# Climate Design Data Workflow for Salt Lake City, UT

> A source-first workflow for retrieving and recording building-design climate conditions for Salt Lake City, UT without mixing climate normals, code zones, and HVAC design percentiles.

- Canonical: https://harth.build/resources/climate-data/climate-design-data-workflow-salt-lake-city-ut/
- Last updated: 2026-08-31
- Data source: Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 40.7608° N (America/Denver) 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=-111.891&latitude=40.7608&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 | 8.5 °C (2 m gridded climatology; not a design percentile) |
| Highest monthly maximum | 37.9 °C (July) (monthly climatological statistic) |
| Lowest monthly minimum | -28.2 °C (December) (monthly climatological statistic) |
| Annual relative humidity | 58.9% (2 m gridded climatology) |
| Annual corrected precipitation | 1.49 mm/day (climatological daily rate) |
| Annual wind speed | 2.50 m/s (10 m gridded climatology; not a structural design wind speed) |

## Direct answer

NASA POWER's 2001–2020 climatology at the Salt Lake City, UT reference point reports an annual mean 2 m temperature of 8.5 °C and relative humidity of 58.9%. The highest monthly maximum is 37.9 °C in July, while the lowest monthly minimum is -28.2 °C in December; 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 1.49 mm/day and annual 10 m wind speed is 2.50 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 |

## Salt Lake City, UT 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 | -4.54 | 13.08 | -26.01 | 83.57 | 1.77 | 2.30 |
| February | -2.38 | 13.66 | -27.57 | 77.67 | 1.59 | 2.62 |
| March | 2.74 | 21.40 | -18.61 | 66.86 | 1.75 | 2.81 |
| April | 6.30 | 27.08 | -10.48 | 61.40 | 2.19 | 2.83 |
| May | 11.92 | 33.03 | -4.88 | 54.84 | 1.87 | 2.49 |
| June | 18.13 | 36.03 | 1.28 | 45.11 | 1.00 | 2.56 |
| July | 23.74 | 37.90 | 7.34 | 39.08 | 0.53 | 2.35 |
| August | 22.27 | 36.90 | 4.81 | 37.69 | 0.78 | 2.44 |
| September | 16.67 | 34.17 | -2.71 | 42.32 | 1.26 | 2.48 |
| October | 8.73 | 29.27 | -12.52 | 53.23 | 1.47 | 2.42 |
| November | 1.86 | 20.48 | -24.81 | 65.49 | 1.54 | 2.38 |
| December | -4.34 | 12.74 | -28.25 | 80.92 | 2.08 | 2.35 |

![Monthly mean, maximum and minimum air temperature for Climate Design Data Workflow for Salt Lake City, UT](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-salt-lake-city-ut/chart-temperature-1344.webp)

*Monthly air temperature for Climate Design Data Workflow for Salt Lake City, UT, plotted from the table above.*

![Mean daily precipitation by month for Climate Design Data Workflow for Salt Lake City, UT](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-salt-lake-city-ut/chart-precipitation-1344.webp)

*Mean daily precipitation for Climate Design Data Workflow for Salt Lake City, UT, plotted from the table above.*

## Month-by-month climate interpretation

- **January:** mean temperature -4.54 °C is 13.02 °C below the annual mean; the monthly max–min span is 39.09 °C. Relative humidity is 83.57% (24.63 points above annual), while corrected precipitation at 1.77 mm/day is 0.28 mm/day wetter than the annual daily rate.
- **February:** mean temperature -2.38 °C is 10.86 °C below the annual mean; the monthly max–min span is 41.23 °C. Relative humidity is 77.67% (18.73 points above annual), while corrected precipitation at 1.59 mm/day is 0.10 mm/day wetter than the annual daily rate.
- **March:** mean temperature 2.74 °C is 5.74 °C below the annual mean; the monthly max–min span is 40.01 °C. Relative humidity is 66.86% (7.92 points above annual), while corrected precipitation at 1.75 mm/day is 0.26 mm/day wetter than the annual daily rate.
- **April:** mean temperature 6.30 °C is 2.18 °C below the annual mean; the monthly max–min span is 37.56 °C. Relative humidity is 61.40% (2.46 points above annual), while corrected precipitation at 2.19 mm/day is 0.70 mm/day wetter than the annual daily rate.
- **May:** mean temperature 11.92 °C is 3.44 °C above the annual mean; the monthly max–min span is 37.91 °C. Relative humidity is 54.84% (4.10 points below annual), while corrected precipitation at 1.87 mm/day is 0.38 mm/day wetter than the annual daily rate.
- **June:** mean temperature 18.13 °C is 9.65 °C above the annual mean; the monthly max–min span is 34.75 °C. Relative humidity is 45.11% (13.83 points below annual), while corrected precipitation at 1.00 mm/day is 0.49 mm/day drier than the annual daily rate.
- **July:** mean temperature 23.74 °C is 15.26 °C above the annual mean; the monthly max–min span is 30.56 °C. Relative humidity is 39.08% (19.86 points below annual), while corrected precipitation at 0.53 mm/day is 0.96 mm/day drier than the annual daily rate.
- **August:** mean temperature 22.27 °C is 13.79 °C above the annual mean; the monthly max–min span is 32.09 °C. Relative humidity is 37.69% (21.25 points below annual), while corrected precipitation at 0.78 mm/day is 0.71 mm/day drier than the annual daily rate.
- **September:** mean temperature 16.67 °C is 8.19 °C above the annual mean; the monthly max–min span is 36.88 °C. Relative humidity is 42.32% (16.62 points below annual), while corrected precipitation at 1.26 mm/day is 0.23 mm/day drier than the annual daily rate.
- **October:** mean temperature 8.73 °C is 0.25 °C above the annual mean; the monthly max–min span is 41.79 °C. Relative humidity is 53.23% (5.71 points below annual), while corrected precipitation at 1.47 mm/day is 0.02 mm/day drier than the annual daily rate.
- **November:** mean temperature 1.86 °C is 6.62 °C below the annual mean; the monthly max–min span is 45.29 °C. Relative humidity is 65.49% (6.55 points above annual), while corrected precipitation at 1.54 mm/day is 0.05 mm/day wetter than the annual daily rate.
- **December:** mean temperature -4.34 °C is 12.82 °C below the annual mean; the monthly max–min span is 40.99 °C. Relative humidity is 80.92% (21.98 points above annual), while corrected precipitation at 2.08 mm/day is 0.59 mm/day wetter than the annual daily rate.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record us:salt-lake-city-ut. 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 Boise, ID](https://harth.build/resources/climate-data/climate-design-data-workflow-boise-id.md)
- [Climate Design Data Workflow for Las Vegas, NV](https://harth.build/resources/climate-data/climate-design-data-workflow-las-vegas-nv.md)
- [Sun Path & Solar Angles for Salt Lake City, UT](https://harth.build/resources/solar-data/sun-path-and-solar-angles-salt-lake-city-ut.md)

## Sources and method

Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 40.7608° N (America/Denver) 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=-111.891&latitude=40.7608&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=-111.891&latitude=40.7608&format=JSON)

## Frequently asked questions

### What does NASA POWER climatology show for Salt Lake City, UT?

For the Salt Lake City, UT reference point, the 2001–2020 NASA POWER climatology reports 8.5 °C annual mean temperature, 58.9% relative humidity and 1.49 mm/day corrected precipitation. The monthly maximum peaks at 37.9 °C in July.

### Can the Salt Lake City, UT climatology replace project design temperatures or an hourly weather file?

No. The Salt Lake City, UT response is gridded monthly climatology; its lowest monthly minimum of -28.2 °C in December 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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