United States · 1991–2020

Best time to visit
New Hartford.

September leads for comfortable weather in New Hartford: typically 22.8°C by day, 12°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high22.8°C

Typical low12°C

Rain in September97 mm

Comfort

September

September · June · August

78climate match

Beach

July

July · August · June

67climate match

Outdoors

May

May · September · October

74climate match

The weakest month is January, scoring 5 against September’s 78 — days reach only -3.3°C, 27° 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

5-3.3° / -12.4°

Feb

5-0.6° / -10.4°

Mar

56.3° / -3.7°

Apr

3414.4° / 3.2°

May

6321.1° / 9.6°

Jun

7526.1° / 15.4°

Jul

6528.1° / 17.7°

Aug

7326.9° / 16.5°

Sep

7822.8° / 12°

Oct

4615.4° / 5.2°

Nov

96.6° / -1.7°

Dec

5-0.6° / -8.5°

Monthly climate evidence for New Hartford — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-3.3°C	-12.4°C	27 mm	5.1	9 h 14	5	Strong coverage
February	-0.6°C	-10.4°C	28 mm	4.3	10 h 24	5	Strong coverage
March	6.3°C	-3.7°C	45 mm	5.9	11 h 47	5	Strong coverage
April	14.4°C	3.2°C	93 mm	8.8	13 h 22	34	Strong coverage
May	21.1°C	9.6°C	113 mm	10.4	14 h 43	63	Strong coverage
June	26.1°C	15.4°C	110 mm	10.1	15 h 27	75	Strong coverage
July	28.1°C	17.7°C	116 mm	9.1	15 h 09	65	Strong coverage
August	26.9°C	16.5°C	106 mm	8.6	14 h	73	Strong coverage
September	22.8°C	12°C	97 mm	8.1	12 h 27	78	Strong coverage
October	15.4°C	5.2°C	66 mm	7.4	10 h 55	46	Strong coverage
November	6.6°C	-1.7°C	46 mm	5.5	9 h 35	9	Strong coverage
December	-0.6°C	-8.5°C	34 mm	5.9	8 h 55	5	Strong coverage

What has changed

New Hartford runs +0.6°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

+1.6

Feb

0.0

Mar

+1.5

Apr

-1.1

May

-0.1

Jun

+0.5

Jul

-0.3

Aug

-0.1

Sep

+1.7

Oct

+0.3

Nov

+1.2

Dec

+2.3

September daytime highs, 2011–2025. Last recorded: 23.9°C.

Records at TREMPEALEAU DAM 6, 1937–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.4°C25 Jan 1944	-42.2°C30 Jan 1951	38 mm4 Jan 1971	95 mm1996 · driest 2 mm in 1962	85
February	16.7°C28 Feb 2024	-40.6°C3 Feb 1996	39 mm27 Feb 1998	107 mm2019 · driest 0 mm in 1970	84
March	28.3°C29 Mar 1986	-35.6°C1 Mar 1962	53 mm23 Mar 1966	103 mm1951 · driest 4 mm in 1958	85
April	33.9°C21 Apr 1980	-13.3°C6 Apr 1982	66 mm24 Apr 1990	215 mm2008 · driest 1 mm in 1946	87
May	37.2°C20 May 1939	-4.4°C10 May 1966	95 mm18 May 2000	242 mm2013 · driest 26 mm in 2002	89
June	39.4°C24 Jun 1938	1.7°C4 Jun 1945	108 mm21 Jun 1968	252 mm1968 · driest 26 mm in 1989	89
July	42.8°C9 Jul 1937	6.1°C7 Jul 1984	152 mm20 Jul 2017	321 mm1978 · driest 8 mm in 1937	89
August	42.2°C17 Aug 1937	4.4°C14 Aug 1964	96 mm29 Aug 1960	270 mm2007 · driest 17 mm in 1969	89
September	39.4°C2 Sep 1937	-5.0°C30 Sep 1984	153 mm21 Sep 1980	334 mm1980 · driest 5 mm in 1998	89
October	32.8°C2 Oct 2023	-10.6°C30 Oct 1988	80 mm5 Oct 2013	163 mm2009 · driest 1 mm in 1952	89
November	24.4°C3 Nov 2022	-22.8°C26 Nov 1977	59 mm9 Nov 1975	171 mm1991 · driest 0 mm in 1976	83
December	18.3°C16 Dec 2021	-36.1°C27 Dec 1950	34 mm14 Dec 2015	122 mm2015 · driest 1 mm in 1943	82

Typical days per month at TREMPEALEAU DAM 6, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	5
February	0	0	27	<1	4
March	<1	0	22	2	2
April	1	<1	9	3	<1
May	8	1	<1	4	0
June	20	5	0	4	0
July	26	9	0	4	0
August	23	5	0	3	0
September	11	2	<1	3	0
October	2	<1	5	2	0
November	0	0	19	1	1
December	0	0	28	1	5

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 81); on 2011–2025 it is September (88). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in TREMPEALEAU DAM 6’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%	16%	2%	10%	-7.1–-0.7°C
February	0%	15%	3%	9%	-4.2–3.5°C
March	3%	20%	5%	18%	2.4–9.8°C
April	17%	28%	9%	35%	11.3–17.2°C
May	47%	32%	12%	37%	18.9–24.1°C
June	65%	32%	13%	40%	24.4–28.5°C
July	73%	27%	11%	30%	26.7–30.6°C
August	72%	27%	11%	29%	25.8–29.2°C
September	56%	26%	10%	29%	20.8–25.0°C
October	24%	21%	6%	20%	13.2–18.9°C
November	2%	19%	5%	17%	2.7–9.4°C
December	0%	17%	3%	10%	-4.3–2.5°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.

1937Each stripe is one year’s mean temperature against the 76-year average. Warmest: 2012. Coolest: 1951.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5039090
NOAA station: USC00478589 · TREMPEALEAU DAM 6
Station distance: 13.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 43.88°, 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 TREMPEALEAU DAM 6 is what differs

Trempealeau→Galesville→Pickwick→Donehower→Lamoille→Nodine→

Or put two places side by side: New Hartford vs Trempealeau

Best time to visitNew Hartford.

September

July

May

The whole year,without the guesswork.

New Hartford runs +0.6°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
New Hartford.

The whole year,
without the guesswork.

New Hartford runs +0.6°C
on the 1961–1990 baseline.

Nearby, measured,
and named.