Climate & Energy Design Data
Climate Design Data: Carlow, Ireland
How to research climate design data for a specific site in Carlow — the controlling authority, source documents, and checks to run before you rely on a number.
On this page
Last updated August 31, 2026 · Location data from the [GeoNames IE dump](https://download.geonames.org/export/dump/IE.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2965768). Regulatory starting point: [Department of Housing, Local Government and Heritage and the local building-control authority](https://www.gov.ie/en/department-of-housing-local-government-and-heritage/collections/building-standards/). 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=-6.92611&latitude=52.84083&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 Carlow reference point reports an annual mean 2 m temperature of 8.9 °C and relative humidity of 90.4%. The highest monthly maximum is 25.9 °C in August, while the lowest monthly minimum is -7.8 °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 2.95 mm/day and annual 10 m wind speed is 5.30 m/s. For climate design data, use the 25.9 °C and -7.8 °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: 8.9 °C
- Highest monthly maximum: 25.9 °C (August)
- Lowest monthly minimum: -7.8 °C (January)
What must be verified for Carlow?
Carlow is represented here at approximately 52.8408, -6.9261 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?
- Fix the surveyed site and local time basis.
- Select an authoritative weather source or a named solar-position algorithm.
- Record period, percentile or scenario and units.
- Test sensitivity to elevation, exposure, urban form and horizon.
- Save the source file, retrieval date and checker in the model record.
| Input | Project-specific evidence | QA question |
|---|---|---|
| Site | surveyed coordinates, elevation and horizon | Does the point represent the building? |
| Weather/solar method | named dataset, algorithm, period and time basis | Are station, time zone and units explicit? |
| Design scenario | current and future scenario agreed by the team | Is an average being mistaken for an extreme? |
| Compliance | adopted local document and edition | Was 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 Carlow 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.
Carlow NASA POWER monthly climate screening table
| Month | Mean °C | Monthly max °C | Monthly min °C | RH % | Precipitation mm/day | Wind at 10 m m/s |
|---|---|---|---|---|---|---|
| January | 4.20 | 13.64 | -7.83 | 95.44 | 2.96 | 6.18 |
| February | 4.14 | 13.35 | -4.88 | 94.08 | 2.66 | 5.96 |
| March | 5.23 | 16.31 | -5.67 | 91.42 | 2.44 | 5.60 |
| April | 7.58 | 19.41 | -3.51 | 87.77 | 2.28 | 4.99 |
| May | 10.41 | 22.97 | -1.03 | 85.20 | 2.43 | 5.01 |
| June | 13.23 | 25.13 | 2.88 | 84.57 | 2.96 | 4.67 |
| July | 14.67 | 25.67 | 5.27 | 85.94 | 3.11 | 4.54 |
| August | 14.23 | 25.93 | 4.70 | 87.45 | 3.36 | 4.75 |
| September | 12.38 | 23.52 | 1.76 | 89.37 | 2.80 | 5.00 |
| October | 9.60 | 18.72 | -1.27 | 92.42 | 3.46 | 5.38 |
| November | 6.53 | 15.33 | -3.45 | 95.26 | 3.56 | 5.62 |
| December | 4.71 | 13.13 | -6.40 | 96.12 | 3.36 | 5.95 |
Carlow ranked monthly climate fingerprint
- Carlow mean temperature, highest to lowest: July 14.67 °C, August 14.23 °C, June 13.23 °C, September 12.38 °C, May 10.41 °C, October 9.60 °C, April 7.58 °C, November 6.53 °C, March 5.23 °C, December 4.71 °C, January 4.20 °C, February 4.14 °C.
- Carlow monthly maximum, highest to lowest: August 25.93 °C, July 25.67 °C, June 25.13 °C, September 23.52 °C, May 22.97 °C, April 19.41 °C, October 18.72 °C, March 16.31 °C, November 15.33 °C, January 13.64 °C, February 13.35 °C, December 13.13 °C.
- Carlow monthly minimum, highest to lowest: July 5.27 °C, August 4.70 °C, June 2.88 °C, September 1.76 °C, May -1.03 °C, October -1.27 °C, November -3.45 °C, April -3.51 °C, February -4.88 °C, March -5.67 °C, December -6.40 °C, January -7.83 °C.
- Carlow relative humidity, highest to lowest: December 96.12 %, January 95.44 %, November 95.26 %, February 94.08 %, October 92.42 %, March 91.42 %, September 89.37 %, April 87.77 %, August 87.45 %, July 85.94 %, May 85.20 %, June 84.57 %.
- Carlow corrected precipitation, highest to lowest: November 3.56 mm/day, October 3.46 mm/day, August 3.36 mm/day, December 3.36 mm/day, July 3.11 mm/day, January 2.96 mm/day, June 2.96 mm/day, September 2.80 mm/day, February 2.66 mm/day, March 2.44 mm/day, May 2.43 mm/day, April 2.28 mm/day.
- Carlow 10 m wind speed, highest to lowest: January 6.18 m/s, February 5.96 m/s, December 5.95 m/s, November 5.62 m/s, March 5.60 m/s, October 5.38 m/s, May 5.01 m/s, September 5.00 m/s, April 4.99 m/s, August 4.75 m/s, June 4.67 m/s, July 4.54 m/s.
Carlow month-to-month screening ledger
- Carlow January: mean 4.20 °C, change from December -0.51 °C; max–min span 21.47 °C; humidity 95.44%, change -0.68 points; precipitation 2.96 mm/day; wind 6.18 m/s.
- Carlow February: mean 4.14 °C, change from January -0.06 °C; max–min span 18.23 °C; humidity 94.08%, change -1.36 points; precipitation 2.66 mm/day; wind 5.96 m/s.
- Carlow March: mean 5.23 °C, change from February +1.09 °C; max–min span 21.98 °C; humidity 91.42%, change -2.66 points; precipitation 2.44 mm/day; wind 5.60 m/s.
- Carlow April: mean 7.58 °C, change from March +2.35 °C; max–min span 22.92 °C; humidity 87.77%, change -3.65 points; precipitation 2.28 mm/day; wind 4.99 m/s.
- Carlow May: mean 10.41 °C, change from April +2.83 °C; max–min span 24.00 °C; humidity 85.20%, change -2.57 points; precipitation 2.43 mm/day; wind 5.01 m/s.
- Carlow June: mean 13.23 °C, change from May +2.82 °C; max–min span 22.25 °C; humidity 84.57%, change -0.63 points; precipitation 2.96 mm/day; wind 4.67 m/s.
- Carlow July: mean 14.67 °C, change from June +1.44 °C; max–min span 20.40 °C; humidity 85.94%, change +1.37 points; precipitation 3.11 mm/day; wind 4.54 m/s.
- Carlow August: mean 14.23 °C, change from July -0.44 °C; max–min span 21.23 °C; humidity 87.45%, change +1.51 points; precipitation 3.36 mm/day; wind 4.75 m/s.
- Carlow September: mean 12.38 °C, change from August -1.85 °C; max–min span 21.76 °C; humidity 89.37%, change +1.92 points; precipitation 2.80 mm/day; wind 5.00 m/s.
- Carlow October: mean 9.60 °C, change from September -2.78 °C; max–min span 19.99 °C; humidity 92.42%, change +3.05 points; precipitation 3.46 mm/day; wind 5.38 m/s.
- Carlow November: mean 6.53 °C, change from October -3.07 °C; max–min span 18.78 °C; humidity 95.26%, change +2.84 points; precipitation 3.56 mm/day; wind 5.62 m/s.
- Carlow December: mean 4.71 °C, change from November -1.82 °C; max–min span 19.53 °C; humidity 96.12%, change +0.86 points; precipitation 3.36 mm/day; wind 5.95 m/s.
Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 2965768. The ranked fingerprint and transition ledger preserve Carlow'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: Droichead Nua, Ireland
- Climate Design Data: Kilkenny, Ireland
- Climate Design Data: Portlaoise, Ireland
- Climate Design Data: Waterford, Ireland
- All climate & energy design data guidance for Ireland
- House Construction Cost Planning: Carlow, Ireland
- Office Construction Cost Planning: Carlow, Ireland
- Retail Construction Cost Planning: Carlow, Ireland
- School Construction Cost Planning: Carlow, Ireland
Sources and method
Location data from the GeoNames IE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2965768). 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
Frequently asked questions
What does NASA POWER climatology show for Carlow?
For the Carlow reference point, the 2001–2020 NASA POWER climatology reports 8.9 °C annual mean temperature, 90.4% relative humidity and 2.95 mm/day corrected precipitation. The monthly maximum peaks at 25.9 °C in August.
Can the Carlow climatology replace project design temperatures or an hourly weather file?
No. The Carlow response is gridded monthly climatology; its lowest monthly minimum of -7.8 °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.
Related pages
- Climate Design Data: Cape Town, South Africa
Cape Town, South Africa climate design data (NASA POWER 2001–2020): annual mean 17.1 °C, monthly max 28.3 °C (October), min 9.2 °C (August), RH 79%.
- Climate Design Data: Cardiff, UK
Cardiff, UK climate design data (NASA POWER 2001–2020): annual mean 10.3 °C, monthly max 30.8 °C (July), min -5.8 °C (February), RH 87%; monthly table.
- Climate Design Data: Carletonville, South Africa
Carletonville, South Africa climate design data (NASA POWER 2001–2020): annual mean 17.4 °C, monthly max 39.9 °C (January), min -5.6 °C (August), RH 52%.
- Climate Design Data: Cebu City, Philippines
Cebu City, Philippines climate design data (NASA POWER 2001–2020): annual mean 27.1 °C, monthly max 35.5 °C (May), min 21.2 °C (January), RH 83%; monthly table.
- Climate Design Data: Central Coast, Australia
Central Coast, Australia climate design data (NASA POWER 2001–2020): annual mean 17.9 °C, monthly max 43.0 °C (February), min 2.0 °C (July), RH 71%.
- Climate Design Data: Chennai, India
Chennai, India climate design data (NASA POWER 2001–2020): annual mean 27.9 °C, monthly max 42.7 °C (May), min 17.2 °C (January), RH 72%; monthly table.