September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Plattsmouth: typically 26.2°C by day, 11°C at night, with 69 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · September · April
The weakest month is January, scoring 5 against September’s 79 — days reach only 0.6°C, 23° below the 24°C the score treats as ideal, and nights drop to -10.9°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 | 0.6°C | -10.9°C | 18 mm | 3.8 | 9 h 31 | 5 | Good coverage |
| February | 3.9°C | -8°C | 27 mm | 4 | 10 h 34 | 5 | Good coverage |
| March | 10.6°C | -2.7°C | 51 mm | 5.2 | 11 h 49 | 20 | Good coverage |
| April | 17.5°C | 3.5°C | 101 mm | 8.9 | 13 h 15 | 43 | Good coverage |
| May | 23.5°C | 10.2°C | 138 mm | 10.3 | 14 h 27 | 69 | Good coverage |
| June | 28.2°C | 15.8°C | 131 mm | 7.8 | 15 h 06 | 67 | Good coverage |
| July | 30.4°C | 18.1°C | 117 mm | 8.6 | 14 h 51 | 57 | Good coverage |
| August | 29.7°C | 16.9°C | 92 mm | 6.4 | 13 h 48 | 67 | Good coverage |
| September | 26.2°C | 11°C | 69 mm | 5.1 | 12 h 25 | 79 | Good coverage |
| October | 19.6°C | 4.7°C | 49 mm | 5.1 | 11 h 02 | 63 | Good coverage |
| November | 9.9°C | -2.5°C | 38 mm | 4.1 | 9 h 50 | 20 | Good coverage |
| December | 3.2°C | -7.8°C | 21 mm | 3.5 | 9 h 14 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C25 Jan 1944 | -33.3°C12 Jan 1974 | 42 mm3 Jan 1949 | 87 mm1949 · driest 0 mm in 1902 | 103 |
| February | 25.6°C26 Feb 1896 | -33.9°C13 Feb 1905 | 40 mm9 Feb 2001 | 79 mm1971 · driest 0 mm in 1894 | 103 |
| March | 33.3°C30 Mar 1986 | -31.1°C5 Mar 1960 | 55 mm28 Mar 2004 | 152 mm1973 · driest 0 mm in 1918 | 103 |
| April | 37.2°C23 Apr 1989 | -16.1°C3 Apr 1975 | 96 mm25 Apr 2007 | 205 mm1999 · driest 0 mm in 1898 | 104 |
| May | 40.0°C28 May 1895 | -3.3°C2 May 1978 | 127 mm26 May 1987 | 287 mm1987 · driest 0 mm in 1925 | 104 |
| June | 41.1°C10 Jun 1933 | 1.7°C3 Jun 1946 | 128 mm5 Jun 2008 | 446 mm1967 · driest 0 mm in 1896 | 102 |
| July | 46.1°C25 Jul 1936 | 5.0°C5 Jul 1972 | 165 mm26 Jul 1990 | 363 mm1993 · driest 0 mm in 1894 | 102 |
| August | 43.3°C5 Aug 1934 | 2.8°C20 Aug 1950 | 108 mm25 Aug 1975 | 365 mm1954 · driest 0 mm in 1922 | 103 |
| September | 41.7°C7 Sep 1939 | -5.6°C29 Sep 1899 | 152 mm2 Sep 1997 | 321 mm1965 · driest 0 mm in 1895 | 101 |
| October | 35.6°C1 Oct 1994 | -17.8°C30 Oct 1925 | 66 mm25 Oct 1899 | 167 mm2007 · driest 0 mm in 1893 | 101 |
| November | 30.0°C4 Nov 1895 | -25.0°C30 Nov 1964 | 70 mm23 Nov 1931 | 131 mm1975 · driest 0 mm in 1901 | 102 |
| December | 22.2°C6 Dec 1939 | -34.4°C23 Dec 1983 | 64 mm17 Dec 1984 | 106 mm1984 · driest 0 mm in 1938 | 102 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 3 |
| February | 0 | 0 | 26 | <1 | 3 |
| March | 1 | 0 | 21 | 2 | 1 |
| April | 5 | 2 | 8 | 3 | <1 |
| May | 14 | 4 | <1 | 5 | 0 |
| June | 24 | 12 | 0 | 4 | 0 |
| July | 29 | 18 | 0 | 4 | 0 |
| August | 27 | 16 | 0 | 3 | 0 |
| September | 18 | 9 | <1 | 2 | 0 |
| October | 8 | 2 | 7 | 2 | <1 |
| November | <1 | 0 | 20 | 1 | <1 |
| December | 0 | 0 | 28 | <1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 9% | 1% | 4% | -4.0–5.5°C |
| February | 2% | 10% | 2% | 7% | -1.5–8.2°C |
| March | 12% | 15% | 5% | 13% | 5.7–14.3°C |
| April | 34% | 22% | 8% | 27% | 15.0–20.6°C |
| May | 58% | 26% | 12% | 35% | 20.9–26.7°C |
| June | 74% | 25% | 12% | 31% | 26.5–31.1°C |
| July | 80% | 20% | 8% | 22% | 28.9–34.3°C |
| August | 80% | 20% | 9% | 22% | 28.0–32.9°C |
| September | 74% | 18% | 8% | 17% | 23.2–29.0°C |
| October | 49% | 14% | 5% | 10% | 16.6–22.9°C |
| November | 9% | 11% | 3% | 6% | 6.8–13.4°C |
| December | <1% | 10% | 2% | 7% | -0.8–6.4°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