Italy · 1991–2020

Best time to visit
Monterotondo.

May leads for comfortable weather in Monterotondo: typically 23.3°C by day, 12.7°C at night, with 60 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.3°C

Typical low12.7°C

Rain in May60 mm

Comfort

May

May · June · September

87climate match

Beach

July

July · August · June

89climate match

Outdoors

April

April · May · October

82climate match

The weakest month is December, scoring 28 against May’s 87 — days reach only 12.7°C, 11° 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

3112° / 3.3°

Feb

3513.1° / 3.3°

Mar

5015.9° / 5.8°

Apr

6218.9° / 8.5°

May

8723.3° / 12.7°

Jun

8328.1° / 16.7°

Jul

6931.1° / 19.3°

Aug

6731.5° / 19.8°

Sep

8126.9° / 16°

Oct

7722.3° / 12.3°

Nov

4716.9° / 8.3°

Dec

2812.7° / 4.8°

Monthly climate evidence for Monterotondo — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	12°C	3.3°C	67 mm	7.6	9 h 25	31	Good coverage
February	13.1°C	3.3°C	63 mm	7.5	10 h 30	35	Strong coverage
March	15.9°C	5.8°C	59 mm	6.8	11 h 48	50	Strong coverage
April	18.9°C	8.5°C	73 mm	7.9	13 h 17	62	Good coverage
May	23.3°C	12.7°C	60 mm	5.9	14 h 32	87	Good coverage
June	28.1°C	16.7°C	33 mm	3.6	15 h 13	83	Good coverage
July	31.1°C	19.3°C	22 mm	2.3	14 h 57	69	Good coverage
August	31.5°C	19.8°C	33 mm	2.4	13 h 52	67	Good coverage
September	26.9°C	16°C	71 mm	6.6	12 h 26	81	Good coverage
October	22.3°C	12.3°C	96 mm	7.9	11 h	77	Good coverage
November	16.9°C	8.3°C	116 mm	9.5	9 h 45	47	Good coverage
December	12.7°C	4.8°C	104 mm	10.1	9 h 08	28	Good coverage

What has changed

Monterotondo runs +1.5°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

+1.3

Feb

+1.0

Mar

+1.2

Apr

+1.7

May

+1.0

Jun

+2.5

Jul

+1.7

Aug

+2.4

Sep

+1.3

Oct

+1.6

Nov

+1.4

Dec

+1.1

May daytime highs, 2011–2025. Last recorded: 24.3°C.

Records at ROMA CIAMPINO, 1951–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.8°C31 Jan 1965	-11.0°C11 Jan 1985	63 mm13 Jan 1978	193 mm2001 · driest 0 mm in 2000	73
February	22.4°C18 Feb 2014	-6.9°C16 Feb 1956	66 mm26 Feb 1984	169 mm1986 · driest 0 mm in 2000	74
March	26.6°C31 Mar 1981	-6.5°C2 Mar 1963	57 mm16 Mar 2011	151 mm2011 · driest 0 mm in 2000	74
April	30.0°C30 Apr 2013	-2.4°C9 Apr 1956	48 mm24 Apr 1999	235 mm1974 · driest 0 mm in 2009	74
May	34.2°C27 May 2008	1.8°C2 May 1962	77 mm6 May 2013	155 mm2013 · driest 0 mm in 2010	74
June	39.3°C27 Jun 2022	5.6°C6 Jun 1962	94 mm15 Jun 2014	216 mm2014 · driest 0 mm in 2009	74
July	39.4°C28 Jul 1983	9.1°C20 Jul 1966	66 mm15 Jul 2002	89 mm2002 · driest 0 mm in 1988	73
August	40.6°C4 Aug 1981	9.3°C23 Aug 1963	54 mm28 Aug 2002	133 mm2002 · driest 0 mm in 2011	73
September	38.4°C5 Sep 1982	0.0°C30 Sep 2004	132 mm25 Sep 1951	212 mm1951 · driest 3 mm in 1954	72
October	31.9°C9 Oct 2023	0.8°C25 Oct 1981	120 mm2 Oct 1978	262 mm1978 · driest 0 mm in 2009	72
November	26.1°C7 Nov 2021	-5.2°C29 Nov 1973	109 mm7 Nov 1997	246 mm1997 · driest 0 mm in 2009	72
December	20.8°C24 Dec 2002	-5.6°C6 Dec 1964	71 mm11 Dec 2008	267 mm2008 · driest 0 mm in 2009	72

Typical days per month at ROMA CIAMPINO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	5	3
February	0	0	4	2
March	0	0	<1	2
April	<1	0	<1	3
May	9	<1	0	2
June	22	9	0	1
July	27	19	0	<1
August	27	20	0	1
September	20	4	0	3
October	6	0	0	3
November	<1	0	<1	4
December	0	0	3	3

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 90); on 2011–2025 it is May (93). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in ROMA CIAMPINO’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%	26%	8%	31%	10.2–13.7°C
February	<1%	28%	7%	36%	11.0–15.4°C
March	6%	25%	7%	29%	14.0–17.6°C
April	30%	27%	8%	33%	16.5–20.3°C
May	72%	20%	6%	19%	21.1–25.2°C
June	87%	13%	4%	10%	25.4–29.8°C
July	93%	7%	2%	3%	29.0–32.4°C
August	91%	9%	3%	6%	28.9–33.1°C
September	80%	20%	8%	22%	25.2–28.9°C
October	62%	25%	10%	29%	20.7–23.7°C
November	12%	33%	13%	42%	15.1–18.2°C
December	<1%	30%	10%	39%	11.4–14.3°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.

1951Each stripe is one year’s mean temperature against the 61-year average. Warmest: 2024. Coolest: 1980.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3172768
NOAA station: IT000016239 · ROMA CIAMPINO
Station distance: 30 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 42.05°, 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 ROMA CIAMPINO is what differs

Rome→Guidonia Montecelio→Velletri→Marino→Ciampino→Cisterna di Latina→

Or put two places side by side: Monterotondo vs Rome

Best time to visitMonterotondo.

May

July

April

The whole year,without the guesswork.

Monterotondo runs +1.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Monterotondo.

The whole year,
without the guesswork.

Monterotondo runs +1.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.