Climate Design Data Workflow for New York, NY

Direct answer

NASA POWER's 2001–2020 climatology at the New York, NY reference point reports an annual mean 2 m temperature of 12.3 °C and relative humidity of 80.5%. The highest monthly maximum is 34.2 °C in July, while the lowest monthly minimum is -14.4 °C in February; 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 3.59 mm/day and annual 10 m wind speed is 5.31 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.

New York, NY NASA POWER monthly climate screening table

Month-by-month climate interpretation

• January: mean temperature 1.06 °C is 11.20 °C below the annual mean; the monthly max–min span is 29.33 °C. Relative humidity is 82.20% (1.75 points above annual), while corrected precipitation at 3.20 mm/day is 0.39 mm/day drier than the annual daily rate.
• February: mean temperature 1.41 °C is 10.85 °C below the annual mean; the monthly max–min span is 28.77 °C. Relative humidity is 80.84% (0.39 points above annual), while corrected precipitation at 3.37 mm/day is 0.22 mm/day drier than the annual daily rate.
• March: mean temperature 4.17 °C is 8.09 °C below the annual mean; the monthly max–min span is 27.75 °C. Relative humidity is 80.69% (0.24 points above annual), while corrected precipitation at 3.66 mm/day is 0.07 mm/day wetter than the annual daily rate.
• April: mean temperature 9.05 °C is 3.21 °C below the annual mean; the monthly max–min span is 27.07 °C. Relative humidity is 81.60% (1.15 points above annual), while corrected precipitation at 3.56 mm/day is 0.03 mm/day drier than the annual daily rate.
• May: mean temperature 14.28 °C is 2.02 °C above the annual mean; the monthly max–min span is 24.11 °C. Relative humidity is 83.80% (3.35 points above annual), while corrected precipitation at 3.25 mm/day is 0.34 mm/day drier than the annual daily rate.
• June: mean temperature 19.87 °C is 7.61 °C above the annual mean; the monthly max–min span is 21.03 °C. Relative humidity is 82.93% (2.48 points above annual), while corrected precipitation at 3.82 mm/day is 0.23 mm/day wetter than the annual daily rate.
• July: mean temperature 23.71 °C is 11.45 °C above the annual mean; the monthly max–min span is 19.49 °C. Relative humidity is 79.50% (0.95 points below annual), while corrected precipitation at 3.67 mm/day is 0.08 mm/day wetter than the annual daily rate.
• August: mean temperature 23.69 °C is 11.43 °C above the annual mean; the monthly max–min span is 16.65 °C. Relative humidity is 77.67% (2.78 points below annual), while corrected precipitation at 3.67 mm/day is 0.08 mm/day wetter than the annual daily rate.
• September: mean temperature 20.60 °C is 8.34 °C above the annual mean; the monthly max–min span is 19.52 °C. Relative humidity is 77.21% (3.24 points below annual), while corrected precipitation at 3.22 mm/day is 0.37 mm/day drier than the annual daily rate.
• October: mean temperature 14.92 °C is 2.66 °C above the annual mean; the monthly max–min span is 25.80 °C. Relative humidity is 77.88% (2.57 points below annual), while corrected precipitation at 3.99 mm/day is 0.40 mm/day wetter than the annual daily rate.
• November: mean temperature 9.25 °C is 3.01 °C below the annual mean; the monthly max–min span is 24.89 °C. Relative humidity is 79.40% (1.05 points below annual), while corrected precipitation at 3.37 mm/day is 0.22 mm/day drier than the annual daily rate.
• December: mean temperature 4.50 °C is 7.76 °C below the annual mean; the monthly max–min span is 28.54 °C. Relative humidity is 81.76% (1.31 points above annual), while corrected precipitation at 4.28 mm/day is 0.69 mm/day wetter than the annual daily rate.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record us:new-york-ny. 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 Boston, MA
• Climate Design Data Workflow for Washington, DC
• Sun Path & Solar Angles for New York, NY

Sources and method

Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 40.7128° N (America/New_York) 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