The best times to visit Harpenden for ideal weather are
May 21st 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.
Harpenden Travel Guide
Other Harpenden Travel Info
Weather in Harpenden
Average temperatures in Harpenden 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 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 Harpenden, 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 74.5°F (23.6°C) with temperatures rarely dropping below 56.1°F (13.4°C) at night.
Harpenden Temperatures (Fahrenheit)
Harpenden 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.
Harpenden Perceived Temperature (F)
Harpenden Perceived Temperature (C)
Average Harpenden 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 Harpenden are September, April, and then March. 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 is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid January with an average of 3 days of significant precipitation the week of January 15th.
When can you find snow in Harpenden? Weather stations report moderate or seasonal snow likely to be deepest around December, especially close to early January. The best time to ski (if at all) in Harpenden is often around around January 1st 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 Harpenden.
Snow on the Ground
The graph below shows the average snow on the ground in Harpenden (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
Harpenden has some very humid months, with other comfortably humid months. The least humid month is April (59.8% relative humidity), and the most humid month is November (79.6%).
Wind in Harpenden is usually moderate. The windiest month is January, followed by May and December. January’s average wind speed of around 8.5 knots (9.8 MPH or 15.7 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 15.6 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Harpenden.
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||8.5||Gentle breeze||14.2||Significant breeze|
|Feb||7.9||Gentle breeze||12.9||Significant breeze|
|Mar||8.1||Gentle breeze||13.6||Significant breeze|
|Apr||7.5||Gentle breeze||12.8||Significant breeze|
|May||8.2||Gentle breeze||13.7||Significant breeze|
|Jun||7.7||Gentle breeze||12.8||Significant breeze|
|Jul||7.6||Gentle breeze||12.8||Significant breeze|
|Aug||7.2||Gentle breeze||12.6||Significant breeze|
|Sep||6.8||Light breeze||11.7||Significant breeze|
|Oct||7||Gentle breeze||12.1||Significant breeze|
|Nov||7.6||Gentle breeze||13.1||Significant breeze|
|Dec||8.2||Gentle breeze||13.6||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Harpenden?
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 Harpenden, the United Kingdom is September, 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 Harpenden 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 Harpenden Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 66.8°F (19.3°C) and 50.1°F (10.1°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 7 days of significant precipitation per month. Spring is the slowest 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 moderate precipitation with about 6 days of precipitation per month. June – August is the busiest season for tourism in Harpenden, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 69.5°F (20.8°C) and 48.2°F (9°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 second busiest during these months due to the weather, so hotels may be slightly higher priced.
Winter (December through February)
Weather is too cold this time of year in Harpenden to be enjoyable for warm weather travelers. The average high during this season is between 50.1°F (10.1°C) and 44.7°F (7.1°C). On average, it rains or snows a fair amount: 7 to 9 times per month. These times of year are fairly slow with tourists.
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