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.
- Pass mark
- 75%
- Exam questions
- ~20
- Subject code
- P30
What this subject asks of you
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.
The pass mark
75% in every PPL theory subject. Paper length varies by country; confirm the format with your exam authority.Best next step
Answer the worked example below before reading the study moves. A question you have tried tells you what to read for.
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
Not quite. The correct answer is A.
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.
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.
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.
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.
Frequently asked questions
Why is PPL Meteorology such a large subject?
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?
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?
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?
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?
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.
The nine PPL theory subjects
The nine PPL theory subjects
Try the free PPL quiz
Test yourself on Meteorology and the other PPL theory subjects with a free practice quiz, no account needed.
Turn Meteorology revision into a habit.
The SkyStudy ATPL question bank is built for the ATPL theory phase that follows the PPL: practice questions across every subject, spaced repetition, and timed mock exams aligned to the published EASA ATPL learning objectives. Free to start, no card needed.