Climate Design Data Workflow for Salt Lake City, UT

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 · 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.

Salt Lake City, UT NASA POWER monthly climate screening table

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
• ASHRAE / IECC Climate Zones Explained (Zones 1–8, A/B/C)
• Heating & Cooling Design Temperatures (99%, 1% / 0.4%)
• Climate Design Data Workflow for Boise, ID
• Climate Design Data Workflow for Las Vegas, NV
• Sun Path & Solar Angles for Salt Lake City, UT

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 and exact point response, 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

• power.larc.nasa.gov