Climate Design Data: Epsom, New Zealand

Direct answer

NASA POWER's 2001–2020 climatology at the Epsom reference point reports an annual mean 2 m temperature of 15.7 °C and relative humidity of 78.9%. The highest monthly maximum is 28.1 °C in February, while the lowest monthly minimum is 3.2 °C in August; 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 2.78 mm/day and annual 10 m wind speed is 5.71 m/s. For climate design data, use the 28.1 °C and 3.2 °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.

Prepared by Harth · Harth transformed the cited NASA POWER climatology into this screening table; project design conditions and local applicability remain unreviewed · Published 2026-08-26 · Updated 2026-08-31.

What must be verified for Epsom?

Epsom is represented here at approximately -36.8875, 174.7706 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 Epsom 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.

Epsom NASA POWER monthly climate screening table

Epsom ranked monthly climate fingerprint

• Epsom mean temperature, highest to lowest: February 20.38 °C, January 19.79 °C, March 19.08 °C, December 18.24 °C, April 17.01 °C, November 16.01 °C, May 14.74 °C, October 14.24 °C, September 12.92 °C, June 12.63 °C, August 11.76 °C, July 11.40 °C.
• Epsom monthly maximum, highest to lowest: February 28.15 °C, January 28.00 °C, March 26.79 °C, December 26.28 °C, November 24.78 °C, April 24.58 °C, October 21.77 °C, May 21.57 °C, September 19.51 °C, June 19.40 °C, August 18.28 °C, July 17.73 °C.
• Epsom monthly minimum, highest to lowest: February 11.58 °C, January 11.12 °C, March 10.11 °C, December 8.30 °C, April 8.19 °C, November 7.81 °C, October 6.10 °C, May 5.25 °C, September 4.35 °C, June 4.09 °C, July 3.65 °C, August 3.21 °C.
• Epsom relative humidity, highest to lowest: July 84.29 %, June 83.52 %, August 83.45 %, May 81.62 %, September 81.50 %, October 78.95 %, April 77.68 %, November 76.07 %, December 75.79 %, March 75.30 %, February 74.06 %, January 73.83 %.
• Epsom corrected precipitation, highest to lowest: May 3.81 mm/day, July 3.71 mm/day, June 3.53 mm/day, August 3.22 mm/day, September 2.85 mm/day, April 2.78 mm/day, December 2.60 mm/day, October 2.57 mm/day, March 2.32 mm/day, February 2.27 mm/day, January 1.88 mm/day, November 1.74 mm/day.
• Epsom 10 m wind speed, highest to lowest: October 6.38 m/s, September 6.10 m/s, June 6.01 m/s, November 6.01 m/s, July 5.91 m/s, December 5.84 m/s, August 5.80 m/s, May 5.68 m/s, January 5.41 m/s, April 5.14 m/s, March 5.11 m/s, February 5.04 m/s.

Epsom month-to-month screening ledger

• Epsom January: mean 19.79 °C, change from December +1.55 °C; max–min span 16.88 °C; humidity 73.83%, change -1.96 points; precipitation 1.88 mm/day; wind 5.41 m/s.
• Epsom February: mean 20.38 °C, change from January +0.59 °C; max–min span 16.57 °C; humidity 74.06%, change +0.23 points; precipitation 2.27 mm/day; wind 5.04 m/s.
• Epsom March: mean 19.08 °C, change from February -1.30 °C; max–min span 16.68 °C; humidity 75.30%, change +1.24 points; precipitation 2.32 mm/day; wind 5.11 m/s.
• Epsom April: mean 17.01 °C, change from March -2.07 °C; max–min span 16.39 °C; humidity 77.68%, change +2.38 points; precipitation 2.78 mm/day; wind 5.14 m/s.
• Epsom May: mean 14.74 °C, change from April -2.27 °C; max–min span 16.32 °C; humidity 81.62%, change +3.94 points; precipitation 3.81 mm/day; wind 5.68 m/s.
• Epsom June: mean 12.63 °C, change from May -2.11 °C; max–min span 15.31 °C; humidity 83.52%, change +1.90 points; precipitation 3.53 mm/day; wind 6.01 m/s.
• Epsom July: mean 11.40 °C, change from June -1.23 °C; max–min span 14.08 °C; humidity 84.29%, change +0.77 points; precipitation 3.71 mm/day; wind 5.91 m/s.
• Epsom August: mean 11.76 °C, change from July +0.36 °C; max–min span 15.07 °C; humidity 83.45%, change -0.84 points; precipitation 3.22 mm/day; wind 5.80 m/s.
• Epsom September: mean 12.92 °C, change from August +1.16 °C; max–min span 15.16 °C; humidity 81.50%, change -1.95 points; precipitation 2.85 mm/day; wind 6.10 m/s.
• Epsom October: mean 14.24 °C, change from September +1.32 °C; max–min span 15.67 °C; humidity 78.95%, change -2.55 points; precipitation 2.57 mm/day; wind 6.38 m/s.
• Epsom November: mean 16.01 °C, change from October +1.77 °C; max–min span 16.97 °C; humidity 76.07%, change -2.88 points; precipitation 1.74 mm/day; wind 6.01 m/s.
• Epsom December: mean 18.24 °C, change from November +2.23 °C; max–min span 17.98 °C; humidity 75.79%, change -0.28 points; precipitation 2.60 mm/day; wind 5.84 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 6232235. The ranked fingerprint and transition ledger preserve Epsom'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: New Lynn, New Zealand
• Climate Design Data: Mangere East, New Zealand
• Climate Design Data: Massey East, New Zealand
• Climate Design Data: Hamilton, New Zealand
• All climate & energy design data guidance for New Zealand
• Sun Path: Epsom, New Zealand

Sources and method

Location data from the GeoNames NZ dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 6232235). 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