United States · 1991–2020

Best time to visit
Lake Summerset.

September leads for comfortable weather in Lake Summerset: typically 23.7°C by day, 10.1°C at night, with 96 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.7°C

Typical low10.1°C

Rain in September96 mm

Comfort

September

September · August · July

78climate 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 78 — days reach only -2.6°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

5-2.6° / -11.9°

Feb

5-0.2° / -10.3°

Mar

56.6° / -4.4°

Apr

3114.6° / 1.9°

May

6121.1° / 8.4°

Jun

6926.6° / 14.1°

Jul

7028.4° / 16.2°

Aug

7427.4° / 14.9°

Sep

7823.7° / 10.1°

Oct

4516.5° / 3.8°

Nov

97.8° / -2.3°

Dec

50.4° / -8.2°

Monthly climate evidence for Lake Summerset — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-2.6°C	-11.9°C	40 mm	6.5	9 h 23	5	Strong coverage
February	-0.2°C	-10.3°C	45 mm	6.4	10 h 29	5	Strong coverage
March	6.6°C	-4.4°C	54 mm	7.3	11 h 48	5	Strong coverage
April	14.6°C	1.9°C	95 mm	9.5	13 h 18	31	Strong coverage
May	21.1°C	8.4°C	106 mm	10.8	14 h 35	61	Strong coverage
June	26.6°C	14.1°C	140 mm	9.7	15 h 16	69	Strong coverage
July	28.4°C	16.2°C	102 mm	7.9	15 h	70	Strong coverage
August	27.4°C	14.9°C	110 mm	7.7	13 h 54	74	Strong coverage
September	23.7°C	10.1°C	96 mm	7.6	12 h 26	78	Strong coverage
October	16.5°C	3.8°C	75 mm	7.7	10 h 59	45	Strong coverage
November	7.8°C	-2.3°C	60 mm	6.3	9 h 42	9	Strong coverage
December	0.4°C	-8.2°C	50 mm	6.9	9 h 05	5	Strong coverage

What has changed

Lake Summerset runs +0.5°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

+0.7

Feb

-0.1

Mar

+0.6

Apr

-0.5

May

0.0

Jun

+0.7

Jul

-0.1

Aug

+0.3

Sep

+1.3

Oct

+0.4

Nov

+0.2

Dec

+2.0

September daytime highs, 2011–2025. Last recorded: 26.1°C.

Records at BRODHEAD WWTP, 1897–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.1°C26 Jan 1944	-37.8°C30 Jan 1951	43 mm19 Jan 1907	113 mm1916 · driest 2 mm in 1981	128
February	22.8°C28 Feb 2024	-37.2°C20 Feb 1929	46 mm9 Feb 2001	111 mm2008 · driest 1 mm in 1958	129
March	28.9°C29 Mar 1910	-29.4°C1 Mar 1962	66 mm25 Mar 2009	157 mm2009 · driest 0 mm in 1910	128
April	33.3°C10 Apr 1930	-13.9°C6 Apr 1982	73 mm26 Apr 2009	273 mm2026 · driest 7 mm in 1915	126
May	40.6°C31 May 1934	-4.4°C4 May 1907	67 mm22 May 2004	237 mm1933 · driest 8 mm in 1958	127
June	41.1°C1 Jun 1934	0.6°C4 Jun 1945	142 mm25 Jun 1978	333 mm1993 · driest 11 mm in 1988	128
July	43.9°C12 Jul 1936	4.4°C2 Jul 1904	168 mm18 Jul 1996	247 mm1913 · driest 12 mm in 2026	128
August	39.4°C6 Aug 1918	1.7°C30 Aug 1915	169 mm4 Aug 1906	396 mm2007 · driest 12 mm in 1901	127
September	38.9°C6 Sep 1922	-6.7°C30 Sep 1899	121 mm12 Sep 2022	345 mm1938 · driest 1 mm in 2017	127
October	32.2°C4 Oct 2025	-16.7°C30 Oct 1925	73 mm10 Oct 1954	251 mm1984 · driest 0 mm in 1952	127
November	26.7°C1 Nov 1933	-27.8°C30 Nov 1947	71 mm17 Nov 1928	189 mm1934 · driest 2 mm in 2007	127
December	20.6°C16 Dec 2021	-34.4°C27 Dec 1950	49 mm15 Dec 1971	123 mm2015 · driest 5 mm in 1955	127

Typical days per month at BRODHEAD WWTP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	1	7
February	0	0	27	1	6
March	<1	0	25	2	3
April	2	<1	11	3	<1
May	9	2	1	4	0
June	21	8	0	4	0
July	26	11	0	3	0
August	25	7	0	3	0
September	13	4	<1	3	0
October	3	<1	8	2	<1
November	0	0	21	2	1
December	0	0	28	1	5

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 78); on 2011–2025 it is September (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in BRODHEAD WWTP’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%	18%	4%	15%	-6.0–1.2°C
February	<1%	19%	4%	17%	-4.2–4.0°C
March	3%	24%	6%	25%	3.1–10.6°C
April	19%	29%	10%	36%	11.8–18.1°C
May	45%	31%	10%	37%	18.6–24.4°C
June	67%	30%	13%	35%	24.6–28.9°C
July	75%	25%	11%	25%	27.3–31.8°C
August	75%	24%	11%	24%	25.8–30.3°C
September	60%	25%	10%	27%	21.9–26.3°C
October	29%	23%	7%	24%	14.5–20.2°C
November	3%	21%	6%	18%	4.5–11.1°C
December	0%	20%	4%	18%	-3.4–3.6°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.

1898Each stripe is one year’s mean temperature against the 121-year average. Warmest: 1921. Coolest: 1982.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4899135
NOAA station: USC00471078 · BRODHEAD WWTP
Station distance: 18.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 42.45°, 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 BRODHEAD WWTP is what differs

Brodhead→Decatur→Orfordville→Durand→Albany→Juda→

Or put two places side by side: Lake Summerset vs Brodhead

Best time to visitLake Summerset.

September

July

May

The whole year,without the guesswork.

Lake Summerset runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Lake Summerset.

The whole year,
without the guesswork.

Lake Summerset runs +0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.