United States · 1991–2020

Best time to visit
Promise City.

September leads for comfortable weather in Promise City: typically 24.8°C by day, 11.8°C at night, with 106 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.8°C

Typical low11.8°C

Rain in September106 mm

Comfort

September

September · June · August

78climate match

Beach

July

July · August · June

73climate match

Outdoors

October

October · May · September

70climate match

The weakest month is January, scoring 5 against September’s 78 — days reach only 0.1°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

50.1° / -10.5°

Feb

52.4° / -8.8°

Mar

149.4° / -2.5°

Apr

4116.4° / 3.5°

May

6321.8° / 10.1°

Jun

7026.7° / 15.4°

Jul

6329.4° / 17.9°

Aug

6728.4° / 16.5°

Sep

7824.8° / 11.8°

Oct

5017.4° / 4.9°

Nov

2110.1° / -1.6°

Dec

52.4° / -7.9°

Monthly climate evidence for Promise City — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.1°C	-10.5°C	46 mm	4	9 h 33	5	Good coverage
February	2.4°C	-8.8°C	48 mm	5	10 h 35	5	Good coverage
March	9.4°C	-2.5°C	56 mm	6.9	11 h 49	14	Good coverage
April	16.4°C	3.5°C	92 mm	8.5	13 h 14	41	Good coverage
May	21.8°C	10.1°C	139 mm	10.6	14 h 26	63	Good coverage
June	26.7°C	15.4°C	139 mm	9.2	15 h 05	70	Good coverage
July	29.4°C	17.9°C	110 mm	7.3	14 h 49	63	Good coverage
August	28.4°C	16.5°C	117 mm	7.4	13 h 47	67	Good coverage
September	24.8°C	11.8°C	106 mm	7	12 h 25	78	Good coverage
October	17.4°C	4.9°C	82 mm	7	11 h 03	50	Good coverage
November	10.1°C	-1.6°C	47 mm	4.3	9 h 51	21	Good coverage
December	2.4°C	-7.9°C	32 mm	4.2	9 h 16	5	Good coverage

Records at ALLERTON, 1902–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C9 Jan 2003	-33.9°C12 Jan 1912	102 mm21 Jan 2006	254 mm2006 · driest 0 mm in 2008	47
February	24.4°C23 Feb 2017	-36.1°C13 Feb 1905	102 mm13 Feb 2007	178 mm2007 · driest 0 mm in 2010	47
March	32.8°C22 Mar 2026	-25.0°C12 Mar 1998	57 mm25 Mar 1915	129 mm2009 · driest 0 mm in 2008	44
April	32.2°C29 Apr 1910	-13.3°C9 Apr 2006	117 mm18 Apr 2013	207 mm2013 · driest 0 mm in 2008	45
May	35.0°C28 May 2018	-7.2°C4 May 1907	103 mm28 May 1918	339 mm2019 · driest 1 mm in 2026	46
June	37.8°C29 Jun 1911	-1.1°C12 Jun 1903	114 mm8 Jun 1909	293 mm2014 · driest 21 mm in 2023	45
July	42.2°C5 Jul 1911	7.8°C17 Jul 1911	165 mm6 Jul 1909	326 mm2015 · driest 6 mm in 1913	47
August	42.2°C4 Aug 1918	3.9°C30 Aug 1915	235 mm27 Aug 1903	403 mm2007 · driest 7 mm in 2020	45
September	39.4°C4 Sep 1913	-2.8°C22 Sep 1913	82 mm27 Sep 2014	365 mm2010 · driest 6 mm in 2024	45
October	33.3°C6 Oct 2024	-8.9°C29 Oct 1910	72 mm13 Oct 1997	178 mm2009 · driest 3 mm in 1910	46
November	26.7°C5 Nov 1909	-20.0°C30 Nov 1919	76 mm11 Nov 2021	97 mm2022 · driest 0 mm in 2009	46
December	22.8°C16 Dec 2021	-27.8°C29 Dec 1917	76 mm7 Dec 2007	191 mm2007 · driest 1 mm in 2002	48

Typical days per month at ALLERTON, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	4
February	0	0	25	1	4
March	<1	0	21	2	2
April	3	<1	8	3	<1
May	10	1	<1	5	0
June	21	7	0	4	0
July	27	13	0	3	0
August	25	10	0	3	0
September	15	5	0	3	0
October	4	<1	6	2	<1
November	<1	0	18	2	<1
December	0	0	27	1	3

How often, not how much — every day in ALLERTON’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%	14%	4%	11%	-2.8–3.9°C
February	<1%	17%	4%	12%	-2.6–7.2°C
March	11%	20%	6%	20%	4.7–14.7°C
April	24%	27%	10%	31%	13.9–18.5°C
May	45%	33%	14%	43%	19.6–24.4°C
June	68%	29%	14%	37%	24.8–28.9°C
July	75%	25%	11%	21%	27.5–32.3°C
August	76%	23%	10%	22%	26.8–31.7°C
September	68%	23%	11%	22%	22.6–27.2°C
October	37%	21%	7%	19%	15.5–20.5°C
November	9%	16%	5%	13%	6.7–13.9°C
December	<1%	15%	4%	8%	-1.2–6.1°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.

1903Each stripe is one year’s mean temperature against the 40-year average. Warmest: 2012. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4872240
NOAA station: USC00130149 · ALLERTON
Station distance: 19.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 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 ALLERTON is what differs

Corydon→Allerton→Lineville→Clio→Powersville→Millerton→

Or put two places side by side: Promise City vs Corydon

Best time to visitPromise City.