United States · 1991–2020

Best time to visit
Penfield.

September leads for comfortable weather in Penfield: typically 26.7°C by day, 12.1°C at night, with 83 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.7°C

Typical low12.1°C

Rain in September83 mm

Comfort

September

September · May · August

77climate match

Beach

August

August · July · June

71climate match

Outdoors

October

October · May · April

75climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 1.1°C, 23° 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

51.1° / -9°

Feb

54° / -7°

Mar

1810.5° / -1.5°

Apr

4517.6° / 4.1°

May

7523.8° / 10.7°

Jun

6429° / 16.3°

Jul

5930.4° / 17.8°

Aug

6729.6° / 16.4°

Sep

7726.7° / 12.1°

Oct

5519.4° / 5.4°

Nov

1810.9° / -0.6°

Dec

54.1° / -5.6°

Monthly climate evidence for Penfield — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.1°C	-9°C	58 mm	6.4	9 h 35	5	Strong coverage
February	4°C	-7°C	52 mm	5.7	10 h 36	5	Strong coverage
March	10.5°C	-1.5°C	64 mm	7.2	11 h 49	18	Strong coverage
April	17.6°C	4.1°C	100 mm	8.8	13 h 13	45	Strong coverage
May	23.8°C	10.7°C	110 mm	9.7	14 h 23	75	Strong coverage
June	29°C	16.3°C	119 mm	8.9	15 h 02	64	Strong coverage
July	30.4°C	17.8°C	112 mm	7.8	14 h 47	59	Strong coverage
August	29.6°C	16.4°C	96 mm	6.8	13 h 46	67	Strong coverage
September	26.7°C	12.1°C	83 mm	6.1	12 h 24	77	Strong coverage
October	19.4°C	5.4°C	91 mm	8	11 h 04	55	Strong coverage
November	10.9°C	-0.6°C	81 mm	7.4	9 h 53	18	Strong coverage
December	4.1°C	-5.6°C	53 mm	6.2	9 h 19	5	Strong coverage

What has changed

Penfield runs +0.9°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

+1.4

Feb

+1.4

Mar

+1.5

Apr

+0.4

May

+0.6

Jun

+0.3

Jul

-0.1

Aug

+0.1

Sep

+1.1

Oct

+0.4

Nov

+0.3

Dec

+3.0

September daytime highs, 2011–2023. Last recorded: 26.7°C.

Records at RANTOUL, 1896–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C23 Jan 1909	-32.8°C20 Jan 1985	117 mm12 Jan 2019	177 mm2019 · driest 1 mm in 1986	90
February	22.2°C27 Feb 1996	-31.1°C13 Feb 1905	51 mm6 Feb 2008	142 mm2022 · driest 0 mm in 1978	90
March	30.6°C21 Mar 1907	-25.0°C2 Mar 1980	80 mm11 Mar 1990	191 mm1963 · driest 11 mm in 1910	91
April	32.8°C29 Apr 1899	-12.2°C2 Apr 2018	114 mm12 Apr 1994	250 mm1994 · driest 17 mm in 1976	91
May	37.2°C27 May 2012	-3.3°C1 May 1903	153 mm27 May 1956	275 mm1908 · driest 5 mm in 1964	90
June	40.6°C23 Jun 1994	2.2°C3 Jun 1910	129 mm21 Jun 1900	344 mm1902 · driest 0 mm in 1978	90
July	42.8°C14 Jul 1954	5.6°C2 Jul 1904	128 mm30 Jul 1987	316 mm1962 · driest 13 mm in 1901	89
August	38.9°C20 Aug 1983	3.3°C29 Aug 1986	156 mm6 Aug 1977	326 mm1977 · driest 15 mm in 1897	90
September	39.4°C5 Sep 1899	-4.4°C30 Sep 1899	102 mm15 Sep 2008	254 mm2008 · driest 0 mm in 1979	91
October	33.9°C7 Oct 2007	-7.2°C28 Oct 1990	110 mm24 Oct 2021	251 mm1949 · driest 0 mm in 1964	91
November	27.8°C2 Nov 2016	-20.6°C24 Nov 1950	61 mm23 Nov 1982	203 mm1985 · driest 3 mm in 1904	92
December	23.9°C4 Dec 1999	-30.0°C22 Dec 1989	73 mm7 Dec 1966	179 mm1967 · driest 1 mm in 1976	91

Typical days per month at RANTOUL, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	2
February	0	0	24	2	2
March	<1	0	20	3	<1
April	4	<1	7	4	<1
May	14	5	<1	4	0
June	25	14	0	4	0
July	29	18	0	4	0
August	28	15	0	3	0
September	19	8	<1	3	0
October	7	1	4	3	0
November	<1	0	17	3	<1
December	0	0	25	2	1

How often, not how much — every day in RANTOUL’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%	20%	5%	17%	-2.5–4.8°C
February	<1%	21%	6%	17%	-1.3–6.7°C
March	7%	26%	9%	29%	5.6–13.2°C
April	25%	30%	11%	36%	13.9–19.9°C
May	54%	30%	12%	36%	20.6–26.4°C
June	72%	27%	12%	28%	26.6–30.9°C
July	75%	24%	11%	23%	28.4–32.4°C
August	78%	21%	9%	19%	27.7–31.3°C
September	72%	21%	9%	20%	24.0–28.3°C
October	40%	21%	8%	21%	16.8–21.9°C
November	8%	23%	8%	20%	7.3–13.5°C
December	<1%	21%	7%	18%	-0.2–6.7°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.

1897Each stripe is one year’s mean temperature against the 85-year average. Warmest: 2012. Coolest: 1996.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4905634
NOAA station: USW00014806 · RANTOUL
Station distance: 18.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 40.30°, 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 RANTOUL is what differs

Rantoul→Fisher→Thomasboro→Gifford→Dewey→Dillsburg→

Or put two places side by side: Penfield vs Rantoul

Best time to visitPenfield.