September
September · June · August
Canada · 1991–2020
September leads for comfortable weather in Cascade: typically 23.5°C by day, 8.1°C at night, with 29 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · September
September · May · June
The weakest month is January, scoring 5 against September’s 84 — days reach only -0.5°C, 24° 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 | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -0.5°C | -5.5°C | 50 mm | 11 | 8 h 39 | 5 | Strong coverage |
| February | 3.3°C | -4.6°C | 37 mm | 8.3 | 10 h 04 | 5 | Strong coverage |
| March | 9.4°C | -1.4°C | 45 mm | 9.9 | 11 h 43 | 15 | Strong coverage |
| April | 15.2°C | 2°C | 47 mm | 9.6 | 13 h 38 | 40 | Strong coverage |
| May | 20.6°C | 6.2°C | 66 mm | 11 | 15 h 15 | 61 | Strong coverage |
| June | 24.1°C | 9.6°C | 66 mm | 9.6 | 16 h 10 | 80 | Strong coverage |
| July | 29.6°C | 12.8°C | 30 mm | 5.1 | 15 h 49 | 75 | Strong coverage |
| August | 29.6°C | 12.3°C | 20 mm | 3.6 | 14 h 23 | 76 | Strong coverage |
| September | 23.5°C | 8.1°C | 29 mm | 5.7 | 12 h 32 | 84 | Strong coverage |
| October | 13.5°C | 2.5°C | 46 mm | 8.6 | 10 h 42 | 36 | Strong coverage |
| November | 4.3°C | -1.5°C | 55 mm | 11.7 | 9 h 04 | 5 | Strong coverage |
| December | -0.7°C | -5.3°C | 60 mm | 12.3 | 8 h 15 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 11.0°C30 Jan 1989 | -28.0°C13 Jan 2024 | 21 mm4 Jan 2015 | 117 mm2020 · driest 7 mm in 1985 | 39 |
| February | 15.0°C27 Feb 2016 | -26.5°C3 Feb 1989 | 18 mm28 Feb 1991 | 61 mm2017 · driest 6 mm in 2005 | 40 |
| March | 24.0°C31 Mar 1992 | -18.5°C3 Mar 2019 | 21 mm15 Mar 2015 | 95 mm2012 · driest 6 mm in 2021 | 40 |
| April | 31.5°C27 Apr 1987 | -6.0°C11 Apr 1997 | 24 mm19 Apr 1997 | 109 mm1993 · driest 15 mm in 2020 | 39 |
| May | 37.5°C31 May 1986 | -3.0°C5 May 1999 | 46 mm26 May 1998 | 154 mm2020 · driest 13 mm in 2021 | 36 |
| June | 44.0°C29 Jun 2021 | 1.5°C1 Jun 2000 | 59 mm28 Jun 1992 | 141 mm2022 · driest 8 mm in 2015 | 39 |
| July | 41.0°C23 Jul 2006 | 5.5°C5 Jul 2000 | 39 mm6 Jul 2009 | 89 mm1993 · driest 0 mm in 2021 | 38 |
| August | 39.6°C15 Aug 2023 | 3.5°C23 Aug 1992 | 25 mm22 Aug 2004 | 81 mm2004 · driest 0 mm in 2012 | 39 |
| September | 39.0°C2 Sep 1988 | -8.0°C30 Sep 2014 | 33 mm16 Sep 1988 | 90 mm2019 · driest 0 mm in 1991 | 39 |
| October | 29.0°C2 Oct 1992 | -11.0°C28 Oct 1991 | 30 mm13 Oct 2016 | 145 mm2016 · driest 0 mm in 2002 | 39 |
| November | 17.0°C2 Nov 1987 | -25.0°C28 Nov 1985 | 24 mm27 Nov 1996 | 92 mm1992 · driest 10 mm in 1993 | 40 |
| December | 11.0°C1 Dec 2021 | -28.5°C29 Dec 1990 | 33 mm14 Dec 2002 | 111 mm2002 · driest 6 mm in 2011 | 39 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 1 | 8 |
| February | 0 | 0 | 24 | <1 | 6 |
| March | 0 | 0 | 20 | <1 | 3 |
| April | 1 | 0 | 9 | <1 | <1 |
| May | 7 | 2 | 1 | 2 | 0 |
| June | 12 | 4 | 0 | 2 | 0 |
| July | 24 | 15 | 0 | <1 | 0 |
| August | 24 | 15 | 0 | <1 | 0 |
| September | 11 | 4 | <1 | <1 | 0 |
| October | <1 | 0 | 8 | 1 | <1 |
| November | 0 | 0 | 19 | 1 | 5 |
| December | 0 | 0 | 26 | 1 | 10 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 36% | 3% | 46% | -2.8–1.5°C |
| February | 0% | 28% | 2% | 36% | 0.7–5.7°C |
| March | 2% | 30% | 3% | 37% | 7.5–11.7°C |
| April | 18% | 30% | 3% | 36% | 13.2–17.4°C |
| May | 44% | 35% | 6% | 44% | 17.8–23.0°C |
| June | 63% | 31% | 6% | 40% | 21.9–27.2°C |
| July | 83% | 16% | 3% | 13% | 26.7–32.8°C |
| August | 86% | 12% | 2% | 10% | 27.6–31.3°C |
| September | 68% | 19% | 2% | 19% | 20.6–26.5°C |
| October | 13% | 26% | 3% | 37% | 11.9–16.2°C |
| November | 0% | 40% | 4% | 56% | 2.5–6.8°C |
| December | 0% | 40% | 4% | 55% | -3.8–1.1°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