Graaff-Reinet Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Graaff-Reinet’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in South Africa.

Monthly Temperature Averages

In Graaff-Reinet, seasonal changes bring about a moderate variation in temperatures. Average maximum daytime temperatures reach a very warm 30°C in January. In July, the coolest month of the year, temperatures drop to a pleasant 19°C. At night, expect even cooler temperatures, with lows averaging around 5°C.

The chart below illustrates the average maximum day and minimum night temperatures in Graaff-Reinet by month:

The lowest temperatures typically occur between 4 AM and 6 AM, while the peak temperatures are generally observed around 3 PM, when the sun's heating is most intense.

The chart below shows the average temperature throughout the year:

July, the city’s coldest month, sees about 19 mm of rainfall spread over roughly 3 days.

Annual Temperatures in South Africa Compared

The map below shows the annual temperature across South Africa. You can also select the different months in case you are interested in a specific month.

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Legend very warm warm pleasant moderate cold very cold

Very warm means maximum temperatures above 32°C. Warm: 25°C to 32°C. Pleasant: 18°C to 25°C Moderate: 10°C to 18°C. Cold: 5°C to 10°C. Very cold: lower than 5°C

Graaff-Reinet Temperatures Compared World Wide

Graaff-Reinet’s average annual maximum temperature is 25°C. Let’s compare this with some popular tourist destinations:

In Lisbon, Portugal, the average annual temperature is 21°C, offering warm summers and mild, rainy winters.

Meanwhile, Queenstown, New Zealand, the average annual temperature is significantly lower at 10°C, with mild summers and cold winters.

The climate in San Francisco, USA, is mild, with an average annual temperature of 19°C and minimal seasonal variation.

In Tokyo, Japan, the average annual temperature is 21°C, expect warmer summers and milder winters.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.

Sea vs. Land Temperatures

The influence of nearby oceans or large water bodies significantly affects local temperatures:

• Ocean Influence: Coastal regions tend to have more stable temperatures, as large bodies of water absorb and release heat slowly. This often results in milder winters and cooler summers compared to inland areas.
• Continental Climates: Landmasses well away from large bodies of water tend to show greater extremes in temperature, having hotter summers and colder winters because of the absence of water as a moderating influence.

For more detailed information about Graaff-Reinet’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Graaff-Reinet climate page.