United States · 1991–2020

Best time to visit
Shannon City.

September leads for comfortable weather in Shannon City: typically 24.8°C by day, 11.6°C at night, with 102 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.8°C

Typical low11.6°C

Rain in September102 mm

Comfort

September

September · June · August

78climate match

Beach

July

July · August · June

72climate match

Outdoors

October

October · September · May

75climate match

The weakest month is January, scoring 5 against September’s 78 — days reach only -0.7°C, 25° 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

5-0.7° / -11°

Feb

51.9° / -9.2°

Mar

149.4° / -2.8°

Apr

4016.5° / 3°

May

6022° / 9.9°

Jun

6727.3° / 15.7°

Jul

6229.4° / 17.9°

Aug

6728.3° / 16.5°

Sep

7824.8° / 11.6°

Oct

5417.9° / 4.7°

Nov

169.1° / -2.5°

Dec

52.2° / -8.1°

Monthly climate evidence for Shannon City — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.7°C	-11°C	14 mm	2.7	9 h 32	5	Strong coverage
February	1.9°C	-9.2°C	23 mm	3.7	10 h 34	5	Strong coverage
March	9.4°C	-2.8°C	56 mm	6.4	11 h 49	14	Strong coverage
April	16.5°C	3°C	92 mm	9	13 h 14	40	Strong coverage
May	22°C	9.9°C	146 mm	12.1	14 h 26	60	Strong coverage
June	27.3°C	15.7°C	139 mm	10.4	15 h 06	67	Strong coverage
July	29.4°C	17.9°C	113 mm	7.7	14 h 50	62	Strong coverage
August	28.3°C	16.5°C	117 mm	8.5	13 h 48	67	Strong coverage
September	24.8°C	11.6°C	102 mm	6.8	12 h 25	78	Strong coverage
October	17.9°C	4.7°C	66 mm	6.1	11 h 02	54	Strong coverage
November	9.1°C	-2.5°C	51 mm	4.3	9 h 50	16	Strong coverage
December	2.2°C	-8.1°C	32 mm	3.4	9 h 15	5	Strong coverage

What has changed

Shannon City runs +0.3°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

+0.9

Feb

-0.4

Mar

+1.3

Apr

-0.7

May

-1.0

Jun

0.0

Jul

-0.6

Aug

-0.7

Sep

+1.3

Oct

+0.4

Nov

+1.1

Dec

+2.4

September daytime highs, 2011–2025. Last recorded: 27.0°C.

Records at CRESTON 2 SW, 1905–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C27 Jan 2002	-35.0°C12 Jan 1912	65 mm12 Jan 1960	80 mm1960 · driest 0 mm in 2008	118
February	25.6°C24 Feb 1930	-32.2°C2 Feb 1996	60 mm1 Feb 1973	120 mm1911 · driest 0 mm in 1925	117
March	31.1°C31 Mar 2026	-28.9°C5 Mar 1960	102 mm20 Mar 2000	151 mm1990 · driest 1 mm in 1910	117
April	33.9°C30 Apr 1952	-13.9°C3 Apr 1975	88 mm18 Apr 2013	200 mm1919 · driest 4 mm in 2018	121
May	39.4°C30 May 1934	-5.0°C4 May 1907	112 mm9 May 1950	279 mm1982 · driest 12 mm in 2023	120
June	38.9°C29 Jun 1934	2.8°C1 Jun 2021	116 mm5 Jun 2010	316 mm1967 · driest 8 mm in 1911	121
July	43.9°C25 Jul 1936	3.9°C8 Jul 1905	184 mm24 Jul 2008	379 mm1915 · driest 7 mm in 1936	120
August	43.9°C5 Aug 1918	3.9°C25 Aug 1934	125 mm27 Aug 1977	343 mm1977 · driest 3 mm in 2020	119
September	39.4°C3 Sep 1939	-4.4°C29 Sep 1984	166 mm14 Sep 1992	362 mm1941 · driest 0 mm in 1952	120
October	33.3°C3 Oct 1997	-16.7°C28 Oct 1925	88 mm11 Oct 1973	184 mm1941 · driest 0 mm in 2004	119
November	26.7°C1 Nov 1938	-27.8°C30 Nov 1964	103 mm17 Nov 1952	148 mm1934 · driest 0 mm in 2017	118
December	21.7°C16 Dec 2021	-32.2°C22 Dec 1989	97 mm14 Dec 2015	150 mm2015 · driest 0 mm in 1976	117

Typical days per month at CRESTON 2 SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	<1	4
February	0	0	24	<1	4
March	<1	0	21	2	1
April	3	<1	8	3	<1
May	10	2	<1	4	0
June	21	8	0	4	0
July	27	13	0	3	0
August	25	10	0	3	0
September	15	4	<1	3	0
October	4	<1	6	2	<1
November	<1	0	18	2	<1
December	0	0	25	<1	3

How often, not how much — every day in CRESTON 2 SW’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%	12%	2%	7%	-4.8–3.9°C
February	<1%	15%	2%	10%	-3.2–6.9°C
March	9%	20%	5%	17%	4.5–13.1°C
April	25%	28%	10%	34%	13.7–19.4°C
May	49%	33%	12%	37%	19.6–25.4°C
June	68%	30%	13%	33%	25.2–29.8°C
July	76%	24%	10%	22%	28.0–32.6°C
August	74%	26%	11%	28%	26.6–31.7°C
September	65%	24%	10%	24%	22.4–27.4°C
October	37%	20%	7%	21%	15.3–20.9°C
November	6%	16%	6%	12%	5.9–12.4°C
December	<1%	13%	3%	6%	-2.0–5.5°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.

1906Each stripe is one year’s mean temperature against the 107-year average. Warmest: 1931. Coolest: 1917.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4876036
NOAA station: USC00131962 · CRESTON 2 SW
Station distance: 18.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 40.90°, 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 CRESTON 2 SW is what differs

Creston→Afton→Williamson→Cromwell→Kent→Country Court Mobile Home Park→

Or put two places side by side: Shannon City vs Creston

Best time to visitShannon City.