Climate Design Data: Nelson, New Zealand

Direct answer

NASA POWER's 2001–2020 climatology at the Nelson reference point reports an annual mean 2 m temperature of 10.1 °C and relative humidity of 80.9%. The highest monthly maximum is 33.7 °C in February, while the lowest monthly minimum is -5.0 °C in June; 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 2.70 mm/day and annual 10 m wind speed is 2.50 m/s. For climate design data, use the 33.7 °C and -5.0 °C monthly extrema to screen seasonal exposure, then obtain the adopted percentile 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 2026-08-26 · Updated 2026-08-31.

What are the key takeaways?

• NASA POWER climatology: 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020)
• Annual mean temperature: 10.1 °C
• Highest monthly maximum: 33.7 °C (February)
• Lowest monthly minimum: -5.0 °C (June)

What must be verified for Nelson?

Nelson is represented here at approximately -41.2708, 173.2840 for discovery and workflow planning. A project address, parcel, elevation, exposure, authority, and submission date must replace that city-centre reference before design use.

How should climate design data be established?

1. Fix the surveyed site and local time basis.
2. Select an authoritative weather source or a named solar-position algorithm.
3. Record period, percentile or scenario and units.
4. Test sensitivity to elevation, exposure, urban form and horizon.
5. Save the source file, retrieval date and checker in the model record.

What are the limits of this worksheet?

This climate-design-workflow page is a project-starting worksheet, not a design value or approval. The controlling authority and qualified professionals for the Nelson site remain authoritative.

Which related searches does this primary location record cover?

This primary route consolidates the location evidence needed for Climate Design Data, Weather File Guide, Overheating Weather Data, Building Climate Checklist. A narrower route should be released only when it adds a materially different official source, calculation, process, threshold or worked example.

Nelson NASA POWER monthly climate screening table

Nelson ranked monthly climate fingerprint

• Nelson mean temperature, highest to lowest: February 15.95 °C, January 15.80 °C, March 13.91 °C, December 13.88 °C, November 11.36 °C, April 10.72 °C, October 9.05 °C, May 8.04 °C, September 7.30 °C, August 5.66 °C, June 5.62 °C, July 4.60 °C.
• Nelson monthly maximum, highest to lowest: February 33.71 °C, January 32.11 °C, March 27.99 °C, December 27.67 °C, November 25.07 °C, April 21.85 °C, October 21.15 °C, May 20.05 °C, September 17.69 °C, August 15.67 °C, June 15.67 °C, July 12.83 °C.
• Nelson monthly minimum, highest to lowest: February 4.53 °C, January 3.58 °C, March 2.78 °C, December 0.36 °C, April 0.07 °C, November -0.64 °C, May -2.20 °C, September -2.46 °C, October -2.75 °C, August -4.48 °C, July -4.73 °C, June -4.95 °C.
• Nelson relative humidity, highest to lowest: June 90.53 %, July 90.22 %, August 88.82 %, May 87.47 %, September 84.84 %, October 81.86 %, April 81.47 %, November 77.56 %, December 74.70 %, March 74.19 %, January 69.76 %, February 69.21 %.
• Nelson corrected precipitation, highest to lowest: June 3.46 mm/day, December 3.08 mm/day, May 3.07 mm/day, April 2.94 mm/day, October 2.93 mm/day, July 2.70 mm/day, September 2.66 mm/day, August 2.62 mm/day, January 2.30 mm/day, November 2.21 mm/day, March 2.20 mm/day, February 2.13 mm/day.
• Nelson 10 m wind speed, highest to lowest: October 2.75 m/s, November 2.71 m/s, September 2.67 m/s, January 2.61 m/s, December 2.54 m/s, June 2.51 m/s, May 2.44 m/s, July 2.41 m/s, March 2.37 m/s, February 2.36 m/s, August 2.31 m/s, April 2.29 m/s.

Nelson month-to-month screening ledger

• Nelson January: mean 15.80 °C, change from December +1.92 °C; max–min span 28.53 °C; humidity 69.76%, change -4.94 points; precipitation 2.30 mm/day; wind 2.61 m/s.
• Nelson February: mean 15.95 °C, change from January +0.15 °C; max–min span 29.18 °C; humidity 69.21%, change -0.55 points; precipitation 2.13 mm/day; wind 2.36 m/s.
• Nelson March: mean 13.91 °C, change from February -2.04 °C; max–min span 25.21 °C; humidity 74.19%, change +4.98 points; precipitation 2.20 mm/day; wind 2.37 m/s.
• Nelson April: mean 10.72 °C, change from March -3.19 °C; max–min span 21.78 °C; humidity 81.47%, change +7.28 points; precipitation 2.94 mm/day; wind 2.29 m/s.
• Nelson May: mean 8.04 °C, change from April -2.68 °C; max–min span 22.25 °C; humidity 87.47%, change +6.00 points; precipitation 3.07 mm/day; wind 2.44 m/s.
• Nelson June: mean 5.62 °C, change from May -2.42 °C; max–min span 20.62 °C; humidity 90.53%, change +3.06 points; precipitation 3.46 mm/day; wind 2.51 m/s.
• Nelson July: mean 4.60 °C, change from June -1.02 °C; max–min span 17.56 °C; humidity 90.22%, change -0.31 points; precipitation 2.70 mm/day; wind 2.41 m/s.
• Nelson August: mean 5.66 °C, change from July +1.06 °C; max–min span 20.15 °C; humidity 88.82%, change -1.40 points; precipitation 2.62 mm/day; wind 2.31 m/s.
• Nelson September: mean 7.30 °C, change from August +1.64 °C; max–min span 20.15 °C; humidity 84.84%, change -3.98 points; precipitation 2.66 mm/day; wind 2.67 m/s.
• Nelson October: mean 9.05 °C, change from September +1.75 °C; max–min span 23.90 °C; humidity 81.86%, change -2.98 points; precipitation 2.93 mm/day; wind 2.75 m/s.
• Nelson November: mean 11.36 °C, change from October +2.31 °C; max–min span 25.71 °C; humidity 77.56%, change -4.30 points; precipitation 2.21 mm/day; wind 2.71 m/s.
• Nelson December: mean 13.88 °C, change from November +2.52 °C; max–min span 27.31 °C; humidity 74.70%, change -2.86 points; precipitation 3.08 mm/day; wind 2.54 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 2186280. The ranked fingerprint and transition ledger preserve Nelson's monthly order and successive changes for source comparison. This 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
• Climate Design Data: Richmond, New Zealand
• Climate Design Data: Blenheim, New Zealand
• Climate Design Data: Wellington, New Zealand
• Climate Design Data: Paraparaumu, New Zealand
• All climate & energy design data guidance for New Zealand
• House Construction Cost Planning: Nelson, New Zealand
• Office Construction Cost Planning: Nelson, New Zealand
• Retail Construction Cost Planning: Nelson, New Zealand
• School Construction Cost Planning: Nelson, New Zealand

Sources and method

Location data from the GeoNames NZ dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2186280). Regulatory starting point: Ministry of Business, Innovation and Employment and the local council. Figures are illustrative — verify against the current locally adopted edition for the site. 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

• download.geonames.org

• building.govt.nz

• power.larc.nasa.gov

• power.larc.nasa.gov