Physical geography · GCSE Geography
Climate graphs
GCSE Geography climate graphs: reading temperature and precipitation, identifying equatorial, hot desert, Mediterranean and UK temperate patterns, and describing climate not weather.
Bars for rain, line for temperature — describe the pattern, name the biome, land a place.
The important bits
What you need to know
- 1
A climate graph plots monthly mean temperature (°C, usually a line) and precipitation (mm, usually bars) for a location. It shows long-term average climate, not one week’s weather.
- 2
Read the axes: temperature scale, precipitation scale, months labelled. Compare wettest and driest months, warmest and coldest, and the annual range.
- 3
Equatorial (e.g. Amazonia): high temperature all year (26–28°C), heavy rainfall every month, small seasonal temperature range. Supports tropical rainforest.
- 4
Hot desert (e.g. Sahara, Atacama): high temperatures, very low rainfall, often a slight winter rain peak or almost none. Supports desert biome.
- 5
Mediterranean: hot dry summers, mild wet winters — precipitation bars low in summer, temperature peak in July/August. Supports maquis/chaparral.
- 6
Temperate maritime (UK): mild winters, cool summers, precipitation throughout the year with a slight winter maximum — no extreme dry season.
- 7
Monsoon: very wet summer season, drier winter — huge precipitation range between months (e.g. Mumbai).
- 8
Link graph to biome and human activity: farming calendars, tourism seasons, water stress. “Describe the climate” means pattern + data reference + consequence.
Quotations worth analysing
Short evidence. Real method.
“Climate is the long-term average of weather.”
A cold week does not disprove a warming trend; one graph is a 30-year average, not Tuesday’s forecast.
Go deeper
How to describe a graph in four sentences
Sentence 1: overall temperature — hot all year, or seasonal swing. Sentence 2: precipitation pattern — constant, summer dry, winter wet, monsoon peak. Sentence 3: quote two months with figures if the axis allows. Sentence 4: biome or human link — rainforest, desert agriculture, UK farming year-round rain. Examiners punish “it rains a lot” without months or amounts.
Go deeper
Common graph traps
Mixing up scales: 100 mm rain is not the same visual as 30°C. Calling UK climate “dry in summer” when bars are still present — Mediterranean is the dry-summer type, not Britain. Forgetting southern-hemisphere seasons if a graph shows July cold. Always check hemisphere if latitude is given.
See the idea in action
Graph shows Mediterranean climate: temperatures peak at 28°C in July/August; precipitation falls to near zero in summer months, rising to 80 mm in winter. Pattern: hot dry summers, mild wet winters. Biome: maquis. Human: summer tourism, winter cropping, water stress in August.
Exam technique
Turn knowledge into marks
Practise one equatorial, one desert, one Mediterranean and UK graphs until you can name the pattern in thirty seconds.
Common mistakes
Do not give these marks away
- 01
Confusing climate graphs with weather forecasts.
- 02
Describing one month as the whole climate.
- 03
Mixing Mediterranean dry summers with UK year-round rain.
Which climate graph pattern has hot dry summers and mild wet winters?
AMediterranean
BEquatorial
CHot desert
DPolar
Show the answer
Mediterranean. Mediterranean climates show low summer precipitation bars and a temperature peak in summer. Equatorial is wet year-round; deserts are dry year-round.
Quick questions
If this is the bit you searched
What goes on each axis?
Typically months on the x-axis, temperature (line, °C) and precipitation (bars, mm) on the y-axes — sometimes dual y-axes. Check the key every time.
How is climate different from weather?
Weather is short-term conditions; climate is the long-term average, often 30 years, shown on a climate graph.