Climate Design Data: Richmond Hill, Canada

Direct answer

NASA POWER's 2001–2020 climatology at the Richmond Hill reference point reports an annual mean 2 m temperature of 7.8 °C and relative humidity of 78.6%. The highest monthly maximum is 35.8 °C in August, while the lowest monthly minimum is -29.2 °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 1.98 mm/day and annual 10 m wind speed is 4.74 m/s. For climate design data, use the 35.8 °C and -29.2 °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 Richmond Hill?

Richmond Hill is represented here at approximately 43.8711, -79.4373 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 Richmond Hill 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.

Richmond Hill NASA POWER monthly climate screening table

Richmond Hill ranked monthly climate fingerprint

• Richmond Hill mean temperature, highest to lowest: July 22.05 °C, August 21.36 °C, June 18.16 °C, September 17.36 °C, May 12.08 °C, October 9.72 °C, April 5.18 °C, November 3.11 °C, March -1.13 °C, December -2.77 °C, February -6.18 °C, January -6.36 °C.
• Richmond Hill monthly maximum, highest to lowest: August 35.82 °C, July 35.65 °C, June 34.64 °C, September 33.43 °C, May 31.86 °C, October 28.33 °C, April 24.28 °C, March 23.87 °C, November 21.07 °C, December 13.98 °C, February 13.30 °C, January 11.93 °C.
• Richmond Hill monthly minimum, highest to lowest: August 9.61 °C, July 7.82 °C, June 3.45 °C, September 3.37 °C, October -2.86 °C, May -3.25 °C, November -13.30 °C, April -14.28 °C, December -20.95 °C, January -26.89 °C, March -28.23 °C, February -29.25 °C.
• Richmond Hill relative humidity, highest to lowest: January 90.56 %, February 89.31 %, December 89.28 %, November 84.02 %, March 82.95 %, April 78.53 %, October 78.49 %, May 75.84 %, June 71.30 %, September 70.78 %, August 66.86 %, July 65.48 %.
• Richmond Hill corrected precipitation, highest to lowest: October 2.26 mm/day, June 2.20 mm/day, April 2.19 mm/day, May 2.17 mm/day, November 2.14 mm/day, July 2.08 mm/day, September 1.96 mm/day, December 1.94 mm/day, August 1.79 mm/day, January 1.67 mm/day, March 1.66 mm/day, February 1.65 mm/day.
• Richmond Hill 10 m wind speed, highest to lowest: February 5.84 m/s, January 5.63 m/s, March 5.47 m/s, December 5.33 m/s, April 5.17 m/s, November 4.99 m/s, October 4.77 m/s, May 4.24 m/s, September 4.04 m/s, June 3.94 m/s, August 3.76 m/s, July 3.76 m/s.

Richmond Hill month-to-month screening ledger

• Richmond Hill January: mean -6.36 °C, change from December -3.59 °C; max–min span 38.82 °C; humidity 90.56%, change +1.28 points; precipitation 1.67 mm/day; wind 5.63 m/s.
• Richmond Hill February: mean -6.18 °C, change from January +0.18 °C; max–min span 42.55 °C; humidity 89.31%, change -1.25 points; precipitation 1.65 mm/day; wind 5.84 m/s.
• Richmond Hill March: mean -1.13 °C, change from February +5.05 °C; max–min span 52.10 °C; humidity 82.95%, change -6.36 points; precipitation 1.66 mm/day; wind 5.47 m/s.
• Richmond Hill April: mean 5.18 °C, change from March +6.31 °C; max–min span 38.56 °C; humidity 78.53%, change -4.42 points; precipitation 2.19 mm/day; wind 5.17 m/s.
• Richmond Hill May: mean 12.08 °C, change from April +6.90 °C; max–min span 35.11 °C; humidity 75.84%, change -2.69 points; precipitation 2.17 mm/day; wind 4.24 m/s.
• Richmond Hill June: mean 18.16 °C, change from May +6.08 °C; max–min span 31.19 °C; humidity 71.30%, change -4.54 points; precipitation 2.20 mm/day; wind 3.94 m/s.
• Richmond Hill July: mean 22.05 °C, change from June +3.89 °C; max–min span 27.83 °C; humidity 65.48%, change -5.82 points; precipitation 2.08 mm/day; wind 3.76 m/s.
• Richmond Hill August: mean 21.36 °C, change from July -0.69 °C; max–min span 26.21 °C; humidity 66.86%, change +1.38 points; precipitation 1.79 mm/day; wind 3.76 m/s.
• Richmond Hill September: mean 17.36 °C, change from August -4.00 °C; max–min span 30.06 °C; humidity 70.78%, change +3.92 points; precipitation 1.96 mm/day; wind 4.04 m/s.
• Richmond Hill October: mean 9.72 °C, change from September -7.64 °C; max–min span 31.19 °C; humidity 78.49%, change +7.71 points; precipitation 2.26 mm/day; wind 4.77 m/s.
• Richmond Hill November: mean 3.11 °C, change from October -6.61 °C; max–min span 34.37 °C; humidity 84.02%, change +5.53 points; precipitation 2.14 mm/day; wind 4.99 m/s.
• Richmond Hill December: mean -2.77 °C, change from November -5.88 °C; max–min span 34.93 °C; humidity 89.28%, change +5.26 points; precipitation 1.94 mm/day; wind 5.33 m/s.

Harth retrieved this point climatology from NASA POWER API v2.9.7 for location record 6122091. The ranked fingerprint and transition ledger preserve Richmond Hill'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: Markham, Canada
• Climate Design Data: Etobicoke, Canada
• Climate Design Data: Mississauga, Canada
• Climate Design Data: Barrie, Canada
• All climate & energy design data guidance for Canada
• Daylight & Orientation: Richmond Hill, Canada
• Solar Shading Design: Richmond Hill, Canada
• Sun Path: Richmond Hill, Canada

Sources and method

Location data from the GeoNames CA dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 6122091). Regulatory starting point: Codes Canada and the applicable provincial or territorial 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

• nrc.canada.ca

• power.larc.nasa.gov

• power.larc.nasa.gov