MetarTaf Decoder

METAR and TAF in plain English, in seconds

Vance Brand Airport (Longmont) (KLMO)

United States · elevation 5055 ft AMSL · 40.1637, -105.1630 · Local time: --:--:-- · UTC time: --:--:--

About Vance Brand Airport (Longmont)

Vance Brand Airport (Longmont) is an airport with the ICAO code KLMO. Country: United States. Nearest settlement listed in the database: Longmont. OurAirports classifies it as a small airport. Its ICAO code starts with the KL prefix, which marks airports in United States. No IATA code is assigned, which is typical for airports without scheduled traffic. The airport reference point sits at 40°09'49"N, 105°09'47"W, at an elevation of 5,055 ft (1,541 m) above sea level. The applicable time zone is America/Denver.

Satellite view of KLMO

Aerial imagery showing the runway and apron layout - the zoom is matched to the longest runway.

Open the satellite view in Google Maps

Runways of KLMO

ThresholdCourseLengthWidthSurface
11110°1,463 m (4,799 ft)23 m (75 ft)asphalt
29290°

The course is derived from the runway designator (number × 10), not from a survey - the actual magnetic bearing can differ by a few degrees.

Declared distances (TORA, TODA, ASDA, LDA) are published in the national AIP - they are not part of this table.

Climate at Vance Brand Airport (Longmont) - statistics from METAR reports

What the METAR reports from KLMO for 2023-2025 show - counted hour by hour.

We computed these statistics from 24,966 METAR reports issued by KLMO in 2023-2025. VFR conditions prevailed 89% of the time, MVFR 8% and IFR or LIFR 3%. Best month for VFR flying: December (94% of hours VFR). Most IFR and LIFR hours: January (9%).

Through the day, IFR or LIFR conditions are most frequent around 13:00 UTC (6% of reports at that hour) and least frequent around 01:00 UTC (2%).

Fog (FG) was reported on 5.1 days a year on average, most often in January. Thunderstorms (TS) occurred on 0 days a year on average, and snowfall on 34.

The wind most often blows from W (270°) - 9% of reports. Calm (0 kt) made up 37% of reports, and gusts of 25 kt or more appeared in 2%. Warmest month: July (average high 33.7 °C); coldest: January (average low -8.4 °C).

Year

Selected period in numbers: 2023-2025

VFR hours
89%
IFR/LIFR hours
3%
Avg high
20.9 °C
Avg low
4.4 °C
Fog days
5.1
Thunderstorm days
0
Snow days
34
Prevailing wind
W · 9%
Gusts ≥ 25 kt
2%

Day counts are for the selected period (for all years - the yearly average).

Flight categories month by month
Bar chart: share of VFR, MVFR, IFR and LIFR hours in each month0%25%50%75%100%January: VFR 83%, MVFR 9%, IFR 6%, LIFR 3%JanFebruary: VFR 85%, MVFR 8%, IFR 4%, LIFR 2%FebMarch: VFR 87%, MVFR 7%, IFR 4%, LIFR 2%MarApril: VFR 85%, MVFR 10%, IFR 4%, LIFR 1%AprMay: VFR 89%, MVFR 9%, IFR 2%, LIFR <1%MayJune: VFR 93%, MVFR 5%, IFR 1%, LIFR <1%JunJuly: VFR 92%, MVFR 6%, IFR 1%, LIFR 1%JulAugust: VFR 92%, MVFR 7%, IFR 1%, LIFR <1%AugSeptember: VFR 93%, MVFR 7%, IFR <1%, LIFR 0%SeptOctober: VFR 86%, MVFR 11%, IFR 1%, LIFR 1%OctNovember: VFR 90%, MVFR 7%, IFR 3%, LIFR 1%NovDecember: VFR 94%, MVFR 5%, IFR 1%, LIFR <1%Dec
  • VFR 89%
  • MVFR 8%
  • IFR 2%
  • LIFR 1%
Temperature month by month
Chart: average daily high and low temperature in each month−10°0°10°20°30°January: -8.4 … 5.8 °C6−8JanFebruary: -4.6 … 10.9 °C11−5FebMarch: -0.9 … 14.8 °C15−1MarApril: 3.2 … 19.9 °C203AprMay: 7.9 … 23.6 °C248MayJune: 13.0 … 29.5 °C3013JunJuly: 15.4 … 33.7 °C3415JulAugust: 15.0 … 32.5 °C3315AugSeptember: 10.8 … 29.3 °C2911SeptOctober: 4.7 … 22.1 °C225OctNovember: -1.4 … 15.2 °C15−1NovDecember: -2.9 … 12.7 °C13−3Dec

The top of each bar is the average daily high, the bottom the average daily low (usually around dawn), in °C.

Wind rose: how often the wind blows from each of 16 directions5%10%N: 6%NNE: 4%NE: 3%ENE: 4%E: 6%ESE: 3%SE: 2%SSE: 2%S: 3%SSW: 2%SW: 3%WSW: 5%W: 9%WNW: 5%NW: 3%NNW: 3%NNNENEENEEESESESSESSSWSWWSWWWNWNWNNWW 9%

Wind rose

  • 1-10 kt
  • 11-20 kt
  • over 20 kt
  • calm: 37%

Most often: W - 9% of reports. Each petal shows the direction the wind blows from (as in METAR) - the longer it is, the more often. Colour shows wind speed.

Month by month

MonthAvg high °CAvg low °CVFRIFR/LIFRFog daysThunderstorm daysSnow days
January5.8-8.483%9%208.7
February10.9-4.685%6%1.707.3
March14.8-0.987%6%0.705
April19.93.285%5%005.3
May23.67.989%2%000
June29.513.093%1%0.400
July33.715.492%2%000
August32.515.092%1%000.3
September29.310.893%<1%000
October22.14.786%2%0.302
November15.2-1.490%3%003.6
December12.7-2.994%1%001.6

Temperatures are averages of daily highs and lows. Day counts are the average per month over the period.

More in the METAR Academy: VFR, MVFR, IFR, LIFR flight categories, fog in METAR

Source: routine METAR reports from the Iowa Environmental Mesonet archive (Iowa State University), 2023-2025. Flight categories use the FAA thresholds, widely used as a convention. A day counts when it has at least 12 reports. These are statistics of past conditions - not a forecast or a substitute for a pre-flight briefing.

Runways at KLMO

According to OurAirports data (compiled from AIP and FAA sources), Vance Brand Airport (Longmont) has one runway: 11/29 - 1,463 m long (4,799 ft), 23 m wide, asphalt surface.

Runway headings and wind

The thresholds are oriented as follows: 11/29 on 110° and 290° magnetic. A threshold designator is its magnetic heading divided by ten (ICAO Annex 14), so the runway axis can be read straight off the numbers.

For the 11/29 axis, wind from the south (around 200°) or from the north (around 20°) blows perpendicular to the runway and produces the largest crosswind component. Wind from around 110° or 290° acts along the runway, as a headwind or a tailwind. The decoder on this page computes those components automatically from the current METAR.

METAR and TAF for KLMO

Weather reports for Vance Brand Airport (Longmont) are published under the ICAO code KLMO. A METAR is an observation of current conditions, usually issued every 30 or 60 minutes; a TAF is a forecast for the airport area, typically covering 9 to 30 hours.

The decoder breaks the KLMO report down into its parts: wind direction and speed including gusts and variability, visibility (including CAVOK and directional minimum visibility), weather phenomena by WMO code, cloud layers with their bases, temperature and dew point, QNH pressure, and the resulting flight category - VFR, MVFR, IFR or LIFR - using FAA thresholds.

Not every airport issues its own reports; many smaller airfields have no weather station. If no current data is available for KLMO, check the nearby airports listed below.

Reports always use UTC (the Z suffix). The America/Denver zone is GMT-07:00 in winter and GMT-06:00 in summer - that is the shift to apply to the time in the report to get local time at the airport.

The closest airports in the database, measured in a straight line from the reference point, are Boulder Municipal Airport (KBDU, 15 km), Erie Municipal Airport (KEIK, 20 km), Rocky Mountain Metropolitan Airport (Denver) (KBJC, 29 km). When no report is available for KLMO, they usually give the best approximation of conditions in the area.

METAR Academy

Something unclear in the KLMO report?

Step-by-step guides - with examples, charts and calculators.

How to read a METARHow to read a TAFVFR/IFR flight categoriesAll guides →

Advertisement

ICAO4U

Pass your ICAO Aviation English exam - 100% online

ICAO Level 4, 5 or 6 for PPL(A)/CPL(A)/ATPL(A): aviation vocabulary, radio phraseology, pronunciation and standard/emergency flight scenarios. Buy through this link and get a 10% discount.

Check ICAO4U

Advertisement

VFR Map Europe

VFR Map Europe - your aeronautical chart in the cockpit

Moving GPS map, airspace and zones, airspace alerts and offline use. Plan your VFR route online for free and send it to the app. The online map is free.

Check VFR Map

Nearby airports

Looking for a report from a specific day?

The METAR archive for KLMO goes back to 18/04/2011. Pick a date and see every observation from that day.

Open METAR history →

Live weather from KLMO on your website

Run a flying club, a training organisation or an airfield website? Embed a ready-made panel with the current KLMO METAR - flight category, wind, visibility, temperature and pressure, refreshed automatically. The configurator lets you pick language, theme and units; you paste the code once.

Configure the widget Free, no account and no display limit.