Weather and climate is the part of IGCSE Geography where you read data, calculate simple values and explain how rain forms. The skills are practical: take a graph or table, extract exact figures, and write a short, supported explanation.
Nothing here needs advanced maths. You need comfortable subtraction with negative numbers, a mean, and a habit of reading axes before reading anything else. Check the current Cambridge syllabus page, linked below this article, for the content list that applies to your exam year.
What should you already know?
You should be able to read a bar chart and a line graph, work with a scale, and calculate a mean from a short list. Basic map skills help too, since the places in questions are located on maps. If scales and gradients feel shaky, the map scale and gradient practice tool is a gentle warm-up.
One orienting example
The data below is invented for teaching and does not describe a real town.
| Month | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Mean temperature (°C) | 4 | 5 | 8 | 11 | 15 | 18 |
| Rainfall (mm) | 60 | 50 | 45 | 50 | 55 | 60 |
The coolest month here is January at 4 °C and the warmest is June at 18 °C, so the temperature range across these six months is 18 − 4 = 14 °C. Total rainfall is 60 + 50 + 45 + 50 + 55 + 60 = 320 mm. March is the driest month with 45 mm.
Those three moves, find the extremes, subtract, and add up, cover most of what a data question asks. The lessons below build each one properly.
In what order should you study the lessons?
- Read a climate graph correctly: start here, because every other lesson uses graphs and tables.
- Calculate a temperature range: turns readings into one comparable number.
- Explain a rainfall mechanism with a diagram: the main explanation skill, built on cooling and condensation.
- Interpret weather observations with instrument limits: shows why a reading may not match the real conditions.
- Distinguish a weather event from a climatic pattern: the idea that ties the earlier lessons together.
Finish with the weather and climate practice set. The statistics and distribution explorer lets you try means and ranges on your own numbers.
Which traps catch students most?
- Reading temperature against the rainfall axis, or the reverse, because a climate graph has two scales.
- Quoting a figure without its unit, or without the month it belongs to.
- Writing “hot air rises so it rains” without saying that the air cools, and that water vapour condenses.
- Treating one unusual year as proof of a climate.
How should you use the practice set?
Attempt each question on paper first, then open the worked answer and compare method, not just the final number. The practice page links every kind of error back to the lesson that fixes it. Keep a short list of the slips you repeat; the mistake log and retest queue is built for this.
When a topic still feels uncertain after practice, online one-to-one Geography tuition gives you a teacher who works through your own answers. Return to the Geography learning guide to see how this module sits among the others.