September
September · June · May
United States · 1991–2020
September leads for comfortable weather in Browns Canon: typically 24.5°C by day, 3.6°C at night, with 17 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · May
July · August · June
May · October · September
The weakest month is January, scoring 5 against September’s 77 — days reach only 6.5°C, 17° below the 24°C the score treats as ideal, and nights drop to -10.8°C.
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 | 6.5°C | -10.8°C | 7 mm | 1.4 | 9 h 44 | 5 | Good coverage |
| February | 8.2°C | -9.1°C | 8 mm | 1.9 | 10 h 41 | 5 | Good coverage |
| March | 12.1°C | -5.8°C | 18 mm | 3.5 | 11 h 50 | 23 | Good coverage |
| April | 15.8°C | -2.4°C | 27 mm | 4.1 | 13 h 09 | 41 | Good coverage |
| May | 21.6°C | 2.3°C | 25 mm | 3.6 | 14 h 15 | 69 | Good coverage |
| June | 27.3°C | 5.8°C | 13 mm | 2.7 | 14 h 51 | 73 | Good coverage |
| July | 29.8°C | 9.2°C | 35 mm | 5.9 | 14 h 37 | 68 | Good coverage |
| August | 28.2°C | 8.2°C | 48 mm | 8.8 | 13 h 40 | 67 | Good coverage |
| September | 24.5°C | 3.6°C | 17 mm | 3.7 | 12 h 23 | 77 | Good coverage |
| October | 18.5°C | -1.7°C | 22 mm | 3.3 | 11 h 07 | 52 | Good coverage |
| November | 11.3°C | -6.7°C | 9 mm | 2 | 10 h 01 | 19 | Good coverage |
| December | 6°C | -10.4°C | 8 mm | 2.2 | 9 h 29 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.3°C7 Jan 1969 | -37.2°C2 Jan 1919 | 25 mm11 Jan 1905 | 45 mm1905 · driest 0 mm in 1991 | 87 |
| February | 21.7°C27 Feb 1932 | -36.1°C1 Feb 1951 | 42 mm27 Feb 1911 | 103 mm1911 · driest 0 mm in 1970 | 88 |
| March | 25.0°C20 Mar 2004 | -29.4°C3 Mar 2002 | 34 mm30 Mar 1953 | 81 mm1944 · driest 0 mm in 1989 | 87 |
| April | 27.8°C25 Apr 2012 | -21.7°C8 Apr 1957 | 64 mm27 Apr 1932 | 139 mm1900 · driest 0 mm in 1993 | 89 |
| May | 33.9°C20 May 2005 | -10.6°C3 May 1944 | 44 mm7 May 1938 | 96 mm1957 · driest 0 mm in 2004 | 89 |
| June | 36.7°C26 Jun 1916 | -5.0°C6 Jun 1937 | 63 mm4 Jun 1949 | 99 mm1913 · driest 0 mm in 1920 | 91 |
| July | 39.4°C21 Jul 2005 | -1.1°C6 Jul 1902 | 63 mm9 Jul 1949 | 100 mm1911 · driest 5 mm in 2001 | 90 |
| August | 37.8°C1 Aug 1902 | -0.6°C25 Aug 1900 | 43 mm25 Aug 1992 | 151 mm1955 · driest 0 mm in 1900 | 87 |
| September | 34.4°C2 Sep 2002 | -10.0°C27 Sep 1908 | 41 mm5 Sep 1909 | 70 mm1938 · driest 0 mm in 2010 | 85 |
| October | 29.4°C21 Oct 2003 | -20.0°C25 Oct 1932 | 51 mm21 Oct 1906 | 110 mm1959 · driest 0 mm in 1934 | 85 |
| November | 26.7°C5 Nov 1937 | -28.9°C25 Nov 1931 | 41 mm12 Nov 1909 | 80 mm1909 · driest 0 mm in 2012 | 88 |
| December | 21.1°C8 Dec 1900 | -33.3°C22 Dec 1990 | 31 mm1 Dec 1913 | 74 mm1913 · driest 0 mm in 1931 | 88 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | <1 | 2 |
| February | 0 | 0 | 26 | <1 | 2 |
| March | <1 | 0 | 27 | <1 | 2 |
| April | 1 | 0 | 22 | <1 | 3 |
| May | 8 | <1 | 8 | <1 | <1 |
| June | 20 | 9 | <1 | <1 | 0 |
| July | 28 | 15 | 0 | <1 | 0 |
| August | 26 | 9 | <1 | 1 | 0 |
| September | 16 | 2 | 5 | <1 | 0 |
| October | 4 | 0 | 20 | <1 | 1 |
| November | 0 | 0 | 26 | <1 | 2 |
| December | 0 | 0 | 29 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 6% | <1% | 2% | 2.9–9.1°C |
| February | <1% | 8% | 2% | 3% | 4.2–11.1°C |
| March | 4% | 11% | 2% | 6% | 8.6–14.3°C |
| April | 26% | 14% | 3% | 10% | 13.1–18.6°C |
| May | 62% | 13% | 3% | 10% | 18.4–23.1°C |
| June | 83% | 13% | 2% | 10% | 24.0–28.5°C |
| July | 77% | 23% | 4% | 28% | 27.4–30.9°C |
| August | 75% | 25% | 3% | 25% | 26.3–29.5°C |
| September | 81% | 13% | 2% | 7% | 22.7–26.2°C |
| October | 49% | 10% | 3% | 6% | 15.8–21.2°C |
| November | 5% | 8% | 1% | 2% | 8.3–14.8°C |
| December | 0% | 7% | 1% | 2% | 3.4–9.4°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