United States · 1991–2020

Best time to visit
Hamilton.

September leads for comfortable weather in Hamilton: typically 23.2°C by day, 10.4°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.2°C

Typical low10.4°C

Rain in September79 mm

Comfort

September

September · June · August

79climate match

Beach

July

July · August · June

66climate match

Outdoors

September

September · May · October

77climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only -0.8°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

5-0.8° / -9.1°

Feb

51.1° / -8.5°

Mar

57.1° / -3.9°

Apr

3014.3° / 1.9°

May

6020.8° / 8.5°

Jun

7725.8° / 14.1°

Jul

7327.7° / 15.9°

Aug

7726.7° / 14.9°

Sep

7923.2° / 10.4°

Oct

4416.1° / 4.4°

Nov

88.4° / -1.1°

Dec

52° / -5.7°

Monthly climate evidence for Hamilton — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.8°C	-9.1°C	66 mm	9.4	9 h 28	5	Strong coverage
February	1.1°C	-8.5°C	58 mm	8	10 h 32	5	Strong coverage
March	7.1°C	-3.9°C	64 mm	9	11 h 48	5	Strong coverage
April	14.3°C	1.9°C	93 mm	9.8	13 h 16	30	Strong coverage
May	20.8°C	8.5°C	111 mm	10.2	14 h 30	60	Strong coverage
June	25.8°C	14.1°C	104 mm	9.7	15 h 10	77	Strong coverage
July	27.7°C	15.9°C	96 mm	8	14 h 54	73	Strong coverage
August	26.7°C	14.9°C	100 mm	8.3	13 h 50	77	Strong coverage
September	23.2°C	10.4°C	79 mm	7.1	12 h 25	79	Strong coverage
October	16.1°C	4.4°C	75 mm	9	11 h 01	44	Strong coverage
November	8.4°C	-1.1°C	76 mm	9	9 h 47	8	Strong coverage
December	2°C	-5.7°C	64 mm	9.2	9 h 11	5	Strong coverage

What has changed

Hamilton runs +0.7°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

+1.0

Feb

+1.3

Mar

+2.1

Apr

+0.5

May

+0.4

Jun

+0.4

Jul

0.0

Aug

-0.1

Sep

+0.5

Oct

+0.5

Nov

-0.3

Dec

+2.1

September daytime highs, 2011–2025. Last recorded: 25.2°C.

Records at ANGOLA, 1898–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C25 Jan 1950	-32.8°C4 Jan 1981	44 mm30 Jan 1947	162 mm1950 · driest 7 mm in 1961	112
February	21.7°C26 Feb 2000	-30.6°C1 Feb 2019	64 mm29 Feb 1904	160 mm2018 · driest 1 mm in 1987	111
March	29.4°C22 Mar 2012	-25.0°C2 Mar 1978	63 mm25 Mar 1954	196 mm1904 · driest 11 mm in 1958	110
April	31.1°C30 Apr 1942	-15.6°C7 Apr 1982	82 mm29 Apr 1956	211 mm1950 · driest 4 mm in 2004	111
May	33.9°C28 May 2018	-5.6°C4 May 2005	104 mm17 May 1996	311 mm1943 · driest 8 mm in 1977	112
June	38.9°C1 Jun 1934	0.0°C11 Jun 1980	90 mm18 Jun 1996	217 mm1902 · driest 21 mm in 1988	113
July	41.1°C13 Jul 1936	4.4°C12 Jul 1978	127 mm9 Jul 1951	253 mm1992 · driest 10 mm in 1946	112
August	38.9°C6 Aug 1947	2.8°C19 Aug 1977	119 mm5 Aug 1953	337 mm2007 · driest 2 mm in 1971	112
September	38.3°C15 Sep 1939	-2.8°C28 Sep 1991	84 mm28 Sep 2019	195 mm1947 · driest 1 mm in 1979	111
October	36.1°C8 Oct 2007	-8.9°C29 Oct 1925	122 mm12 Oct 1901	226 mm1954 · driest 10 mm in 2005	112
November	28.3°C1 Nov 1950	-20.0°C24 Nov 1950	68 mm2 Nov 1936	187 mm1927 · driest 4 mm in 1904	112
December	21.7°C13 Dec 2015	-28.3°C25 Dec 1983	84 mm25 Dec 1965	141 mm1967 · driest 7 mm in 1958	112

Typical days per month at ANGOLA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	2	8
February	0	0	26	2	7
March	<1	0	24	2	3
April	1	0	11	3	<1
May	8	2	<1	3	0
June	18	5	0	4	0
July	25	8	0	3	0
August	23	5	0	3	0
September	12	2	<1	3	0
October	2	<1	7	2	0
November	0	0	19	3	2
December	0	0	27	2	6

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 84); on 2011–2025 it is September (87). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in ANGOLA’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%	28%	6%	30%	-4.1–2.9°C
February	<1%	27%	5%	27%	-2.9–4.5°C
March	4%	31%	8%	38%	3.2–11.1°C
April	16%	33%	11%	41%	11.8–16.7°C
May	43%	31%	11%	38%	18.0–23.9°C
June	66%	29%	11%	31%	23.9–28.0°C
July	74%	25%	10%	24%	26.6–30.6°C
August	74%	25%	9%	24%	25.6–29.1°C
September	60%	25%	10%	26%	21.6–25.7°C
October	26%	25%	7%	27%	14.7–20.3°C
November	3%	29%	8%	33%	5.7–11.3°C
December	<1%	29%	7%	33%	-1.3–4.6°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.

1899Each stripe is one year’s mean temperature against the 107-year average. Warmest: 1921. Coolest: 1978.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4921083
NOAA station: USC00120200 · ANGOLA
Station distance: 16.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 41.53°, 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 ANGOLA is what differs

Angola→Fremont→Ashley→Hudson→Orland→Clear Lake→

Or put two places side by side: Hamilton vs Angola

Best time to visitHamilton.

September

July

September

The whole year,without the guesswork.

Hamilton runs +0.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Hamilton.

The whole year,
without the guesswork.

Hamilton runs +0.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.