around 9 knots (10.4 MPH or 16.7 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 May where average top sustained speeds reach 16.1 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Slough.
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||9||Gentle breeze||14.8||Significant breeze|
|Feb||8.1||Gentle breeze||13.4||Significant breeze|
|Mar||8.1||Gentle breeze||13.7||Significant breeze|
|Apr||7.5||Gentle breeze||12.8||Significant breeze|
|May||8.2||Gentle breeze||13.7||Significant breeze|
|Jun||7.8||Gentle breeze||13||Significant breeze|
|Jul||8.2||Gentle breeze||13.7||Significant breeze|
|Aug||7.9||Gentle breeze||13.3||Significant breeze|
|Sep||7.2||Gentle breeze||12.1||Significant breeze|
|Oct||7.4||Gentle breeze||12.6||Significant breeze|
|Nov||7.9||Gentle breeze||13.4||Significant breeze|
|Dec||8.8||Gentle breeze||14.5||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Slough?
Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for the United Kingdom; 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 06, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Slough, the United Kingdom is February, followed by July and March. 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 Slough 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 Slough Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 67.7°F (19.8°C) and 50.4°F (10.2°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 comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with 5 to 7 days of precipitation per month. June – August is the busiest season for tourism in Slough, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 69.8°F (21°C) and 48.8°F (9.3°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 4 to 8 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 Slough to be enjoyable for warm weather travelers. The average high during this season is between 50.4°F (10.2°C) and 45.2°F (7.3°C). On average, it rains or snows a fair amount: 6 to 9 times per month. These times of year are fairly slow with tourists.
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