# Climate Design Data Workflow for Las Vegas, NV

> A source-first workflow for retrieving and recording building-design climate conditions for Las Vegas, NV without mixing climate normals, code zones, and HVAC design percentiles.

- Canonical: https://harth.build/resources/climate-data/climate-design-data-workflow-las-vegas-nv/
- Last updated: 2026-08-31
- Data source: Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 36.1699° N (America/Los_Angeles) are approximate routing references. Figures are illustrative — confirm the representative station and current edition. Climate screening data from the [NASA POWER Climatology API documentation](https://power.larc.nasa.gov/docs/services/api/temporal/climatology/) and [exact point response](https://power.larc.nasa.gov/api/temporal/climatology/point?parameters=T2M%2CT2M_MAX%2CT2M_MIN%2CRH2M%2CPRECTOTCORR%2CWS10M&community=SB&longitude=-115.1398&latitude=36.1699&format=JSON), retrieved 2026-08-31; source period: 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020). NASA POWER values are gridded screening statistics, not code design conditions or guaranteed local observations.

## Key facts

| Fact | Value |
| --- | --- |
| NASA POWER climatology | 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020) (API v2.9.7; LST) |
| Annual mean temperature | 19.9 °C (2 m gridded climatology; not a design percentile) |
| Highest monthly maximum | 47.6 °C (July) (monthly climatological statistic) |
| Lowest monthly minimum | -5.8 °C (January) (monthly climatological statistic) |
| Annual relative humidity | 30.6% (2 m gridded climatology) |
| Annual corrected precipitation | 0.40 mm/day (climatological daily rate) |
| Annual wind speed | 3.72 m/s (10 m gridded climatology; not a structural design wind speed) |

## Direct answer

NASA POWER's 2001–2020 climatology at the Las Vegas, NV reference point reports an annual mean 2 m temperature of 19.9 °C and relative humidity of 30.6%. The highest monthly maximum is 47.6 °C in July, while the lowest monthly minimum is -5.8 °C in January; these are screening statistics, not code design temperatures. The point response uses LST and the 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020); its annual corrected precipitation is 0.40 mm/day and annual 10 m wind speed is 3.72 m/s. Use the monthly series to screen source selection before applying project design conditions. NASA POWER is gridded climatology: verify elevation, microclimate, urban exposure, station or weather-file suitability, current code edition and the authority's required source before design use.

*Content and cited inputs reviewed by [Harth team](https://www.linkedin.com/company/harth-build) · Published 2026-08-17 · Updated 2026-08-31.*

## Which climate inputs control the design?

1. Confirm the project jurisdiction and adopted energy-code edition.
2. Select the authoritative station and record why it applies.
3. Record heating dry-bulb percentiles and cooling dry-bulb with coincident moisture conditions.
4. Keep IP/SI units, edition, observation period and retrieval date with every value.
5. Separate climate-zone envelope requirements from HVAC sizing conditions.

| Field | Required record |
| --- | --- |
| Station | Name, ID, coordinates and elevation |
| Source | Publisher, edition and licensed/public status |
| Heating | 99.6% and 99% dry-bulb |
| Cooling | 0.4%, 1% and 2% dry-bulb plus coincident wet-bulb |
| Moisture | Dew-point or humidity design condition used |
| Code | Adopted edition, amendments and effective date |

## Las Vegas, NV NASA POWER monthly climate screening table

| Month | Mean °C | Monthly max °C | Monthly min °C | RH % | Precipitation mm/day | Wind at 10 m m/s |
| --- | ---: | ---: | ---: | ---: | ---: | ---: |
| January | 7.66 | 25.97 | -5.79 | 46.18 | 0.59 | 3.63 |
| February | 9.72 | 27.34 | -5.43 | 43.02 | 0.81 | 3.63 |
| March | 14.25 | 32.97 | -3.27 | 36.54 | 0.38 | 3.89 |
| April | 18.33 | 37.36 | 1.37 | 28.79 | 0.27 | 4.34 |
| May | 24.05 | 43.71 | 5.56 | 21.73 | 0.11 | 4.21 |
| June | 30.40 | 47.02 | 11.04 | 14.39 | 0.02 | 4.25 |
| July | 33.51 | 47.62 | 19.19 | 21.97 | 0.49 | 3.56 |
| August | 32.19 | 45.58 | 15.08 | 23.70 | 0.48 | 3.40 |
| September | 27.87 | 45.48 | 9.11 | 23.16 | 0.29 | 3.37 |
| October | 20.19 | 37.72 | -0.22 | 27.98 | 0.41 | 3.47 |
| November | 12.84 | 31.08 | -4.57 | 34.74 | 0.41 | 3.47 |
| December | 7.06 | 23.69 | -5.37 | 45.61 | 0.59 | 3.47 |

![Monthly mean, maximum and minimum air temperature for Climate Design Data Workflow for Las Vegas, NV](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-las-vegas-nv/chart-temperature-1344.webp)

*Monthly air temperature for Climate Design Data Workflow for Las Vegas, NV, plotted from the table above.*

![Mean daily precipitation by month for Climate Design Data Workflow for Las Vegas, NV](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-las-vegas-nv/chart-precipitation-1344.webp)

*Mean daily precipitation for Climate Design Data Workflow for Las Vegas, NV, plotted from the table above.*

## Month-by-month climate interpretation

- **January:** mean temperature 7.66 °C is 12.23 °C below the annual mean; the monthly max–min span is 31.76 °C. Relative humidity is 46.18% (15.56 points above annual), while corrected precipitation at 0.59 mm/day is 0.19 mm/day wetter than the annual daily rate.
- **February:** mean temperature 9.72 °C is 10.17 °C below the annual mean; the monthly max–min span is 32.77 °C. Relative humidity is 43.02% (12.40 points above annual), while corrected precipitation at 0.81 mm/day is 0.41 mm/day wetter than the annual daily rate.
- **March:** mean temperature 14.25 °C is 5.64 °C below the annual mean; the monthly max–min span is 36.24 °C. Relative humidity is 36.54% (5.92 points above annual), while corrected precipitation at 0.38 mm/day is 0.02 mm/day drier than the annual daily rate.
- **April:** mean temperature 18.33 °C is 1.56 °C below the annual mean; the monthly max–min span is 35.99 °C. Relative humidity is 28.79% (1.83 points below annual), while corrected precipitation at 0.27 mm/day is 0.13 mm/day drier than the annual daily rate.
- **May:** mean temperature 24.05 °C is 4.16 °C above the annual mean; the monthly max–min span is 38.15 °C. Relative humidity is 21.73% (8.89 points below annual), while corrected precipitation at 0.11 mm/day is 0.29 mm/day drier than the annual daily rate.
- **June:** mean temperature 30.40 °C is 10.51 °C above the annual mean; the monthly max–min span is 35.98 °C. Relative humidity is 14.39% (16.23 points below annual), while corrected precipitation at 0.02 mm/day is 0.38 mm/day drier than the annual daily rate.
- **July:** mean temperature 33.51 °C is 13.62 °C above the annual mean; the monthly max–min span is 28.43 °C. Relative humidity is 21.97% (8.65 points below annual), while corrected precipitation at 0.49 mm/day is 0.09 mm/day wetter than the annual daily rate.
- **August:** mean temperature 32.19 °C is 12.30 °C above the annual mean; the monthly max–min span is 30.50 °C. Relative humidity is 23.70% (6.92 points below annual), while corrected precipitation at 0.48 mm/day is 0.08 mm/day wetter than the annual daily rate.
- **September:** mean temperature 27.87 °C is 7.98 °C above the annual mean; the monthly max–min span is 36.37 °C. Relative humidity is 23.16% (7.46 points below annual), while corrected precipitation at 0.29 mm/day is 0.11 mm/day drier than the annual daily rate.
- **October:** mean temperature 20.19 °C is 0.30 °C above the annual mean; the monthly max–min span is 37.94 °C. Relative humidity is 27.98% (2.64 points below annual), while corrected precipitation at 0.41 mm/day is 0.01 mm/day wetter than the annual daily rate.
- **November:** mean temperature 12.84 °C is 7.05 °C below the annual mean; the monthly max–min span is 35.65 °C. Relative humidity is 34.74% (4.12 points above annual), while corrected precipitation at 0.41 mm/day is 0.01 mm/day wetter than the annual daily rate.
- **December:** mean temperature 7.06 °C is 12.83 °C below the annual mean; the monthly max–min span is 29.06 °C. Relative humidity is 45.61% (14.99 points above annual), while corrected precipitation at 0.59 mm/day is 0.19 mm/day wetter than the annual daily rate.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record us:las-vegas-nv. It is a reproducible screening dataset, not an hourly weather file, forecast, code design condition or substitute for local professional review.

## Where can you explore related guidance?

- [Explore all climate data guidance](https://harth.build/resources/climate-data.md)
- [ASHRAE / IECC Climate Zones Explained (Zones 1–8, A/B/C)](https://harth.build/resources/climate-data/ashrae-climate-zones-explained.md)
- [Heating & Cooling Design Temperatures (99%, 1% / 0.4%)](https://harth.build/resources/climate-data/heating-and-cooling-design-temperatures.md)
- [Climate Design Data Workflow for Los Angeles, CA](https://harth.build/resources/climate-data/climate-design-data-workflow-los-angeles-ca.md)
- [Climate Design Data Workflow for San Diego, CA](https://harth.build/resources/climate-data/climate-design-data-workflow-san-diego-ca.md)
- [Sun Path & Solar Angles for Las Vegas, NV](https://harth.build/resources/solar-data/sun-path-and-solar-angles-las-vegas-nv.md)

## Sources and method

Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 36.1699° N (America/Los_Angeles) are approximate routing references. Figures are illustrative — confirm the representative station and current edition. Climate screening data from the [NASA POWER Climatology API documentation](https://power.larc.nasa.gov/docs/services/api/temporal/climatology/) and [exact point response](https://power.larc.nasa.gov/api/temporal/climatology/point?parameters=T2M%2CT2M_MAX%2CT2M_MIN%2CRH2M%2CPRECTOTCORR%2CWS10M&community=SB&longitude=-115.1398&latitude=36.1699&format=JSON), retrieved 2026-08-31; source period: 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020). NASA POWER values are gridded screening statistics, not code design conditions or guaranteed local observations.

### Source links

- [power.larc.nasa.gov](https://power.larc.nasa.gov/docs/services/api/temporal/climatology/)

- [power.larc.nasa.gov](https://power.larc.nasa.gov/api/temporal/climatology/point?parameters=T2M%2CT2M_MAX%2CT2M_MIN%2CRH2M%2CPRECTOTCORR%2CWS10M&community=SB&longitude=-115.1398&latitude=36.1699&format=JSON)

## Frequently asked questions

### What does NASA POWER climatology show for Las Vegas, NV?

For the Las Vegas, NV reference point, the 2001–2020 NASA POWER climatology reports 19.9 °C annual mean temperature, 30.6% relative humidity and 0.40 mm/day corrected precipitation. The monthly maximum peaks at 47.6 °C in July.

### Can the Las Vegas, NV climatology replace project design temperatures or an hourly weather file?

No. The Las Vegas, NV response is gridded monthly climatology; its lowest monthly minimum of -5.8 °C in January is not a code percentile or observed site extreme. Verify elevation, local exposure, the required weather file or design-condition source and the current adopted code.

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