The best times to visit Clanwilliam for ideal weather are

September 10th to May 13th

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



Other Clanwilliam Travel Info

Weather in Clanwilliam


Average temperatures in Clanwilliam vary little. Considering humidity, temperatures feel very enjoyable all year with a very low chance of rain or snow throughout the year. The area is more temperate than most — in the 84th 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 Clanwilliam, the hottest months are February, January, and then December. See average monthly temperatures below. The warmest time of year is generally early February where highs are regularly around 82.7°F (28.2°C) with temperatures rarely dropping below 59.6°F (15.3°C) at night.

Clanwilliam Temperatures (Fahrenheit)


Clanwilliam Temperatures (Celsius)


“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.

Clanwilliam Perceived Temperature (F)


Clanwilliam Perceived Temperature (C)



Average Clanwilliam 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 79 66.9 57.7
Feb 80.2 67.4 58.3
Mar 78.7 65.3 56.4
Apr 77.4 63.1 54.2
May 71.7 58.8 51.5
Jun 68 55.5 48.6
Jul 68.6 55 47.1
Aug 69.4 55 46.9
Sep 69.7 56.9 48
Oct 72.6 60.4 51
Nov 74.9 62.9 53
Dec 76.9 65.5 56.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 26.1 19.4 14.3
Feb 26.8 19.7 14.6
Mar 25.9 18.5 13.6
Apr 25.2 17.3 12.3
May 22.1 14.9 10.8
Jun 20 13.1 9.2
Jul 20.3 12.8 8.4
Aug 20.8 12.8 8.3
Sep 20.9 13.8 8.9
Oct 22.6 15.8 10.6
Nov 23.8 17.2 11.7
Dec 24.9 18.6 13.6



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Clanwilliam are February, January, and then December. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid January. For example, on the week of January 15th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late July with an average of 1 days of significant precipitation the week of July 23rd.

When can you find snow in Clanwilliam? 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 Clanwilliam.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 1% 0 0.1
Feb 0% 0 0.1
Mar 2% 0 0.2
Apr 4% 0 0.4
May 9% 0 0.8
Jun 14% 0 1.4
Jul 14% 0 1.3
Aug 9% 0 0.8
Sep 3% 0 0.4
Oct 4% 0 0.3
Nov 4% 0 0.7
Dec 2% 0 0.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 1 0 0.3
Feb 0 0 0.3
Mar 2 0 0.5
Apr 4 0 1
May 9 0 2
Jun 14 0 3.6
Jul 14 0 3.3
Aug 9 0 2
Sep 3 0 1
Oct 4 0 0.8
Nov 4 0 1.8
Dec 2 0 0.5


Humidity and Wind

Clanwilliam has some high humidity months, with other comfortably humid months. The least humid month is April (59.5% relative humidity), and the most humid month is May (69.4%).

Wind in Clanwilliam is usually calm. The windiest month is November, followed by June and January. November’s average wind speed of around 6.6 knots (7.6 MPH or 12.3 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 November to early December where average top sustained speeds reach 10.8 knots, which is considered a gentle breeze.

Relative Humidity (%)

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

Avg. Relative Humidity


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

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 6.4 Light breeze 9.9 Gentle breeze
Feb 6 Light breeze 9.6 Gentle breeze
Mar 5.7 Light breeze 9.1 Gentle breeze
Apr 5.9 Light breeze 8.9 Gentle breeze
May 5.6 Light breeze 8 Gentle breeze
Jun 6.4 Light breeze 8.9 Gentle breeze
Jul 6.2 Light breeze 8.6 Gentle breeze
Aug 6.2 Light breeze 8.7 Gentle breeze
Sep 6.1 Light breeze 8.8 Gentle breeze
Oct 6.3 Light breeze 9.6 Gentle breeze
Nov 6.6 Light breeze 9.9 Gentle breeze
Dec 6.2 Light breeze 9.6 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 66.7%
Feb 66%
Mar 66.2%
Apr 59.5%
May 69.4%
Jun 68.6%
Jul 64.3%
Aug 67.2%
Sep 67%
Oct 65.6%
Nov 63.2%
Dec 67%


Is it Safe to Travel to Clanwilliam?

Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for South Africa; 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 Aug 22, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Clanwilliam, South Africa is January, followed by February and November. 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 Clanwilliam in June. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

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 extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 65.4 in June means 65.4% of the tourists vs. January.



Overall Clanwilliam Travel Experience by Season

Fall (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 82.7°F (28.2°C) and 67.4°F (19.7°C) with colder temperatures in the later months. Rain is rare with 1 to 3 days of significant precipitation per month. Fall is the slowest for tourism, which makes it a good time for those looking for deals.

Winter (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with 3 to 4 days of precipitation per month. June – August is fairly slow season for tourism in Clanwilliam, so lodging and other accommodations may cost slightly less.

Spring (September through November)

Spring daily highs range from 78.3°F (25.7°C) and 69.6°F (20.9°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: approximately 1 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Summer (December through February)

Weather is perfect this time of year in Clanwilliam to be enjoyable for warm weather travelers. The average high during this season is between 81.9°F (27.7°C) and 76.1°F (24.5°C). On average, it rains or snows a very small amount: 0 to 1 times per month. These times of year are the busiest with tourists.


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