September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Kinnelon: typically 24.1°C by day, 10.7°C at night, with 128 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
May · September · October
The weakest month is January, scoring 5 against September’s 75 — days reach only 2.5°C, 21° 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 | 2.5°C | -7.8°C | 99 mm | 8.5 | 9 h 32 | 5 | Strong coverage |
| February | 4.1°C | -7.3°C | 71 mm | 6.6 | 10 h 34 | 5 | Strong coverage |
| March | 8.5°C | -3.1°C | 113 mm | 8.6 | 11 h 49 | 5 | Strong coverage |
| April | 15.3°C | 2.7°C | 97 mm | 8.6 | 13 h 15 | 35 | Strong coverage |
| May | 21.4°C | 8.4°C | 93 mm | 9.5 | 14 h 27 | 66 | Strong coverage |
| June | 25.8°C | 13.3°C | 120 mm | 9.2 | 15 h 06 | 73 | Strong coverage |
| July | 28.6°C | 16.1°C | 104 mm | 8.9 | 14 h 51 | 68 | Strong coverage |
| August | 27.8°C | 15.1°C | 103 mm | 8 | 13 h 48 | 73 | Strong coverage |
| September | 24.1°C | 10.7°C | 128 mm | 7.5 | 12 h 25 | 75 | Strong coverage |
| October | 17.6°C | 4.9°C | 117 mm | 7.6 | 11 h 02 | 45 | Strong coverage |
| November | 10.9°C | -0.1°C | 92 mm | 6.8 | 9 h 50 | 18 | Strong coverage |
| December | 5.3°C | -4.1°C | 120 mm | 8.3 | 9 h 14 | 5 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C26 Jan 1950 | -32.2°C14 Jan 1912 | 104 mm10 Jan 2024 | 304 mm1979 · driest 0 mm in 1910 | 133 |
| February | 24.4°C22 Feb 2018 | -31.7°C16 Feb 1943 | 70 mm28 Feb 1958 | 217 mm2008 · driest 2 mm in 1919 | 133 |
| March | 29.4°C31 Mar 1998 | -23.3°C7 Mar 2003 | 128 mm11 Mar 2011 | 317 mm2010 · driest 0 mm in 1915 | 133 |
| April | 33.9°C18 Apr 2002 | -14.4°C1 Apr 1923 | 117 mm16 Apr 2007 | 276 mm1983 · driest 3 mm in 1896 | 133 |
| May | 35.6°C9 May 1936 | -5.0°C1 May 1922 | 99 mm12 May 1981 | 315 mm1989 · driest 6 mm in 1903 | 133 |
| June | 37.2°C29 Jun 1934 | -1.7°C10 Jun 1957 | 111 mm30 Jun 1973 | 319 mm1972 · driest 5 mm in 1908 | 134 |
| July | 40.6°C9 Jul 1936 | 2.2°C12 Jul 1945 | 115 mm22 Jul 1946 | 339 mm1897 · driest 12 mm in 1910 | 133 |
| August | 37.8°C1 Aug 1933 | 0.0°C25 Aug 1940 | 186 mm28 Aug 1971 | 430 mm1955 · driest 11 mm in 1924 | 133 |
| September | 37.8°C3 Sep 1953 | -5.0°C22 Sep 1904 | 197 mm19 Sep 1894 | 319 mm1934 · driest 2 mm in 2024 | 133 |
| October | 32.2°C5 Oct 1941 | -12.2°C28 Oct 1936 | 142 mm9 Oct 2005 | 427 mm2005 · driest 0 mm in 1905 | 133 |
| November | 27.2°C1 Nov 2024 | -18.3°C26 Nov 1938 | 109 mm9 Nov 1972 | 291 mm1972 · driest 2 mm in 1901 | 133 |
| December | 22.8°C8 Dec 1998 | -28.3°C30 Dec 1917 | 114 mm18 Dec 2023 | 255 mm1957 · driest 8 mm in 1908 | 133 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 3 |
| February | 0 | 0 | 25 | 3 | 3 |
| March | <1 | 0 | 23 | 3 | 2 |
| April | 2 | <1 | 9 | 3 | <1 |
| May | 8 | 2 | <1 | 3 | 0 |
| June | 19 | 5 | 0 | 4 | 0 |
| July | 27 | 11 | 0 | 3 | 0 |
| August | 25 | 9 | 0 | 3 | 0 |
| September | 14 | 3 | <1 | 3 | 0 |
| October | 2 | <1 | 6 | 3 | 0 |
| November | <1 | 0 | 17 | 3 | <1 |
| December | 0 | 0 | 24 | 4 | 2 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 82); on 2011–2025 it is September (87). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 26% | 9% | 28% | -1.1–5.6°C |
| February | <1% | 25% | 9% | 25% | 0.0–6.6°C |
| March | 4% | 26% | 10% | 29% | 5.3–12.1°C |
| April | 19% | 29% | 10% | 36% | 12.6–17.3°C |
| May | 49% | 30% | 10% | 37% | 18.9–23.8°C |
| June | 67% | 29% | 11% | 34% | 23.8–27.6°C |
| July | 72% | 28% | 11% | 29% | 26.6–30.1°C |
| August | 73% | 27% | 11% | 27% | 25.7–29.4°C |
| September | 65% | 23% | 10% | 22% | 21.8–25.9°C |
| October | 30% | 21% | 9% | 18% | 15.6–20.1°C |
| November | 5% | 23% | 9% | 23% | 8.3–13.4°C |
| December | <1% | 24% | 11% | 25% | 1.6–7.1°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