# Climate Design Data Workflow for Minneapolis, MN

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

- Canonical: https://harth.build/resources/climate-data/climate-design-data-workflow-minneapolis-mn/
- Last updated: 2026-08-31
- Data source: Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 44.9778° N (America/Chicago) 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=-93.265&latitude=44.9778&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 | 7.0 °C (2 m gridded climatology; not a design percentile) |
| Highest monthly maximum | 41.6 °C (July) (monthly climatological statistic) |
| Lowest monthly minimum | -38.7 °C (January) (monthly climatological statistic) |
| Annual relative humidity | 76.4% (2 m gridded climatology) |
| Annual corrected precipitation | 2.30 mm/day (climatological daily rate) |
| Annual wind speed | 4.14 m/s (10 m gridded climatology; not a structural design wind speed) |

## Direct answer

NASA POWER's 2001–2020 climatology at the Minneapolis, MN reference point reports an annual mean 2 m temperature of 7.0 °C and relative humidity of 76.4%. The highest monthly maximum is 41.6 °C in July, while the lowest monthly minimum is -38.7 °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 2.30 mm/day and annual 10 m wind speed is 4.14 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 |

## Minneapolis, MN 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 | -10.56 | 9.04 | -38.74 | 88.34 | 0.57 | 4.73 |
| February | -8.87 | 15.02 | -32.61 | 86.02 | 0.94 | 4.85 |
| March | -0.56 | 26.99 | -31.73 | 77.94 | 1.41 | 4.67 |
| April | 7.06 | 30.45 | -14.99 | 70.78 | 2.73 | 4.74 |
| May | 13.89 | 34.45 | -4.17 | 70.84 | 3.53 | 4.22 |
| June | 19.84 | 35.61 | 4.27 | 72.83 | 4.33 | 3.67 |
| July | 22.81 | 41.56 | 8.17 | 70.06 | 3.03 | 3.22 |
| August | 21.18 | 37.55 | 6.38 | 70.09 | 3.44 | 3.20 |
| September | 16.74 | 35.11 | -1.01 | 70.51 | 2.98 | 3.78 |
| October | 8.08 | 29.47 | -11.46 | 74.00 | 2.27 | 4.09 |
| November | 0.64 | 24.47 | -20.42 | 78.63 | 1.10 | 4.25 |
| December | -7.08 | 16.14 | -34.40 | 87.47 | 1.20 | 4.34 |

![Monthly mean, maximum and minimum air temperature for Climate Design Data Workflow for Minneapolis, MN](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-minneapolis-mn/chart-temperature-1344.webp)

*Monthly air temperature for Climate Design Data Workflow for Minneapolis, MN, plotted from the table above.*

![Mean daily precipitation by month for Climate Design Data Workflow for Minneapolis, MN](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/climate-data/climate-design-data-workflow-minneapolis-mn/chart-precipitation-1344.webp)

*Mean daily precipitation for Climate Design Data Workflow for Minneapolis, MN, plotted from the table above.*

## Month-by-month climate interpretation

- **January:** mean temperature -10.56 °C is 17.56 °C below the annual mean; the monthly max–min span is 47.78 °C. Relative humidity is 88.34% (11.92 points above annual), while corrected precipitation at 0.57 mm/day is 1.73 mm/day drier than the annual daily rate.
- **February:** mean temperature -8.87 °C is 15.87 °C below the annual mean; the monthly max–min span is 47.63 °C. Relative humidity is 86.02% (9.60 points above annual), while corrected precipitation at 0.94 mm/day is 1.36 mm/day drier than the annual daily rate.
- **March:** mean temperature -0.56 °C is 7.56 °C below the annual mean; the monthly max–min span is 58.72 °C. Relative humidity is 77.94% (1.52 points above annual), while corrected precipitation at 1.41 mm/day is 0.89 mm/day drier than the annual daily rate.
- **April:** mean temperature 7.06 °C is 0.06 °C above the annual mean; the monthly max–min span is 45.44 °C. Relative humidity is 70.78% (5.64 points below annual), while corrected precipitation at 2.73 mm/day is 0.43 mm/day wetter than the annual daily rate.
- **May:** mean temperature 13.89 °C is 6.89 °C above the annual mean; the monthly max–min span is 38.62 °C. Relative humidity is 70.84% (5.58 points below annual), while corrected precipitation at 3.53 mm/day is 1.23 mm/day wetter than the annual daily rate.
- **June:** mean temperature 19.84 °C is 12.84 °C above the annual mean; the monthly max–min span is 31.34 °C. Relative humidity is 72.83% (3.59 points below annual), while corrected precipitation at 4.33 mm/day is 2.03 mm/day wetter than the annual daily rate.
- **July:** mean temperature 22.81 °C is 15.81 °C above the annual mean; the monthly max–min span is 33.39 °C. Relative humidity is 70.06% (6.36 points below annual), while corrected precipitation at 3.03 mm/day is 0.73 mm/day wetter than the annual daily rate.
- **August:** mean temperature 21.18 °C is 14.18 °C above the annual mean; the monthly max–min span is 31.17 °C. Relative humidity is 70.09% (6.33 points below annual), while corrected precipitation at 3.44 mm/day is 1.14 mm/day wetter than the annual daily rate.
- **September:** mean temperature 16.74 °C is 9.74 °C above the annual mean; the monthly max–min span is 36.12 °C. Relative humidity is 70.51% (5.91 points below annual), while corrected precipitation at 2.98 mm/day is 0.68 mm/day wetter than the annual daily rate.
- **October:** mean temperature 8.08 °C is 1.08 °C above the annual mean; the monthly max–min span is 40.93 °C. Relative humidity is 74.00% (2.42 points below annual), while corrected precipitation at 2.27 mm/day is 0.03 mm/day drier than the annual daily rate.
- **November:** mean temperature 0.64 °C is 6.36 °C below the annual mean; the monthly max–min span is 44.89 °C. Relative humidity is 78.63% (2.21 points above annual), while corrected precipitation at 1.10 mm/day is 1.20 mm/day drier than the annual daily rate.
- **December:** mean temperature -7.08 °C is 14.08 °C below the annual mean; the monthly max–min span is 50.54 °C. Relative humidity is 87.47% (11.05 points above annual), while corrected precipitation at 1.20 mm/day is 1.10 mm/day drier than the annual daily rate.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record us:minneapolis-mn. 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 Chicago, IL](https://harth.build/resources/climate-data/climate-design-data-workflow-chicago-il.md)
- [Climate Design Data Workflow for Nashville, TN](https://harth.build/resources/climate-data/climate-design-data-workflow-nashville-tn.md)
- [Sun Path & Solar Angles for Minneapolis, MN](https://harth.build/resources/solar-data/sun-path-and-solar-angles-minneapolis-mn.md)

## Sources and method

Licensed ASHRAE Climatic Design Information / Standard 169 station data plus the locally adopted energy code. Coordinates 44.9778° N (America/Chicago) 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=-93.265&latitude=44.9778&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=-93.265&latitude=44.9778&format=JSON)

## Frequently asked questions

### What does NASA POWER climatology show for Minneapolis, MN?

For the Minneapolis, MN reference point, the 2001–2020 NASA POWER climatology reports 7.0 °C annual mean temperature, 76.4% relative humidity and 2.30 mm/day corrected precipitation. The monthly maximum peaks at 41.6 °C in July.

### Can the Minneapolis, MN climatology replace project design temperatures or an hourly weather file?

No. The Minneapolis, MN response is gridded monthly climatology; its lowest monthly minimum of -38.7 °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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