Climate Design Data: Nairobi, Kenya

Direct answer

NASA POWER's 2001–2020 climatology at the Nairobi reference point reports an annual mean 2 m temperature of 20.1 °C and relative humidity of 66.3%. The highest monthly maximum is 35.6 °C in February, while the lowest monthly minimum is 8.7 °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 1.65 mm/day and annual 10 m wind speed is 4.25 m/s. For climate design data, use the 35.6 °C and 8.7 °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: 20.1 °C
• Highest monthly maximum: 35.6 °C (February)
• Lowest monthly minimum: 8.7 °C (January)

What must be verified for Nairobi?

Nairobi is represented here at approximately -1.2833, 36.8167 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 Nairobi 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.

Nairobi NASA POWER monthly climate screening table

Nairobi ranked monthly climate fingerprint

• Nairobi mean temperature, highest to lowest: March 21.62 °C, February 21.42 °C, October 20.84 °C, April 20.54 °C, January 20.51 °C, September 20.34 °C, November 20.17 °C, December 19.97 °C, May 19.32 °C, August 19.20 °C, June 18.72 °C, July 18.69 °C.
• Nairobi monthly maximum, highest to lowest: February 35.59 °C, March 34.27 °C, April 33.15 °C, September 32.75 °C, January 32.70 °C, October 32.67 °C, November 31.09 °C, December 31.08 °C, August 30.81 °C, June 30.51 °C, July 30.13 °C, May 30.01 °C.
• Nairobi monthly minimum, highest to lowest: November 12.43 °C, April 12.17 °C, October 11.91 °C, March 11.16 °C, February 10.97 °C, December 10.75 °C, May 10.46 °C, September 9.82 °C, June 9.13 °C, August 9.00 °C, July 8.97 °C, January 8.67 °C.
• Nairobi relative humidity, highest to lowest: May 75.02 %, April 72.75 %, November 72.51 %, December 71.32 %, June 70.32 %, July 64.06 %, January 63.30 %, March 62.85 %, August 62.65 %, October 62.21 %, September 59.11 %, February 58.94 %.
• Nairobi corrected precipitation, highest to lowest: April 3.80 mm/day, November 2.69 mm/day, May 2.34 mm/day, December 2.10 mm/day, March 2.07 mm/day, October 1.72 mm/day, January 1.27 mm/day, February 1.03 mm/day, June 0.84 mm/day, August 0.70 mm/day, September 0.68 mm/day, July 0.53 mm/day.
• Nairobi 10 m wind speed, highest to lowest: December 4.99 m/s, February 4.92 m/s, November 4.90 m/s, October 4.87 m/s, January 4.81 m/s, March 4.65 m/s, September 4.24 m/s, April 4.15 m/s, August 3.70 m/s, May 3.50 m/s, July 3.28 m/s, June 3.07 m/s.

Nairobi month-to-month screening ledger

• Nairobi January: mean 20.51 °C, change from December +0.54 °C; max–min span 24.03 °C; humidity 63.30%, change -8.02 points; precipitation 1.27 mm/day; wind 4.81 m/s.
• Nairobi February: mean 21.42 °C, change from January +0.91 °C; max–min span 24.62 °C; humidity 58.94%, change -4.36 points; precipitation 1.03 mm/day; wind 4.92 m/s.
• Nairobi March: mean 21.62 °C, change from February +0.20 °C; max–min span 23.11 °C; humidity 62.85%, change +3.91 points; precipitation 2.07 mm/day; wind 4.65 m/s.
• Nairobi April: mean 20.54 °C, change from March -1.08 °C; max–min span 20.98 °C; humidity 72.75%, change +9.90 points; precipitation 3.80 mm/day; wind 4.15 m/s.
• Nairobi May: mean 19.32 °C, change from April -1.22 °C; max–min span 19.55 °C; humidity 75.02%, change +2.27 points; precipitation 2.34 mm/day; wind 3.50 m/s.
• Nairobi June: mean 18.72 °C, change from May -0.60 °C; max–min span 21.38 °C; humidity 70.32%, change -4.70 points; precipitation 0.84 mm/day; wind 3.07 m/s.
• Nairobi July: mean 18.69 °C, change from June -0.03 °C; max–min span 21.16 °C; humidity 64.06%, change -6.26 points; precipitation 0.53 mm/day; wind 3.28 m/s.
• Nairobi August: mean 19.20 °C, change from July +0.51 °C; max–min span 21.81 °C; humidity 62.65%, change -1.41 points; precipitation 0.70 mm/day; wind 3.70 m/s.
• Nairobi September: mean 20.34 °C, change from August +1.14 °C; max–min span 22.93 °C; humidity 59.11%, change -3.54 points; precipitation 0.68 mm/day; wind 4.24 m/s.
• Nairobi October: mean 20.84 °C, change from September +0.50 °C; max–min span 20.76 °C; humidity 62.21%, change +3.10 points; precipitation 1.72 mm/day; wind 4.87 m/s.
• Nairobi November: mean 20.17 °C, change from October -0.67 °C; max–min span 18.66 °C; humidity 72.51%, change +10.30 points; precipitation 2.69 mm/day; wind 4.90 m/s.
• Nairobi December: mean 19.97 °C, change from November -0.20 °C; max–min span 20.33 °C; humidity 71.32%, change -1.19 points; precipitation 2.10 mm/day; wind 4.99 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 184745. The ranked fingerprint and transition ledger preserve Nairobi'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: Kiambu, Kenya
• Climate Design Data: Machakos, Kenya
• Climate Design Data: Mwala, Kenya
• Climate Design Data: Naivasha, Kenya
• All climate & energy design data guidance for Kenya
• House Construction Cost Planning: Nairobi, Kenya
• Office Construction Cost Planning: Nairobi, Kenya
• Retail Construction Cost Planning: Nairobi, Kenya
• School Construction Cost Planning: Nairobi, Kenya

Sources and method

Location data from the GeoNames KE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 184745). 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.

Source links

• download.geonames.org

• nca.go.ke

• power.larc.nasa.gov

• power.larc.nasa.gov