UAG · 13% of the exam
Weather practice questions
10 free Weather questions for the Remote Pilot – Small UAS (Part 107) Knowledge Test (UAG) exam, each with the correct answer and an explanation for every option.
What this domain covers
Weather sources and effects on small UAS operations.
- Exam weight
- 13%
- On a real exam
- ≈ 8 questions
- In our bank
- 80 questions
Topics that come up most
- METAR and TAF reports
- Density altitude
- Wind, turbulence and thunderstorms
- Fog and stability
- Weather briefing sources
How to study it
Decode METARs and TAFs until it's fast; reading a report is a reliable source of marks.
Sample Weather questions
Try each one before opening the answer. Original questions written to the official exam objectives.
Question 1
A Winds and Temperatures Aloft Forecast provides:
- AForecast wind and temperature at various altitudes
- BCurrent surface observations from airports along the route
- CThunderstorm warnings
- DAirport closures
Show answer and explanation
Answer: A) Forecast wind and temperature at various altitudes
- ACorrect. Lower altitudes may be omitted near the station.
- BIncorrect. That's a METAR.
- CIncorrect. That's a convective SIGMET.
- DIncorrect. That's a NOTAM.
Question 2
Before an early-morning sUAS flight, a remote pilot sees that the reported temperature and dew point differ by only 1°C and the spread is shrinking. Which condition should the pilot expect?
- AFog or low clouds forming that reduce visibility
- BRising cloud bases and improving visibility
- CGusty surface winds with blowing dust
- DBetter aircraft performance from denser, moist air
Show answer and explanation
Answer: A) Fog or low clouds forming that reduce visibility
When the temperature and dew point are close and converging, the air is near saturation. Fog or low clouds are likely, and visibility may drop.
- ACorrect. A small, shrinking temperature/dew point spread means the air is close to saturation. Further cooling condenses water vapor into fog or low clouds, which can drop visibility below Part 107 minimums.
- BIncorrect. Cloud bases tend to be higher when the spread is large. A small, shrinking spread points to lower bases and worsening visibility.
- CIncorrect. Blowing dust goes with dry, windy conditions. A narrow spread shows moist, nearly saturated air.
- DIncorrect. Moist air is less dense than dry air at the same temperature and pressure, so performance gets worse, not better. The main concern with a small spread is fog or low clouds.
Question 3
A small UA is left outdoors overnight. Under which condition will frost form on its surfaces?
- AThe surface cools to or below the dew point of the adjacent air, and the dew point is below freezing
- BDew collects on the surface while above freezing, and those liquid droplets later freeze in place
- CThe air temperature drops below freezing while the surface stays warmer than the dew point
- DSupercooled drizzle falls onto a surface whose temperature is slightly above freezing
Show answer and explanation
Answer: A) The surface cools to or below the dew point of the adjacent air, and the dew point is below freezing
Frost forms when the collecting surface is at or below the dew point of the adjacent air and that dew point is below freezing. Water vapor then sublimates directly into ice crystals.
- ACorrect. Frost forms when the collecting surface is at or below the dew point of the adjacent air and that dew point is below freezing. Water vapor then turns directly into ice crystals (sublimation) without first becoming liquid.
- BIncorrect. Dew that freezes after it forms is frozen dew, which is hard and clear. Frost is a white, crystalline deposit that forms directly from water vapor.
- CIncorrect. If the surface stays warmer than the dew point, water vapor will not deposit on it, so no frost forms however cold the air is.
- DIncorrect. Drizzle landing on a surface above freezing stays liquid. Frost does not form from falling precipitation; it forms by sublimation directly onto a cold surface.
Question 4
The temperature is 75°F and the dew point is 53°F. About where are the cloud bases?
- A2,200 feet AGL
- B5,000 feet AGL
- C22,000 feet AGL
- D500 feet AGL
Show answer and explanation
Answer: B) 5,000 feet AGL
- AIncorrect. This uses the spread times 100.
- BCorrect. Spread 22°F ÷ 4.4 × 1,000 ≈ 5,000 feet AGL.
- CIncorrect. This uses the spread times 1,000.
- DIncorrect. This is far too low.
Question 5
A METAR includes "OVC010." What does it mean?
- AWind at 10 knots
- BOvercast at 100 ft AGL
- CVisibility 10 miles
- DOvercast at 1,000 ft AGL
Show answer and explanation
Answer: D) Overcast at 1,000 ft AGL
- AIncorrect. This is a cloud group.
- BIncorrect. Heights are in hundreds of feet.
- CIncorrect. This is a cloud group.
- DCorrect. OVC is overcast, and 010 means 1,000 feet AGL.
Question 6
An AIRMET Sierra warns of:
- AVolcanic ash
- BModerate turbulence and strong surface winds
- CIcing
- DIFR conditions and mountain obscuration
Show answer and explanation
Answer: D) IFR conditions and mountain obscuration
- AIncorrect. That's a SIGMET.
- BIncorrect. That's AIRMET Tango.
- CIncorrect. That's AIRMET Zulu.
- DCorrect. Tango is turbulence and Zulu is icing.
Question 7
A METAR for an airport near your planned sUAS operation reports a temperature/dew point of 14/12. Which statement correctly describes the dew point value in that report?
- AThe temperature to which the air must be cooled to become saturated
- BThe ratio of water vapor present to the maximum the air could hold
- CThe number of degrees between the air temperature and saturation
- DThe lowest surface temperature forecast for the coming night
Show answer and explanation
Answer: A) The temperature to which the air must be cooled to become saturated
The dew point is the temperature to which air must be cooled to become saturated. When the temperature and dew point are close together, expect fog or low clouds that can reduce visibility for sUAS operations.
- ACorrect. The dew point is the temperature at which the air can hold no more moisture. Once the air cools to it, water vapor condenses as fog, dew, frost, clouds or precipitation.
- BIncorrect. That ratio is relative humidity. Relative humidity is related to the dew point, but it is a percentage, not a temperature.
- CIncorrect. That is the temperature/dew point spread, which here is 2 °C. A small spread warns of possible fog or low clouds, but the spread is not the dew point itself.
- DIncorrect. A METAR reports observed conditions, not forecasts. The dew point measures the moisture in the air, not an expected overnight low.
Question 8
What kind of report is a METAR?
- AA current observation
- BA forecast for the next 24 hours or more
- CA flight restriction
- DA pilot report
Show answer and explanation
Answer: A) A current observation
- ACorrect. A METAR reports current surface weather at an airport.
- BIncorrect. That is a TAF.
- CIncorrect. That is a NOTAM or TFR.
- DIncorrect. That is a PIREP.
Question 9
'AUTO' in a METAR means the report came from:
- AA fully automated station
- BAn automobile
- CA pilot report relayed by ATC
- DA forecast
Show answer and explanation
Answer: A) A fully automated station
- ACorrect. Some elements may be limited.
- BIncorrect. It's an automated station.
- CIncorrect. That's a PIREP.
- DIncorrect. It's an observation.
Question 10
A remote pilot checking the graphical AIRMETs (G-AIRMETs) for the operating area sees an AIRMET Zulu. Which hazard does AIRMET Zulu address?
- ACeilings below 1,000 feet and/or visibility below 3 miles, and mountain obscuration
- BModerate turbulence and sustained surface winds of 30 knots or more
- CModerate icing, along with information on freezing-level heights
- DEmbedded thunderstorms, lines of thunderstorms, and tornadoes
Show answer and explanation
Answer: C) Moderate icing, along with information on freezing-level heights
AIRMETs, including the graphical G-AIRMETs, are grouped as Sierra (IFR conditions and mountain obscuration), Tango (turbulence, strong surface winds and low-level wind shear) and Zulu (moderate icing and freezing levels).
- AIncorrect. IFR conditions and extensive mountain obscuration are covered by AIRMET Sierra.
- BIncorrect. Moderate turbulence, strong sustained surface winds and low-level wind shear are covered by AIRMET Tango.
- CCorrect. AIRMET Zulu describes moderate icing and gives freezing-level heights.
- DIncorrect. Thunderstorm hazards like these are covered by a Convective SIGMET, not an AIRMET.
Weather: FAQs
How much of the UAG exam is Weather?
Weather is 13% of the UAG exam by the official exam guide's weighting, which on a 60-question form works out to roughly 8 questions. The real exam's exact split varies by form.
What does the Weather domain cover?
Weather sources and effects on small UAS operations.
How should I study Weather for UAG?
Decode METARs and TAFs until it's fast; reading a report is a reliable source of marks.
Where can I practise more Weather questions?
This page has 10 free Weather questions with answers. The ExamWize UAG question bank has 80 questions in this domain. Every practice exam result breaks your score down by domain, and Review Mode re-drills the questions you missed.
Get Weather exam-ready
The full UAG bank has 80 Weather questions. Timed practice exams match the real exam's length and domain weights, every result shows your score per domain, and Review Mode re-drills the questions you missed.
Not affiliated with FAA; questions are original, written from the official exam outline, and never copied from the real exam.