September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Waverly: typically 26.4°C by day, 11.9°C at night, with 75 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 79 — days reach only 4.3°C, 20° 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 | 4.3°C | -6.2°C | 81 mm | 8.4 | 9 h 42 | 5 | Strong coverage |
| February | 6.5°C | -5.2°C | 80 mm | 8 | 10 h 40 | 5 | Strong coverage |
| March | 12°C | -1°C | 102 mm | 9.6 | 11 h 50 | 16 | Strong coverage |
| April | 19.1°C | 4.2°C | 100 mm | 9.8 | 13 h 10 | 49 | Strong coverage |
| May | 23.8°C | 10.4°C | 111 mm | 9.8 | 14 h 17 | 74 | Strong coverage |
| June | 28.3°C | 15.6°C | 107 mm | 9 | 14 h 54 | 69 | Strong coverage |
| July | 30.1°C | 17.5°C | 100 mm | 8.4 | 14 h 40 | 62 | Strong coverage |
| August | 29.5°C | 16.2°C | 87 mm | 7.1 | 13 h 42 | 69 | Strong coverage |
| September | 26.4°C | 11.9°C | 75 mm | 5.8 | 12 h 24 | 79 | Strong coverage |
| October | 19.8°C | 5.2°C | 76 mm | 7.3 | 11 h 06 | 59 | Strong coverage |
| November | 12.7°C | -0.3°C | 69 mm | 7.5 | 9 h 59 | 26 | Strong coverage |
| December | 6.8°C | -3.4°C | 85 mm | 8.9 | 9 h 26 | 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 | 25.6°C21 Jan 1906 | -35.0°C18 Jan 1994 | 97 mm18 Jan 1913 | 352 mm1937 · driest 0 mm in 1986 | 133 |
| February | 26.7°C21 Feb 2018 | -33.9°C10 Feb 1899 | 93 mm19 Feb 2000 | 216 mm2018 · driest 3 mm in 1978 | 132 |
| March | 31.7°C24 Mar 1910 | -24.4°C3 Mar 1980 | 115 mm2 Mar 1997 | 265 mm1997 · driest 1 mm in 1910 | 132 |
| April | 35.0°C18 Apr 1896 | -12.2°C1 Apr 1923 | 79 mm12 Apr 1948 | 182 mm1998 · driest 14 mm in 1986 | 131 |
| May | 36.7°C10 May 1896 | -5.6°C10 May 1966 | 69 mm3 May 2010 | 267 mm2001 · driest 9 mm in 1932 | 132 |
| June | 38.9°C3 Jun 1895 | -0.6°C11 Jun 1972 | 90 mm24 Jun 1909 | 218 mm1941 · driest 8 mm in 1988 | 131 |
| July | 41.7°C28 Jul 1930 | 1.7°C30 Jul 1984 | 73 mm25 Jul 1901 | 308 mm1958 · driest 9 mm in 2012 | 133 |
| August | 40.6°C4 Aug 1930 | -1.7°C21 Aug 1984 | 84 mm5 Aug 1995 | 262 mm1926 · driest 3 mm in 2025 | 131 |
| September | 39.4°C6 Sep 1899 | -3.3°C26 Sep 1928 | 116 mm28 Sep 2024 | 210 mm2024 · driest 13 mm in 1985 | 132 |
| October | 36.1°C2 Oct 1919 | -10.0°C27 Oct 1962 | 106 mm5 Oct 2006 | 227 mm2006 · driest 4 mm in 1963 | 131 |
| November | 30.6°C1 Nov 1927 | -23.3°C30 Nov 1958 | 70 mm6 Nov 2017 | 222 mm1985 · driest 3 mm in 2011 | 131 |
| December | 26.1°C3 Dec 1982 | -32.2°C11 Dec 1917 | 67 mm15 Dec 1948 | 178 mm1990 · driest 0 mm in 1989 | 133 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 3 |
| February | <1 | 0 | 23 | 3 | 2 |
| March | 1 | <1 | 19 | 4 | <1 |
| April | 6 | <1 | 7 | 4 | 0 |
| May | 14 | 4 | <1 | 4 | 0 |
| June | 24 | 11 | 0 | 4 | 0 |
| July | 29 | 17 | 0 | 4 | 0 |
| August | 28 | 15 | 0 | 3 | 0 |
| September | 20 | 7 | <1 | 3 | 0 |
| October | 7 | 1 | 6 | 2 | 0 |
| November | <1 | 0 | 17 | 2 | <1 |
| December | 0 | 0 | 23 | 3 | 2 |
The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 83); on 2011–2025 it is May (84). 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% | 30% | 10% | 35% | 1.0–8.8°C |
| February | 2% | 28% | 9% | 33% | 2.4–10.6°C |
| March | 13% | 33% | 12% | 41% | 9.0–16.8°C |
| April | 33% | 34% | 11% | 44% | 17.0–22.6°C |
| May | 56% | 32% | 12% | 42% | 21.6–27.3°C |
| June | 67% | 31% | 12% | 35% | 26.7–30.8°C |
| July | 70% | 30% | 13% | 34% | 28.5–32.6°C |
| August | 73% | 26% | 11% | 26% | 27.8–31.9°C |
| September | 72% | 22% | 9% | 19% | 24.0–29.9°C |
| October | 47% | 22% | 7% | 19% | 18.0–23.5°C |
| November | 12% | 27% | 9% | 27% | 10.3–15.9°C |
| December | <1% | 28% | 9% | 32% | 2.8–9.8°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