September
September · June · August
80climate match
United States · 1991–2020
Best time to visit
Sidney.
September leads for comfortable weather in Sidney: typically 26°C by day, 8.2°C at night, with 25 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high26°C
Typical low8.2°C
Rain in September25 mm
August
August · July · June
68climate match
September
September · May · October
77climate match
The weakest month is January, scoring 5 against September’s 80 — days reach only 5.6°C, 18° below the 24°C the score treats as ideal, and nights drop to -9.5°C.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
55.6° / -9.5°
Feb
55.9° / -9°
Mar
2512.1° / -4.6°
Apr
4115.8° / -0.6°
May
6321.1° / 5.1°
Jun
7028.1° / 11°
Jul
6632.5° / 14.9°
Aug
7030.9° / 13.4°
Sep
8026° / 8.2°
Oct
5317.7° / 0.6°
Nov
2111° / -5.3°
Dec
55.1° / -9.8°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 5.6°C | -9.5°C | 3 mm | 0.9 | 9 h 31 | 5 | Good coverage |
| February | 5.9°C | -9°C | 7 mm | 1.6 | 10 h 33 | 5 | Good coverage |
| March | 12.1°C | -4.6°C | 15 mm | 3.4 | 11 h 48 | 25 | Good coverage |
| April | 15.8°C | -0.6°C | 46 mm | 6 | 13 h 15 | 41 | Good coverage |
| May | 21.1°C | 5.1°C | 68 mm | 8.2 | 14 h 28 | 63 | Good coverage |
| June | 28.1°C | 11°C | 72 mm | 8 | 15 h 07 | 70 | Good coverage |
| July | 32.5°C | 14.9°C | 54 mm | 6.2 | 14 h 52 | 66 | Good coverage |
| August | 30.9°C | 13.4°C | 47 mm | 5.8 | 13 h 49 | 70 | Good coverage |
| September | 26°C | 8.2°C | 25 mm | 4.1 | 12 h 25 | 80 | Good coverage |
| October | 17.7°C | 0.6°C | 20 mm | 3.6 | 11 h 02 | 53 | Good coverage |
| November | 11°C | -5.3°C | 9 mm | 2 | 9 h 49 | 21 | Good coverage |
| December | 5.1°C | -9.8°C | 6 mm | 1.3 | 9 h 13 | 5 | Good coverage |
What has changed
Sidney runs +1.8°C
on the 1961–1990 baseline.
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.
Jan
+2.1
Feb
-1.2
Mar
+3.3
Apr
+1.2
May
+0.5
Jun
+2.8
Jul
+1.8
Aug
+1.6
Sep
+3.5
Oct
+0.7
Nov
+2.7
Dec
+2.4
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C5 Jan 2012 | -34.4°C19 Jan 1963 | 15 mm10 Jan 1963 | 39 mm1963 · driest 0 mm in 2010 | 69 |
| February | 24.4°C2 Feb 2020 | -34.9°C14 Feb 2021 | 18 mm19 Feb 1953 | 29 mm1953 · driest 0 mm in 1954 | 69 |
| March | 33.3°C25 Mar 2026 | -31.7°C3 Mar 1960 | 58 mm22 Mar 1979 | 114 mm1979 · driest 2 mm in 1972 | 69 |
| April | 33.3°C24 Apr 2012 | -22.8°C2 Apr 1975 | 59 mm17 Apr 2015 | 140 mm2015 · driest 4 mm in 2020 | 69 |
| May | 36.7°C22 May 2012 | -8.9°C9 May 2002 | 79 mm9 May 2015 | 201 mm2015 · driest 5 mm in 1966 | 69 |
| June | 43.9°C26 Jun 2012 | -2.2°C3 Jun 1954 | 115 mm11 Jun 1970 | 267 mm1965 · driest 6 mm in 2021 | 68 |
| July | 41.7°C16 Jul 2006 | 2.8°C30 Jul 1971 | 82 mm6 Jul 2010 | 147 mm1982 · driest 2 mm in 2017 | 69 |
| August | 40.0°C8 Aug 1969 | 1.7°C23 Aug 2015 | 85 mm29 Aug 2011 | 190 mm1968 · driest 2 mm in 1970 | 68 |
| September | 38.9°C10 Sep 2021 | -10.6°C30 Sep 1985 | 53 mm29 Sep 2014 | 130 mm1950 · driest 0 mm in 2024 | 68 |
| October | 33.9°C6 Oct 2007 | -22.7°C27 Oct 2020 | 69 mm20 Oct 1963 | 109 mm1969 · driest 0 mm in 2019 | 68 |
| November | 27.2°C2 Nov 2025 | -25.5°C13 Nov 2014 | 31 mm21 Nov 1979 | 50 mm1983 · driest 0 mm in 2007 | 68 |
| December | 25.6°C2 Dec 2021 | -30.6°C21 Dec 1998 | 24 mm25 Dec 1982 | 35 mm1973 · driest 0 mm in 1976 | 67 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 30 | 0 |
| February | 0 | 0 | 28 | 0 |
| March | 1 | 0 | 27 | <1 |
| April | 4 | <1 | 17 | 1 |
| May | 10 | 3 | 5 | 2 |
| June | 22 | 12 | <1 | 2 |
| July | 29 | 23 | 0 | 2 |
| August | 27 | 19 | 0 | 2 |
| September | 19 | 10 | 1 | <1 |
| October | 6 | 1 | 14 | <1 |
| November | <1 | 0 | 27 | 0 |
| December | 0 | 0 | 30 | 0 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 6% | <1% | 2% | -0.1–7.5°C |
| February | 3% | 8% | <1% | 4% | 1.9–10.0°C |
| March | 13% | 13% | 2% | 9% | 6.2–14.6°C |
| April | 29% | 20% | 5% | 20% | 12.2–18.2°C |
| May | 47% | 29% | 9% | 36% | 17.9–23.2°C |
| June | 68% | 27% | 8% | 30% | 24.2–30.6°C |
| July | 76% | 23% | 7% | 23% | 29.6–33.8°C |
| August | 80% | 19% | 5% | 14% | 28.5–32.7°C |
| September | 73% | 14% | 3% | 11% | 22.2–28.1°C |
| October | 43% | 12% | 2% | 8% | 15.1–20.7°C |
| November | 11% | 8% | <1% | 3% | 6.6–14.0°C |
| December | 1% | 7% | <1% | 3% | 1.1–8.4°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
Nearby, measured,
and named.
- Place identity
- GeoNames 5699552
- NOAA station
- USW00024030 · SIDNEY MUNI AP
- Station distance
- 4.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 22 usable years
- Daylight
- Calculated from latitude 41.14°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.