# Climate Design Data: Geelong, Australia

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

- Canonical: https://harth.build/resources/climate-data/climate-design-data-geelong-au/
- Last updated: 2026-08-31
- Data source: Location data from the [GeoNames AU dump](https://download.geonames.org/export/dump/AU.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2165798). Regulatory starting point: [Australian Building Codes Board and the applicable state or territory authority](https://ncc.abcb.gov.au/). 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=144.36069&latitude=-38.14711&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.

## Key facts

| Fact | Value |
| --- | --- |
| NASA POWER climatology | 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020) (API v2.9.7; LST) |
| Annual mean temperature | 14.4 °C (2 m gridded climatology; not a design percentile) |
| Highest monthly maximum | 43.0 °C (February) (monthly climatological statistic) |
| Lowest monthly minimum | -0.1 °C (July) (monthly climatological statistic) |
| Annual relative humidity | 72.4% (2 m gridded climatology) |
| Annual corrected precipitation | 1.64 mm/day (climatological daily rate) |
| Annual wind speed | 5.19 m/s (10 m gridded climatology; not a structural design wind speed) |

## Direct answer

NASA POWER's 2001–2020 climatology at the Geelong reference point reports an annual mean 2 m temperature of 14.4 °C and relative humidity of 72.4%. The highest monthly maximum is 43.0 °C in February, while the lowest monthly minimum is -0.1 °C in July; 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 1.64 mm/day and annual 10 m wind speed is 5.19 m/s. For climate design data, use the 43.0 °C and -0.1 °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 [Scott Barrington](https://nz.linkedin.com/in/barrington), Harth founder and architectural technology specialist · 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: 14.4 °C
- Highest monthly maximum: 43.0 °C (February)
- Lowest monthly minimum: -0.1 °C (July)

## What must be verified for Geelong?

Geelong is represented here at approximately **-38.1471, 144.3607** 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.

| 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 Geelong 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.

## Geelong 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 | 19.97 | 42.91 | 8.31 | 61.89 | 1.30 | 5.02 |
| February | 19.63 | 43.05 | 7.87 | 65.64 | 1.50 | 4.94 |
| March | 18.26 | 38.11 | 8.36 | 66.20 | 1.17 | 4.87 |
| April | 15.25 | 31.79 | 5.82 | 71.81 | 1.67 | 4.66 |
| May | 12.25 | 26.48 | 3.66 | 78.37 | 1.51 | 5.04 |
| June | 9.93 | 22.53 | 2.17 | 83.15 | 1.86 | 5.13 |
| July | 9.13 | 18.62 | -0.07 | 83.07 | 1.75 | 5.68 |
| August | 9.58 | 21.57 | 1.66 | 79.97 | 1.91 | 5.86 |
| September | 11.45 | 26.53 | 2.04 | 75.67 | 1.76 | 5.64 |
| October | 13.67 | 31.70 | 3.66 | 70.92 | 1.67 | 5.27 |
| November | 16.21 | 37.47 | 3.97 | 68.00 | 2.08 | 4.98 |
| December | 18.04 | 41.64 | 6.80 | 63.94 | 1.50 | 5.10 |

## Geelong ranked monthly climate fingerprint

- **Geelong mean temperature, highest to lowest:** January 19.97 °C, February 19.63 °C, March 18.26 °C, December 18.04 °C, November 16.21 °C, April 15.25 °C, October 13.67 °C, May 12.25 °C, September 11.45 °C, June 9.93 °C, August 9.58 °C, July 9.13 °C.
- **Geelong monthly maximum, highest to lowest:** February 43.05 °C, January 42.91 °C, December 41.64 °C, March 38.11 °C, November 37.47 °C, April 31.79 °C, October 31.70 °C, September 26.53 °C, May 26.48 °C, June 22.53 °C, August 21.57 °C, July 18.62 °C.
- **Geelong monthly minimum, highest to lowest:** March 8.36 °C, January 8.31 °C, February 7.87 °C, December 6.80 °C, April 5.82 °C, November 3.97 °C, May 3.66 °C, October 3.66 °C, June 2.17 °C, September 2.04 °C, August 1.66 °C, July -0.07 °C.
- **Geelong relative humidity, highest to lowest:** June 83.15 %, July 83.07 %, August 79.97 %, May 78.37 %, September 75.67 %, April 71.81 %, October 70.92 %, November 68.00 %, March 66.20 %, February 65.64 %, December 63.94 %, January 61.89 %.
- **Geelong corrected precipitation, highest to lowest:** November 2.08 mm/day, August 1.91 mm/day, June 1.86 mm/day, September 1.76 mm/day, July 1.75 mm/day, April 1.67 mm/day, October 1.67 mm/day, May 1.51 mm/day, December 1.50 mm/day, February 1.50 mm/day, January 1.30 mm/day, March 1.17 mm/day.
- **Geelong 10 m wind speed, highest to lowest:** August 5.86 m/s, July 5.68 m/s, September 5.64 m/s, October 5.27 m/s, June 5.13 m/s, December 5.10 m/s, May 5.04 m/s, January 5.02 m/s, November 4.98 m/s, February 4.94 m/s, March 4.87 m/s, April 4.66 m/s.

## Geelong month-to-month screening ledger

- **Geelong January:** mean 19.97 °C, change from December +1.93 °C; max–min span 34.60 °C; humidity 61.89%, change -2.05 points; precipitation 1.30 mm/day; wind 5.02 m/s.
- **Geelong February:** mean 19.63 °C, change from January -0.34 °C; max–min span 35.18 °C; humidity 65.64%, change +3.75 points; precipitation 1.50 mm/day; wind 4.94 m/s.
- **Geelong March:** mean 18.26 °C, change from February -1.37 °C; max–min span 29.75 °C; humidity 66.20%, change +0.56 points; precipitation 1.17 mm/day; wind 4.87 m/s.
- **Geelong April:** mean 15.25 °C, change from March -3.01 °C; max–min span 25.97 °C; humidity 71.81%, change +5.61 points; precipitation 1.67 mm/day; wind 4.66 m/s.
- **Geelong May:** mean 12.25 °C, change from April -3.00 °C; max–min span 22.82 °C; humidity 78.37%, change +6.56 points; precipitation 1.51 mm/day; wind 5.04 m/s.
- **Geelong June:** mean 9.93 °C, change from May -2.32 °C; max–min span 20.36 °C; humidity 83.15%, change +4.78 points; precipitation 1.86 mm/day; wind 5.13 m/s.
- **Geelong July:** mean 9.13 °C, change from June -0.80 °C; max–min span 18.69 °C; humidity 83.07%, change -0.08 points; precipitation 1.75 mm/day; wind 5.68 m/s.
- **Geelong August:** mean 9.58 °C, change from July +0.45 °C; max–min span 19.91 °C; humidity 79.97%, change -3.10 points; precipitation 1.91 mm/day; wind 5.86 m/s.
- **Geelong September:** mean 11.45 °C, change from August +1.87 °C; max–min span 24.49 °C; humidity 75.67%, change -4.30 points; precipitation 1.76 mm/day; wind 5.64 m/s.
- **Geelong October:** mean 13.67 °C, change from September +2.22 °C; max–min span 28.04 °C; humidity 70.92%, change -4.75 points; precipitation 1.67 mm/day; wind 5.27 m/s.
- **Geelong November:** mean 16.21 °C, change from October +2.54 °C; max–min span 33.50 °C; humidity 68.00%, change -2.92 points; precipitation 2.08 mm/day; wind 4.98 m/s.
- **Geelong December:** mean 18.04 °C, change from November +1.83 °C; max–min span 34.84 °C; humidity 63.94%, change -4.06 points; precipitation 1.50 mm/day; wind 5.10 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 2165798. The ranked fingerprint and transition ledger preserve Geelong'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](https://harth.build/resources/climate-data.md)
- [Climate Design Data: Tarneit, Australia](https://harth.build/resources/climate-data/climate-design-data-tarneit-au.md)
- [Climate Design Data: Point Cook, Australia](https://harth.build/resources/climate-data/climate-design-data-point-cook-au.md)
- [Climate Design Data: City of Port Phillip, Australia](https://harth.build/resources/climate-data/climate-design-data-city-of-port-phillip-au.md)
- [Climate Design Data: Reservoir, Australia](https://harth.build/resources/climate-data/climate-design-data-reservoir-au.md)
- [All climate & energy design data guidance for Australia](https://harth.build/resources/climate-data/australia.md)
- [House Construction Cost Planning: Geelong, Australia](https://harth.build/resources/construction-costs/house-construction-cost-geelong-au.md)
- [Office Construction Cost Planning: Geelong, Australia](https://harth.build/resources/construction-costs/office-construction-cost-geelong-au.md)
- [Retail Construction Cost Planning: Geelong, Australia](https://harth.build/resources/construction-costs/retail-construction-cost-geelong-au.md)
- [School Construction Cost Planning: Geelong, Australia](https://harth.build/resources/construction-costs/school-construction-cost-geelong-au.md)

## Sources and method

Location data from the [GeoNames AU dump](https://download.geonames.org/export/dump/AU.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2165798). Regulatory starting point: [Australian Building Codes Board and the applicable state or territory authority](https://ncc.abcb.gov.au/). 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=144.36069&latitude=-38.14711&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.

### Source links

- [download.geonames.org](https://download.geonames.org/export/dump/AU.zip)

- [ncc.abcb.gov.au](https://ncc.abcb.gov.au/)

- [power.larc.nasa.gov](https://power.larc.nasa.gov/docs/services/api/temporal/climatology/)

- [power.larc.nasa.gov](https://power.larc.nasa.gov/api/temporal/climatology/point?parameters=T2M%2CT2M_MAX%2CT2M_MIN%2CRH2M%2CPRECTOTCORR%2CWS10M&community=SB&longitude=144.36069&latitude=-38.14711&format=JSON)

## Frequently asked questions

### What does NASA POWER climatology show for Geelong?

For the Geelong reference point, the 2001–2020 NASA POWER climatology reports 14.4 °C annual mean temperature, 72.4% relative humidity and 1.64 mm/day corrected precipitation. The monthly maximum peaks at 43.0 °C in February.

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

No. The Geelong response is gridded monthly climatology; its lowest monthly minimum of -0.1 °C in July 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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