The best times to visit Thornton for ideal weather are
May 28th to July 8th
August 27th 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.
Thornton Travel Guide
Weather in Thornton
Average temperatures in Thornton vary somewhat and are temperate for much of the year. The area is in the top 34 percent of tourist destinations for pleasant weather. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Thornton, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late June where highs are regularly around 68.7°F (20.4°C) with temperatures rarely dropping below 45.2°F (7.3°C) at night.
Thornton Temperatures (Fahrenheit)
Thornton 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.
Thornton Perceived Temperature (F)
Thornton Perceived Temperature (C)
Average Thornton 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 precipitation in Thornton are May, July, and then April. The lowest chance of rain or snow occurs around early September. For example, on the week of September 3rd there are only 0.3 days of precipitation on average. By contrast, it’s most likely to rain or snow in mid-May with an average of 1.9 days with significant precipitation the week of May 14th.
When can you find snow in Thornton? Weather stations report no annual snow. 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 Thornton.
Snow on the Ground
The graph below shows the average snow on the ground in Thornton (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
Thornton has far below average humidity compared to most tourist destinations. The least humid month is August (30.7% relative humidity), and the most humid month is February (44.1%).
Wind in Thornton is usually moderate. The windiest month is April, followed by March and January. April’s average wind speed of around 7.6 knots (8.7 MPH or 14.1 KPH) is considered “gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late March where average top sustained speeds reach 19.7 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Thornton.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots.
|Month||Avg. Wind||Meaning (Beaufort)||Avg. Maximum Sustained Wind||Meaning (Beufort)|
|Jan||6.7||a light breeze||15.7||a moderate breeze|
|Feb||6.6||a light breeze||16.2||a moderate breeze|
|Mar||7.1||a gentle breeze||17.2||a moderate breeze|
|Apr||7.6||a gentle breeze||17.9||a fresh breeze|
|May||6.6||a light breeze||16.5||a moderate breeze|
|Jun||6.3||a light breeze||16.3||a moderate breeze|
|Jul||5.8||a light breeze||16.6||a moderate breeze|
|Aug||5.7||a light breeze||15.5||a moderate breeze|
|Sep||5.6||a light breeze||13.9||a moderate breeze|
|Oct||5.8||a light breeze||14.3||a moderate breeze|
|Nov||6.2||a light breeze||14.6||a moderate breeze|
|Dec||6||a light breeze||14.2||a moderate breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Thornton?
As of 6/22/2017 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories.
Overall Thornton Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 60.1°F (15.6°C) and 36.3°F (2.4°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 6 days of precipitation per month. Spring is slow/unreported for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 3 to 5 days of precipitation per month. June – August is slow/unreported season for tourism in Thornton, so lodging and other accommodations may cost as much as usual.
Fall (September through November)
Fall daily highs range from 64.3°F (17.9°C) and 39°F (3.9°C), which will feel chilly given the humidity and wind. It rains or snows a small amount: 3 to 4 days per month. Tourism is slow/unreported during these months due to the weather, so hotels may be normally priced.
Winter (December through February)
Weather is far too cold this time of year in Thornton to be enjoyable for warm weather travelers. The average high during this season is between 38.8°F (3.8°C) and 29.9°F (-1.2°C). On average, it rains or snows a normal amount: 3 to 4 times per month. These times of year are slow/unreported with tourists.