September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Elmira: typically 23.3°C by day, 9.8°C at night, with 104 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 74 — days reach only 0.5°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 | 0.5°C | -9°C | 55 mm | 8.5 | 9 h 25 | 5 | Strong coverage |
| February | 1.9°C | -8.6°C | 47 mm | 7.1 | 10 h 30 | 5 | Strong coverage |
| March | 6.6°C | -4.9°C | 70 mm | 8.3 | 11 h 48 | 5 | Strong coverage |
| April | 14.3°C | 0.8°C | 83 mm | 9.7 | 13 h 17 | 30 | Strong coverage |
| May | 21.3°C | 6.9°C | 79 mm | 10.2 | 14 h 33 | 64 | Strong coverage |
| June | 25.8°C | 12.2°C | 106 mm | 10.1 | 15 h 14 | 73 | Strong coverage |
| July | 28.2°C | 14.7°C | 103 mm | 9.5 | 14 h 58 | 70 | Strong coverage |
| August | 27.4°C | 13.9°C | 97 mm | 8.9 | 13 h 53 | 73 | Strong coverage |
| September | 23.3°C | 9.8°C | 104 mm | 8.2 | 12 h 26 | 74 | Strong coverage |
| October | 16°C | 3.8°C | 88 mm | 10 | 11 h | 40 | Strong coverage |
| November | 8.8°C | -1.1°C | 69 mm | 7.9 | 9 h 44 | 12 | Strong coverage |
| December | 3.1°C | -5.3°C | 66 mm | 8.8 | 9 h 07 | 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 | 22.2°C26 Jan 1950 | -31.1°C5 Jan 1904 | 51 mm29 Jan 1925 | 131 mm1978 · driest 7 mm in 1944 | 131 |
| February | 23.3°C25 Feb 2017 | -29.4°C18 Feb 1979 | 68 mm15 Feb 1984 | 115 mm1984 · driest 2 mm in 1968 | 132 |
| March | 30.0°C29 Mar 1910 | -24.4°C1 Mar 2015 | 90 mm4 Mar 1999 | 211 mm1936 · driest 4 mm in 1910 | 131 |
| April | 33.9°C28 Apr 2009 | -14.4°C1 Apr 1923 | 79 mm18 Apr 1910 | 221 mm1993 · driest 20 mm in 1896 | 130 |
| May | 35.6°C20 May 1996 | -6.1°C1 May 1931 | 64 mm28 May 1946 | 203 mm1943 · driest 15 mm in 1926 | 131 |
| June | 38.9°C27 Jun 1952 | 0.0°C1 Jun 1965 | 93 mm22 Jun 1972 | 282 mm1972 · driest 20 mm in 1970 | 131 |
| July | 40.0°C9 Jul 1936 | 4.4°C20 Jul 1965 | 89 mm22 Jul 2003 | 312 mm2018 · driest 17 mm in 1918 | 131 |
| August | 38.9°C6 Aug 1918 | -0.6°C29 Aug 1982 | 114 mm10 Aug 2003 | 234 mm2023 · driest 13 mm in 1930 | 130 |
| September | 41.7°C3 Sep 1953 | -5.0°C28 Sep 1947 | 116 mm8 Sep 2011 | 271 mm2018 · driest 10 mm in 1941 | 130 |
| October | 33.9°C6 Oct 1951 | -9.4°C20 Oct 1974 | 97 mm1 Oct 2010 | 241 mm1955 · driest 3 mm in 1924 | 130 |
| November | 30.6°C2 Nov 1950 | -17.2°C23 Nov 2018 | 97 mm9 Nov 1996 | 151 mm1985 · driest 6 mm in 1917 | 131 |
| December | 20.6°C7 Dec 1998 | -26.7°C25 Dec 1980 | 65 mm11 Dec 1952 | 150 mm2012 · driest 1 mm in 1928 | 131 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 | 6 |
| February | 0 | 0 | 26 | 2 | 6 |
| March | <1 | 0 | 25 | 2 | 4 |
| April | 2 | <1 | 15 | 3 | <1 |
| May | 9 | 3 | 2 | 3 | 0 |
| June | 18 | 6 | 0 | 4 | 0 |
| July | 26 | 11 | 0 | 3 | 0 |
| August | 23 | 8 | 0 | 3 | 0 |
| September | 12 | 3 | <1 | 3 | 0 |
| October | 2 | 0 | 8 | 3 | <1 |
| November | 0 | 0 | 19 | 2 | 1 |
| December | 0 | 0 | 26 | 2 | 4 |
The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 80); on 2011–2025 it is September (82). 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% | 24% | 5% | 22% | -2.3–4.3°C |
| February | <1% | 23% | 5% | 22% | -1.2–5.5°C |
| March | 4% | 26% | 7% | 29% | 3.8–11.1°C |
| April | 17% | 30% | 9% | 37% | 12.1–17.3°C |
| May | 42% | 34% | 10% | 45% | 18.6–24.1°C |
| June | 64% | 31% | 11% | 36% | 24.1–28.1°C |
| July | 71% | 29% | 10% | 32% | 27.0–30.9°C |
| August | 72% | 27% | 10% | 27% | 25.1–29.6°C |
| September | 58% | 27% | 9% | 29% | 21.2–25.6°C |
| October | 24% | 26% | 7% | 29% | 14.0–19.2°C |
| November | 3% | 26% | 6% | 25% | 6.7–12.0°C |
| December | 0% | 24% | 6% | 24% | 0.0–5.9°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