Climate Design Data: Tallaght, Ireland

Direct answer

NASA POWER's 2001–2020 climatology at the Tallaght reference point reports an annual mean 2 m temperature of 10.1 °C and relative humidity of 87.6%. The highest monthly maximum is 24.3 °C in July, while the lowest monthly minimum is -2.2 °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 2.69 mm/day and annual 10 m wind speed is 6.05 m/s. For climate design data, use the 24.3 °C and -2.2 °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 Tallaght?

Tallaght is represented here at approximately 53.2859, -6.3734 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 Tallaght 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.

Tallaght NASA POWER monthly climate screening table

Tallaght ranked monthly climate fingerprint

• Tallaght mean temperature, highest to lowest: July 15.11 °C, August 15.00 °C, June 13.59 °C, September 13.50 °C, October 11.16 °C, May 10.90 °C, April 8.36 °C, November 8.35 °C, December 6.53 °C, March 6.40 °C, January 5.84 °C, February 5.62 °C.
• Tallaght monthly maximum, highest to lowest: July 24.31 °C, August 23.78 °C, June 21.78 °C, September 21.53 °C, May 21.49 °C, October 18.21 °C, April 17.46 °C, November 15.65 °C, March 14.68 °C, January 13.92 °C, December 13.55 °C, February 13.10 °C.
• Tallaght monthly minimum, highest to lowest: August 8.62 °C, July 8.35 °C, September 6.07 °C, June 5.40 °C, May 2.85 °C, October 2.45 °C, April 0.20 °C, November -0.22 °C, December -1.59 °C, January -1.78 °C, March -2.03 °C, February -2.18 °C.
• Tallaght relative humidity, highest to lowest: December 91.32 %, January 90.78 %, November 90.42 %, February 89.76 %, October 88.44 %, March 88.12 %, September 87.15 %, August 86.13 %, April 85.92 %, July 85.24 %, June 84.28 %, May 84.17 %.
• Tallaght corrected precipitation, highest to lowest: November 3.52 mm/day, October 3.30 mm/day, December 3.14 mm/day, August 2.94 mm/day, January 2.78 mm/day, July 2.57 mm/day, June 2.54 mm/day, September 2.53 mm/day, February 2.49 mm/day, March 2.25 mm/day, May 2.17 mm/day, April 2.03 mm/day.
• Tallaght 10 m wind speed, highest to lowest: January 7.47 m/s, December 7.27 m/s, February 7.00 m/s, November 6.90 m/s, October 6.42 m/s, March 6.40 m/s, September 5.66 m/s, April 5.52 m/s, May 5.35 m/s, August 5.10 m/s, June 4.86 m/s, July 4.71 m/s.

Tallaght month-to-month screening ledger

• Tallaght January: mean 5.84 °C, change from December -0.69 °C; max–min span 15.70 °C; humidity 90.78%, change -0.54 points; precipitation 2.78 mm/day; wind 7.47 m/s.
• Tallaght February: mean 5.62 °C, change from January -0.22 °C; max–min span 15.28 °C; humidity 89.76%, change -1.02 points; precipitation 2.49 mm/day; wind 7.00 m/s.
• Tallaght March: mean 6.40 °C, change from February +0.78 °C; max–min span 16.71 °C; humidity 88.12%, change -1.64 points; precipitation 2.25 mm/day; wind 6.40 m/s.
• Tallaght April: mean 8.36 °C, change from March +1.96 °C; max–min span 17.26 °C; humidity 85.92%, change -2.20 points; precipitation 2.03 mm/day; wind 5.52 m/s.
• Tallaght May: mean 10.90 °C, change from April +2.54 °C; max–min span 18.64 °C; humidity 84.17%, change -1.75 points; precipitation 2.17 mm/day; wind 5.35 m/s.
• Tallaght June: mean 13.59 °C, change from May +2.69 °C; max–min span 16.38 °C; humidity 84.28%, change +0.11 points; precipitation 2.54 mm/day; wind 4.86 m/s.
• Tallaght July: mean 15.11 °C, change from June +1.52 °C; max–min span 15.96 °C; humidity 85.24%, change +0.96 points; precipitation 2.57 mm/day; wind 4.71 m/s.
• Tallaght August: mean 15.00 °C, change from July -0.11 °C; max–min span 15.16 °C; humidity 86.13%, change +0.89 points; precipitation 2.94 mm/day; wind 5.10 m/s.
• Tallaght September: mean 13.50 °C, change from August -1.50 °C; max–min span 15.46 °C; humidity 87.15%, change +1.02 points; precipitation 2.53 mm/day; wind 5.66 m/s.
• Tallaght October: mean 11.16 °C, change from September -2.34 °C; max–min span 15.76 °C; humidity 88.44%, change +1.29 points; precipitation 3.30 mm/day; wind 6.42 m/s.
• Tallaght November: mean 8.35 °C, change from October -2.81 °C; max–min span 15.87 °C; humidity 90.42%, change +1.98 points; precipitation 3.52 mm/day; wind 6.90 m/s.
• Tallaght December: mean 6.53 °C, change from November -1.82 °C; max–min span 15.14 °C; humidity 91.32%, change +0.90 points; precipitation 3.14 mm/day; wind 7.27 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 2961284. The ranked fingerprint and transition ledger preserve Tallaght'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: Maynooth, Ireland
• Climate Design Data: Naas, Ireland
• Climate Design Data: Greystones, Ireland
• Climate Design Data: Kilquade, Ireland
• All climate & energy design data guidance for Ireland
• Daylight & Orientation: Tallaght, Ireland
• Solar Altitude & Azimuth: Tallaght, Ireland
• Solar Shading Design: Tallaght, Ireland
• Sun Path: Tallaght, Ireland

Sources and method

Location data from the GeoNames IE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2961284). Regulatory starting point: Department of Housing, Local Government and Heritage and the local building-control 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

• gov.ie

• power.larc.nasa.gov

• power.larc.nasa.gov