United States · 1991–2020

Best time to visit
Edison.

September leads for comfortable weather in Edison: typically 24.7°C by day, 11.9°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.7°C

Typical low11.9°C

Rain in September82 mm

Comfort

September

September · August · June

81climate match

Beach

July

July · August · June

74climate match

Outdoors

October

October · May · September

73climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only 1.3°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

51.3° / -7.4°

Feb

52.9° / -6.1°

Mar

119° / -1.6°

Apr

4216.6° / 4.1°

May

7022.6° / 10.4°

Jun

7326.9° / 15.4°

Jul

6928.7° / 17.1°

Aug

7527.8° / 15.9°

Sep

8124.7° / 11.9°

Oct

5217.6° / 6.1°

Nov

2110.5° / 0.5°

Dec

53.8° / -4.1°

Monthly climate evidence for Edison — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.3°C	-7.4°C	56 mm	7.2	9 h 34	5	Good coverage
February	2.9°C	-6.1°C	50 mm	7	10 h 35	5	Good coverage
March	9°C	-1.6°C	68 mm	8.1	11 h 49	11	Good coverage
April	16.6°C	4.1°C	88 mm	10.4	13 h 14	42	Good coverage
May	22.6°C	10.4°C	102 mm	11.1	14 h 25	70	Good coverage
June	26.9°C	15.4°C	110 mm	9.7	15 h 03	73	Good coverage
July	28.7°C	17.1°C	85 mm	8.5	14 h 48	69	Good coverage
August	27.8°C	15.9°C	84 mm	7.8	13 h 47	75	Good coverage
September	24.7°C	11.9°C	82 mm	7.6	12 h 25	81	Good coverage
October	17.6°C	6.1°C	77 mm	8.1	11 h 03	52	Good coverage
November	10.5°C	0.5°C	67 mm	7.3	9 h 52	21	Good coverage
December	3.8°C	-4.1°C	65 mm	7.9	9 h 17	5	Good coverage

Records at MARION MUNI AP, 1998–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C12 Jan 2020	-30.5°C16 Jan 2009	45 mm3 Jan 2000	151 mm2005 · driest 9 mm in 2025	28
February	23.3°C24 Feb 2017	-25.5°C11 Feb 2014	63 mm28 Feb 2011	122 mm2011 · driest 1 mm in 2003	28
March	28.9°C22 Mar 2012	-19.3°C6 Mar 2015	42 mm5 Mar 2011	133 mm2016 · driest 29 mm in 2014	28
April	29.4°C25 Apr 2009	-7.1°C7 Apr 2007	47 mm3 Apr 2018	149 mm2014 · driest 39 mm in 2003	28
May	33.9°C28 May 2012	-2.2°C4 May 2005	67 mm21 May 2004	269 mm2004 · driest 34 mm in 2013	29
June	38.3°C28 Jun 2012	3.9°C2 Jun 2003	57 mm13 Jun 2008	213 mm2008 · driest 21 mm in 2012	29
July	36.1°C31 Jul 1999	7.8°C2 Jul 2007	89 mm9 Jul 2013	235 mm2013 · driest 22 mm in 2002	28
August	35.6°C4 Aug 2002	6.7°C21 Aug 2024	70 mm1 Aug 2020	156 mm2007 · driest 8 mm in 2025	27
September	35.6°C10 Sep 2013	0.6°C24 Sep 2012	88 mm27 Sep 2002	178 mm2012 · driest 9 mm in 2023	27
October	32.2°C1 Oct 2019	-6.0°C30 Oct 2008	50 mm28 Oct 2015	126 mm2006 · driest 8 mm in 2024	27
November	26.1°C1 Nov 2016	-15.5°C13 Nov 2019	60 mm5 Nov 2017	163 mm2017 · driest 18 mm in 2019	28
December	21.1°C6 Dec 1998	-27.2°C25 Dec 2004	64 mm21 Dec 2013	131 mm2011 · driest 7 mm in 2010	28

Typical days per month at MARION MUNI AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	26	2
February	0	0	25	1
March	<1	0	20	3
April	3	0	7	3
May	11	3	<1	4
June	21	7	0	4
July	27	12	0	3
August	26	8	0	3
September	15	4	0	3
October	4	<1	3	3
November	<1	0	16	2
December	0	0	24	2

How often, not how much — every day in MARION 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%	23%	6%	23%	-1.9–4.8°C
February	1%	24%	5%	22%	-1.2–7.3°C
March	6%	27%	8%	36%	6.3–13.6°C
April	24%	35%	10%	47%	14.5–19.1°C
May	45%	36%	12%	47%	20.1–25.1°C
June	67%	31%	13%	38%	25.6–28.4°C
July	73%	28%	9%	30%	26.8–31.0°C
August	75%	24%	9%	23%	26.6–29.1°C
September	67%	24%	9%	25%	22.4–27.2°C
October	31%	26%	8%	26%	15.4–19.7°C
November	6%	23%	6%	23%	7.2–13.4°C
December	<1%	26%	8%	27%	1.3–7.8°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 26-year average. Warmest: 2024. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5152966
NOAA station: USW00004855 · MARION MUNI AP
Station distance: 18.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 40.56°, 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 MARION MUNI AP is what differs

Cardington→Ashley→Caledonia→Waldo→Beech (historical)→Claridon→

Or put two places side by side: Edison vs Cardington

Best time to visitEdison.