P30 PPL theory subject

PPL Meteorology: the exam guide

PPL Meteorology takes you from the basic structure of the atmosphere through to reading real weather reports, and it is one of the broader PPL subjects in terms of raw content. It covers pressure and temperature behaviour, humidity and cloud formation, air masses and fronts, the weather systems that produce icing, turbulence, and thunderstorms, and finally the coded reports (METAR, TAF, SIGMET) that turn all of that theory into something you use before every flight. The volume is real, but the ideas link together as cause and effect once you see the pattern.

Pass mark

75%

Exam questions

Typically around 20 questions in most EASA states (paper length varies by country)

Subject code

P30

Why Meteorology matters

Weather is the variable a private pilot cannot control and must plan around on every flight. Understanding why fog forms on a calm, clear night, why a cold front brings a short, sharp change rather than a slow one, and why icing risk increases in specific temperature and moisture combinations gives you the judgement to make a genuinely informed go or no-go decision, not just a guess based on how the sky looks from the ground.

Key topics

Vertical structure of the atmosphere and standard temperature and pressure definitions
Lapse rates, stability, heat transfer, and temperature inversions
Atmospheric pressure, isobars, and altimetry settings and calculations
Wind, the pressure gradient, Coriolis force, and the effect of surface friction
Humidity, dew point, and the changes of state that release or absorb latent heat
Cloud formation and classification, and the role of temperature inversions
Fog and mist: radiation fog, advection fog, and orographic fog
Precipitation types and the cloud types associated with them
Air masses, fronts, and the structure and weather of warm, cold, and occluded fronts
Anticyclones, non-frontal depressions, and typical mid-latitude weather patterns
Icing: conditions, types, hazards, and avoidance
Turbulence, wind shear, and thunderstorm development, structure, and hazards
Reading METAR, SPECI, and TAF reports, plus SIGMET and AIRMET warnings

How to study it

Study weather as a cause-and-effect chain: start from a physical driver such as heating or moisture, and follow it through to the cloud, precipitation, or hazard it produces.
Practise decoding real METARs and TAFs from the start of your revision rather than leaving it until the end, so the report language becomes familiar alongside the theory.
Build one clear picture of frontal weather (warm front, cold front, occlusion) with the cloud sequence, wind change, and pressure trend for each, since this single diagram answers a large share of frontal questions.
Revisit the high-volume topics (fronts, icing, cloud formation) repeatedly across your revision schedule instead of trying to finish the subject in a single pass.
Link icing and turbulence topics directly to flight planning decisions: ask what a pilot would actually do differently given each hazard, not just what the hazard is called.
Keep a short glossary of terms that look similar (visibility versus RVR, SIGMET versus AIRMET) and test yourself on the distinction regularly.

Common traps

Learning cloud names and precipitation types without understanding the conditions that actually produce them.
Confusing warm front weather with cold front weather, particularly the difference in cloud sequence, precipitation duration, and wind shift.
Leaving METAR and TAF decoding until late revision, then losing confidence under time pressure on questions that are really just reading comprehension.
Treating icing as a single hazard rather than distinguishing the conditions and altitudes where structural, carburettor, and airframe icing each become significant.
Mixing up SIGMET and AIRMET purposes, or forgetting which hazards each is meant to warn about.
Assuming stable air always means calm conditions, when stability and turbulence are affected by separate factors including terrain and wind shear.

Worked example question

An independently authored revision question in the same multiple-choice format as the exam. Try it before opening the answer.

Worked example: ISA temperature at altitude

Using the International Standard Atmosphere (ISA), where sea level temperature is 15°C and temperature falls at approximately 2°C per 1,000 ft up to the tropopause, what is the ISA temperature at 8,000 ft?

A-1°C
B+1°C
C-16°C
D-31°C

Show the answer and walkthrough

Correct answer: A

A. Correct. 8,000 ft is 8 steps of 1,000 ft, so the temperature falls by approximately 16°C from the 15°C sea level value: 15 minus 16 equals -1°C.
B. This would result from a sign error when subtracting the lapse rate from the sea level temperature.
C. This is the total temperature drop from sea level, not the resulting temperature at altitude; it omits adding back the 15°C starting point.
D. This applies the lapse rate as if it were roughly double the ISA rate, which does not match the standard 2°C per 1,000 ft approximation used in PPL-level calculations.

Step by step

Start from the ISA sea level reference: 15°C.
Calculate the number of 1,000 ft increments to 8,000 ft: 8 increments.
Apply the standard lapse rate of approximately 2°C per 1,000 ft: 8 multiplied by 2 equals 16°C of cooling.
Subtract the cooling from the sea level temperature: 15°C minus 16°C equals -1°C.

Frequently asked questions

Why is PPL Meteorology such a large subject?

Because it has to cover both the underlying physics of the atmosphere and its practical, operational output. You need to understand why weather systems behave the way they do, and you also need to be able to read the coded reports and forecasts that summarise that behaviour before every flight. Repetition and connecting theory to real reports is what compresses that volume into something manageable.

How do I get better at decoding METARs and TAFs?

Practise on live, real reports rather than only textbook examples, because real weather includes the full range of formatting you will actually see. Decode a handful of current reports regularly through your revision, and check your reading against a decoder or your instructor until the abbreviations stop requiring conscious translation.

What is the difference between SIGMET and AIRMET?

Both are meteorological warnings issued for hazardous weather, but they are scaled differently: SIGMETs warn of phenomena that are hazardous to all aircraft, such as severe icing, severe turbulence, or thunderstorms, while AIRMETs (where issued) tend to cover conditions that are more specifically hazardous to lower-performance aircraft operating at lower levels. Your ATO's local briefing materials will confirm which service is used in your training area.

Why does temperature and dew point spread matter?

The spread between air temperature and dew point tells you how close the air is to saturation. A narrow and closing spread, particularly overnight with light wind and clear skies, is the classic setup for radiation fog. Recognising that pattern from a forecast or a trend in observed reports is a genuinely practical skill examiners expect you to apply, not just define.

Is PPL Meteorology different from ATPL Meteorology?

The core physics is the same, but ATPL Meteorology goes considerably further into global circulation, high-level weather relevant to jet operations, and more detailed forecast products. PPL Meteorology focuses on what a private pilot flying light aircraft under visual flight rules actually needs to plan and fly safely, which makes it the right first exposure to the subject before the ATPL depth.

Related PPL guides

Subjects that overlap with Meteorology, revise them together to reinforce the shared concepts.

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P20

Human Performance

Study PPL Human Performance with a guide to hypoxia, vision, spatial disorientation, fatigue, alcohol limits, decision-making, and exam-ready recall.

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Try the free PPL quiz

Test yourself on Meteorology and the other PPL theory subjects with a free practice quiz, no account needed.

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Turn Meteorology revision into a habit.

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This page is general educational information for student pilots and may be out of date. Aviation rules, training requirements, costs, medical standards, and exam details change over time and vary by country, authority, and training organisation, so details here may no longer be current or may differ in your case. Always confirm the current details with your approved training organisation (ATO) and national aviation authority before relying on them. SkyStudy is an independent study aid, is not affiliated with EASA or any aviation authority, and does not guarantee any exam or licence outcome.

Last reviewed July 2026