# Climate Design Data Workflow for New York, NY

> A source-first workflow for retrieving and recording building-design climate conditions for New York, NY without mixing climate normals, code zones, and HVAC design percentiles.

- Canonical: https://harth.build/resources/climate-data/climate-design-data-workflow-new-york-ny/
- Last updated: 2026-08-31
- Data source: 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](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=-74.006&latitude=40.7128&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 | 12.3 °C (2 m gridded climatology; not a design percentile) |
| Highest monthly maximum | 34.2 °C (July) (monthly climatological statistic) |
| Lowest monthly minimum | -14.4 °C (February) (monthly climatological statistic) |
| Annual relative humidity | 80.5% (2 m gridded climatology) |
| Annual corrected precipitation | 3.59 mm/day (climatological daily rate) |
| Annual wind speed | 5.31 m/s (10 m gridded climatology; not a structural design wind speed) |

## 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](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 |

## New York, NY 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 | 1.06 | 15.79 | -13.54 | 82.20 | 3.20 | 6.42 |
| February | 1.41 | 14.34 | -14.43 | 80.84 | 3.37 | 6.31 |
| March | 4.17 | 16.97 | -10.78 | 80.69 | 3.66 | 5.99 |
| April | 9.05 | 24.90 | -2.17 | 81.60 | 3.56 | 5.39 |
| May | 14.28 | 26.84 | 2.73 | 83.80 | 3.25 | 4.63 |
| June | 19.87 | 30.75 | 9.72 | 82.93 | 3.82 | 4.21 |
| July | 23.71 | 34.25 | 14.76 | 79.50 | 3.67 | 4.11 |
| August | 23.69 | 32.44 | 15.79 | 77.67 | 3.67 | 4.10 |
| September | 20.60 | 30.19 | 10.67 | 77.21 | 3.22 | 4.73 |
| October | 14.92 | 28.88 | 3.08 | 77.88 | 3.99 | 5.71 |
| November | 9.25 | 20.26 | -4.63 | 79.40 | 3.37 | 5.95 |
| December | 4.50 | 17.86 | -10.68 | 81.76 | 4.28 | 6.31 |

![Monthly mean, maximum and minimum air temperature for Climate Design Data Workflow for New York, NY](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-new-york-ny/chart-temperature-1344.webp)

*Monthly air temperature for Climate Design Data Workflow for New York, NY, plotted from the table above.*

![Mean daily precipitation by month for Climate Design Data Workflow for New York, NY](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-new-york-ny/chart-precipitation-1344.webp)

*Mean daily precipitation for Climate Design Data Workflow for New York, NY, plotted from the table above.*

## 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](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 Boston, MA](https://harth.build/resources/climate-data/climate-design-data-workflow-boston-ma.md)
- [Climate Design Data Workflow for Washington, DC](https://harth.build/resources/climate-data/climate-design-data-workflow-washington-dc.md)
- [Sun Path & Solar Angles for New York, NY](https://harth.build/resources/solar-data/sun-path-and-solar-angles-new-york-ny.md)

## 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](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=-74.006&latitude=40.7128&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=-74.006&latitude=40.7128&format=JSON)

## Frequently asked questions

### What does NASA POWER climatology show for New York, NY?

For the New York, NY reference point, the 2001–2020 NASA POWER climatology reports 12.3 °C annual mean temperature, 80.5% relative humidity and 3.59 mm/day corrected precipitation. The monthly maximum peaks at 34.2 °C in July.

### Can the New York, NY climatology replace project design temperatures or an hourly weather file?

No. The New York, NY response is gridded monthly climatology; its lowest monthly minimum of -14.4 °C in February 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.

---

- Continue in Harth (open this topic in the Harth agent): https://app.harth.build/?context=%2Fresources%2Fclimate-data%2Fclimate-design-data-workflow-new-york-ny%2F
- View this page in a browser: https://harth.build/resources/climate-data/climate-design-data-workflow-new-york-ny/
- All resources for agents: https://harth.build/llms.txt