United States · 1991–2020

Best time to visit
Highland Lake.

September leads for comfortable weather in Highland Lake: typically 24.2°C by day, 11°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.2°C

Typical low11°C

Rain in September100 mm

Comfort

September

September · June · August

79climate match

Beach

July

July · August · June

68climate match

Outdoors

May

May · September · October

72climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 2.3°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

52.3° / -7.8°

Feb

54° / -7°

Mar

88.9° / -2.6°

Apr

4216.3° / 3°

May

6721.9° / 8.6°

Jun

7326.3° / 13.4°

Jul

6629° / 16.3°

Aug

7128° / 15.4°

Sep

7924.2° / 11°

Oct

4617.6° / 5.1°

Nov

2111.1° / -0.3°

Dec

55° / -4.3°

Monthly climate evidence for Highland Lake — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.3°C	-7.8°C	64 mm	7.6	9 h 31	5	Good coverage
February	4°C	-7°C	56 mm	7.6	10 h 33	5	Good coverage
March	8.9°C	-2.6°C	74 mm	8.4	11 h 48	8	Good coverage
April	16.3°C	3°C	75 mm	8.7	13 h 15	42	Good coverage
May	21.9°C	8.6°C	93 mm	10.8	14 h 28	67	Good coverage
June	26.3°C	13.4°C	112 mm	9.5	15 h 07	73	Good coverage
July	29°C	16.3°C	106 mm	9.1	14 h 52	66	Good coverage
August	28°C	15.4°C	105 mm	9	13 h 49	71	Good coverage
September	24.2°C	11°C	100 mm	7.3	12 h 25	79	Good coverage
October	17.6°C	5.1°C	111 mm	7.8	11 h 02	46	Good coverage
November	11.1°C	-0.3°C	73 mm	7.3	9 h 49	21	Good coverage
December	5°C	-4.3°C	83 mm	9.1	9 h 13	5	Good coverage

Records at SUSSEX AP, 2000–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C6 Jan 2007	-26.0°C16 Jan 2009	43 mm9 Jan 2024	125 mm2006 · driest 12 mm in 2025	26
February	24.4°C21 Feb 2018	-26.6°C24 Feb 2015	29 mm25 Feb 2010	144 mm2008 · driest 17 mm in 2002	26
March	26.7°C10 Mar 2026	-22.8°C7 Mar 2003	60 mm13 Mar 2010	206 mm2010 · driest 10 mm in 2016	26
April	33.9°C17 Apr 2002	-8.9°C7 Apr 2002	114 mm15 Apr 2007	196 mm2007 · driest 0 mm in 2014	26
May	35.0°C19 May 2026	-2.7°C1 May 2008	61 mm31 May 2025	235 mm2025 · driest 0 mm in 2014	26
June	37.2°C24 Jun 2025	1.7°C1 Jun 2001	58 mm26 Jun 2023	293 mm2006 · driest 14 mm in 2014	26
July	38.3°C6 Jul 2010	6.1°C3 Jul 2001	62 mm22 Jul 2019	192 mm2023 · driest 0 mm in 2025	26
August	37.8°C9 Aug 2001	7.2°C20 Aug 2008	76 mm22 Aug 2021	241 mm2011 · driest 0 mm in 2025	25
September	33.9°C8 Sep 2015	-1.0°C22 Sep 2020	117 mm28 Sep 2004	352 mm2011 · driest 19 mm in 2019	25
October	32.8°C2 Oct 2019	-6.6°C19 Oct 2015	199 mm8 Oct 2005	410 mm2005 · driest 0 mm in 2000	26
November	27.2°C6 Nov 2024	-14.3°C23 Nov 2018	53 mm2 Nov 2018	201 mm2018 · driest 0 mm in 2021	26
December	22.2°C6 Dec 2001	-23.9°C14 Dec 2005	50 mm18 Dec 2023	168 mm2023 · driest 29 mm in 2017	25

Typical days per month at SUSSEX AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	28	2
February	0	0	26	2
March	<1	0	22	2
April	3	<1	10	2
May	10	3	1	3
June	20	6	0	4
July	28	13	0	3
August	26	8	0	3
September	13	3	<1	3
October	3	<1	6	3
November	<1	0	17	2
December	0	0	25	3

How often, not how much — every day in SUSSEX 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%	24%	6%	23%	-0.5–5.6°C
February	<1%	26%	6%	32%	0.7–7.6°C
March	5%	28%	7%	34%	5.7–13.3°C
April	24%	30%	8%	42%	13.7–18.4°C
May	50%	34%	11%	47%	19.8–24.0°C
June	68%	31%	11%	39%	24.9–28.0°C
July	70%	29%	11%	37%	27.2–30.7°C
August	71%	29%	10%	30%	26.7–29.4°C
September	68%	25%	10%	29%	22.6–25.9°C
October	30%	24%	9%	26%	15.8–20.4°C
November	6%	24%	8%	24%	8.8–13.9°C
December	<1%	29%	9%	34%	2.8–8.3°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.

2001Each stripe is one year’s mean temperature against the 25-year average. Warmest: 2024. Coolest: 2003.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5099052
NOAA station: USW00054793 · SUSSEX AP
Station distance: 14.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 19 usable years
Daylight: Calculated from latitude 41.18°, 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 SUSSEX AP is what differs

Franklin→Hamburg→Ogdensburg→Vernon Center→Pellettown→Armstrong→

Or put two places side by side: Highland Lake vs Franklin

Best time to visitHighland Lake.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Highland Lake.

The whole year,
without the guesswork.

Nearby, measured,
and named.