United States · 1991–2020

Best time to visit
Johnston.

September leads for comfortable weather in Johnston: typically 23.8°C by day, 13.6°C at night, with 106 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.8°C

Typical low13.6°C

Rain in September106 mm

Comfort

September

September · June · August

83climate match

Beach

July

July · August · June

80climate match

Outdoors

May

May · October · September

82climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 3.5°C, 20° 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

53.5° / -5.5°

Feb

54.7° / -4.7°

Mar

58.7° / -1°

Apr

3514.9° / 4.2°

May

6620.5° / 9.6°

Jun

8225.4° / 14.9°

Jul

6928.7° / 18.5°

Aug

7127.8° / 17.7°

Sep

8323.8° / 13.6°

Oct

5017.6° / 7.3°

Nov

2111.7° / 2.1°

Dec

56.3° / -2.4°

Monthly climate evidence for Johnston — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.5°C	-5.5°C	101 mm	9	9 h 27	5	Strong coverage
February	4.7°C	-4.7°C	88 mm	8	10 h 31	5	Strong coverage
March	8.7°C	-1°C	125 mm	9.2	11 h 48	5	Strong coverage
April	14.9°C	4.2°C	110 mm	9.1	13 h 17	35	Strong coverage
May	20.5°C	9.6°C	86 mm	9	14 h 31	66	Strong coverage
June	25.4°C	14.9°C	97 mm	8.4	15 h 12	82	Strong coverage
July	28.7°C	18.5°C	74 mm	7.3	14 h 56	69	Strong coverage
August	27.8°C	17.7°C	91 mm	7.3	13 h 51	71	Strong coverage
September	23.8°C	13.6°C	106 mm	7.4	12 h 26	83	Strong coverage
October	17.6°C	7.3°C	106 mm	8.4	11 h 00	50	Strong coverage
November	11.7°C	2.1°C	109 mm	8.1	9 h 46	21	Strong coverage
December	6.3°C	-2.4°C	119 mm	9.8	9 h 09	5	Strong coverage

What has changed

Johnston runs +1.2°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

+1.6

Feb

+1.8

Mar

+1.2

Apr

+0.8

May

+0.9

Jun

+0.5

Jul

+1.3

Aug

+1.1

Sep

+1.2

Oct

+1.0

Nov

+0.8

Dec

+2.1

September daytime highs, 2011–2025. Last recorded: 24.1°C.

Records at PROVIDENCE, 1948–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C12 Jan 2020	-25.0°C23 Jan 1976	74 mm4 Jan 1982	296 mm1979 · driest 13 mm in 1970	79
February	22.2°C18 Feb 1981	-22.7°C14 Feb 2016	70 mm13 Feb 2008	183 mm1984 · driest 10 mm in 1987	79
March	29.4°C31 Mar 1998	-17.2°C6 Mar 1948	135 mm30 Mar 2010	415 mm2010 · driest 14 mm in 1981	79
April	36.7°C19 Apr 1976	-10.0°C4 Apr 1954	109 mm10 Apr 1983	324 mm1983 · driest 38 mm in 1966	79
May	35.6°C26 May 2010	-1.7°C9 May 1956	131 mm31 May 1984	269 mm1948 · driest 18 mm in 1964	79
June	37.8°C24 Jun 2025	5.0°C1 Jun 1967	84 mm13 Jun 1998	282 mm1982 · driest 1 mm in 1949	79
July	38.9°C21 Jul 1991	8.9°C1 Jul 1988	121 mm30 Jul 1976	267 mm2009 · driest 8 mm in 1952	79
August	40.0°C2 Aug 1975	4.4°C31 Aug 1965	160 mm4 Aug 1979	283 mm1955 · driest 18 mm in 1984	78
September	37.8°C11 Sep 1983	0.0°C30 Sep 1951	120 mm21 Sep 1961	279 mm2008 · driest 19 mm in 2014	78
October	31.1°C10 Oct 1949	-6.7°C27 Oct 1976	137 mm5 Oct 1962	391 mm2005 · driest 10 mm in 1994	78
November	27.2°C2 Nov 1950	-14.4°C24 Nov 1989	89 mm25 Nov 1983	280 mm1983 · driest 10 mm in 2001	78
December	25.0°C7 Dec 1998	-23.3°C25 Dec 1980	117 mm11 Dec 2024	273 mm1969 · driest 15 mm in 1955	78

Typical days per month at PROVIDENCE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	6
February	0	0	24	3	5
March	<1	0	19	4	4
April	1	<1	4	4	<1
May	6	2	0	3	0
June	17	5	0	3	0
July	27	11	0	2	0
August	25	9	0	3	0
September	12	2	0	3	0
October	2	0	1	3	<1
November	<1	0	11	3	<1
December	0	0	23	4	3

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 88); on 2011–2025 it is September (88). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in PROVIDENCE’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%	29%	11%	34%	-0.3–6.1°C
February	<1%	28%	10%	33%	1.5–7.1°C
March	3%	29%	12%	36%	5.9–11.1°C
April	14%	30%	11%	36%	12.5–16.4°C
May	42%	29%	9%	34%	17.8–22.2°C
June	69%	27%	9%	28%	23.1–26.8°C
July	77%	23%	8%	20%	26.4–30.1°C
August	76%	23%	10%	22%	25.8–29.1°C
September	64%	23%	10%	24%	21.8–25.0°C
October	26%	24%	10%	25%	16.0–19.5°C
November	4%	28%	11%	31%	9.3–13.8°C
December	<1%	31%	12%	39%	2.5–8.4°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.

1948Each stripe is one year’s mean temperature against the 78-year average. Warmest: 2021. Coolest: 1978.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8604682
NOAA station: USW00014765 · PROVIDENCE
Station distance: 12.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 41.82°, 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 PROVIDENCE is what differs

Providence→Warwick→Cranston→East Providence→North Providence→West Warwick→

Or put two places side by side: Johnston vs Providence

Best time to visitJohnston.

September

July

May

The whole year,without the guesswork.

Johnston runs +1.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Johnston.

The whole year,
without the guesswork.

Johnston runs +1.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.