The best times to visit Thornleigh for ideal weather are

April 2nd to May 27th

or

August 20th to October 28th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Thornleigh Travel Info

Weather in Thornleigh

Temperature

Average temperatures in Thornleigh vary somewhat. Considering humidity, temperatures feel very enjoyable all year with a fair chance of precipitation about half of the year. The area is more temperate than most — in the 61st 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 Thornleigh, the hottest months are January, February, and then December. See average monthly temperatures below. The warmest time of year is generally mid January where highs are regularly around 83.9°F (28.8°C) with temperatures rarely dropping below 65.7°F (18.7°C) at night.

Thornleigh Temperatures (Fahrenheit)

Key
High
Average
Low

Thornleigh Temperatures (Celsius)

Key
High
Average
Low

“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.

Thornleigh Perceived Temperature (F)

Key
High
Average
Low

Thornleigh Perceived Temperature (C)

Key
High
Average
Low

 

Average Thornleigh 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 83.4 73.9 66.2
Feb 80.9 72.5 65.9
Mar 79.9 70.4 62.5
Apr 73.8 64.3 56.3
May 69.7 58.9 50.3
Jun 64.1 54.8 47.2
Jul 63.7 53.1 44
Aug 66.9 55.8 45.6
Sep 72.2 60.9 50.1
Oct 76.3 65.2 55.1
Nov 78.7 68.9 60.6
Dec 80.1 70.7 62.7

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 28.6 23.3 19
Feb 27.2 22.5 18.8
Mar 26.6 21.3 16.9
Apr 23.2 17.9 13.5
May 20.9 14.9 10.2
Jun 17.8 12.7 8.4
Jul 17.6 11.7 6.7
Aug 19.4 13.2 7.6
Sep 22.3 16.1 10.1
Oct 24.6 18.4 12.8
Nov 25.9 20.5 15.9
Dec 26.7 21.5 17.1

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Thornleigh are August, May, and then July. 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 May. For example, on the week of May 7th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late February and early March with an average of 3 days of significant precipitation the week of February 26th.

When can you find snow in Thornleigh? 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 Thornleigh.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 16% 0 3
Feb 27% 0 5.3
Mar 20% 0 3.8
Apr 21% 0 5.1
May 12% 0 2.5
Jun 25% 0 5.5
Jul 13% 0 2
Aug 12% 0 2.3
Sep 13% 0 1.9
Oct 17% 0 2.3
Nov 26% 0 4.2
Dec 23% 0 3.9

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 16 0 7.6
Feb 27 0 13.5
Mar 20 0 9.7
Apr 21 0 13
May 12 0 6.4
Jun 25 0 14
Jul 13 0 5.1
Aug 12 0 5.8
Sep 13 0 4.8
Oct 17 0 5.8
Nov 26 0 10.7
Dec 23 0 9.9

 

Humidity and Wind

Thornleigh has some high humidity months, with other comfortably humid months. The least humid month is September (53.1% relative humidity), and the most humid month is June (68.6%).

Wind in Thornleigh is usually calm. The windiest month is January, followed by November and December. January’s average wind speed of around 5.2 knots (5.9 MPH or 9.5 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 September where average top sustained speeds reach 11.3 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

Key
Avg. Relative Humidity

Wind

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

Key
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 5.2 Light breeze 9.8 Gentle breeze
Feb 4.5 Light breeze 8.9 Gentle breeze
Mar 3.8 Barely noticeable 8.1 Gentle breeze
Apr 3.8 Barely noticeable 7.6 Gentle breeze
May 3.5 Barely noticeable 7.1 Gentle breeze
Jun 3.8 Barely noticeable 7.2 Gentle breeze
Jul 4.3 Light breeze 8.2 Gentle breeze
Aug 4.7 Light breeze 9 Gentle breeze
Sep 4.9 Light breeze 9.8 Gentle breeze
Oct 4.8 Light breeze 9.6 Gentle breeze
Nov 5.2 Light breeze 10 Gentle breeze
Dec 5.1 Light breeze 10.1 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 61.5%
Feb 67.3%
Mar 64.5%
Apr 66.6%
May 63.5%
Jun 68.6%
Jul 60.3%
Aug 54.1%
Sep 53.1%
Oct 55.8%
Nov 61.8%
Dec 61.1%

 

Is it Safe to Travel to Thornleigh?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for Australia; 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 30, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Thornleigh, NW, Australia is August, followed by February and May. 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 Thornleigh in July. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
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 81 in July means 81% of the tourists vs. August.

 

 

Overall Thornleigh Travel Experience by Season

Fall (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 81.3°F (27.4°C) and 66.2°F (19°C) with colder temperatures in the later months. Rain is somewhat common with 4 to 6 days of significant precipitation per month. Fall is the second busiest for tourism, which makes it a good time for those looking for things to do.

Winter (June through August)

The middle-year months have cold weather with high temperatures that are brisk. These months see the least precipitation with 4 to 8 days of precipitation per month. June – August is fairly slow season for tourism in Thornleigh, so lodging and other accommodations may cost slightly less.

Spring (September through November)

Spring daily highs range from 80.4°F (26.9°C) and 68.3°F (20.2°C), which will feel very nice 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.

Summer (December through February)

Weather is perfect this time of year in Thornleigh to be enjoyable for warm weather travelers. The average high during this season is between 83.9°F (28.8°C) and 79.2°F (26.2°C). On average, it rains or snows a fair amount: 5 to 8 times per month. These times of year are the busiest with tourists.

 

Best Times to Travel› Australia › Thornleigh, NW, Australia