United States · 1991–2020

Best time to visit
Rome.

September leads for comfortable weather in Rome: typically 26.1°C by day, 12.4°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.1°C

Typical low12.4°C

Rain in September82 mm

Comfort

September

September · May · June

79climate match

Beach

August

August · July · June

74climate match

Outdoors

October

October · April · September

77climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 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° / -7.6°

Feb

54° / -5.4°

Mar

1910.7° / -0.6°

Apr

4818.2° / 5.3°

May

7323.8° / 10.6°

Jun

6928.8° / 15.8°

Jul

6030.4° / 18°

Aug

6729.6° / 17.1°

Sep

7926.1° / 12.4°

Oct

5719.1° / 6.3°

Nov

2110.5° / 0.4°

Dec

53.4° / -5.2°

Monthly climate evidence for Rome — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1°C	-7.6°C	56 mm	6.6	9 h 32	5	Good coverage
February	4°C	-5.4°C	50 mm	5.8	10 h 34	5	Good coverage
March	10.7°C	-0.6°C	69 mm	7.9	11 h 49	19	Good coverage
April	18.2°C	5.3°C	101 mm	9.5	13 h 14	48	Good coverage
May	23.8°C	10.6°C	118 mm	10.4	14 h 26	73	Good coverage
June	28.8°C	15.8°C	101 mm	8.3	15 h 05	69	Good coverage
July	30.4°C	18°C	100 mm	8.1	14 h 50	60	Good coverage
August	29.6°C	17.1°C	87 mm	7.1	13 h 48	67	Good coverage
September	26.1°C	12.4°C	82 mm	6.4	12 h 25	79	Good coverage
October	19.1°C	6.3°C	84 mm	7.8	11 h 02	57	Good coverage
November	10.5°C	0.4°C	64 mm	7.3	9 h 50	21	Good coverage
December	3.4°C	-5.2°C	53 mm	7	9 h 15	5	Good coverage

Records at LACON, 1950–2009
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C31 Jan 1989	-32.8°C5 Jan 1999	64 mm29 Jan 2001	151 mm1965 · driest 5 mm in 1981	48
February	22.8°C27 Feb 1976	-29.4°C5 Feb 1979	89 mm21 Feb 1997	159 mm1997 · driest 2 mm in 1969	48
March	27.2°C28 Mar 1985	-22.2°C1 Mar 1962	79 mm4 Mar 1985	184 mm2009 · driest 22 mm in 1961	48
April	33.9°C29 Apr 1952	-11.7°C7 Apr 1982	67 mm2 Apr 1983	192 mm1965 · driest 25 mm in 1985	48
May	35.0°C1 May 1952	-5.6°C10 May 1966	60 mm27 May 1996	258 mm1995 · driest 3 mm in 1964	50
June	38.9°C25 Jun 1988	2.2°C1 Jun 2003	106 mm20 Jun 1964	257 mm1990 · driest 20 mm in 1988	51
July	39.4°C14 Jul 1977	6.7°C30 Jul 1971	139 mm16 Jul 1977	317 mm1992 · driest 8 mm in 1988	50
August	38.9°C16 Aug 1988	3.3°C28 Aug 1986	83 mm31 Aug 1980	224 mm1981 · driest 20 mm in 1974	52
September	37.2°C8 Sep 1978	-2.2°C23 Sep 1974	124 mm6 Sep 1989	276 mm1961 · driest 0 mm in 1979	51
October	32.2°C2 Oct 1976	-8.9°C29 Oct 1952	118 mm3 Oct 1986	224 mm1991 · driest 1 mm in 1964	51
November	27.8°C1 Nov 1950	-19.4°C26 Nov 1977	70 mm18 Nov 1985	253 mm1985 · driest 5 mm in 1999	49
December	21.7°C3 Dec 1970	-31.1°C23 Dec 1989	54 mm5 Dec 1999	156 mm1971 · driest 7 mm in 1962	48

Typical days per month at LACON, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	7
February	0	0	23	2	4
March	<1	0	19	2	2
April	4	<1	6	4	<1
May	13	3	<1	4	0
June	25	13	0	3	0
July	29	18	0	3	0
August	28	15	0	3	0
September	18	7	<1	3	0
October	6	<1	4	3	<1
November	<1	0	16	2	1
December	0	0	26	2	5

How often, not how much — every day in LACON’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%	20%	4%	15%	-3.9–3.6°C
February	<1%	19%	5%	17%	-0.2–7.2°C
March	8%	26%	8%	30%	6.7–12.9°C
April	29%	30%	11%	36%	15.6–20.6°C
May	56%	31%	12%	40%	21.2–27.1°C
June	72%	27%	11%	31%	27.0–30.7°C
July	74%	26%	11%	29%	28.9–32.6°C
August	76%	23%	10%	24%	27.8–31.6°C
September	71%	22%	10%	24%	24.1–28.0°C
October	37%	24%	9%	26%	16.5–20.9°C
November	6%	23%	7%	24%	7.2–13.4°C
December	<1%	22%	6%	19%	0.3–6.3°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.

1960Each stripe is one year’s mean temperature against the 41-year average. Warmest: 1998. Coolest: 1979.2008

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4908066
NOAA station: USC00114805 · LACON
Station distance: 16.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 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 LACON is what differs

Chillicothe→Henry→Lacon→Washburn→Hopewell→Sparland→

Or put two places side by side: Rome vs Chillicothe

Best time to visitRome.