Climate & Energy Design Data

Updated 2026-08-31

Climate Design Data: Machakos, Kenya

How to research climate design data for a specific site in Machakos — the controlling authority, source documents, and checks to run before you rely on a number.

Last updated August 31, 2026 · Location data from the [GeoNames KE dump](https://download.geonames.org/export/dump/KE.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 188492). Regulatory starting point: [National Construction Authority and the applicable county government](https://www.nca.go.ke/). Figures are illustrative — verify against the current locally adopted edition for the site. 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=37.26521&latitude=-1.52233&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.

Direct answer

NASA POWER's 2001–2020 climatology at the Machakos reference point reports an annual mean 2 m temperature of 21.1 °C and relative humidity of 68.1%. The highest monthly maximum is 35.2 °C in February, while the lowest monthly minimum is 10.0 °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 1.80 mm/day and annual 10 m wind speed is 3.03 m/s. For climate design data, use the 35.2 °C and 10.0 °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.

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 Machakos?

Machakos is represented here at approximately -1.5223, 37.2652 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.
InputProject-specific evidenceQA question
Sitesurveyed coordinates, elevation and horizonDoes the point represent the building?
Weather/solar methodnamed dataset, algorithm, period and time basisAre station, time zone and units explicit?
Design scenariocurrent and future scenario agreed by the teamIs an average being mistaken for an extreme?
Complianceadopted local document and editionWas applicability confirmed with the authority?

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 Machakos site remain authoritative.

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.

Machakos NASA POWER monthly climate screening table

MonthMean °CMonthly max °CMonthly min °CRH %Precipitation mm/dayWind at 10 m m/s
January21.6233.529.9865.241.292.92
February22.6535.2412.2960.480.943.00
March22.9635.1313.6064.362.042.91
April21.9233.7314.1773.593.932.82
May20.6031.7511.7475.292.262.76
June19.6531.3210.5171.180.732.66
July19.4131.9110.1066.500.532.92
August19.8531.6710.0764.990.663.38
September21.0733.1811.4661.430.633.63
October21.7632.6312.4864.732.153.45
November21.3331.6813.1074.873.783.04
December21.1332.1111.8273.692.592.92

Machakos ranked monthly climate fingerprint

  • Machakos mean temperature, highest to lowest: March 22.96 °C, February 22.65 °C, April 21.92 °C, October 21.76 °C, January 21.62 °C, November 21.33 °C, December 21.13 °C, September 21.07 °C, May 20.60 °C, August 19.85 °C, June 19.65 °C, July 19.41 °C.
  • Machakos monthly maximum, highest to lowest: February 35.24 °C, March 35.13 °C, April 33.73 °C, January 33.52 °C, September 33.18 °C, October 32.63 °C, December 32.11 °C, July 31.91 °C, May 31.75 °C, November 31.68 °C, August 31.67 °C, June 31.32 °C.
  • Machakos monthly minimum, highest to lowest: April 14.17 °C, March 13.60 °C, November 13.10 °C, October 12.48 °C, February 12.29 °C, December 11.82 °C, May 11.74 °C, September 11.46 °C, June 10.51 °C, July 10.10 °C, August 10.07 °C, January 9.98 °C.
  • Machakos relative humidity, highest to lowest: May 75.29 %, November 74.87 %, December 73.69 %, April 73.59 %, June 71.18 %, July 66.50 %, January 65.24 %, August 64.99 %, October 64.73 %, March 64.36 %, September 61.43 %, February 60.48 %.
  • Machakos corrected precipitation, highest to lowest: April 3.93 mm/day, November 3.78 mm/day, December 2.59 mm/day, May 2.26 mm/day, October 2.15 mm/day, March 2.04 mm/day, January 1.29 mm/day, February 0.94 mm/day, June 0.73 mm/day, August 0.66 mm/day, September 0.63 mm/day, July 0.53 mm/day.
  • Machakos 10 m wind speed, highest to lowest: September 3.63 m/s, October 3.45 m/s, August 3.38 m/s, November 3.04 m/s, February 3.00 m/s, December 2.92 m/s, January 2.92 m/s, July 2.92 m/s, March 2.91 m/s, April 2.82 m/s, May 2.76 m/s, June 2.66 m/s.

Machakos month-to-month screening ledger

  • Machakos January: mean 21.62 °C, change from December +0.49 °C; max–min span 23.54 °C; humidity 65.24%, change -8.45 points; precipitation 1.29 mm/day; wind 2.92 m/s.
  • Machakos February: mean 22.65 °C, change from January +1.03 °C; max–min span 22.95 °C; humidity 60.48%, change -4.76 points; precipitation 0.94 mm/day; wind 3.00 m/s.
  • Machakos March: mean 22.96 °C, change from February +0.31 °C; max–min span 21.53 °C; humidity 64.36%, change +3.88 points; precipitation 2.04 mm/day; wind 2.91 m/s.
  • Machakos April: mean 21.92 °C, change from March -1.04 °C; max–min span 19.56 °C; humidity 73.59%, change +9.23 points; precipitation 3.93 mm/day; wind 2.82 m/s.
  • Machakos May: mean 20.60 °C, change from April -1.32 °C; max–min span 20.01 °C; humidity 75.29%, change +1.70 points; precipitation 2.26 mm/day; wind 2.76 m/s.
  • Machakos June: mean 19.65 °C, change from May -0.95 °C; max–min span 20.81 °C; humidity 71.18%, change -4.11 points; precipitation 0.73 mm/day; wind 2.66 m/s.
  • Machakos July: mean 19.41 °C, change from June -0.24 °C; max–min span 21.81 °C; humidity 66.50%, change -4.68 points; precipitation 0.53 mm/day; wind 2.92 m/s.
  • Machakos August: mean 19.85 °C, change from July +0.44 °C; max–min span 21.60 °C; humidity 64.99%, change -1.51 points; precipitation 0.66 mm/day; wind 3.38 m/s.
  • Machakos September: mean 21.07 °C, change from August +1.22 °C; max–min span 21.72 °C; humidity 61.43%, change -3.56 points; precipitation 0.63 mm/day; wind 3.63 m/s.
  • Machakos October: mean 21.76 °C, change from September +0.69 °C; max–min span 20.15 °C; humidity 64.73%, change +3.30 points; precipitation 2.15 mm/day; wind 3.45 m/s.
  • Machakos November: mean 21.33 °C, change from October -0.43 °C; max–min span 18.58 °C; humidity 74.87%, change +10.14 points; precipitation 3.78 mm/day; wind 3.04 m/s.
  • Machakos December: mean 21.13 °C, change from November -0.20 °C; max–min span 20.29 °C; humidity 73.69%, change -1.18 points; precipitation 2.59 mm/day; wind 2.92 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 188492. The ranked fingerprint and transition ledger preserve Machakos'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.

Sources and method

Location data from the GeoNames KE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 188492). Regulatory starting point: National Construction Authority and the applicable county government. 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.

Frequently asked questions

What does NASA POWER climatology show for Machakos?

For the Machakos reference point, the 2001–2020 NASA POWER climatology reports 21.1 °C annual mean temperature, 68.1% relative humidity and 1.80 mm/day corrected precipitation. The monthly maximum peaks at 35.2 °C in February.

Can the Machakos climatology replace project design temperatures or an hourly weather file?

No. The Machakos response is gridded monthly climatology; its lowest monthly minimum of 10.0 °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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