Climate Design Data: Middelburg, South Africa

Direct answer

NASA POWER's 2001–2020 climatology at the Middelburg reference point reports an annual mean 2 m temperature of 16.5 °C and relative humidity of 58.8%. The highest monthly maximum is 38.1 °C in January, while the lowest monthly minimum is -5.3 °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 1.80 mm/day and annual 10 m wind speed is 3.50 m/s. For climate design data, use the 38.1 °C and -5.3 °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 Middelburg?

Middelburg is represented here at approximately -25.7751, 29.4648 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 Middelburg 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.

Middelburg NASA POWER monthly climate screening table

Middelburg ranked monthly climate fingerprint

• Middelburg mean temperature, highest to lowest: January 20.68 °C, December 20.64 °C, February 20.53 °C, November 19.90 °C, October 19.18 °C, March 19.17 °C, September 17.03 °C, April 16.18 °C, May 12.95 °C, August 12.90 °C, June 9.75 °C, July 9.66 °C.
• Middelburg monthly maximum, highest to lowest: January 38.11 °C, November 36.32 °C, December 36.19 °C, October 35.77 °C, February 34.84 °C, September 33.33 °C, March 33.11 °C, April 30.84 °C, August 30.03 °C, May 29.24 °C, July 25.68 °C, June 24.99 °C.
• Middelburg monthly minimum, highest to lowest: February 7.85 °C, March 6.28 °C, January 5.86 °C, December 5.71 °C, November 3.68 °C, October 2.60 °C, April 0.98 °C, September -1.95 °C, July -3.98 °C, May -4.57 °C, June -4.90 °C, August -5.35 °C.
• Middelburg relative humidity, highest to lowest: January 68.85 %, February 67.54 %, March 66.62 %, December 66.61 %, April 65.50 %, November 61.00 %, June 57.64 %, May 57.40 %, October 52.94 %, July 51.94 %, August 46.92 %, September 43.01 %.
• Middelburg corrected precipitation, highest to lowest: December 4.17 mm/day, January 4.10 mm/day, November 3.16 mm/day, February 2.79 mm/day, March 2.44 mm/day, October 2.11 mm/day, April 1.39 mm/day, September 0.51 mm/day, May 0.39 mm/day, August 0.24 mm/day, June 0.17 mm/day, July 0.12 mm/day.
• Middelburg 10 m wind speed, highest to lowest: September 4.27 m/s, October 4.14 m/s, August 4.04 m/s, November 3.82 m/s, July 3.53 m/s, June 3.50 m/s, December 3.34 m/s, May 3.19 m/s, January 3.13 m/s, February 3.05 m/s, April 3.03 m/s, March 2.98 m/s.

Middelburg month-to-month screening ledger

• Middelburg January: mean 20.68 °C, change from December +0.04 °C; max–min span 32.25 °C; humidity 68.85%, change +2.24 points; precipitation 4.10 mm/day; wind 3.13 m/s.
• Middelburg February: mean 20.53 °C, change from January -0.15 °C; max–min span 26.99 °C; humidity 67.54%, change -1.31 points; precipitation 2.79 mm/day; wind 3.05 m/s.
• Middelburg March: mean 19.17 °C, change from February -1.36 °C; max–min span 26.83 °C; humidity 66.62%, change -0.92 points; precipitation 2.44 mm/day; wind 2.98 m/s.
• Middelburg April: mean 16.18 °C, change from March -2.99 °C; max–min span 29.86 °C; humidity 65.50%, change -1.12 points; precipitation 1.39 mm/day; wind 3.03 m/s.
• Middelburg May: mean 12.95 °C, change from April -3.23 °C; max–min span 33.81 °C; humidity 57.40%, change -8.10 points; precipitation 0.39 mm/day; wind 3.19 m/s.
• Middelburg June: mean 9.75 °C, change from May -3.20 °C; max–min span 29.89 °C; humidity 57.64%, change +0.24 points; precipitation 0.17 mm/day; wind 3.50 m/s.
• Middelburg July: mean 9.66 °C, change from June -0.09 °C; max–min span 29.66 °C; humidity 51.94%, change -5.70 points; precipitation 0.12 mm/day; wind 3.53 m/s.
• Middelburg August: mean 12.90 °C, change from July +3.24 °C; max–min span 35.38 °C; humidity 46.92%, change -5.02 points; precipitation 0.24 mm/day; wind 4.04 m/s.
• Middelburg September: mean 17.03 °C, change from August +4.13 °C; max–min span 35.28 °C; humidity 43.01%, change -3.91 points; precipitation 0.51 mm/day; wind 4.27 m/s.
• Middelburg October: mean 19.18 °C, change from September +2.15 °C; max–min span 33.17 °C; humidity 52.94%, change +9.93 points; precipitation 2.11 mm/day; wind 4.14 m/s.
• Middelburg November: mean 19.90 °C, change from October +0.72 °C; max–min span 32.64 °C; humidity 61.00%, change +8.06 points; precipitation 3.16 mm/day; wind 3.82 m/s.
• Middelburg December: mean 20.64 °C, change from November +0.74 °C; max–min span 30.48 °C; humidity 66.61%, change +5.61 points; precipitation 4.17 mm/day; wind 3.34 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 976361. The ranked fingerprint and transition ledger preserve Middelburg'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: Emalahleni, South Africa
• Climate Design Data: Pretoria, South Africa
• Climate Design Data: Ivory Park, South Africa
• Climate Design Data: Soshanguve, South Africa
• All climate & energy design data guidance for South Africa
• Sun Path: Middelburg, South Africa

Sources and method

Location data from the GeoNames ZA dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 976361). Regulatory starting point: South African Bureau of Standards and the local authority. 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

• sabs.co.za

• power.larc.nasa.gov

• power.larc.nasa.gov