United States · 1991–2020

Best time to visit
Plano.

September leads for comfortable weather in Plano: typically 24.6°C by day, 10.8°C at night, with 74 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.6°C

Typical low10.8°C

Rain in September74 mm

Comfort

September

September · August · June

82climate match

Beach

July

July · August · June

74climate match

Outdoors

September

September · May · October

74climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only -0.9°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

5-0.9° / -10°

Feb

51.2° / -8.7°

Mar

118.5° / -2.5°

Apr

3815.9° / 2.9°

May

6422° / 9.2°

Jun

7427.1° / 14.6°

Jul

7029° / 16.4°

Aug

7627.7° / 15°

Sep

8224.6° / 10.8°

Oct

4817.1° / 4.3°

Nov

179.4° / -1.3°

Dec

52° / -6.9°

Monthly climate evidence for Plano — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.9°C	-10°C	33 mm	5.1	9 h 28	5	Good coverage
February	1.2°C	-8.7°C	36 mm	4.9	10 h 32	5	Good coverage
March	8.5°C	-2.5°C	53 mm	7.4	11 h 48	11	Good coverage
April	15.9°C	2.9°C	93 mm	9.2	13 h 16	38	Good coverage
May	22°C	9.2°C	116 mm	11	14 h 30	64	Good coverage
June	27.1°C	14.6°C	102 mm	9.6	15 h 11	74	Good coverage
July	29°C	16.4°C	84 mm	7.7	14 h 55	70	Good coverage
August	27.7°C	15°C	88 mm	7.2	13 h 51	76	Good coverage
September	24.6°C	10.8°C	74 mm	6.4	12 h 25	82	Good coverage
October	17.1°C	4.3°C	79 mm	7.7	11 h 01	48	Good coverage
November	9.4°C	-1.3°C	55 mm	6.3	9 h 46	17	Good coverage
December	2°C	-6.9°C	46 mm	5.9	9 h 10	5	Good coverage

Records at CHICAGO AURORA MUNI AP, 1998–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.8°C7 Jan 2008	-36.0°C16 Jan 2009	28 mm29 Jan 2013	84 mm2013 · driest 4 mm in 2004	28
February	23.3°C27 Feb 2024	-30.5°C11 Feb 2014	49 mm26 Feb 2009	90 mm2023 · driest 1 mm in 2003	28
March	28.3°C20 Mar 2012	-24.4°C4 Mar 2002	41 mm30 Mar 2017	128 mm2026 · driest 11 mm in 2015	28
April	32.2°C18 Apr 2002	-9.9°C7 Apr 2018	64 mm22 Apr 1999	191 mm2013 · driest 27 mm in 2021	28
May	36.1°C27 May 2012	-6.1°C3 May 2005	60 mm30 May 2004	250 mm2019 · driest 32 mm in 2023	28
June	36.7°C28 Jun 2012	1.7°C1 Jun 2003	73 mm15 Jun 2015	228 mm2014 · driest 13 mm in 2005	28
July	38.9°C7 Jul 2012	6.7°C2 Jul 2001	110 mm2 Jul 2026	244 mm2026 · driest 0 mm in 2002	28
August	36.1°C2 Aug 2006	4.4°C31 Aug 2009	94 mm8 Aug 2007	218 mm2007 · driest 12 mm in 2020	27
September	35.0°C13 Sep 2005	-1.6°C24 Sep 2012	131 mm13 Sep 2008	249 mm2008 · driest 12 mm in 2009	27
October	32.8°C3 Oct 2025	-7.2°C2 Oct 2003	131 mm14 Oct 2017	250 mm2017 · driest 11 mm in 2005	28
November	25.0°C1 Nov 2016	-17.7°C22 Nov 2015	45 mm4 Nov 2003	144 mm2003 · driest 12 mm in 2021	28
December	21.1°C3 Dec 2012	-27.7°C19 Dec 2016	44 mm27 Dec 2008	141 mm2015 · driest 11 mm in 2017	28

Typical days per month at CHICAGO AURORA MUNI AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	29	1
February	0	0	26	1
March	<1	0	23	2
April	3	<1	10	3
May	10	3	1	4
June	22	8	0	3
July	28	13	0	3
August	25	8	0	3
September	16	4	<1	2
October	4	<1	8	3
November	0	0	19	2
December	0	0	26	2

How often, not how much — every day in CHICAGO AURORA MUNI 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%	17%	4%	14%	-3.4–2.3°C
February	<1%	16%	4%	14%	-5.0–5.6°C
March	5%	25%	6%	32%	6.2–12.9°C
April	20%	32%	10%	37%	13.9–18.4°C
May	46%	33%	11%	40%	20.0–24.7°C
June	67%	30%	11%	37%	25.8–29.1°C
July	74%	26%	11%	30%	26.9–30.8°C
August	76%	23%	10%	24%	26.1–29.2°C
September	69%	20%	7%	21%	23.0–26.9°C
October	27%	25%	8%	24%	15.0–19.9°C
November	5%	20%	6%	21%	6.0–12.7°C
December	<1%	19%	5%	16%	-1.8–6.2°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.

1999Each stripe is one year’s mean temperature against the 27-year average. Warmest: 2024. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4906143
NOAA station: USW00004808 · CHICAGO AURORA MUNI AP
Station distance: 12.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 41.66°, 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 CHICAGO AURORA MUNI AP is what differs

Yorkville→Sugar Grove→Lynwood→Sandwich→Elburn→Lake Holiday→

Or put two places side by side: Plano vs Yorkville

Best time to visitPlano.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Plano.

The whole year,
without the guesswork.

Nearby, measured,
and named.