United States · 1991–2020

Best time to visit
Sidney.

September leads for comfortable weather in Sidney: typically 25.4°C by day, 12.3°C at night, with 73 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.4°C

Typical low12.3°C

Rain in September73 mm

Comfort

September

September · August · May

83climate match

Beach

August

August · July · June

77climate match

Outdoors

October

October · September · May

81climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 0.3°C, 24° below the 24°C the score treats as ideal.

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

50.3° / -10.1°

Feb

53.4° / -7.6°

Mar

2210.5° / -1.9°

Apr

4616.9° / 4.1°

May

6822.5° / 10.7°

Jun

6827.7° / 16.4°

Jul

5929.8° / 18.7°

Aug

6928.9° / 17.4°

Sep

8325.4° / 12.3°

Oct

6018.9° / 6°

Nov

2310° / -1.2°

Dec

52.6° / -7.1°

Monthly climate evidence for Sidney — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.3°C	-10.1°C	19 mm	3.7	9 h 33	5	Strong coverage
February	3.4°C	-7.6°C	27 mm	4.1	10 h 35	5	Strong coverage
March	10.5°C	-1.9°C	44 mm	5.3	11 h 49	22	Strong coverage
April	16.9°C	4.1°C	83 mm	8	13 h 14	46	Strong coverage
May	22.5°C	10.7°C	132 mm	9.7	14 h 26	68	Strong coverage
June	27.7°C	16.4°C	124 mm	8.6	15 h 05	68	Strong coverage
July	29.8°C	18.7°C	117 mm	7.4	14 h 49	59	Strong coverage
August	28.9°C	17.4°C	87 mm	6.7	13 h 47	69	Strong coverage
September	25.4°C	12.3°C	73 mm	5.9	12 h 25	83	Strong coverage
October	18.9°C	6°C	68 mm	5.8	11 h 03	60	Strong coverage
November	10°C	-1.2°C	40 mm	4.4	9 h 51	23	Strong coverage
December	2.6°C	-7.1°C	30 mm	3.9	9 h 16	5	Strong coverage

Records at SIDNEY 1SSE, 1895–2018
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C24 Jan 1981	-30.0°C29 Jan 1966	32 mm3 Jan 1971	58 mm1973 · driest 0 mm in 1954	73
February	27.8°C29 Feb 1972	-33.3°C11 Feb 1899	54 mm19 Feb 1954	94 mm2001 · driest 1 mm in 2006	72
March	32.8°C29 Mar 1986	-27.2°C1 Mar 1962	44 mm31 Mar 1973	184 mm1973 · driest 1 mm in 2014	72
April	35.6°C22 Apr 1989	-13.3°C3 Apr 1975	75 mm17 Apr 1978	208 mm1984 · driest 10 mm in 2018	74
May	37.8°C29 May 1989	-2.2°C3 May 1976	114 mm26 May 1987	338 mm1996 · driest 29 mm in 1989	72
June	40.6°C27 Jun 1980	5.0°C4 Jun 1998	103 mm5 Jun 2008	295 mm2008 · driest 22 mm in 2002	74
July	42.8°C21 Jul 1974	6.7°C30 Jul 1971	222 mm19 Jul 1965	411 mm1965 · driest 6 mm in 1974	73
August	39.4°C14 Aug 1988	5.6°C20 Aug 1950	133 mm9 Aug 2015	422 mm1977 · driest 12 mm in 1984	74
September	38.9°C3 Sep 2000	-2.2°C22 Sep 1995	106 mm9 Sep 1989	245 mm1905 · driest 15 mm in 2011	71
October	34.4°C1 Oct 1976	-10.0°C27 Oct 1997	109 mm15 Oct 2007	190 mm2007 · driest 0 mm in 1952	72
November	28.9°C17 Nov 1895	-22.8°C30 Nov 1964	56 mm4 Nov 2003	127 mm1971 · driest 0 mm in 1949	71
December	22.2°C23 Dec 1964	-31.7°C23 Dec 1989	53 mm13 Dec 2015	128 mm2015 · driest 0 mm in 1950	72

Typical days per month at SIDNEY 1SSE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	3
February	0	0	25	<1	3
March	1	0	21	1	2
April	4	<1	7	3	<1
May	12	3	<1	4	0
June	23	10	0	4	0
July	28	15	0	3	0
August	26	13	0	2	0
September	17	6	<1	2	0
October	6	1	4	2	<1
November	<1	0	18	1	<1
December	0	0	29	1	3

How often, not how much — every day in SIDNEY 1SSE’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	11%	2%	5%	-2.5–5.3°C
February	2%	14%	2%	11%	-1.5–8.4°C
March	13%	20%	6%	17%	6.4–14.4°C
April	34%	26%	9%	30%	14.7–21.4°C
May	56%	30%	13%	37%	21.3–26.3°C
June	71%	28%	12%	33%	26.2–31.2°C
July	76%	24%	11%	24%	28.4–33.4°C
August	76%	24%	10%	25%	27.5–32.5°C
September	72%	22%	9%	21%	23.5–28.9°C
October	46%	18%	6%	17%	17.2–21.9°C
November	9%	15%	4%	11%	6.4–13.3°C
December	<1%	13%	3%	8%	-1.0–6.5°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.

1896Each stripe is one year’s mean temperature against the 63-year average. Warmest: 1987. Coolest: 1996.2017

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4876353
NOAA station: USC00137669 · SIDNEY 1SSE
Station distance: 1.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 40.75°, 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.

These places read the same station, so their numbers are identical — distance from SIDNEY 1SSE is what differs

Hamburg→Riverton→Thurman→Randolph→Anderson→

Or put two places side by side: Sidney vs Hamburg

Best time to visitSidney.