September
September · October · May
United States · 1991–2020
September leads for comfortable weather in Sidney: typically 29.1°C by day, 13.7°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.
September · October · May
June · September · August
October · April · March
The weakest month is January, scoring 5 against September’s 71 — days reach only 8.8°C, 15° below the 24°C the score treats as ideal, and nights drop to -4.1°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 | 8.8°C | -4.1°C | 91 mm | 7.3 | 9 h 58 | 5 | Strong coverage |
| February | 11.8°C | -2.3°C | 94 mm | 7.1 | 10 h 49 | 16 | Strong coverage |
| March | 16.8°C | 2.1°C | 126 mm | 8.8 | 11 h 51 | 35 | Strong coverage |
| April | 22.4°C | 7.1°C | 141 mm | 8.1 | 13 h 03 | 61 | Strong coverage |
| May | 26.3°C | 12.5°C | 146 mm | 9.7 | 14 h 03 | 66 | Strong coverage |
| June | 30.9°C | 17.3°C | 81 mm | 6.6 | 14 h 35 | 63 | Strong coverage |
| July | 33.1°C | 19.3°C | 110 mm | 7.2 | 14 h 23 | 48 | Strong coverage |
| August | 32.7°C | 18.2°C | 97 mm | 6.7 | 13 h 31 | 53 | Strong coverage |
| September | 29.1°C | 13.7°C | 88 mm | 5.5 | 12 h 22 | 71 | Strong coverage |
| October | 23°C | 6.8°C | 103 mm | 7.6 | 11 h 13 | 68 | Strong coverage |
| November | 15.9°C | 1.5°C | 125 mm | 7.7 | 10 h 13 | 32 | Strong coverage |
| December | 10.1°C | -2.5°C | 116 mm | 7.9 | 9 h 43 | 7 | 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 | 27.2°C30 Jan 1987 | -26.1°C20 Jan 1985 | 99 mm13 Jan 2013 | 200 mm2024 · driest 11 mm in 1970 | 64 |
| February | 30.0°C20 Feb 1986 | -25.0°C3 Feb 1985 | 104 mm23 Feb 1979 | 266 mm1989 · driest 15 mm in 2017 | 65 |
| March | 33.9°C12 Mar 1967 | -16.7°C7 Mar 1967 | 165 mm22 Mar 2013 | 275 mm1975 · driest 37 mm in 1971 | 64 |
| April | 35.6°C20 Apr 1987 | -6.7°C8 Apr 2007 | 163 mm5 Apr 2025 | 364 mm2025 · driest 24 mm in 1987 | 62 |
| May | 37.2°C29 May 1926 | -1.1°C4 May 1976 | 115 mm27 May 2000 | 360 mm2000 · driest 8 mm in 2005 | 65 |
| June | 42.2°C29 Jun 2012 | 3.9°C3 Jun 1969 | 87 mm11 Jun 1924 | 209 mm1924 · driest 3 mm in 2005 | 64 |
| July | 45.0°C15 Jul 1966 | 7.8°C4 Jul 1968 | 152 mm16 Jul 1985 | 324 mm2024 · driest 28 mm in 1986 | 65 |
| August | 44.4°C16 Aug 2007 | 6.1°C29 Aug 1965 | 114 mm30 Aug 1978 | 312 mm1975 · driest 15 mm in 2025 | 64 |
| September | 41.7°C1 Sep 2000 | -1.1°C28 Sep 1993 | 107 mm30 Sep 2021 | 294 mm1965 · driest 0 mm in 2004 | 66 |
| October | 35.6°C6 Oct 2006 | -7.2°C27 Oct 1994 | 148 mm6 Oct 1998 | 358 mm1984 · driest 0 mm in 1975 | 66 |
| November | 31.1°C11 Nov 1989 | -15.0°C13 Nov 1986 | 123 mm5 Nov 1994 | 299 mm2011 · driest 3 mm in 1989 | 64 |
| December | 26.7°C1 Dec 1970 | -25.0°C22 Dec 1989 | 120 mm3 Dec 1982 | 404 mm1982 · driest 10 mm in 2025 | 64 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 1 |
| February | <1 | 0 | 19 | 3 | 1 |
| March | 4 | <1 | 12 | 4 | <1 |
| April | 11 | 2 | 3 | 4 | <1 |
| May | 21 | 7 | <1 | 5 | 0 |
| June | 28 | 20 | 0 | 3 | 0 |
| July | 31 | 26 | 0 | 3 | 0 |
| August | 30 | 24 | 0 | 3 | 0 |
| September | 24 | 14 | <1 | 3 | 0 |
| October | 12 | 3 | 4 | 3 | 0 |
| November | 2 | 0 | 14 | 4 | <1 |
| December | <1 | 0 | 22 | 4 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was October (scoring 76); on 2011–2025 it is September (81). 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 | 5% | 22% | 9% | 21% | 5.7–12.2°C |
| February | 13% | 24% | 10% | 25% | 8.4–15.2°C |
| March | 29% | 27% | 13% | 29% | 13.7–20.5°C |
| April | 55% | 27% | 13% | 30% | 20.1–24.8°C |
| May | 67% | 29% | 14% | 33% | 24.0–28.6°C |
| June | 78% | 22% | 11% | 23% | 28.9–33.0°C |
| July | 78% | 22% | 10% | 20% | 31.2–35.3°C |
| August | 80% | 20% | 9% | 17% | 30.1–35.0°C |
| September | 79% | 20% | 9% | 17% | 26.9–31.5°C |
| October | 63% | 20% | 9% | 21% | 21.3–25.0°C |
| November | 26% | 23% | 12% | 21% | 13.3–19.1°C |
| December | 6% | 23% | 11% | 26% | 8.2–14.1°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