United States · 1991–2020

Best time to visit
Heritage Lake.

September leads for comfortable weather in Heritage Lake: typically 25°C by day, 11.8°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25°C

Typical low11.8°C

Rain in September100 mm

Comfort

September

September · August · June

79climate match

Beach

August

August · July · June

72climate match

Outdoors

October

October · May · September

75climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 1.8°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

51.8° / -7.3°

Feb

54.3° / -5.6°

Mar

1510.5° / -0.9°

Apr

4117.3° / 4.9°

May

6722.6° / 10.5°

Jun

6927.1° / 15.5°

Jul

6329° / 17.3°

Aug

7328.4° / 16.3°

Sep

7925° / 11.8°

Oct

5418.5° / 5.6°

Nov

1811.1° / 0.4°

Dec

54.2° / -4.8°

Monthly climate evidence for Heritage Lake — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.8°C	-7.3°C	82 mm	9.1	9 h 39	5	Good coverage
February	4.3°C	-5.6°C	64 mm	7.4	10 h 38	5	Good coverage
March	10.5°C	-0.9°C	84 mm	8.8	11 h 49	15	Good coverage
April	17.3°C	4.9°C	122 mm	10.1	13 h 12	41	Good coverage
May	22.6°C	10.5°C	131 mm	10.2	14 h 20	67	Good coverage
June	27.1°C	15.5°C	133 mm	9.9	14 h 58	69	Good coverage
July	29°C	17.3°C	115 mm	8.5	14 h 43	63	Good coverage
August	28.4°C	16.3°C	84 mm	7.1	13 h 44	73	Good coverage
September	25°C	11.8°C	100 mm	6.3	12 h 24	79	Good coverage
October	18.5°C	5.6°C	88 mm	6.6	11 h 05	54	Good coverage
November	11.1°C	0.4°C	94 mm	8.2	9 h 56	18	Good coverage
December	4.2°C	-4.8°C	74 mm	9	9 h 22	5	Good coverage

Records at GREENCASTLE 1 W, 1895–2013
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C26 Jan 1950	-30.6°C20 Jan 1985	116 mm4 Jan 1950	347 mm1950 · driest 6 mm in 1986	108
February	23.3°C26 Feb 2000	-28.9°C2 Feb 1951	79 mm26 Feb 1997	164 mm2011 · driest 5 mm in 1947	106
March	30.0°C24 Mar 1929	-22.2°C8 Mar 1943	94 mm4 Mar 1897	270 mm1898 · driest 11 mm in 2001	105
April	32.2°C11 Apr 1930	-8.9°C7 Apr 1982	101 mm19 Apr 2013	300 mm2011 · driest 18 mm in 1900	106
May	35.0°C30 May 1919	-2.2°C9 May 1947	100 mm24 May 1968	283 mm1968 · driest 23 mm in 1988	108
June	40.6°C27 Jun 1954	1.1°C1 Jun 2003	165 mm22 Jun 1952	372 mm2008 · driest 1 mm in 1988	108
July	42.2°C8 Jul 1936	5.0°C20 Jul 1929	118 mm14 Jul 1962	300 mm1979 · driest 0 mm in 1901	107
August	40.6°C5 Aug 1918	4.4°C29 Aug 1965	130 mm19 Aug 1934	285 mm1979 · driest 12 mm in 2008	104
September	41.1°C6 Sep 1954	-3.3°C26 Sep 1928	161 mm1 Sep 1950	364 mm1950 · driest 4 mm in 1963	106
October	35.0°C1 Oct 1919	-7.8°C29 Oct 1925	109 mm26 Oct 1991	239 mm1986 · driest 4 mm in 1963	105
November	29.4°C1 Nov 1950	-21.1°C25 Nov 1950	71 mm2 Nov 1972	274 mm1985 · driest 4 mm in 1904	107
December	23.3°C3 Dec 1982	-29.4°C22 Dec 1989	72 mm30 Dec 1990	228 mm1924 · driest 1 mm in 1919	107

Typical days per month at GREENCASTLE 1 W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	5
February	0	0	23	2	4
March	<1	0	20	3	1
April	3	0	6	4	<1
May	11	2	<1	4	0
June	23	8	0	5	0
July	28	13	0	4	0
August	27	11	0	3	0
September	17	4	<1	3	0
October	5	<1	5	3	0
November	<1	0	16	3	<1
December	0	0	25	3	4

How often, not how much — every day in GREENCASTLE 1 W’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%	26%	8%	26%	-1.2–6.1°C
February	<1%	25%	7%	26%	0.7–8.0°C
March	9%	30%	10%	36%	6.6–14.4°C
April	27%	32%	12%	40%	14.9–20.3°C
May	53%	32%	13%	41%	20.6–26.2°C
June	68%	30%	13%	36%	25.7–30.7°C
July	75%	25%	11%	26%	28.1–33.1°C
August	77%	23%	10%	22%	27.5–31.3°C
September	70%	22%	10%	20%	23.3–28.5°C
October	41%	20%	8%	18%	16.6–22.6°C
November	7%	27%	10%	29%	8.1–13.5°C
December	<1%	26%	9%	30%	0.8–7.4°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.

1896Each stripe is one year’s mean temperature against the 96-year average. Warmest: 1921. Coolest: 2003.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8480041
NOAA station: USC00123513 · GREENCASTLE 1 W
Station distance: 17 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 39.73°, 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 GREENCASTLE 1 W is what differs

Greencastle→Cloverdale→Bainbridge→Coatesville→Fillmore→Van Bibber Lake→

Or put two places side by side: Heritage Lake vs Greencastle

Best time to visitHeritage Lake.