United States · 1991–2020

Best time to visit
Brownville.

June leads for comfortable weather in Brownville: typically 23.9°C by day, 11.8°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high23.9°C

Typical low11.8°C

Rain in June79 mm

Comfort

June

June · July · August

82climate match

Beach

July

July · August · June

63climate match

Outdoors

September

September · May · June

77climate match

The weakest month is January, scoring 5 against June’s 82 — days reach only -1°C, 25° 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

5-1° / -12.2°

Feb

5-0.1° / -11.7°

Mar

54.7° / -6.2°

Apr

2312.3° / 0.4°

May

5719.3° / 6.6°

Jun

8223.9° / 11.8°

Jul

8126.5° / 15°

Aug

8025.9° / 13.8°

Sep

7122° / 9.4°

Oct

3314.9° / 4.1°

Nov

58.3° / -1.3°

Dec

52.2° / -7.1°

Monthly climate evidence for Brownville — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 34 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-1°C	-12.2°C	73 mm	11.7	3.1°C	9 h 14	5	Strong coverage
February	-0.1°C	-11.7°C	55 mm	9.3	1.7°C	10 h 24	5	Strong coverage
March	4.7°C	-6.2°C	60 mm	9.3	1.4°C	11 h 47	5	Strong coverage
April	12.3°C	0.4°C	78 mm	10.1	3.2°C	13 h 22	23	Strong coverage
May	19.3°C	6.6°C	76 mm	10.4	7.4°C	14 h 43	57	Strong coverage
June	23.9°C	11.8°C	79 mm	9.7	14.8°C	15 h 28	82	Strong coverage
July	26.5°C	15°C	76 mm	8.3	20.7°C	15 h 10	81	Strong coverage
August	25.9°C	13.8°C	81 mm	8.3	22.3°C	14 h 00	80	Strong coverage
September	22°C	9.4°C	89 mm	8.6	19.8°C	12 h 27	71	Strong coverage
October	14.9°C	4.1°C	107 mm	11.4	14.8°C	10 h 55	33	Strong coverage
November	8.3°C	-1.3°C	86 mm	11.4	10.0°C	9 h 34	5	Strong coverage
December	2.2°C	-7.1°C	80 mm	12.1	6.1°C	8 h 54	5	Strong coverage

What has changed

Brownville runs +1.4°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

+2.1

Feb

+2.2

Mar

+1.1

Apr

+0.5

May

+1.5

Jun

+0.9

Jul

+0.8

Aug

+0.9

Sep

+1.6

Oct

+1.3

Nov

+0.9

Dec

+2.7

June daytime highs, 2011–2025. Last recorded: 25.0°C.

Records at WATERTOWN AP, 1949–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C14 Jan 1995	-41.7°C16 Jan 1994	58 mm8 Jan 1998	189 mm1999 · driest 13 mm in 1981	77
February	20.6°C27 Feb 2024	-38.2°C14 Feb 2016	54 mm16 Feb 1954	139 mm1971 · driest 6 mm in 1978	77
March	28.9°C30 Mar 1977	-31.1°C12 Mar 1984	47 mm4 Mar 1971	145 mm1999 · driest 4 mm in 1967	77
April	31.7°C28 Apr 1990	-14.4°C1 Apr 1965	50 mm2 Apr 2005	151 mm2014 · driest 16 mm in 2001	77
May	32.8°C22 May 2024	-7.8°C7 May 1966	55 mm30 May 1956	143 mm2017 · driest 18 mm in 1965	77
June	35.0°C14 Jun 1949	-1.7°C5 Jun 1964	83 mm23 Jun 2017	167 mm2024 · driest 9 mm in 1973	77
July	36.1°C18 Jul 1953	0.6°C2 Jul 1962	59 mm6 Jul 1959	189 mm2021 · driest 8 mm in 1963	77
August	35.6°C19 Aug 1955	-1.1°C27 Aug 1969	104 mm8 Aug 1981	196 mm1981 · driest 14 mm in 1960	77
September	35.6°C4 Sep 1953	-5.6°C30 Sep 1991	93 mm16 Sep 2005	189 mm1975 · driest 4 mm in 1961	77
October	28.9°C5 Oct 1951	-11.1°C20 Oct 1972	93 mm9 Oct 2017	299 mm2017 · driest 5 mm in 1963	77
November	25.0°C2 Nov 1971	-21.6°C22 Nov 2018	75 mm29 Nov 1963	182 mm1963 · driest 19 mm in 1960	77
December	20.6°C4 Dec 2012	-38.3°C25 Dec 1980	57 mm10 Dec 1995	169 mm1985 · driest 8 mm in 1979	77

Typical days per month at WATERTOWN AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	2	14
February	0	0	26	2	10
March	<1	0	25	2	8
April	<1	<1	16	3	3
May	5	<1	3	2	<1
June	13	2	0	3	0
July	22	5	0	3	0
August	20	4	0	3	0
September	8	1	1	3	<1
October	1	0	8	4	<1
November	0	0	18	3	5
December	0	0	26	2	12

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 89); on 2011–2025 it is June (86). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in WATERTOWN 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	0%	36%	6%	46%	-5.5–2.0°C
February	0%	32%	5%	40%	-3.7–2.9°C
March	2%	29%	5%	36%	1.8–8.0°C
April	9%	32%	7%	40%	9.8–14.4°C
May	33%	30%	7%	37%	16.2–21.6°C
June	59%	29%	8%	31%	21.9–25.5°C
July	75%	23%	7%	24%	24.9–28.2°C
August	72%	26%	9%	27%	24.0–27.3°C
September	49%	27%	9%	32%	19.4–23.6°C
October	15%	32%	9%	43%	12.8–17.3°C
November	1%	36%	8%	50%	5.2–10.6°C
December	<1%	38%	7%	53%	-2.5–4.6°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.

1950Each stripe is one year’s mean temperature against the 75-year average. Warmest: 2024. Coolest: 1972.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5110449
NOAA station: USW00094790 · WATERTOWN AP
Station distance: 3.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 44.01°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 34 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 WATERTOWN AP is what differs

Clayton→Adams→Adams Center→Sackets Harbor→Dexter→Sandy Creek→

Or put two places side by side: Brownville vs Clayton

Best time to visitBrownville.

June

July

September

The whole year,without the guesswork.

Brownville runs +1.4°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Brownville.

The whole year,
without the guesswork.

Brownville runs +1.4°C
on the 1961–1990 baseline.

Nearby, measured,
and named.