United States · 1991–2020

Best time to visit
Park Layne.

September leads for comfortable weather in Park Layne: typically 25.1°C by day, 13.1°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.1°C

Typical low13.1°C

Rain in September84 mm

Comfort

September

September · August · May

83climate match

Beach

August

August · July · June

78climate match

Outdoors

October

October · May · September

78climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 2°C, 22° 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

52° / -6.3°

Feb

54.3° / -4.8°

Mar

1310° / -0.2°

Apr

4317.3° / 5.5°

May

7122.7° / 11.5°

Jun

7127.3° / 16.5°

Jul

6329.1° / 18.3°

Aug

7228.4° / 17.3°

Sep

8325.1° / 13.1°

Oct

5718.2° / 7.1°

Nov

2110.8° / 1.3°

Dec

54.5° / -3.3°

Monthly climate evidence for Park Layne — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2°C	-6.3°C	78 mm	9.3	9 h 38	5	Strong coverage
February	4.3°C	-4.8°C	60 mm	8.1	10 h 37	5	Strong coverage
March	10°C	-0.2°C	89 mm	9.3	11 h 49	13	Strong coverage
April	17.3°C	5.5°C	113 mm	10.4	13 h 12	43	Strong coverage
May	22.7°C	11.5°C	115 mm	11.3	14 h 21	71	Strong coverage
June	27.3°C	16.5°C	105 mm	9.5	14 h 59	71	Strong coverage
July	29.1°C	18.3°C	100 mm	8.6	14 h 44	63	Strong coverage
August	28.4°C	17.3°C	75 mm	6.3	13 h 44	72	Strong coverage
September	25.1°C	13.1°C	84 mm	6.9	12 h 24	83	Strong coverage
October	18.2°C	7.1°C	75 mm	7.3	11 h 05	57	Strong coverage
November	10.8°C	1.3°C	78 mm	7.6	9 h 55	21	Strong coverage
December	4.5°C	-3.3°C	77 mm	8.4	9 h 21	5	Strong coverage

What has changed

Park Layne runs +1.2°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

+1.4

Feb

+2.1

Mar

+1.5

Apr

+1.1

May

+1.2

Jun

+0.6

Jul

+0.3

Aug

+0.4

Sep

+1.4

Oct

+1.1

Nov

+0.5

Dec

+2.4

September daytime highs, 2011–2025. Last recorded: 27.2°C.

Records at DAYTON INTL AP, 1948–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C25 Jan 1950	-31.7°C19 Jan 1994	106 mm21 Jan 1959	251 mm1950 · driest 8 mm in 1981	79
February	24.4°C24 Feb 2017	-26.7°C2 Feb 1951	66 mm20 Feb 1951	156 mm2019 · driest 6 mm in 1978	79
March	30.0°C22 Mar 2026	-21.7°C2 Mar 1980	73 mm4 Mar 1964	194 mm1964 · driest 27 mm in 1966	79
April	31.7°C30 Apr 1962	-9.4°C8 Apr 1972	79 mm2 Apr 1977	234 mm1996 · driest 14 mm in 1962	79
May	33.9°C18 May 1962	-3.3°C1 May 1963	81 mm23 May 1989	262 mm2026 · driest 40 mm in 1964	79
June	38.9°C28 Jun 2012	4.4°C11 Jun 1972	96 mm5 Jun 1981	277 mm1958 · driest 8 mm in 1962	79
July	38.9°C7 Jul 2012	6.7°C6 Jul 1972	80 mm9 Jul 1955	217 mm1990 · driest 12 mm in 1974	79
August	38.9°C17 Aug 1988	4.4°C3 Aug 1965	86 mm5 Aug 1995	204 mm1974 · driest 1 mm in 1996	78
September	38.3°C6 Sep 1954	0.0°C23 Sep 1974	97 mm16 Sep 2005	275 mm2011 · driest 7 mm in 1963	78
October	34.4°C2 Oct 2019	-6.1°C26 Oct 1962	90 mm5 Oct 1995	159 mm1986 · driest 4 mm in 1963	78
November	26.7°C8 Nov 2020	-18.9°C30 Nov 1958	91 mm5 Nov 2017	205 mm1985 · driest 12 mm in 1949	78
December	22.2°C6 Dec 1998	-28.9°C22 Dec 1989	72 mm30 Dec 1990	255 mm1990 · driest 9 mm in 1955	78

Typical days per month at DAYTON INTL AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	2	8
February	0	0	23	2	6
March	<1	0	17	3	3
April	3	0	5	4	1
May	12	2	<1	4	0
June	23	9	0	4	0
July	29	14	0	3	0
August	28	11	0	3	0
September	16	5	0	3	0
October	4	<1	2	2	<1
November	<1	0	14	2	1
December	0	0	23	3	5

How often, not how much — every day in DAYTON INTL AP’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	<1%	29%	7%	34%	-1.9–5.8°C
February	<1%	27%	7%	30%	0.2–7.1°C
March	8%	31%	10%	40%	7.0–13.7°C
April	24%	34%	11%	45%	14.3–19.3°C
May	49%	33%	12%	43%	19.9–25.7°C
June	68%	30%	11%	36%	25.5–29.2°C
July	73%	27%	10%	28%	27.6–31.2°C
August	78%	22%	8%	21%	27.0–30.2°C
September	69%	22%	8%	20%	22.7–27.1°C
October	34%	23%	7%	24%	15.6–20.8°C
November	7%	27%	8%	30%	7.5–13.8°C
December	<1%	28%	8%	31%	0.2–7.6°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.

1948Each stripe is one year’s mean temperature against the 78-year average. Warmest: 2024. Coolest: 1958.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4520864
NOAA station: USW00093815 · DAYTON INTL AP
Station distance: 15.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 39.89°, 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 DAYTON INTL AP is what differs

Vandalia→Englewood→Clayton→Tipp City→Union→Brookville→

Or put two places side by side: Park Layne vs Vandalia

Best time to visitPark Layne.