August
August · June · September
Canada · 1991–2020
August leads for comfortable weather in Downsview-Roding-CFB: typically 26.7°C by day, 15.5°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.
August · June · September
July · August · June
May · September · October
The weakest month is January, scoring 5 against August’s 80 — days reach only -1°C, 25° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | -1°C | -8.6°C | 66 mm | 10.5 | 3.7°C | 9 h 15 | 5 | Strong coverage |
| February | -0.1°C | -8.2°C | 56 mm | 8.5 | 2.9°C | 10 h 25 | 5 | Strong coverage |
| March | 5.2°C | -4.1°C | 54 mm | 8.7 | 2.9°C | 11 h 47 | 5 | Strong coverage |
| April | 12.2°C | 1.5°C | 80 mm | 9.9 | 3.8°C | 13 h 22 | 24 | Strong coverage |
| May | 19.7°C | 7.8°C | 83 mm | 9.4 | 7.3°C | 14 h 42 | 60 | Strong coverage |
| June | 25°C | 13.4°C | 97 mm | 9.6 | 14.9°C | 15 h 26 | 79 | Strong coverage |
| July | 27.7°C | 16.2°C | 84 mm | 8.7 | 19.9°C | 15 h 08 | 74 | Strong coverage |
| August | 26.7°C | 15.5°C | 77 mm | 7.6 | 21.2°C | 13 h 59 | 80 | Strong coverage |
| September | 22.6°C | 11.5°C | 79 mm | 7.8 | 19.1°C | 12 h 27 | 79 | Strong coverage |
| October | 14.8°C | 5.5°C | 74 mm | 9.5 | 13.1°C | 10 h 56 | 41 | Strong coverage |
| November | 7.9°C | 0.1°C | 70 mm | 9.3 | 7.5°C | 9 h 36 | 9 | Strong coverage |
| December | 1.9°C | -4.8°C | 66 mm | 9.7 | 4.9°C | 8 h 56 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 15.5°C13 Jan 2005 | -26.0°C14 Jan 1999 | 73 mm11 Jan 2020 | 145 mm2020 · driest 22 mm in 2021 | 28 |
| February | 17.0°C28 Feb 2018 | -26.5°C13 Feb 2016 | 33 mm11 Feb 2009 | 116 mm2008 · driest 18 mm in 1995 | 28 |
| March | 27.5°C22 Mar 2012 | -25.5°C3 Mar 2003 | 37 mm3 Mar 2023 | 128 mm2011 · driest 15 mm in 2015 | 29 |
| April | 30.0°C13 Apr 2023 | -12.0°C5 Apr 2016 | 41 mm3 Apr 2009 | 161 mm2018 · driest 32 mm in 2010 | 29 |
| May | 34.0°C29 May 2006 | -4.5°C13 May 2020 | 71 mm12 May 2000 | 152 mm2000 · driest 20 mm in 2021 | 28 |
| June | 36.0°C30 Jun 2018 | 2.0°C6 Jun 2009 | 65 mm17 Jun 2017 | 196 mm2010 · driest 38 mm in 2020 | 27 |
| July | 36.5°C21 Jul 2011 | 7.0°C5 Jul 2009 | 84 mm27 Jul 2014 | 178 mm2013 · driest 29 mm in 2015 | 27 |
| August | 37.5°C8 Aug 2001 | 5.5°C20 Aug 2000 | 141 mm19 Aug 2005 | 218 mm2005 · driest 13 mm in 2002 | 27 |
| September | 35.0°C10 Sep 2013 | -0.5°C29 Sep 2000 | 68 mm7 Sep 1996 | 181 mm1996 · driest 25 mm in 2004 | 27 |
| October | 31.5°C8 Oct 2007 | -7.5°C31 Oct 2020 | 61 mm5 Oct 1995 | 136 mm1995 · driest 20 mm in 2000 | 27 |
| November | 24.5°C10 Nov 2020 | -16.5°C13 Nov 2019 | 58 mm2 Nov 1999 | 144 mm2003 · driest 11 mm in 2012 | 28 |
| December | 18.0°C5 Dec 2001 | -26.0°C20 Dec 2004 | 38 mm6 Dec 1998 | 116 mm2008 · driest 32 mm in 1999 | 28 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 | 12 |
| February | 0 | 0 | 27 | 2 | 10 |
| March | <1 | 0 | 25 | 2 | 6 |
| April | <1 | 0 | 12 | 3 | 3 |
| May | 6 | 1 | 1 | 3 | 0 |
| June | 15 | 5 | 0 | 3 | 0 |
| July | 24 | 9 | 0 | 3 | 0 |
| August | 22 | 5 | 0 | 3 | 0 |
| September | 10 | 2 | <1 | 3 | 0 |
| October | 1 | <1 | 4 | 2 | <1 |
| November | 0 | 0 | 16 | 2 | 4 |
| December | 0 | 0 | 26 | 2 | 9 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 33% | 6% | 46% | -4.0–1.8°C |
| February | 0% | 29% | 5% | 37% | -3.5–2.7°C |
| March | 2% | 27% | 6% | 35% | 2.8–9.3°C |
| April | 8% | 34% | 10% | 47% | 10.3–14.8°C |
| May | 36% | 29% | 8% | 36% | 17.4–22.9°C |
| June | 59% | 32% | 11% | 42% | 23.4–26.6°C |
| July | 71% | 28% | 8% | 34% | 25.4–30.0°C |
| August | 74% | 25% | 8% | 25% | 25.1–28.0°C |
| September | 55% | 26% | 9% | 30% | 20.8–24.9°C |
| October | 13% | 31% | 7% | 37% | 13.2–16.1°C |
| November | <1% | 31% | 7% | 40% | 4.4–11.1°C |
| December | 0% | 32% | 7% | 39% | -1.1–4.8°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page