United States · 1991–2020

Best time to visit
Pontiac.

September leads for comfortable weather in Pontiac: typically 25.1°C by day, 12.6°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.1°C

Typical low12.6°C

Rain in September82 mm

Comfort

September

September · June · May

82climate match

Beach

July

July · August · June

74climate match

Outdoors

October

October · May · September

75climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only -0.2°C, 24° 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

5-0.2° / -8.6°

Feb

52.4° / -6.8°

Mar

139.3° / -1.5°

Apr

4517° / 4.6°

May

7122.7° / 10.7°

Jun

7327.3° / 16.3°

Jul

6528.6° / 18.2°

Aug

7028° / 17.3°

Sep

8225.1° / 12.6°

Oct

5518.2° / 6.3°

Nov

189.9° / 0.1°

Dec

52.6° / -5.5°

Monthly climate evidence for Pontiac — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.2°C	-8.6°C	54 mm	6.9	9 h 32	5	Strong coverage
February	2.4°C	-6.8°C	43 mm	5.8	10 h 34	5	Strong coverage
March	9.3°C	-1.5°C	66 mm	8	11 h 49	13	Strong coverage
April	17°C	4.6°C	86 mm	9.6	13 h 14	45	Strong coverage
May	22.7°C	10.7°C	108 mm	10.1	14 h 26	71	Strong coverage
June	27.3°C	16.3°C	99 mm	8.7	15 h 05	73	Strong coverage
July	28.6°C	18.2°C	107 mm	7.6	14 h 50	65	Strong coverage
August	28°C	17.3°C	98 mm	7.6	13 h 48	70	Strong coverage
September	25.1°C	12.6°C	82 mm	6.6	12 h 25	82	Strong coverage
October	18.2°C	6.3°C	80 mm	7.2	11 h 02	55	Strong coverage
November	9.9°C	0.1°C	66 mm	7.5	9 h 50	18	Strong coverage
December	2.6°C	-5.5°C	56 mm	7.5	9 h 15	5	Strong coverage

Records at PONTIAC, 1903–2017
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C23 Jan 1909	-31.1°C15 Jan 1927	86 mm8 Jan 2008	161 mm1916 · driest 0 mm in 1984	114
February	22.8°C18 Feb 2017	-30.6°C13 Feb 1905	65 mm6 Feb 1942	115 mm1942 · driest 1 mm in 1987	114
March	30.0°C30 Mar 1986	-25.6°C8 Mar 1943	97 mm12 Mar 1923	203 mm2007 · driest 5 mm in 1910	114
April	35.6°C27 Apr 1986	-11.7°C7 Apr 1982	69 mm27 Apr 1943	256 mm1957 · driest 9 mm in 1971	114
May	38.9°C31 May 1934	-4.4°C10 May 1966	121 mm11 May 1962	255 mm1995 · driest 12 mm in 1934	115
June	40.6°C27 Jun 1934	3.3°C5 Jun 1945	144 mm17 Jun 1973	295 mm1973 · driest 7 mm in 1988	114
July	42.2°C14 Jul 1936	5.6°C17 Jul 1985	111 mm18 Jul 2007	225 mm1958 · driest 7 mm in 1940	113
August	40.0°C5 Aug 1918	4.4°C31 Aug 1915	142 mm3 Aug 1943	220 mm1977 · driest 8 mm in 1984	114
September	39.4°C4 Sep 1925	-3.3°C28 Sep 1942	108 mm26 Sep 1933	301 mm1961 · driest 1 mm in 1979	114
October	34.4°C2 Oct 1922	-12.8°C30 Oct 1925	75 mm23 Oct 1957	294 mm1941 · driest 2 mm in 1964	114
November	27.8°C7 Nov 1915	-20.6°C28 Nov 1930	112 mm28 Nov 1990	208 mm1985 · driest 2 mm in 1904	114
December	21.7°C4 Dec 2012	-30.6°C28 Dec 1924	140 mm3 Dec 1982	182 mm1982 · driest 8 mm in 1995	114

Typical days per month at PONTIAC, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	5
February	0	0	25	1	4
March	<1	0	19	2	2
April	4	<1	5	3	<1
May	12	4	<1	4	0
June	23	10	0	3	0
July	26	11	0	3	0
August	26	9	0	3	0
September	16	5	<1	3	0
October	5	<1	3	3	0
November	<1	0	15	2	<1
December	0	0	26	2	3

How often, not how much — every day in PONTIAC’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%	21%	5%	19%	-3.6–4.6°C
February	<1%	21%	4%	17%	-1.5–6.0°C
March	7%	26%	7%	30%	5.7–13.3°C
April	25%	32%	11%	40%	14.1–19.8°C
May	52%	31%	11%	39%	20.2–25.9°C
June	70%	28%	10%	30%	25.6–30.4°C
July	77%	23%	10%	22%	27.6–33.0°C
August	77%	22%	8%	21%	26.7–31.4°C
September	69%	23%	9%	22%	23.3–28.2°C
October	38%	21%	7%	23%	16.5–22.0°C
November	6%	23%	7%	22%	7.0–13.2°C
December	<1%	22%	6%	21%	-1.0–6.2°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.

1903Each stripe is one year’s mean temperature against the 110-year average. Warmest: 1921. Coolest: 1989.2016

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4906438
NOAA station: USC00116910 · PONTIAC
Station distance: 0.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 40.88°, 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 PONTIAC is what differs

Cornell→Saunemin→Avoca (historical)→Blackstone→Cayuga→Champlin→

Or put two places side by side: Pontiac vs Cornell

Best time to visitPontiac.