Climate Design Data: Johor Bahru, Malaysia

Direct answer

NASA POWER's 2001–2020 climatology at the Johor Bahru reference point reports an annual mean 2 m temperature of 27.1 °C and relative humidity of 84.6%. The highest monthly maximum is 33.9 °C in October, while the lowest monthly minimum is 20.8 °C in February; 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 6.48 mm/day and annual 10 m wind speed is 2.80 m/s. For climate design data, use the 33.9 °C and 20.8 °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: 27.1 °C
• Highest monthly maximum: 33.9 °C (October)
• Lowest monthly minimum: 20.8 °C (February)

What must be verified for Johor Bahru?

Johor Bahru is represented here at approximately 1.4655, 103.7578 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 Johor Bahru 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.

Johor Bahru NASA POWER monthly climate screening table

Johor Bahru ranked monthly climate fingerprint

• Johor Bahru mean temperature, highest to lowest: May 28.08 °C, April 27.82 °C, June 27.59 °C, October 27.31 °C, September 27.15 °C, July 27.14 °C, August 27.09 °C, March 27.01 °C, November 26.94 °C, December 26.29 °C, February 26.17 °C, January 25.94 °C.
• Johor Bahru monthly maximum, highest to lowest: October 33.89 °C, May 33.86 °C, April 33.65 °C, March 32.91 °C, June 32.60 °C, September 32.58 °C, November 32.31 °C, July 32.17 °C, February 32.05 °C, August 31.44 °C, January 31.04 °C, December 30.95 °C.
• Johor Bahru monthly minimum, highest to lowest: May 24.79 °C, June 24.45 °C, August 24.16 °C, October 24.12 °C, September 24.07 °C, November 23.90 °C, July 23.89 °C, April 23.65 °C, December 23.05 °C, March 22.53 °C, January 21.45 °C, February 20.76 °C.
• Johor Bahru relative humidity, highest to lowest: December 88.21 %, January 87.99 %, February 86.05 %, November 85.05 %, July 84.73 %, August 84.44 %, March 84.03 %, June 83.76 %, September 83.45 %, May 82.73 %, October 82.52 %, April 82.22 %.
• Johor Bahru corrected precipitation, highest to lowest: December 9.69 mm/day, November 9.44 mm/day, January 7.57 mm/day, October 6.76 mm/day, April 6.43 mm/day, May 6.41 mm/day, July 5.62 mm/day, August 5.58 mm/day, September 5.56 mm/day, June 5.45 mm/day, March 5.43 mm/day, February 3.62 mm/day.
• Johor Bahru 10 m wind speed, highest to lowest: February 3.71 m/s, January 3.71 m/s, December 3.19 m/s, August 3.07 m/s, July 2.93 m/s, March 2.80 m/s, September 2.72 m/s, June 2.65 m/s, October 2.26 m/s, May 2.25 m/s, November 2.24 m/s, April 2.10 m/s.

Johor Bahru month-to-month screening ledger

• Johor Bahru January: mean 25.94 °C, change from December -0.35 °C; max–min span 9.59 °C; humidity 87.99%, change -0.22 points; precipitation 7.57 mm/day; wind 3.71 m/s.
• Johor Bahru February: mean 26.17 °C, change from January +0.23 °C; max–min span 11.29 °C; humidity 86.05%, change -1.94 points; precipitation 3.62 mm/day; wind 3.71 m/s.
• Johor Bahru March: mean 27.01 °C, change from February +0.84 °C; max–min span 10.38 °C; humidity 84.03%, change -2.02 points; precipitation 5.43 mm/day; wind 2.80 m/s.
• Johor Bahru April: mean 27.82 °C, change from March +0.81 °C; max–min span 10.00 °C; humidity 82.22%, change -1.81 points; precipitation 6.43 mm/day; wind 2.10 m/s.
• Johor Bahru May: mean 28.08 °C, change from April +0.26 °C; max–min span 9.07 °C; humidity 82.73%, change +0.51 points; precipitation 6.41 mm/day; wind 2.25 m/s.
• Johor Bahru June: mean 27.59 °C, change from May -0.49 °C; max–min span 8.15 °C; humidity 83.76%, change +1.03 points; precipitation 5.45 mm/day; wind 2.65 m/s.
• Johor Bahru July: mean 27.14 °C, change from June -0.45 °C; max–min span 8.28 °C; humidity 84.73%, change +0.97 points; precipitation 5.62 mm/day; wind 2.93 m/s.
• Johor Bahru August: mean 27.09 °C, change from July -0.05 °C; max–min span 7.28 °C; humidity 84.44%, change -0.29 points; precipitation 5.58 mm/day; wind 3.07 m/s.
• Johor Bahru September: mean 27.15 °C, change from August +0.06 °C; max–min span 8.51 °C; humidity 83.45%, change -0.99 points; precipitation 5.56 mm/day; wind 2.72 m/s.
• Johor Bahru October: mean 27.31 °C, change from September +0.16 °C; max–min span 9.77 °C; humidity 82.52%, change -0.93 points; precipitation 6.76 mm/day; wind 2.26 m/s.
• Johor Bahru November: mean 26.94 °C, change from October -0.37 °C; max–min span 8.41 °C; humidity 85.05%, change +2.53 points; precipitation 9.44 mm/day; wind 2.24 m/s.
• Johor Bahru December: mean 26.29 °C, change from November -0.65 °C; max–min span 7.90 °C; humidity 88.21%, change +3.16 points; precipitation 9.69 mm/day; wind 3.19 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 1732752. The ranked fingerprint and transition ledger preserve Johor Bahru'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: Kluang, Malaysia
• Climate Design Data: Muar, Malaysia
• Climate Design Data: Malacca, Malaysia
• Climate Design Data: Seremban, Malaysia
• All climate & energy design data guidance for Malaysia
• House Construction Cost Planning: Johor Bahru, Malaysia
• Office Construction Cost Planning: Johor Bahru, Malaysia
• Retail Construction Cost Planning: Johor Bahru, Malaysia
• School Construction Cost Planning: Johor Bahru, Malaysia

Sources and method

Location data from the GeoNames MY dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1732752). Regulatory starting point: the applicable state and 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

• jkt.kpkt.gov.my

• power.larc.nasa.gov

• power.larc.nasa.gov