September
September · August · June
United States · 1991–2020
September leads for comfortable weather in Franklin: typically 23.8°C by day, 10.8°C at night, with 99 mm of rain. Based on measured 1991–2020 NOAA station history.
September · August · June
July · August · June
May · September · October
The weakest month is January, scoring 5 against September’s 78 — days reach only 1.4°C, 23° 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 | 1.4°C | -7.7°C | 85 mm | 12.6 | 9 h 29 | 5 | Strong coverage |
| February | 2.7°C | -7.5°C | 68 mm | 10 | 10 h 33 | 5 | Strong coverage |
| March | 7.8°C | -3.8°C | 88 mm | 10.7 | 11 h 48 | 5 | Strong coverage |
| April | 15.7°C | 1.6°C | 106 mm | 11.8 | 13 h 16 | 31 | Strong coverage |
| May | 22°C | 7.6°C | 102 mm | 10.9 | 14 h 29 | 64 | Strong coverage |
| June | 26.4°C | 12.9°C | 125 mm | 10.7 | 15 h 09 | 69 | Strong coverage |
| July | 28.5°C | 15.2°C | 127 mm | 9.9 | 14 h 53 | 66 | Strong coverage |
| August | 27.6°C | 14.4°C | 108 mm | 8.9 | 13 h 50 | 72 | Strong coverage |
| September | 23.8°C | 10.8°C | 99 mm | 8.6 | 12 h 25 | 78 | Strong coverage |
| October | 16.8°C | 4.7°C | 93 mm | 10.9 | 11 h 01 | 42 | Strong coverage |
| November | 9.6°C | -0.4°C | 85 mm | 10.2 | 9 h 48 | 11 | Strong coverage |
| December | 3.7°C | -4.5°C | 85 mm | 11.8 | 9 h 12 | 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 | 22.8°C21 Jan 1906 | -34.4°C13 Jan 1912 | 54 mm25 Jan 1937 | 262 mm1937 · driest 21 mm in 1899 | 128 |
| February | 23.3°C25 Feb 2017 | -32.8°C27 Feb 1963 | 46 mm7 Feb 1904 | 145 mm1909 · driest 10 mm in 1978 | 128 |
| March | 27.8°C25 Mar 1910 | -30.0°C1 Mar 1934 | 56 mm25 Mar 1913 | 193 mm1913 · driest 15 mm in 1910 | 128 |
| April | 33.9°C18 Apr 1914 | -17.8°C1 Apr 1923 | 71 mm28 Apr 1909 | 238 mm2011 · driest 15 mm in 1900 | 129 |
| May | 36.1°C29 May 1911 | -6.7°C10 May 1966 | 76 mm18 May 1928 | 238 mm1946 · driest 13 mm in 1934 | 129 |
| June | 38.3°C29 Jun 1934 | -2.2°C17 Jun 1908 | 114 mm9 Jun 1981 | 266 mm1989 · driest 24 mm in 1991 | 127 |
| July | 41.1°C10 Jul 1936 | 0.6°C15 Jul 1908 | 125 mm19 Jul 1996 | 287 mm1980 · driest 25 mm in 1998 | 129 |
| August | 40.0°C6 Aug 1918 | 2.2°C13 Aug 1930 | 135 mm14 Aug 1994 | 222 mm1964 · driest 20 mm in 1957 | 128 |
| September | 37.8°C1 Sep 1932 | -5.0°C30 Sep 1899 | 102 mm9 Sep 2004 | 240 mm1924 · driest 0 mm in 1903 | 128 |
| October | 32.2°C5 Oct 1922 | -9.4°C29 Oct 1965 | 102 mm16 Oct 1954 | 227 mm1917 · driest 3 mm in 1963 | 126 |
| November | 27.2°C3 Nov 1961 | -17.8°C28 Nov 1904 | 68 mm12 Nov 2022 | 279 mm1985 · driest 16 mm in 1899 | 125 |
| December | 23.3°C4 Dec 1982 | -25.6°C28 Dec 1950 | 57 mm1 Dec 2010 | 184 mm1971 · driest 18 mm in 1965 | 126 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 3 | 9 |
| February | 0 | 0 | 26 | 2 | 7 |
| March | <1 | 0 | 24 | 3 | 4 |
| April | 3 | <1 | 13 | 4 | <1 |
| May | 11 | 3 | 2 | 4 | 0 |
| June | 20 | 7 | 0 | 4 | 0 |
| July | 27 | 11 | 0 | 4 | 0 |
| August | 25 | 8 | 0 | 4 | 0 |
| September | 13 | 3 | 0 | 3 | 0 |
| October | 2 | <1 | 5 | 3 | 0 |
| November | 0 | 0 | 18 | 3 | 2 |
| December | 0 | 0 | 26 | 3 | 6 |
The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 79); on 2011–2025 it is September (86). 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% | 38% | 8% | 50% | -2.0–5.1°C |
| February | <1% | 35% | 7% | 47% | -0.7–5.8°C |
| March | 5% | 36% | 9% | 53% | 4.2–11.8°C |
| April | 18% | 39% | 11% | 53% | 12.0–18.3°C |
| May | 43% | 37% | 12% | 50% | 18.9–24.6°C |
| June | 62% | 34% | 13% | 43% | 24.2–28.1°C |
| July | 69% | 31% | 13% | 37% | 26.9–30.7°C |
| August | 70% | 29% | 11% | 34% | 25.8–29.6°C |
| September | 60% | 28% | 10% | 33% | 21.9–26.4°C |
| October | 29% | 33% | 9% | 42% | 14.2–20.1°C |
| November | 4% | 38% | 9% | 52% | 7.4–12.4°C |
| December | <1% | 38% | 8% | 54% | 0.2–6.7°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